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MRRzkS/README.md
Rienchy Razak



PortfolioLinkedInEmail


About

Informatics Engineering student at Universitas Pancasila, based in Jakarta.

My work sits in two halves that I am deliberately trying to join. On one side: backend services and full stack applications, where the concerns are correctness, state, and what happens when a request fails halfway through. On the other: applied deep learning, mostly scientific machine learning, where the concerns are formulation and evidence.

Open to internship and entry level software engineering roles, particularly where engineering and applied AI meet.


Tech Stack

Backend
Frontend
Machine Learning
Tooling

Featured Work

Digital wallet backend covering auth, top up, payments, peer to peer transfers and reporting. Transfers settle asynchronously through a background worker, so the request path stays fast and funds are never lost between two accounts. 26 passing tests.

Browser based markdown editor whose PDF export is driven by the browser's own print engine rather than a screenshot, with configurable paper size, margins and page break rules. Fully client side, nothing is uploaded.

Live demo

My personal site, including an authenticated admin area that manages its own content.

Live site

Kolmogorov-Arnold Networks implemented from scratch. B-spline bases built from the Cox-de Boor recursion in pure PyTorch, then benchmarked against a parameter matched MLP under controlled conditions.

Replication of Raissi et al. (2019). Solves the forward PDE without a mesh, then recovers hidden viscosity and advection coefficients from sparse observations alone.

Offline first installable PWA for daily volleyball hitting practice. Layered service worker caching, Web Audio cues, Wake Lock, and streak tracking with export and import. No framework.


Also on the Shelf

ProjectWhat it isStack
Hidden Fluid MechanicsReconstructs an unobserved pressure field from velocity data alone, supervised only by the Navier-Stokes residualPyTorch
CatatStokDesktop inventory management application, built as primary developerJava, JavaFX, Maven
Bron-Kerbosch VisualizerStep by step maximum clique visualizer with pseudocode highlighting and a live recursion stackPython, Pygame

Currently

  • Building an AI integrated engineering project end to end: model, inference service, dashboard, container.
  • Studying Japanese, working toward JLPT certification.
  • Reading around scientific machine learning and its use in industrial and manufacturing settings.

Open to internship and entry level roles. Reach me at rienchy.razak@gmail.com.

Pinned Loading

  1. E-Wallet-REST-APIE-Wallet-REST-APIPublic

    Production-minded digital wallet REST API: auth, top-up, payments, P2P transfers with asynchronous settlement via a background worker.

    JavaScript

  2. online-markdown-editoronline-markdown-editorPublic

    Browser-based markdown editor with true PDF export via the native print engine. Fully client-side, no uploads.

    TypeScript

  3. Kolmogorov-Arnold-NetworkKolmogorov-Arnold-NetworkPublic

    KAN-Torch: Kolmogorov-Arnold Networks implemented from scratch in PyTorch, with B-spline bases via Cox-de Boor recursion and a parameter-matched MLP benchmark.

    Jupyter Notebook

  4. physics-informed-burgers-pinnphysics-informed-burgers-pinnPublic

    PyTorch replication of Raissi et al. (2019): solving the 1D Burgers' equation and recovering hidden PDE coefficients from sparse data.

    Jupyter Notebook

  5. fly-highfly-highPublic

    Hitter Protocol: offline-first installable PWA for daily volleyball hitting practice. Service worker caching, Web Audio cues, Wake Lock, streak tracking. No framework.

    JavaScript

, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all \u003cpre\u003e\u003ccode\u003e blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks"); } } catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); } })(); (function(){ try { var __m = "github.com"; var __re = new RegExp('^' + "github\\.com" + '
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MRRzkS/README.md
Rienchy Razak



PortfolioLinkedInEmail


About

Informatics Engineering student at Universitas Pancasila, based in Jakarta.

My work sits in two halves that I am deliberately trying to join. On one side: backend services and full stack applications, where the concerns are correctness, state, and what happens when a request fails halfway through. On the other: applied deep learning, mostly scientific machine learning, where the concerns are formulation and evidence.

