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I am specialized in Java Spring Boot backend systems and JavaFX/Swing desktop applications. I have delivered 10+ projects for startups and small businesses, improving system performance, stability, and overall code quality while building user-friendly interfaces that teams actually enjoy using - ultimately reducing their daily workload and simplifying complex processes. My Technical Expertise: ------------------------ - Backend: Spring Boot, REST APIs, MySQL, Hibernate, Spring Security, GraphQL - Desktop: JavaFX, Swing with modern UI design principles - Frontend: React JS, Angular for full-stack projects when needed - Tools: Git, Postman, IntelliJ IDEA, Insomnia What I've Built: ------------------ - REST APIs for e-commerce platforms - Desktop apps to manage inventory easily - Blog websites with secure login and user access - Tools to show data in charts and graphs, that helped clients identify cost savings Why clients choose me: ---------------------------- I connect complex backend systems with easy-to-use interfaces. I write clean, well-organized code that’s easy to maintain later, not just quick fixes. I also explain timelines and possible issues clearly from the start. Perfect fit if you need: -------------------------- A Spring Boot API that won't break under load, a desktop application that looks modern (not like it's from 2005), or reliable maintenance for existing Java systems. Ready to discuss your project? Message me with your specific requirements and I'll outline exactly how I'd approach it.

Highly accomplished Software Architect and Machine Learning Engineer with a solid mathematical background and 20+ years of experience. I specialize in bridging the gap between complex algorithmic research and high-performance system execution. My unique expertise combines advanced AI/ML development with a deep background in compiler design, domain-specific languages (DSLs), and low-level code optimization. Whether you need to develop production-grade ML models, optimize heavy computing algorithms, or build specialized software tools and custom IDEs, I deliver mathematically sound and architecturally robust solutions. 🧠 Core Expertise Machine Learning & Research: Algorithm development, statistical data processing, predictive modeling, and AI logic orchestration. Strong scientific and analytical background with proven experience in research and academic article writing. Compilers & DSL Engineering: Expert in the theory of formal languages, syntax analysis, parsers, and custom compilers. Prototyping and implementing Domain-Specific Languages (DSLs) tailored for specific business or technical domains. High-Performance & Optimization: Optimization of complex calculations, data structures, and database architectures for high-throughput systems. Full-Cycle Infrastructure: Designing client-server systems for massive data storage, visualization of observation results, and custom developer tools (Eclipse RCP/Xtext/Plugin development). TECHNICAL SKILLS SUMMARY 🤖 Machine Learning & Mathematics Algorithms & Math: Advanced Mathematics, Algorithm Design & Optimization, Statistical Analysis, Data Visualization. AI Logic: Neural Network integration, Data Processing pipelines, Game AI & Logic engines. Research: Scientific research, Data insights, Technical writing, and Academic publication standards. 🛠️ Compiler & DSL Development Formal Languages: Syntax Analysis, Parser Generation, AST Manipulation. Tools & Frameworks: Xtext, Xtend, ANTLR. IDE Development: Eclipse RCP, SWT/JFace, Custom Plugin Development. ☕ Enterprise Java & Backend Infrastructure Core Java: Java SE (High Performance), Java Reflection, Sockets/Networking. Frameworks: Spring (Core, MVC, AOP), Hibernate, JDBC. Data Processing: SAX, DOM, XSLT, Jasper Reports. Databases: PostgreSQL, MySQL. 📱 Legacy & Specialized Experience Desktop/Web UI: Swing, GWT, GXT. Cross-Platform & Graphics: LibGDX (Game engines/logic). Legacy Stack (ActionScript/Flex): Flex 4.6, ActionScript 3.0, Adobe AIR, Flash Media Server, PureMVC (valuable for legacy system migration). ⚙️ Tools & Workflow IDEs: IntelliJ IDEA, Eclipse. Build & Version Control: Maven, GIT, SVN. Architecture: Gang of Four (GoF) Design Patterns, Clean Architecture.

