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manvankaliber/README.md

Jack van der Bilt

Former Software engineer gone entrepreneur and fulltime systems thinker. Focused on building reliable technology, improving core processes, and creating organizations that solve meaningful problems with technology.

I work across software development, architecture, automation, process optimization, and organizational design. My primary interest is not technology for its own sake, but technology that measurably improves how people, teams, and systems operate.

Public GitHub activity

This profile does not represent the full scope of my professional work.

I use separate Git accounts for the organizations I work with, and much of my software is maintained privately for reasons including operational stability, security, confidentiality, and long-term maintainability.

As a result, the absence of public repositories here should not be interpreted as an absence of active engineering work.

Open-source collaboration

I am open to contributing to serious open-source projects that create tangible value.

I am particularly interested in projects that:

  • improve software-development efficiency;
  • reduce unnecessary complexity;
  • create better tools for developers;
  • improve accessibility or usability for end users;
  • automate repetitive or error-prone work;
  • strengthen critical digital infrastructure;
  • address meaningful social or organizational problems.
  • allows for better utilization of resources.

I value projects with clear objectives, disciplined engineering practices, responsible maintainership, and a genuine commitment to long-term usefulness.

Beyond software

In addition to engineering, I work on entrepreneurial and societal initiatives.

My broader work focuses on building structures that make services more accessible, organizations more effective, and difficult processes easier to navigate. This includes my initiatives such as De Tandartsfee, which works to improve access to necessary dental care in the Netherlands.

Technology, entrepreneurship, and social impact are not separate interests to me. They are different instruments for solving the same kind of problem: systems that do not work as well as they should.

How I work

I approach problems by examining the complete system rather than immediately optimizing individual components.

That usually means:

  1. defining the actual objective;
  2. identifying constraints and failure points;
  3. removing unnecessary steps and dependencies;
  4. designing the simplest reliable solution;
  5. measuring whether the result produces meaningful improvement.

I care about execution, ownership, clarity, and outcomes.

Collaboration

I am interested in working with engineers, maintainers, founders, and organizations developing technology that has a defensible reason to exist.

Relevant areas include:

  • developer infrastructure;
  • automation;
  • modern workplace technology;
  • public-interest technology;
  • healthcare and social-sector systems;
  • performance and reliability;
  • open-source software with measurable end-user value.

Links


Build systems that make useful work easier, faster, and more reliable.

Popular repositories Loading

  1. manvankaliber manvankaliberPublic

, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all
 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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manvankaliber/README.md

Jack van der Bilt

Former Software engineer gone entrepreneur and fulltime systems thinker. Focused on building reliable technology, improving core processes, and creating organizations that solve meaningful problems with technology.

I work across software development, architecture, automation, process optimization, and organizational design. My primary interest is not technology for its own sake, but technology that measurably improves how people, teams, and systems operate.

Public GitHub activity

This profile does not represent the full scope of my professional work.

I use separate Git accounts for the organizations I work with, and much of my software is maintained privately for reasons including operational stability, security, confidentiality, and long-term maintainability.

As a result, the absence of public repositories here should not be interpreted as an absence of active engineering work.

Open-source collaboration

I am open to contributing to serious open-source projects that create tangible value.

I am particularly interested in projects that:

  • improve software-development efficiency;
  • reduce unnecessary complexity;
  • create better tools for developers;
  • improve accessibility or usability for end users;
  • automate repetitive or error-prone work;
  • strengthen critical digital infrastructure;
  • address meaningful social or organizational problems.
  • allows for better utilization of resources.

I value projects with clear objectives, disciplined engineering practices, responsible maintainership, and a genuine commitment to long-term usefulness.

Beyond software

In addition to engineering, I work on entrepreneurial and societal initiatives.

My broader work focuses on building structures that make services more accessible, organizations more effective, and difficult processes easier to navigate. This includes my initiatives such as De Tandartsfee, which works to improve access to necessary dental care in the Netherlands.