Open to internship and entry level software engineering roles, particularly where engineering and applied AI meet.


Tech Stack

Backend
Frontend
Machine Learning
Tooling

Featured Work

Digital wallet backend covering auth, top up, payments, peer to peer transfers and reporting. Transfers settle asynchronously through a background worker, so the request path stays fast and funds are never lost between two accounts. 26 passing tests.

Browser based markdown editor whose PDF export is driven by the browser's own print engine rather than a screenshot, with configurable paper size, margins and page break rules. Fully client side, nothing is uploaded.

Live demo

My personal site, including an authenticated admin area that manages its own content.

Live site

Kolmogorov-Arnold Networks implemented from scratch. B-spline bases built from the Cox-de Boor recursion in pure PyTorch, then benchmarked against a parameter matched MLP under controlled conditions.

Replication of Raissi et al. (2019). Solves the forward PDE without a mesh, then recovers hidden viscosity and advection coefficients from sparse observations alone.

Offline first installable PWA for daily volleyball hitting practice. Layered service worker caching, Web Audio cues, Wake Lock, and streak tracking with export and import. No framework.


Also on the Shelf

ProjectWhat it isStack
Hidden Fluid MechanicsReconstructs an unobserved pressure field from velocity data alone, supervised only by the Navier-Stokes residualPyTorch
CatatStokDesktop inventory management application, built as primary developerJava, JavaFX, Maven
Bron-Kerbosch VisualizerStep by step maximum clique visualizer with pseudocode highlighting and a live recursion stackPython, Pygame

Currently

  • Building an AI integrated engineering project end to end: model, inference service, dashboard, container.
  • Studying Japanese, working toward JLPT certification.
  • Reading around scientific machine learning and its use in industrial and manufacturing settings.

Open to internship and entry level roles. Reach me at rienchy.razak@gmail.com.

Pinned Loading

  1. E-Wallet-REST-APIE-Wallet-REST-APIPublic

    Production-minded digital wallet REST API: auth, top-up, payments, P2P transfers with asynchronous settlement via a background worker.

    JavaScript

  2. online-markdown-editoronline-markdown-editorPublic

    Browser-based markdown editor with true PDF export via the native print engine. Fully client-side, no uploads.

    TypeScript

  3. Kolmogorov-Arnold-NetworkKolmogorov-Arnold-NetworkPublic

    KAN-Torch: Kolmogorov-Arnold Networks implemented from scratch in PyTorch, with B-spline bases via Cox-de Boor recursion and a parameter-matched MLP benchmark.

    Jupyter Notebook

  4. physics-informed-burgers-pinnphysics-informed-burgers-pinnPublic

    PyTorch replication of Raissi et al. (2019): solving the 1D Burgers' equation and recovering hidden PDE coefficients from sparse data.

    Jupyter Notebook

  5. fly-highfly-highPublic

    Hitter Protocol: offline-first installable PWA for daily volleyball hitting practice. Service worker caching, Web Audio cues, Wake Lock, streak tracking. No framework.

    JavaScript

, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix"); } } catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
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MRRzkS/README.md
Rienchy Razak



PortfolioLinkedInEmail


About

Informatics Engineering student at Universitas Pancasila, based in Jakarta.

My work sits in two halves that I am deliberately trying to join. On one side: backend services and full stack applications, where the concerns are correctness, state, and what happens when a request fails halfway through. On the other: applied deep learning, mostly scientific machine learning, where the concerns are formulation and evidence.

Open to internship and entry level software engineering roles, particularly where engineering and applied AI meet.


Tech Stack

Backend
Frontend
Machine Learning
Tooling

Featured Work

Digital wallet backend covering auth, top up, payments, peer to peer transfers and reporting. Transfers settle asynchronously through a background worker, so the request path stays fast and funds are never lost between two accounts. 26 passing tests.

Browser based markdown editor whose PDF export is driven by the browser's own print engine rather than a screenshot, with configurable paper size, margins and page break rules. Fully client side, nothing is uploaded.

