View Senegalion's full-sized avatar
7 followers · 7 following

Achievements

Achievement: Pull Sharkx3Achievement: QuickdrawAchievement: YOLO

Achievements

Achievement: Pull Sharkx3Achievement: QuickdrawAchievement: YOLO

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Senegalion/README.md

Hi there, I’m Łukasz (Senegalion)

Software Engineer | Cloud, DevOps & Backend | Java, Spring, Kafka, Azure, CI/CD | AI & ML | Computer Science Engineer | Karateka 🥋

About me

I am a Java Developer/DevOps and a Computer Science graduate from Lodz University of Technology. Erasmus+ alum (Metropolia UAS, Helsinki).

  • 💻 Experienced with Java 17+, Kotlin, Spring Boot, Spring Cloud, REST APIs, PostgreSQL, MongoDB, Hibernate, JUnit, Docker.
  • 🌐 Frontend skills: React, TypeScript, Tailwind CSS.
  • 🚀 CI/CD integration and microservices architecture enthusiast.
  • 🎓 Completed Harvard’s CS50x and 10+ advanced courses (Java Concurrency, Microservices, Docker, Kubernetes).
  • 🏆 HackerRank certified in Software Engineering and Problem Solving.
  • 🥋 Practicing karate for 15 years, 1st DAN black belt and sensei for 1 year.

My main projects

  • Karate Training Management System (Microservices)
    A scalable system managing karate training schedules, participants, and events using microservices architecture.

  • City Failure Predictor (Microservices)
    A microservices-based platform for reporting, monitoring, and analyzing urban incidents such as power outages, water leaks, road damage, fires, and traffic accidents.

  • Job Offers Aggregator (Modular Monolith Web App)
    Web app aggregating job offers with modular design, implemented with Java and Spring Boot.

Get in touch

Fun fact

I apply principles from Clean Code by Robert C. Martin in my development work, aiming for maintainable, efficient software.

Thanks for stopping by! 😊

Pinned Loading

  1. KarateManagementSystemKarateManagementSystemPublic

    Karate Management System – A web application for managing karate trainees, payments, and automated email reminders. Built with Spring Boot, PostgreSQL, and PayPal API. Features include user authent…

    Java 1

  2. Yehor-Kovalenko/CityFailurePredictorYehor-Kovalenko/CityFailurePredictorPublic

    Java 2

  3. JobOffersJobOffersPublic

    A Spring Boot web application that collects and processes job offers for Junior Java Developers from multiple external sources. It features REST APIs, MongoDB, Redis, Docker, and a full testing set…

    Java 3

  4. AkigatorAppAkigatorAppPublic

    Interactive web application and intelligent guessing game inspired by Akinator, where the computer asks questions to guess what you're thinking. Built using Spring Boot for the backend and React wi…

    Java 1

  5. LottoApplicationLottoApplicationPublic

    A scalable lottery draw web app built with Spring Boot, using modular monolith and hexagonal architecture. Users can submit tickets, view results, and explore draw history via a clean REST API.

    Java 2 1

  6. GitHubRepoFetcherGitHubRepoFetcherPublic

    GitHubRepoFetcher is a Spring Boot application that fetches non-forked repositories of a GitHub user, including their branches and last commit SHA, using the GitHub API.

    Java 1

, '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" + '

Skip to content
View Senegalion's full-sized avatar
7
followers
 · 7
following

Achievements
Achievement: Pull Sharkx3Achievement: QuickdrawAchievement: YOLO
Achievements
Achievement: Pull Sharkx3Achievement: QuickdrawAchievement: YOLO

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Senegalion/README.md
Hi there, I’m Łukasz (Senegalion)
Software Engineer | Cloud, DevOps & Backend | Java, Spring, Kafka, Azure, CI/CD | AI & ML | Computer Science Engineer | Karateka 🥋
About me
I am a Java Developer/DevOps and a Computer Science graduate from Lodz University of Technology.
Erasmus+ alum (Metropolia UAS, Helsinki).
  • 💻 Experienced with Java 17+, Kotlin, Spring Boot, Spring Cloud, REST APIs, PostgreSQL, MongoDB, Hibernate, JUnit, Docker.
  • 🌐 Frontend skills: React, TypeScript, Tailwind CSS.
  • 🚀 CI/CD integration and microservices architecture enthusiast.
  • 🎓 Completed Harvard’s CS50x and 10+ advanced courses (Java Concurrency, Microservices, Docker, Kubernetes).
  • 🏆 HackerRank certified in Software Engineering and Problem Solving.
  • 🥋 Practicing karate for 15 years, 1st DAN black belt and sensei for 1 year.
My main projects
  • Karate Training Management System (Microservices)
    