Technology, entrepreneurship, and social impact are not separate interests to me. They are different instruments for solving the same kind of problem: systems that do not work as well as they should.

How I work

I approach problems by examining the complete system rather than immediately optimizing individual components.

That usually means:

  1. defining the actual objective;
  2. identifying constraints and failure points;
  3. removing unnecessary steps and dependencies;
  4. designing the simplest reliable solution;
  5. measuring whether the result produces meaningful improvement.

I care about execution, ownership, clarity, and outcomes.

Collaboration

I am interested in working with engineers, maintainers, founders, and organizations developing technology that has a defensible reason to exist.

Relevant areas include:

  • developer infrastructure;
  • automation;
  • modern workplace technology;
  • public-interest technology;
  • healthcare and social-sector systems;
  • performance and reliability;
  • open-source software with measurable end-user value.

Links


Build systems that make useful work easier, faster, and more reliable.

Popular repositories Loading

  1. manvankaliber manvankaliberPublic

, '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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manvankaliber/README.md

Jack van der Bilt

Former Software engineer gone entrepreneur and fulltime systems thinker. Focused on building reliable technology, improving core processes, and creating organizations that solve meaningful problems with technology.

I work across software development, architecture, automation, process optimization, and organizational design. My primary interest is not technology for its own sake, but technology that measurably improves how people, teams, and systems operate.

Public GitHub activity

This profile does not represent the full scope of my professional work.

I use separate Git accounts for the organizations I work with, and much of my software is maintained privately for reasons including operational stability, security, confidentiality, and long-term maintainability.

As a result, the absence of public repositories here should not be interpreted as an absence of active engineering work.

Open-source collaboration

I am open to contributing to serious open-source projects that create tangible value.

I am particularly interested in projects that:

  • improve software-development efficiency;
  • reduce unnecessary complexity;
  • create better tools for developers;
  • improve accessibility or usability for end users;
  • automate repetitive or error-prone work;
  • strengthen critical digital infrastructure;
  • address meaningful social or organizational problems.
  • allows for better utilization of resources.

I value projects with clear objectives, disciplined engineering practices, responsible maintainership, and a genuine commitment to long-term usefulness.

Beyond software

In addition to engineering, I work on entrepreneurial and societal initiatives.

My broader work focuses on building structures that make services more accessible, organizations more effective, and difficult processes easier to navigate. This includes my initiatives such as De Tandartsfee, which works to improve access to necessary dental care in the Netherlands.

Technology, entrepreneurship, and social impact are not separate interests to me. They are different instruments for solving the same kind of problem: systems that do not work as well as they should.

How I work

I approach problems by examining the complete system rather than immediately optimizing individual components.

That usually means:

  1. defining the actual objective;
  2. identifying constraints and failure points;
  3. removing unnecessary steps and dependencies;
  4. designing the simplest reliable solution;
  5. measuring whether the result produces meaningful improvement.

I care about execution, ownership, clarity, and outcomes.

Collaboration

I am interested in working with engineers, maintainers, founders, and organizations developing technology that has a defensible reason to exist.

Relevant areas include:

  • developer infrastructure;
  • automation;
  • modern workplace technology;
  • public-interest technology;
  • healthcare and social-sector systems;
  • performance and reliability;
  • open-source software with measurable end-user value.

Links


Build systems that make useful work easier, faster, and more reliable.

Popular repositories Loading

  1. manvankaliber manvankaliberPublic

, '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 > 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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Maximum 250 characters. Please don’t include any personal information such as legal names or email addresses. Markdown is supported. This note will only be visible to you.
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manvankaliber/README.md

Jack van der Bilt

Former Software engineer gone entrepreneur and fulltime systems thinker. Focused on building reliable technology, improving core processes, and creating organizations that solve meaningful problems with technology.

I work across software development, architecture, automation, process optimization, and organizational design. My primary interest is not technology for its own sake, but technology that measurably improves how people, teams, and systems operate.

Public GitHub activity

This profile does not represent the full scope of my professional work.