Live demo

My personal site, including an authenticated admin area that manages its own content.

Live site

Kolmogorov-Arnold Networks implemented from scratch. B-spline bases built from the Cox-de Boor recursion in pure PyTorch, then benchmarked against a parameter matched MLP under controlled conditions.

Replication of Raissi et al. (2019). Solves the forward PDE without a mesh, then recovers hidden viscosity and advection coefficients from sparse observations alone.

Offline first installable PWA for daily volleyball hitting practice. Layered service worker caching, Web Audio cues, Wake Lock, and streak tracking with export and import. No framework.


Also on the Shelf

ProjectWhat it isStack
Hidden Fluid MechanicsReconstructs an unobserved pressure field from velocity data alone, supervised only by the Navier-Stokes residualPyTorch
CatatStokDesktop inventory management application, built as primary developerJava, JavaFX, Maven
Bron-Kerbosch VisualizerStep by step maximum clique visualizer with pseudocode highlighting and a live recursion stackPython, Pygame

Currently

  • Building an AI integrated engineering project end to end: model, inference service, dashboard, container.
  • Studying Japanese, working toward JLPT certification.
  • Reading around scientific machine learning and its use in industrial and manufacturing settings.

Open to internship and entry level roles. Reach me at rienchy.razak@gmail.com.

Pinned Loading

  1. E-Wallet-REST-APIE-Wallet-REST-APIPublic

    Production-minded digital wallet REST API: auth, top-up, payments, P2P transfers with asynchronous settlement via a background worker.

    JavaScript

  2. online-markdown-editoronline-markdown-editorPublic

    Browser-based markdown editor with true PDF export via the native print engine. Fully client-side, no uploads.

    TypeScript

  3. Kolmogorov-Arnold-NetworkKolmogorov-Arnold-NetworkPublic

    KAN-Torch: Kolmogorov-Arnold Networks implemented from scratch in PyTorch, with B-spline bases via Cox-de Boor recursion and a parameter-matched MLP benchmark.

    Jupyter Notebook

  4. physics-informed-burgers-pinnphysics-informed-burgers-pinnPublic

    PyTorch replication of Raissi et al. (2019): solving the 1D Burgers' equation and recovering hidden PDE coefficients from sparse data.

    Jupyter Notebook

  5. fly-highfly-highPublic

    Hitter Protocol: offline-first installable PWA for daily volleyball hitting practice. Service worker caching, Web Audio cues, Wake Lock, streak tracking. No framework.

    JavaScript

, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length \u003e 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms"); } } catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
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MRRzkS/README.md
Rienchy Razak



PortfolioLinkedInEmail


About

Informatics Engineering student at Universitas Pancasila, based in Jakarta.

My work sits in two halves that I am deliberately trying to join. On one side: backend services and full stack applications, where the concerns are correctness, state, and what happens when a request fails halfway through. On the other: applied deep learning, mostly scientific machine learning, where the concerns are formulation and evidence.

Open to internship and entry level software engineering roles, particularly where engineering and applied AI meet.


Tech Stack

Backend
Frontend
Machine Learning
Tooling

Featured Work

Digital wallet backend covering auth, top up, payments, peer to peer transfers and reporting. Transfers settle asynchronously through a background worker, so the request path stays fast and funds are never lost between two accounts. 26 passing tests.

Browser based markdown editor whose PDF export is driven by the browser's own print engine rather than a screenshot, with configurable paper size, margins and page break rules. Fully client side, nothing is uploaded.

Live demo

My personal site, including an authenticated admin area that manages its own content.

Live site

Kolmogorov-Arnold Networks implemented from scratch. B-spline bases built from the Cox-de Boor recursion in pure PyTorch, then benchmarked against a parameter matched MLP under controlled conditions.

Replication of Raissi et al. (2019). Solves the forward PDE without a mesh, then recovers hidden viscosity and advection coefficients from sparse observations alone.