A scalable system managing karate training schedules, participants, and events using microservices architecture.
  • City Failure Predictor (Microservices)
    
A microservices-based platform for reporting, monitoring, and analyzing urban incidents such as power outages, water leaks, road damage, fires, and traffic accidents.
  • Job Offers Aggregator (Modular Monolith Web App)
    
Web app aggregating job offers with modular design, implemented with Java and Spring Boot.
Get in touch
Fun fact
I apply principles from Clean Code by Robert C. Martin in my development work, aiming for maintainable, efficient software.
Thanks for stopping by! 😊

Pinned
Loading
  1. KarateManagementSystemKarateManagementSystemPublic
    
Karate Management System – A web application for managing karate trainees, payments, and automated email reminders. Built with Spring Boot, PostgreSQL, and PayPal API. Features include user authent…

    Java
1

  2. Yehor-Kovalenko/CityFailurePredictorYehor-Kovalenko/CityFailurePredictorPublic
    Java
2

  3. JobOffersJobOffersPublic
    
A Spring Boot web application that collects and processes job offers for Junior Java Developers from multiple external sources. It features REST APIs, MongoDB, Redis, Docker, and a full testing set…

    Java
3

  4. AkigatorAppAkigatorAppPublic
    
Interactive web application and intelligent guessing game inspired by Akinator, where the computer asks questions to guess what you're thinking. Built using Spring Boot for the backend and React wi…

    Java
1

  5. LottoApplicationLottoApplicationPublic
    
A scalable lottery draw web app built with Spring Boot, using modular monolith and hexagonal architecture. Users can submit tickets, view results, and explore draw history via a clean REST API.

    Java
2

1

  6. GitHubRepoFetcherGitHubRepoFetcherPublic
    
GitHubRepoFetcher is a Spring Boot application that fetches non-forked repositories of a GitHub user, including their branches and last commit SHA, using the GitHub API.

    Java
1


, '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('^' + ".*" + '

Skip to content
View Senegalion's full-sized avatar
7
followers
 · 7
following

Achievements
Achievement: Pull Sharkx3Achievement: QuickdrawAchievement: YOLO
Achievements
Achievement: Pull Sharkx3Achievement: QuickdrawAchievement: YOLO

Block or report Senegalion

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Learn more about blocking users.


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Content in all repositories owned by your account will be closed.


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Senegalion/README.md
Hi there, I’m Łukasz (Senegalion)
Software Engineer | Cloud, DevOps & Backend | Java, Spring, Kafka, Azure, CI/CD | AI & ML | Computer Science Engineer | Karateka 🥋
About me
I am a Java Developer/DevOps and a Computer Science graduate from Lodz University of Technology.
Erasmus+ alum (Metropolia UAS, Helsinki).
  • 💻 Experienced with Java 17+, Kotlin, Spring Boot, Spring Cloud, REST APIs, PostgreSQL, MongoDB, Hibernate, JUnit, Docker.
  • 🌐 Frontend skills: React, TypeScript, Tailwind CSS.
  • 🚀 CI/CD integration and microservices architecture enthusiast.
  • 🎓 Completed Harvard’s CS50x and 10+ advanced courses (Java Concurrency, Microservices, Docker, Kubernetes).
  • 🏆 HackerRank certified in Software Engineering and Problem Solving.
  • 🥋 Practicing karate for 15 years, 1st DAN black belt and sensei for 1 year.
My main projects
  • Karate Training Management System (Microservices)
    
A scalable system managing karate training schedules, participants, and events using microservices architecture.
  • City Failure Predictor (Microservices)
    
A microservices-based platform for reporting, monitoring, and analyzing urban incidents such as power outages, water leaks, road damage, fires, and traffic accidents.
  • Job Offers Aggregator (Modular Monolith Web App)
    
Web app aggregating job offers with modular design, implemented with Java and Spring Boot.
Get in touch
Fun fact
I apply principles from Clean Code by Robert C. Martin in my development work, aiming for maintainable, efficient software.
Thanks for stopping by! 😊

Pinned
Loading
  1. KarateManagementSystemKarateManagementSystemPublic
    
Karate Management System – A web application for managing karate trainees, payments, and automated email reminders. Built with Spring Boot, PostgreSQL, and PayPal API. Features include user authent…

