Youcef Debbah Email & Phone Number

Staoueli, Algiers, Algeria

I have contributed to several projects at Nexatech, leveraging a wide range of technologies including native Android development (Java/Kotlin), modern mobile development with Compose Multiplatform, and backend development using Spring (REST/GraphQL). My responsibilities encompassed implementing new features, optimizing performance, and migrating legacy codebases.🏆 𝗡𝗢𝗧𝗔𝗕𝗟𝗘 𝗔𝗖𝗛𝗜𝗘𝗩𝗘𝗠𝗘𝗡𝗧𝗦 𝗔𝗖𝗥𝗢𝗦𝗦 𝗔𝗟𝗟 𝗣𝗥𝗢𝗝𝗘𝗖𝗧𝗦 🏆✅ Implemented an efficient in-memory… Show more I have contributed to several projects at Nexatech, leveraging a wide range of technologies including native Android development (Java/Kotlin), modern mobile development with Compose Multiplatform, and backend development using Spring (REST/GraphQL). My responsibilities encompassed implementing new features, optimizing performance, and migrating legacy codebases.🏆 𝗡𝗢𝗧𝗔𝗕𝗟𝗘 𝗔𝗖𝗛𝗜𝗘𝗩𝗘𝗠𝗘𝗡𝗧𝗦 𝗔𝗖𝗥𝗢𝗦𝗦 𝗔𝗟𝗟 𝗣𝗥𝗢𝗝𝗘𝗖𝗧𝗦 🏆✅ Implemented an efficient in-memory cache that achieved 72.4% higher throughput with similar latency compared to “ConcurrentSkipListMap”.✅ Reduced the app bundle size of an Android app (Reporter PDF Maker) by 43% (from 40 MB to 28.3 MB) by performing meticulous tuning (to ProGuard rules) that is guided by in-depth code analysis.✅ Migrated a sizeable legacy codebase (89 KLOC) from Java locks API to Kotlin Coroutines in just one week, implementing a custom ReadWrite Mutex.✅ Identified and resolved multiple bottlenecks and memory leaks using Firebase Performance Monitoring, JMH benchmarks, and live profiling.𝘊𝘩𝘦𝘤𝘬 𝘰𝘶𝘵 𝘵𝘩𝘦 "𝘗𝘳𝘰𝘫𝘦𝘤𝘵𝘴 𝘴𝘦𝘤𝘵𝘪𝘰𝘯" 𝘧𝘰𝘳 𝘮𝘰𝘳𝘦 𝘥𝘦𝘵𝘢𝘪𝘭𝘴 𝘰𝘯 𝘦𝘢𝘤𝘩 𝘱𝘳𝘰𝘫𝘦𝘤𝘵! Show less

I founded a start-up and served as both the manager and the main Android developer. Our main product was a mobile app that keeps users updated on the real-time status of waiting queues at Algerian Post Offices, the users can receive a push notification or an SMS when their turn approaches. All in all, I was the glue that held together my amazing teammates in the face of hostile bureaucrats amidst legal and financial challenges.🏆 𝗡𝗢𝗧𝗔𝗕𝗟𝗘 𝗔𝗖𝗛𝗜𝗘𝗩𝗘𝗠𝗘𝗡𝗧𝗦 🏆✅… Show more I founded a start-up and served as both the manager and the main Android developer. Our main product was a mobile app that keeps users updated on the real-time status of waiting queues at Algerian Post Offices, the users can receive a push notification or an SMS when their turn approaches. All in all, I was the glue that held together my amazing teammates in the face of hostile bureaucrats amidst legal and financial challenges.🏆 𝗡𝗢𝗧𝗔𝗕𝗟𝗘 𝗔𝗖𝗛𝗜𝗘𝗩𝗘𝗠𝗘𝗡𝗧𝗦 🏆✅ 𝗠𝘂𝗹𝘁𝗶-𝘁𝗮𝘀𝗸𝗶𝗻𝗴: Founded my own startup, serving as both the manager and a developer. Consistently contributed to product design and software development while overseeing daily operations and resolving emerging disruptions.✅ 𝗣𝗲𝗿𝘀𝗲𝘃𝗲𝗿𝗮𝗻𝗰𝗲: Despite my team management duties, I consistently wrote code while adeptly leading a team of five talented individuals amidst an unfair legal dispute.✅ 𝗠𝗲𝗻𝘁𝗼𝗿𝗶𝗻𝗴 𝗻𝗲𝘄 𝗵𝗶𝗿𝗲𝘀: Hired two fresh graduates and mentored them as junior developers. Taught them about advanced algorithms and data structures, performance optimization, and handling memory leaks. Show less