Offline first installable PWA for daily volleyball hitting practice. Layered service worker caching, Web Audio cues, Wake Lock, and streak tracking with export and import. No framework.


Also on the Shelf

ProjectWhat it isStack
Hidden Fluid MechanicsReconstructs an unobserved pressure field from velocity data alone, supervised only by the Navier-Stokes residualPyTorch
CatatStokDesktop inventory management application, built as primary developerJava, JavaFX, Maven
Bron-Kerbosch VisualizerStep by step maximum clique visualizer with pseudocode highlighting and a live recursion stackPython, Pygame

Currently

  • Building an AI integrated engineering project end to end: model, inference service, dashboard, container.
  • Studying Japanese, working toward JLPT certification.
  • Reading around scientific machine learning and its use in industrial and manufacturing settings.

Open to internship and entry level roles. Reach me at rienchy.razak@gmail.com.

Pinned Loading

  1. E-Wallet-REST-APIE-Wallet-REST-APIPublic

    Production-minded digital wallet REST API: auth, top-up, payments, P2P transfers with asynchronous settlement via a background worker.

    JavaScript

  2. online-markdown-editoronline-markdown-editorPublic

    Browser-based markdown editor with true PDF export via the native print engine. Fully client-side, no uploads.

    TypeScript

  3. Kolmogorov-Arnold-NetworkKolmogorov-Arnold-NetworkPublic

    KAN-Torch: Kolmogorov-Arnold Networks implemented from scratch in PyTorch, with B-spline bases via Cox-de Boor recursion and a parameter-matched MLP benchmark.

    Jupyter Notebook

  4. physics-informed-burgers-pinnphysics-informed-burgers-pinnPublic

    PyTorch replication of Raissi et al. (2019): solving the 1D Burgers' equation and recovering hidden PDE coefficients from sparse data.

    Jupyter Notebook

  5. fly-highfly-highPublic

    Hitter Protocol: offline-first installable PWA for daily volleyball hitting practice. Service worker caching, Web Audio cues, Wake Lock, streak tracking. No framework.

    JavaScript

, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links"); } } catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); } })(); (function(){ try { var __m = "youtube.com"; var __re = new RegExp('^' + "youtube\\.com" + '
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MRRzkS/README.md
Rienchy Razak



PortfolioLinkedInEmail


About

Informatics Engineering student at Universitas Pancasila, based in Jakarta.

My work sits in two halves that I am deliberately trying to join. On one side: backend services and full stack applications, where the concerns are correctness, state, and what happens when a request fails halfway through. On the other: applied deep learning, mostly scientific machine learning, where the concerns are formulation and evidence.

Open to internship and entry level software engineering roles, particularly where engineering and applied AI meet.


Tech Stack

Backend
Frontend
Machine Learning
Tooling

Featured Work

Digital wallet backend covering auth, top up, payments, peer to peer transfers and reporting. Transfers settle asynchronously through a background worker, so the request path stays fast and funds are never lost between two accounts. 26 passing tests.

Browser based markdown editor whose PDF export is driven by the browser's own print engine rather than a screenshot, with configurable paper size, margins and page break rules. Fully client side, nothing is uploaded.

Live demo

My personal site, including an authenticated admin area that manages its own content.

Live site

Kolmogorov-Arnold Networks implemented from scratch. B-spline bases built from the Cox-de Boor recursion in pure PyTorch, then benchmarked against a parameter matched MLP under controlled conditions.

Replication of Raissi et al. (2019). Solves the forward PDE without a mesh, then recovers hidden viscosity and advection coefficients from sparse observations alone.

Offline first installable PWA for daily volleyball hitting practice. Layered service worker caching, Web Audio cues, Wake Lock, and streak tracking with export and import. No framework.


Also on the Shelf

ProjectWhat it isStack
Hidden Fluid MechanicsReconstructs an unobserved pressure field from velocity data alone, supervised only by the Navier-Stokes residualPyTorch
CatatStokDesktop inventory management application, built as primary developerJava, JavaFX, Maven
Bron-Kerbosch VisualizerStep by step maximum clique visualizer with pseudocode highlighting and a live recursion stackPython, Pygame

Currently

  • Building an AI integrated engineering project end to end: model, inference service, dashboard, container.
  • Studying Japanese, working toward JLPT certification.
  • Reading around scientific machine learning and its use in industrial and manufacturing settings.