    Java
1

  2. Yehor-Kovalenko/CityFailurePredictorYehor-Kovalenko/CityFailurePredictorPublic
    Java
2

  3. JobOffersJobOffersPublic
    
A Spring Boot web application that collects and processes job offers for Junior Java Developers from multiple external sources. It features REST APIs, MongoDB, Redis, Docker, and a full testing set…

    Java
3

  4. AkigatorAppAkigatorAppPublic
    
Interactive web application and intelligent guessing game inspired by Akinator, where the computer asks questions to guess what you're thinking. Built using Spring Boot for the backend and React wi…

    Java
1

  5. LottoApplicationLottoApplicationPublic
    
A scalable lottery draw web app built with Spring Boot, using modular monolith and hexagonal architecture. Users can submit tickets, view results, and explore draw history via a clean REST API.

    Java
2

1

  6. GitHubRepoFetcherGitHubRepoFetcherPublic
    
GitHubRepoFetcher is a Spring Boot application that fetches non-forked repositories of a GitHub user, including their branches and last commit SHA, using the GitHub API.

    Java
1


, '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('^' + ".*" + '

Skip to content
View Senegalion's full-sized avatar
7
followers
 · 7
following

Achievements
Achievement: Pull Sharkx3Achievement: QuickdrawAchievement: YOLO
Achievements
Achievement: Pull Sharkx3Achievement: QuickdrawAchievement: YOLO

Block or report Senegalion

Block user

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Learn more about blocking users.


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Learn more about reporting abuse.

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Senegalion/README.md
Hi there, I’m Łukasz (Senegalion)
Software Engineer | Cloud, DevOps & Backend | Java, Spring, Kafka, Azure, CI/CD | AI & ML | Computer Science Engineer | Karateka 🥋
About me
I am a Java Developer/DevOps and a Computer Science graduate from Lodz University of Technology.
Erasmus+ alum (Metropolia UAS, Helsinki).
  • 💻 Experienced with Java 17+, Kotlin, Spring Boot, Spring Cloud, REST APIs, PostgreSQL, MongoDB, Hibernate, JUnit, Docker.
  • 🌐 Frontend skills: React, TypeScript, Tailwind CSS.
  • 🚀 CI/CD integration and microservices architecture enthusiast.
  • 🎓 Completed Harvard’s CS50x and 10+ advanced courses (Java Concurrency, Microservices, Docker, Kubernetes).
  • 🏆 HackerRank certified in Software Engineering and Problem Solving.
  • 🥋 Practicing karate for 15 years, 1st DAN black belt and sensei for 1 year.
My main projects
  • Karate Training Management System (Microservices)
    
A scalable system managing karate training schedules, participants, and events using microservices architecture.
  • City Failure Predictor (Microservices)
    
A microservices-based platform for reporting, monitoring, and analyzing urban incidents such as power outages, water leaks, road damage, fires, and traffic accidents.
  • Job Offers Aggregator (Modular Monolith Web App)
    
Web app aggregating job offers with modular design, implemented with Java and Spring Boot.
Get in touch
Fun fact
I apply principles from Clean Code by Robert C. Martin in my development work, aiming for maintainable, efficient software.
Thanks for stopping by! 😊

Pinned
Loading
  1. KarateManagementSystemKarateManagementSystemPublic
    
Karate Management System – A web application for managing karate trainees, payments, and automated email reminders. Built with Spring Boot, PostgreSQL, and PayPal API. Features include user authent…

    Java
1

  2. Yehor-Kovalenko/CityFailurePredictorYehor-Kovalenko/CityFailurePredictorPublic
    Java
2

  3. JobOffersJobOffersPublic
    
A Spring Boot web application that collects and processes job offers for Junior Java Developers from multiple external sources. It features REST APIs, MongoDB, Redis, Docker, and a full testing set…

    Java
3

  4. AkigatorAppAkigatorAppPublic
    
Interactive web application and intelligent guessing game inspired by Akinator, where the computer asks questions to guess what you're thinking. Built using Spring Boot for the backend and React wi…

    Java
1

  5. LottoApplicationLottoApplicationPublic
    
A scalable lottery draw web app built with Spring Boot, using modular monolith and hexagonal architecture. Users can submit tickets, view results, and explore draw history via a clean REST API.

    Java
2

1

  6. GitHubRepoFetcherGitHubRepoFetcherPublic
    
GitHubRepoFetcher is a Spring Boot application that fetches non-forked repositories of a GitHub user, including their branches and last commit SHA, using the GitHub API.