I use separate Git accounts for the organizations I work with, and much of my software is maintained privately for reasons including operational stability, security, confidentiality, and long-term maintainability.

As a result, the absence of public repositories here should not be interpreted as an absence of active engineering work.

Open-source collaboration

I am open to contributing to serious open-source projects that create tangible value.

I am particularly interested in projects that:

  • improve software-development efficiency;
  • reduce unnecessary complexity;
  • create better tools for developers;
  • improve accessibility or usability for end users;
  • automate repetitive or error-prone work;
  • strengthen critical digital infrastructure;
  • address meaningful social or organizational problems.
  • allows for better utilization of resources.

I value projects with clear objectives, disciplined engineering practices, responsible maintainership, and a genuine commitment to long-term usefulness.

Beyond software

In addition to engineering, I work on entrepreneurial and societal initiatives.

My broader work focuses on building structures that make services more accessible, organizations more effective, and difficult processes easier to navigate. This includes my initiatives such as De Tandartsfee, which works to improve access to necessary dental care in the Netherlands.

Technology, entrepreneurship, and social impact are not separate interests to me. They are different instruments for solving the same kind of problem: systems that do not work as well as they should.

How I work

I approach problems by examining the complete system rather than immediately optimizing individual components.

That usually means:

  1. defining the actual objective;
  2. identifying constraints and failure points;
  3. removing unnecessary steps and dependencies;
  4. designing the simplest reliable solution;
  5. measuring whether the result produces meaningful improvement.

I care about execution, ownership, clarity, and outcomes.

Collaboration

I am interested in working with engineers, maintainers, founders, and organizations developing technology that has a defensible reason to exist.

Relevant areas include:

  • developer infrastructure;
  • automation;
  • modern workplace technology;
  • public-interest technology;
  • healthcare and social-sector systems;
  • performance and reliability;
  • open-source software with measurable end-user value.

Links


Build systems that make useful work easier, faster, and more reliable.

Popular repositories Loading

  1. manvankaliber manvankaliberPublic

, '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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manvankaliber/README.md

Jack van der Bilt

Former Software engineer gone entrepreneur and fulltime systems thinker. Focused on building reliable technology, improving core processes, and creating organizations that solve meaningful problems with technology.

I work across software development, architecture, automation, process optimization, and organizational design. My primary interest is not technology for its own sake, but technology that measurably improves how people, teams, and systems operate.

Public GitHub activity

This profile does not represent the full scope of my professional work.

I use separate Git accounts for the organizations I work with, and much of my software is maintained privately for reasons including operational stability, security, confidentiality, and long-term maintainability.

As a result, the absence of public repositories here should not be interpreted as an absence of active engineering work.

Open-source collaboration

I am open to contributing to serious open-source projects that create tangible value.

I am particularly interested in projects that:

  • improve software-development efficiency;
  • reduce unnecessary complexity;
  • create better tools for developers;
  • improve accessibility or usability for end users;
  • automate repetitive or error-prone work;
  • strengthen critical digital infrastructure;
  • address meaningful social or organizational problems.
  • allows for better utilization of resources.

I value projects with clear objectives, disciplined engineering practices, responsible maintainership, and a genuine commitment to long-term usefulness.

Beyond software

In addition to engineering, I work on entrepreneurial and societal initiatives.

My broader work focuses on building structures that make services more accessible, organizations more effective, and difficult processes easier to navigate. This includes my initiatives such as De Tandartsfee, which works to improve access to necessary dental care in the Netherlands.

Technology, entrepreneurship, and social impact are not separate interests to me. They are different instruments for solving the same kind of problem: systems that do not work as well as they should.

How I work

I approach problems by examining the complete system rather than immediately optimizing individual components.

That usually means:

  1. defining the actual objective;
  2. identifying constraints and failure points;
  3. removing unnecessary steps and dependencies;
  4. designing the simplest reliable solution;
  5. measuring whether the result produces meaningful improvement.

I care about execution, ownership, clarity, and outcomes.