Open to internship and entry level roles. Reach me at rienchy.razak@gmail.com.

Pinned Loading

  1. E-Wallet-REST-APIE-Wallet-REST-APIPublic

    Production-minded digital wallet REST API: auth, top-up, payments, P2P transfers with asynchronous settlement via a background worker.

    JavaScript

  2. online-markdown-editoronline-markdown-editorPublic

    Browser-based markdown editor with true PDF export via the native print engine. Fully client-side, no uploads.

    TypeScript

  3. Kolmogorov-Arnold-NetworkKolmogorov-Arnold-NetworkPublic

    KAN-Torch: Kolmogorov-Arnold Networks implemented from scratch in PyTorch, with B-spline bases via Cox-de Boor recursion and a parameter-matched MLP benchmark.

    Jupyter Notebook

  4. physics-informed-burgers-pinnphysics-informed-burgers-pinnPublic

    PyTorch replication of Raissi et al. (2019): solving the 1D Burgers' equation and recovering hidden PDE coefficients from sparse data.

    Jupyter Notebook

  5. fly-highfly-highPublic

    Hitter Protocol: offline-first installable PWA for daily volleyball hitting practice. Service worker caching, Web Audio cues, Wake Lock, streak tracking. No framework.

    JavaScript

, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default"); } } catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
Skip to content
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Report abuse
MRRzkS/README.md
Rienchy Razak



PortfolioLinkedInEmail


About

Informatics Engineering student at Universitas Pancasila, based in Jakarta.

My work sits in two halves that I am deliberately trying to join. On one side: backend services and full stack applications, where the concerns are correctness, state, and what happens when a request fails halfway through. On the other: applied deep learning, mostly scientific machine learning, where the concerns are formulation and evidence.

Open to internship and entry level software engineering roles, particularly where engineering and applied AI meet.


Tech Stack

Backend
Frontend
Machine Learning
Tooling

Featured Work

Digital wallet backend covering auth, top up, payments, peer to peer transfers and reporting. Transfers settle asynchronously through a background worker, so the request path stays fast and funds are never lost between two accounts. 26 passing tests.

Browser based markdown editor whose PDF export is driven by the browser's own print engine rather than a screenshot, with configurable paper size, margins and page break rules. Fully client side, nothing is uploaded.

Live demo

My personal site, including an authenticated admin area that manages its own content.

Live site

Kolmogorov-Arnold Networks implemented from scratch. B-spline bases built from the Cox-de Boor recursion in pure PyTorch, then benchmarked against a parameter matched MLP under controlled conditions.

Replication of Raissi et al. (2019). Solves the forward PDE without a mesh, then recovers hidden viscosity and advection coefficients from sparse observations alone.

Offline first installable PWA for daily volleyball hitting practice. Layered service worker caching, Web Audio cues, Wake Lock, and streak tracking with export and import. No framework.


Also on the Shelf

ProjectWhat it isStack
Hidden Fluid MechanicsReconstructs an unobserved pressure field from velocity data alone, supervised only by the Navier-Stokes residualPyTorch
CatatStokDesktop inventory management application, built as primary developerJava, JavaFX, Maven
Bron-Kerbosch VisualizerStep by step maximum clique visualizer with pseudocode highlighting and a live recursion stackPython, Pygame

Currently

  • Building an AI integrated engineering project end to end: model, inference service, dashboard, container.
  • Studying Japanese, working toward JLPT certification.
  • Reading around scientific machine learning and its use in industrial and manufacturing settings.

Open to internship and entry level roles. Reach me at rienchy.razak@gmail.com.

Pinned Loading

  1. E-Wallet-REST-APIE-Wallet-REST-APIPublic

    Production-minded digital wallet REST API: auth, top-up, payments, P2P transfers with asynchronous settlement via a background worker.