    Java
1


, '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" + '

Skip to content
View Senegalion's full-sized avatar
7
followers
 · 7
following

Achievements
Achievement: Pull Sharkx3Achievement: QuickdrawAchievement: YOLO
Achievements
Achievement: Pull Sharkx3Achievement: QuickdrawAchievement: YOLO

Block or report Senegalion

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Senegalion/README.md
Hi there, I’m Łukasz (Senegalion)
Software Engineer | Cloud, DevOps & Backend | Java, Spring, Kafka, Azure, CI/CD | AI & ML | Computer Science Engineer | Karateka 🥋
About me
I am a Java Developer/DevOps and a Computer Science graduate from Lodz University of Technology.
Erasmus+ alum (Metropolia UAS, Helsinki).
  • 💻 Experienced with Java 17+, Kotlin, Spring Boot, Spring Cloud, REST APIs, PostgreSQL, MongoDB, Hibernate, JUnit, Docker.
  • 🌐 Frontend skills: React, TypeScript, Tailwind CSS.
  • 🚀 CI/CD integration and microservices architecture enthusiast.
  • 🎓 Completed Harvard’s CS50x and 10+ advanced courses (Java Concurrency, Microservices, Docker, Kubernetes).
  • 🏆 HackerRank certified in Software Engineering and Problem Solving.
  • 🥋 Practicing karate for 15 years, 1st DAN black belt and sensei for 1 year.
My main projects
  • Karate Training Management System (Microservices)
    
A scalable system managing karate training schedules, participants, and events using microservices architecture.
  • City Failure Predictor (Microservices)
    
A microservices-based platform for reporting, monitoring, and analyzing urban incidents such as power outages, water leaks, road damage, fires, and traffic accidents.
  • Job Offers Aggregator (Modular Monolith Web App)
    
Web app aggregating job offers with modular design, implemented with Java and Spring Boot.
Get in touch
Fun fact
I apply principles from Clean Code by Robert C. Martin in my development work, aiming for maintainable, efficient software.
Thanks for stopping by! 😊

Pinned
Loading
  1. KarateManagementSystemKarateManagementSystemPublic
    
Karate Management System – A web application for managing karate trainees, payments, and automated email reminders. Built with Spring Boot, PostgreSQL, and PayPal API. Features include user authent…

    Java
1

  2. Yehor-Kovalenko/CityFailurePredictorYehor-Kovalenko/CityFailurePredictorPublic
    Java
2

  3. JobOffersJobOffersPublic
    
A Spring Boot web application that collects and processes job offers for Junior Java Developers from multiple external sources. It features REST APIs, MongoDB, Redis, Docker, and a full testing set…

    Java
3

  4. AkigatorAppAkigatorAppPublic
    
Interactive web application and intelligent guessing game inspired by Akinator, where the computer asks questions to guess what you're thinking. Built using Spring Boot for the backend and React wi…

    Java
1

  5. LottoApplicationLottoApplicationPublic
    
A scalable lottery draw web app built with Spring Boot, using modular monolith and hexagonal architecture. Users can submit tickets, view results, and explore draw history via a clean REST API.

    Java
2

1

  6. GitHubRepoFetcherGitHubRepoFetcherPublic
    
GitHubRepoFetcher is a Spring Boot application that fetches non-forked repositories of a GitHub user, including their branches and last commit SHA, using the GitHub API.

    Java
1


, '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
View Senegalion's full-sized avatar
7
followers
 · 7
following

Achievements
Achievement: Pull Sharkx3Achievement: QuickdrawAchievement: YOLO
Achievements
Achievement: Pull Sharkx3Achievement: QuickdrawAchievement: YOLO

Block or report Senegalion

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Learn more about blocking users.


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Learn more about reporting abuse.

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Senegalion/README.md
Hi there, I’m Łukasz (Senegalion)
Software Engineer | Cloud, DevOps & Backend | Java, Spring, Kafka, Azure, CI/CD | AI & ML | Computer Science Engineer | Karateka 🥋
About me
I am a Java Developer/DevOps and a Computer Science graduate from Lodz University of Technology.
Erasmus+ alum (Metropolia UAS, Helsinki).
  • 💻 Experienced with Java 17+, Kotlin, Spring Boot, Spring Cloud, REST APIs, PostgreSQL, MongoDB, Hibernate, JUnit, Docker.
  • 🌐 Frontend skills: React, TypeScript, Tailwind CSS.
  • 🚀 CI/CD integration and microservices architecture enthusiast.
  • 🎓 Completed Harvard’s CS50x and 10+ advanced courses (Java Concurrency, Microservices, Docker, Kubernetes).
  • 🏆 HackerRank certified in Software Engineering and Problem Solving.
  • 🥋 Practicing karate for 15 years, 1st DAN black belt and sensei for 1 year.
My main projects
  • Karate Training Management System (Microservices)
    