Collaboration

I am interested in working with engineers, maintainers, founders, and organizations developing technology that has a defensible reason to exist.

Relevant areas include:

  • developer infrastructure;
  • automation;
  • modern workplace technology;
  • public-interest technology;
  • healthcare and social-sector systems;
  • performance and reliability;
  • open-source software with measurable end-user value.

Links


Build systems that make useful work easier, faster, and more reliable.

Popular repositories Loading

  1. manvankaliber manvankaliberPublic

, '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('^' + ".*" + '
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Report abuse
manvankaliber/README.md

Jack van der Bilt

Former Software engineer gone entrepreneur and fulltime systems thinker. Focused on building reliable technology, improving core processes, and creating organizations that solve meaningful problems with technology.

I work across software development, architecture, automation, process optimization, and organizational design. My primary interest is not technology for its own sake, but technology that measurably improves how people, teams, and systems operate.

Public GitHub activity

This profile does not represent the full scope of my professional work.

I use separate Git accounts for the organizations I work with, and much of my software is maintained privately for reasons including operational stability, security, confidentiality, and long-term maintainability.

As a result, the absence of public repositories here should not be interpreted as an absence of active engineering work.

Open-source collaboration

I am open to contributing to serious open-source projects that create tangible value.

I am particularly interested in projects that:

  • improve software-development efficiency;
  • reduce unnecessary complexity;
  • create better tools for developers;
  • improve accessibility or usability for end users;
  • automate repetitive or error-prone work;
  • strengthen critical digital infrastructure;
  • address meaningful social or organizational problems.
  • allows for better utilization of resources.

I value projects with clear objectives, disciplined engineering practices, responsible maintainership, and a genuine commitment to long-term usefulness.

Beyond software

In addition to engineering, I work on entrepreneurial and societal initiatives.

My broader work focuses on building structures that make services more accessible, organizations more effective, and difficult processes easier to navigate. This includes my initiatives such as De Tandartsfee, which works to improve access to necessary dental care in the Netherlands.

Technology, entrepreneurship, and social impact are not separate interests to me. They are different instruments for solving the same kind of problem: systems that do not work as well as they should.

How I work

I approach problems by examining the complete system rather than immediately optimizing individual components.

That usually means:

  1. defining the actual objective;
  2. identifying constraints and failure points;
  3. removing unnecessary steps and dependencies;
  4. designing the simplest reliable solution;
  5. measuring whether the result produces meaningful improvement.

I care about execution, ownership, clarity, and outcomes.

Collaboration

I am interested in working with engineers, maintainers, founders, and organizations developing technology that has a defensible reason to exist.

Relevant areas include:

  • developer infrastructure;
  • automation;
  • modern workplace technology;
  • public-interest technology;
  • healthcare and social-sector systems;
  • performance and reliability;
  • open-source software with measurable end-user value.

Links


Build systems that make useful work easier, faster, and more reliable.

Popular repositories Loading

  1. manvankaliber manvankaliberPublic

, '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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Maximum 250 characters. Please don’t include any personal information such as legal names or email addresses. Markdown is supported. This note will only be visible to you.
Report abuse

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Report abuse
manvankaliber/README.md

Jack van der Bilt

Former Software engineer gone entrepreneur and fulltime systems thinker. Focused on building reliable technology, improving core processes, and creating organizations that solve meaningful problems with technology.

I work across software development, architecture, automation, process optimization, and organizational design. My primary interest is not technology for its own sake, but technology that measurably improves how people, teams, and systems operate.

Public GitHub activity

This profile does not represent the full scope of my professional work.

I use separate Git accounts for the organizations I work with, and much of my software is maintained privately for reasons including operational stability, security, confidentiality, and long-term maintainability.

As a result, the absence of public repositories here should not be interpreted as an absence of active engineering work.

Open-source collaboration

I am open to contributing to serious open-source projects that create tangible value.