    JavaScript

  2. online-markdown-editoronline-markdown-editorPublic

    Browser-based markdown editor with true PDF export via the native print engine. Fully client-side, no uploads.

    TypeScript

  3. Kolmogorov-Arnold-NetworkKolmogorov-Arnold-NetworkPublic

    KAN-Torch: Kolmogorov-Arnold Networks implemented from scratch in PyTorch, with B-spline bases via Cox-de Boor recursion and a parameter-matched MLP benchmark.

    Jupyter Notebook

  4. physics-informed-burgers-pinnphysics-informed-burgers-pinnPublic

    PyTorch replication of Raissi et al. (2019): solving the 1D Burgers' equation and recovering hidden PDE coefficients from sparse data.

    Jupyter Notebook

  5. fly-highfly-highPublic

    Hitter Protocol: offline-first installable PWA for daily volleyball hitting practice. Service worker caching, Web Audio cues, Wake Lock, streak tracking. No framework.

    JavaScript

, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers"); } } catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
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MRRzkS/README.md
Rienchy Razak



PortfolioLinkedInEmail


About

Informatics Engineering student at Universitas Pancasila, based in Jakarta.

My work sits in two halves that I am deliberately trying to join. On one side: backend services and full stack applications, where the concerns are correctness, state, and what happens when a request fails halfway through. On the other: applied deep learning, mostly scientific machine learning, where the concerns are formulation and evidence.

Open to internship and entry level software engineering roles, particularly where engineering and applied AI meet.


Tech Stack

Backend
Frontend
Machine Learning
Tooling

Featured Work

Digital wallet backend covering auth, top up, payments, peer to peer transfers and reporting. Transfers settle asynchronously through a background worker, so the request path stays fast and funds are never lost between two accounts. 26 passing tests.

Browser based markdown editor whose PDF export is driven by the browser's own print engine rather than a screenshot, with configurable paper size, margins and page break rules. Fully client side, nothing is uploaded.

Live demo

My personal site, including an authenticated admin area that manages its own content.

Live site

Kolmogorov-Arnold Networks implemented from scratch. B-spline bases built from the Cox-de Boor recursion in pure PyTorch, then benchmarked against a parameter matched MLP under controlled conditions.

Replication of Raissi et al. (2019). Solves the forward PDE without a mesh, then recovers hidden viscosity and advection coefficients from sparse observations alone.

Offline first installable PWA for daily volleyball hitting practice. Layered service worker caching, Web Audio cues, Wake Lock, and streak tracking with export and import. No framework.


Also on the Shelf

ProjectWhat it isStack
Hidden Fluid MechanicsReconstructs an unobserved pressure field from velocity data alone, supervised only by the Navier-Stokes residualPyTorch
CatatStokDesktop inventory management application, built as primary developerJava, JavaFX, Maven
Bron-Kerbosch VisualizerStep by step maximum clique visualizer with pseudocode highlighting and a live recursion stackPython, Pygame

Currently

  • Building an AI integrated engineering project end to end: model, inference service, dashboard, container.
  • Studying Japanese, working toward JLPT certification.
  • Reading around scientific machine learning and its use in industrial and manufacturing settings.

Open to internship and entry level roles. Reach me at rienchy.razak@gmail.com.

Pinned Loading

  1. E-Wallet-REST-APIE-Wallet-REST-APIPublic

    Production-minded digital wallet REST API: auth, top-up, payments, P2P transfers with asynchronous settlement via a background worker.

    JavaScript

  2. online-markdown-editoronline-markdown-editorPublic

    Browser-based markdown editor with true PDF export via the native print engine. Fully client-side, no uploads.

    TypeScript

  3. Kolmogorov-Arnold-NetworkKolmogorov-Arnold-NetworkPublic

    KAN-Torch: Kolmogorov-Arnold Networks implemented from scratch in PyTorch, with B-spline bases via Cox-de Boor recursion and a parameter-matched MLP benchmark.