A scalable system managing karate training schedules, participants, and events using microservices architecture.
  • City Failure Predictor (Microservices)
    
A microservices-based platform for reporting, monitoring, and analyzing urban incidents such as power outages, water leaks, road damage, fires, and traffic accidents.
  • Job Offers Aggregator (Modular Monolith Web App)
    
Web app aggregating job offers with modular design, implemented with Java and Spring Boot.
Get in touch
Fun fact
I apply principles from Clean Code by Robert C. Martin in my development work, aiming for maintainable, efficient software.
Thanks for stopping by! 😊

Pinned
Loading
  1. KarateManagementSystemKarateManagementSystemPublic
    
Karate Management System – A web application for managing karate trainees, payments, and automated email reminders. Built with Spring Boot, PostgreSQL, and PayPal API. Features include user authent…

    Java
1

  2. Yehor-Kovalenko/CityFailurePredictorYehor-Kovalenko/CityFailurePredictorPublic
    Java
2

  3. JobOffersJobOffersPublic
    
A Spring Boot web application that collects and processes job offers for Junior Java Developers from multiple external sources. It features REST APIs, MongoDB, Redis, Docker, and a full testing set…

    Java
3

  4. AkigatorAppAkigatorAppPublic
    
Interactive web application and intelligent guessing game inspired by Akinator, where the computer asks questions to guess what you're thinking. Built using Spring Boot for the backend and React wi…

    Java
1

  5. LottoApplicationLottoApplicationPublic
    
A scalable lottery draw web app built with Spring Boot, using modular monolith and hexagonal architecture. Users can submit tickets, view results, and explore draw history via a clean REST API.

    Java
2

1

  6. GitHubRepoFetcherGitHubRepoFetcherPublic
    
GitHubRepoFetcher is a Spring Boot application that fetches non-forked repositories of a GitHub user, including their branches and last commit SHA, using the GitHub API.

    Java
1


, '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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7
followers
 · 7
following

Achievements
Achievement: Pull Sharkx3Achievement: QuickdrawAchievement: YOLO
Achievements
Achievement: Pull Sharkx3Achievement: QuickdrawAchievement: YOLO

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Senegalion/README.md
Hi there, I’m Łukasz (Senegalion)
Software Engineer | Cloud, DevOps & Backend | Java, Spring, Kafka, Azure, CI/CD | AI & ML | Computer Science Engineer | Karateka 🥋
About me
I am a Java Developer/DevOps and a Computer Science graduate from Lodz University of Technology.
Erasmus+ alum (Metropolia UAS, Helsinki).
  • 💻 Experienced with Java 17+, Kotlin, Spring Boot, Spring Cloud, REST APIs, PostgreSQL, MongoDB, Hibernate, JUnit, Docker.
  • 🌐 Frontend skills: React, TypeScript, Tailwind CSS.
  • 🚀 CI/CD integration and microservices architecture enthusiast.
  • 🎓 Completed Harvard’s CS50x and 10+ advanced courses (Java Concurrency, Microservices, Docker, Kubernetes).
  • 🏆 HackerRank certified in Software Engineering and Problem Solving.
  • 🥋 Practicing karate for 15 years, 1st DAN black belt and sensei for 1 year.
My main projects
  • Karate Training Management System (Microservices)
    
A scalable system managing karate training schedules, participants, and events using microservices architecture.
  • City Failure Predictor (Microservices)
    
A microservices-based platform for reporting, monitoring, and analyzing urban incidents such as power outages, water leaks, road damage, fires, and traffic accidents.
  • Job Offers Aggregator (Modular Monolith Web App)
    
Web app aggregating job offers with modular design, implemented with Java and Spring Boot.
Get in touch
Fun fact
I apply principles from Clean Code by Robert C. Martin in my development work, aiming for maintainable, efficient software.
Thanks for stopping by! 😊

Pinned
Loading
  1. KarateManagementSystemKarateManagementSystemPublic
    
Karate Management System – A web application for managing karate trainees, payments, and automated email reminders. Built with Spring Boot, PostgreSQL, and PayPal API. Features include user authent…