I am particularly interested in projects that:

  • improve software-development efficiency;
  • reduce unnecessary complexity;
  • create better tools for developers;
  • improve accessibility or usability for end users;
  • automate repetitive or error-prone work;
  • strengthen critical digital infrastructure;
  • address meaningful social or organizational problems.
  • allows for better utilization of resources.

I value projects with clear objectives, disciplined engineering practices, responsible maintainership, and a genuine commitment to long-term usefulness.

Beyond software

In addition to engineering, I work on entrepreneurial and societal initiatives.

My broader work focuses on building structures that make services more accessible, organizations more effective, and difficult processes easier to navigate. This includes my initiatives such as De Tandartsfee, which works to improve access to necessary dental care in the Netherlands.

Technology, entrepreneurship, and social impact are not separate interests to me. They are different instruments for solving the same kind of problem: systems that do not work as well as they should.

How I work

I approach problems by examining the complete system rather than immediately optimizing individual components.

That usually means:

  1. defining the actual objective;
  2. identifying constraints and failure points;
  3. removing unnecessary steps and dependencies;
  4. designing the simplest reliable solution;
  5. measuring whether the result produces meaningful improvement.

I care about execution, ownership, clarity, and outcomes.

Collaboration

I am interested in working with engineers, maintainers, founders, and organizations developing technology that has a defensible reason to exist.

Relevant areas include:

  • developer infrastructure;
  • automation;
  • modern workplace technology;
  • public-interest technology;
  • healthcare and social-sector systems;
  • performance and reliability;
  • open-source software with measurable end-user value.

Links


Build systems that make useful work easier, faster, and more reliable.

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  1. manvankaliber manvankaliberPublic

, '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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manvankaliber/README.md

Jack van der Bilt

Former Software engineer gone entrepreneur and fulltime systems thinker. Focused on building reliable technology, improving core processes, and creating organizations that solve meaningful problems with technology.

I work across software development, architecture, automation, process optimization, and organizational design. My primary interest is not technology for its own sake, but technology that measurably improves how people, teams, and systems operate.

Public GitHub activity

This profile does not represent the full scope of my professional work.

I use separate Git accounts for the organizations I work with, and much of my software is maintained privately for reasons including operational stability, security, confidentiality, and long-term maintainability.

As a result, the absence of public repositories here should not be interpreted as an absence of active engineering work.

Open-source collaboration

I am open to contributing to serious open-source projects that create tangible value.

I am particularly interested in projects that:

  • improve software-development efficiency;
  • reduce unnecessary complexity;
  • create better tools for developers;
  • improve accessibility or usability for end users;
  • automate repetitive or error-prone work;
  • strengthen critical digital infrastructure;
  • address meaningful social or organizational problems.
  • allows for better utilization of resources.

I value projects with clear objectives, disciplined engineering practices, responsible maintainership, and a genuine commitment to long-term usefulness.

Beyond software

In addition to engineering, I work on entrepreneurial and societal initiatives.

My broader work focuses on building structures that make services more accessible, organizations more effective, and difficult processes easier to navigate. This includes my initiatives such as De Tandartsfee, which works to improve access to necessary dental care in the Netherlands.

Technology, entrepreneurship, and social impact are not separate interests to me. They are different instruments for solving the same kind of problem: systems that do not work as well as they should.

How I work

I approach problems by examining the complete system rather than immediately optimizing individual components.

That usually means:

  1. defining the actual objective;
  2. identifying constraints and failure points;
  3. removing unnecessary steps and dependencies;
  4. designing the simplest reliable solution;
  5. measuring whether the result produces meaningful improvement.

I care about execution, ownership, clarity, and outcomes.

Collaboration

I am interested in working with engineers, maintainers, founders, and organizations developing technology that has a defensible reason to exist.

Relevant areas include:

  • developer infrastructure;
  • automation;
  • modern workplace technology;
  • public-interest technology;
  • healthcare and social-sector systems;
  • performance and reliability;
  • open-source software with measurable end-user value.

Links


Build systems that make useful work easier, faster, and more reliable.

Popular repositories Loading

  1. manvankaliber manvankaliberPublic