    Jupyter Notebook

  4. physics-informed-burgers-pinnphysics-informed-burgers-pinnPublic

    PyTorch replication of Raissi et al. (2019): solving the 1D Burgers' equation and recovering hidden PDE coefficients from sparse data.

    Jupyter Notebook

  5. fly-highfly-highPublic

    Hitter Protocol: offline-first installable PWA for daily volleyball hitting practice. Service worker caching, Web Audio cues, Wake Lock, streak tracking. No framework.

    JavaScript

, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode"); } } catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); } })(); })();
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MRRzkS/README.md
Rienchy Razak



PortfolioLinkedInEmail


About

Informatics Engineering student at Universitas Pancasila, based in Jakarta.

My work sits in two halves that I am deliberately trying to join. On one side: backend services and full stack applications, where the concerns are correctness, state, and what happens when a request fails halfway through. On the other: applied deep learning, mostly scientific machine learning, where the concerns are formulation and evidence.

Open to internship and entry level software engineering roles, particularly where engineering and applied AI meet.


Tech Stack

Backend
Frontend
Machine Learning
Tooling

Featured Work

Digital wallet backend covering auth, top up, payments, peer to peer transfers and reporting. Transfers settle asynchronously through a background worker, so the request path stays fast and funds are never lost between two accounts. 26 passing tests.

Browser based markdown editor whose PDF export is driven by the browser's own print engine rather than a screenshot, with configurable paper size, margins and page break rules. Fully client side, nothing is uploaded.

Live demo

My personal site, including an authenticated admin area that manages its own content.

Live site

Kolmogorov-Arnold Networks implemented from scratch. B-spline bases built from the Cox-de Boor recursion in pure PyTorch, then benchmarked against a parameter matched MLP under controlled conditions.

Replication of Raissi et al. (2019). Solves the forward PDE without a mesh, then recovers hidden viscosity and advection coefficients from sparse observations alone.

Offline first installable PWA for daily volleyball hitting practice. Layered service worker caching, Web Audio cues, Wake Lock, and streak tracking with export and import. No framework.


Also on the Shelf

ProjectWhat it isStack
Hidden Fluid MechanicsReconstructs an unobserved pressure field from velocity data alone, supervised only by the Navier-Stokes residualPyTorch
CatatStokDesktop inventory management application, built as primary developerJava, JavaFX, Maven
Bron-Kerbosch VisualizerStep by step maximum clique visualizer with pseudocode highlighting and a live recursion stackPython, Pygame

Currently

  • Building an AI integrated engineering project end to end: model, inference service, dashboard, container.
  • Studying Japanese, working toward JLPT certification.
  • Reading around scientific machine learning and its use in industrial and manufacturing settings.

Open to internship and entry level roles. Reach me at rienchy.razak@gmail.com.

Pinned Loading

  1. E-Wallet-REST-APIE-Wallet-REST-APIPublic

    Production-minded digital wallet REST API: auth, top-up, payments, P2P transfers with asynchronous settlement via a background worker.

    JavaScript

  2. online-markdown-editoronline-markdown-editorPublic

    Browser-based markdown editor with true PDF export via the native print engine. Fully client-side, no uploads.

    TypeScript

  3. Kolmogorov-Arnold-NetworkKolmogorov-Arnold-NetworkPublic

    KAN-Torch: Kolmogorov-Arnold Networks implemented from scratch in PyTorch, with B-spline bases via Cox-de Boor recursion and a parameter-matched MLP benchmark.

    Jupyter Notebook

  4. physics-informed-burgers-pinnphysics-informed-burgers-pinnPublic

    PyTorch replication of Raissi et al. (2019): solving the 1D Burgers' equation and recovering hidden PDE coefficients from sparse data.

    Jupyter Notebook

  5. fly-highfly-highPublic

    Hitter Protocol: offline-first installable PWA for daily volleyball hitting practice. Service worker caching, Web Audio cues, Wake Lock, streak tracking. No framework.

    JavaScript