Tlemcen, Algeria

I served as a Platoon Leader in the Logistics Corps during my military service in the Algerian National Army. Despite the challenges posed by the COVID-19 pandemic, I demonstrated a strong work ethic, sound decision-making, and an innovative sense of workflow optimization.🏆 𝗡𝗢𝗧𝗔𝗕𝗟𝗘 𝗔𝗖𝗛𝗜𝗘𝗩𝗘𝗠𝗘𝗡𝗧𝗦 🏆✅ Consolidated a dozen MS Excel docs into a Java Swing app for efficient HR management at the HQ (3,500+ military personnel across 24 units).✅ Planned and executed 2… Show more I served as a Platoon Leader in the Logistics Corps during my military service in the Algerian National Army. Despite the challenges posed by the COVID-19 pandemic, I demonstrated a strong work ethic, sound decision-making, and an innovative sense of workflow optimization.🏆 𝗡𝗢𝗧𝗔𝗕𝗟𝗘 𝗔𝗖𝗛𝗜𝗘𝗩𝗘𝗠𝗘𝗡𝗧𝗦 🏆✅ Consolidated a dozen MS Excel docs into a Java Swing app for efficient HR management at the HQ (3,500+ military personnel across 24 units).✅ Planned and executed 2 emergency response drills, which prepared me to lead my platoon as the first on the scene during a real-world emergency when the residence of the unit commander caught fire. Show less

Bejaïa, Algeria

I joined Ngnex-Soft as a contractor and independently developed a web application prototype for a challenging client. Upon client approval of the prototype, I was promoted to a full-time Java EE Software Developer. Collaborating with senior developers at Ngnex-Soft, I optimized and prepared the prototype for production. I maintained the application as it scaled to serve thousands of users and also contributed to migrating several other projects to enhance stability and reduce hosting… Show more I joined Ngnex-Soft as a contractor and independently developed a web application prototype for a challenging client. Upon client approval of the prototype, I was promoted to a full-time Java EE Software Developer. Collaborating with senior developers at Ngnex-Soft, I optimized and prepared the prototype for production. I maintained the application as it scaled to serve thousands of users and also contributed to migrating several other projects to enhance stability and reduce hosting costs.🏆 𝗡𝗢𝗧𝗔𝗕𝗟𝗘 𝗔𝗖𝗛𝗜𝗘𝗩𝗘𝗠𝗘𝗡𝗧𝗦 🏆✅ Developed a web app prototype independently and applied significant optimizations to reduce its average response time from 3.4 sec to 250 ms.✅ Led the migration of a legacy web app from Oracle Database and Payara server to MySQL and WildFly, achieving a 34% reduction in hosting expenses.✅ Got promoted 2 times in less than one year after driving substantial business growth through strategic planning and technical problem-solving. Show less

As a fresh graduate, I began my career as a freelancer. I undertook two website projects, building the first from scratch and utilizing a similar template for the second. While the websites were relatively basic, I employed Java EE for their implementation to gain practical experience with enterprise-grade technologies.🏆 𝗡𝗢𝗧𝗔𝗕𝗟𝗘 𝗔𝗖𝗛𝗜𝗘𝗩𝗘𝗠𝗘𝗡𝗧𝗦 🏆✅ Created an original UI design using basic HTML/CSS (without any CSS frameworks), giving the plain JSF components a… Show more As a fresh graduate, I began my career as a freelancer. I undertook two website projects, building the first from scratch and utilizing a similar template for the second. While the websites were relatively basic, I employed Java EE for their implementation to gain practical experience with enterprise-grade technologies.🏆 𝗡𝗢𝗧𝗔𝗕𝗟𝗘 𝗔𝗖𝗛𝗜𝗘𝗩𝗘𝗠𝗘𝗡𝗧𝗦 🏆✅ Created an original UI design using basic HTML/CSS (without any CSS frameworks), giving the plain JSF components a fresh and elegant look.✅ Employed many best practices in modern software development, including clean architecture, proper software testing, adherence to HTML5 standards, and support for multiple UI languages. Show less