    Java
1

  2. Yehor-Kovalenko/CityFailurePredictorYehor-Kovalenko/CityFailurePredictorPublic
    Java
2

  3. JobOffersJobOffersPublic
    
A Spring Boot web application that collects and processes job offers for Junior Java Developers from multiple external sources. It features REST APIs, MongoDB, Redis, Docker, and a full testing set…

    Java
3

  4. AkigatorAppAkigatorAppPublic
    
Interactive web application and intelligent guessing game inspired by Akinator, where the computer asks questions to guess what you're thinking. Built using Spring Boot for the backend and React wi…

    Java
1

  5. LottoApplicationLottoApplicationPublic
    
A scalable lottery draw web app built with Spring Boot, using modular monolith and hexagonal architecture. Users can submit tickets, view results, and explore draw history via a clean REST API.

    Java
2

1

  6. GitHubRepoFetcherGitHubRepoFetcherPublic
    
GitHubRepoFetcher is a Spring Boot application that fetches non-forked repositories of a GitHub user, including their branches and last commit SHA, using the GitHub API.

    Java
1


, '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); }
})();
})();

Skip to content
View Senegalion's full-sized avatar
7
followers
 · 7
following

Achievements
Achievement: Pull Sharkx3Achievement: QuickdrawAchievement: YOLO
Achievements
Achievement: Pull Sharkx3Achievement: QuickdrawAchievement: YOLO

Block or report Senegalion

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Learn more about blocking users.


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Senegalion/README.md
Hi there, I’m Łukasz (Senegalion)
Software Engineer | Cloud, DevOps & Backend | Java, Spring, Kafka, Azure, CI/CD | AI & ML | Computer Science Engineer | Karateka 🥋
About me
I am a Java Developer/DevOps and a Computer Science graduate from Lodz University of Technology.
Erasmus+ alum (Metropolia UAS, Helsinki).
  • 💻 Experienced with Java 17+, Kotlin, Spring Boot, Spring Cloud, REST APIs, PostgreSQL, MongoDB, Hibernate, JUnit, Docker.
  • 🌐 Frontend skills: React, TypeScript, Tailwind CSS.
  • 🚀 CI/CD integration and microservices architecture enthusiast.
  • 🎓 Completed Harvard’s CS50x and 10+ advanced courses (Java Concurrency, Microservices, Docker, Kubernetes).
  • 🏆 HackerRank certified in Software Engineering and Problem Solving.
  • 🥋 Practicing karate for 15 years, 1st DAN black belt and sensei for 1 year.
My main projects
  • Karate Training Management System (Microservices)
    
A scalable system managing karate training schedules, participants, and events using microservices architecture.
  • City Failure Predictor (Microservices)
    
A microservices-based platform for reporting, monitoring, and analyzing urban incidents such as power outages, water leaks, road damage, fires, and traffic accidents.
  • Job Offers Aggregator (Modular Monolith Web App)
    
Web app aggregating job offers with modular design, implemented with Java and Spring Boot.
Get in touch
Fun fact
I apply principles from Clean Code by Robert C. Martin in my development work, aiming for maintainable, efficient software.
Thanks for stopping by! 😊

Pinned
Loading
  1. KarateManagementSystemKarateManagementSystemPublic
    
Karate Management System – A web application for managing karate trainees, payments, and automated email reminders. Built with Spring Boot, PostgreSQL, and PayPal API. Features include user authent…

    Java
1

  2. Yehor-Kovalenko/CityFailurePredictorYehor-Kovalenko/CityFailurePredictorPublic
    Java
2

  3. JobOffersJobOffersPublic
    
A Spring Boot web application that collects and processes job offers for Junior Java Developers from multiple external sources. It features REST APIs, MongoDB, Redis, Docker, and a full testing set…

    Java
3

  4. AkigatorAppAkigatorAppPublic
    
Interactive web application and intelligent guessing game inspired by Akinator, where the computer asks questions to guess what you're thinking. Built using Spring Boot for the backend and React wi…

    Java
1

  5. LottoApplicationLottoApplicationPublic
    
A scalable lottery draw web app built with Spring Boot, using modular monolith and hexagonal architecture. Users can submit tickets, view results, and explore draw history via a clean REST API.

    Java
2

1

  6. GitHubRepoFetcherGitHubRepoFetcherPublic
    
GitHubRepoFetcher is a Spring Boot application that fetches non-forked repositories of a GitHub user, including their branches and last commit SHA, using the GitHub API.

    Java
1