I’m a Senior Software Engineer with over 4 years of experience delivering secure, scalable, and high-performance software solutions for startups, SMEs, and enterprises across industries such as e-commerce, fintech, blockchain, edtech, and food & beverage. My core focus is on backend development, API engineering, cloud-native applications, workflow automation, and AI-powered solutions, but I also bring full-stack expertise to deliver complete, production-ready systems. I hold a Bachelor’s degree in Computer Science and specialize in building robust, maintainable, and efficient backend architectures using Java, Spring Boot, Node.js, and TypeScript, integrated with high-performance databases like PostgreSQL, MySQL, MongoDB, and Redis. I’m highly skilled in RESTful API development, microservices architecture, asynchronous processing, and secure authentication (JWT, OAuth2, SSO). Core Technical Skills: Backend Development: Java, Spring Boot, Spring MVC, Jakarta EE, JavaFX, Node.js, Express.js, Python, Golang Frontend Development: React, Angular, Next.js, Thymeleaf, JSP/JSTL, Bootstrap, HTML5, CSS3, JavaScript, jQuery Databases: MySQL, PostgreSQL, MongoDB, Redis (NoSQL & SQL database design, query optimization, indexing, caching) Cloud & DevOps: AWS (EC2, S3, RDS, Lambda), Google Cloud Platform (GCP), Microsoft Azure, Docker, Kubernetes, CI/CD pipelines Messaging & Integration: RabbitMQ, Kafka, WebSockets, API Gateway integrations, GraphQL Automation & AI: n8n, Make (Integromat), Apify, PhantomBuster, OpenAI API, AI model integration, workflow orchestration Version Control & Collaboration: Git, GitHub, GitLab, Bitbucket, Agile/Scrum methodologies Achievements & Project Highlights: ✔ Built an e-commerce platform capable of handling 500+ daily transactions, reducing load times by 30% and lowering infrastructure costs by 15% through database optimization and caching strategies. ✔ Led a cloud migration project from legacy infrastructure to AWS, reducing operational costs by 25% while improving scalability and uptime. ✔ Developed an AI-powered study assistant for neurodivergent students, winning the AI for Social Good hackathon and improving engagement and retention rates. ✔ Created a data automation pipeline that processed and scored 1,300+ startup applications for Pitch2Win, enabling quick finalist selection and improving investor matching efficiency. ✔ Engineered a grant-winning platform for Babcock University’s community health project, helping secure $80K in funding. What I Bring to Your Project: ✔ Expert in API-first development, secure authentication, and microservices architecture ✔ Strong track record with data enrichment, web scraping, and workflow automation tools like n8n and Apify ✔ Proven ability to design cloud-native, fault-tolerant, and cost-optimized applications ✔ Deep experience in AI integration for lead generation, data analysis, and personalized user experiences ✔ Commitment to clear communication, on-time delivery, and scalable, future-proof code If you’re looking for a results-driven software engineer who can handle everything from custom backend architecture to AI-driven automation systems, I’d love to collaborate. Let’s discuss how I can turn your requirements into a solution that’s efficient, secure, and built for growth.

I help businesses ship bug-free, high-performance applications by combining strong 𝗤𝗔 𝘁𝗲𝘀𝘁𝗶𝗻𝗴 𝘄𝗶𝘁𝗵 𝗳𝘂𝗹𝗹-𝘀𝘁𝗮𝗰𝗸 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲. With 8+ years of hands-on experience, I specialize in 𝗺𝗮𝗻𝘂𝗮𝗹 𝘁𝗲𝘀𝘁𝗶𝗻𝗴, 𝗳𝘂𝗻𝗰𝘁𝗶𝗼𝗻𝗮𝗹 𝘁𝗲𝘀𝘁𝗶𝗻𝗴, 𝘂𝘀𝗮𝗯𝗶𝗹𝗶𝘁𝘆 𝘁𝗲𝘀𝘁𝗶𝗻𝗴, 𝗮𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻, 𝗮𝗻𝗱 𝗲𝗻𝗱-𝘁𝗼-𝗲𝗻𝗱 𝗦𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝗤𝗔 for web, mobile, SaaS, and AI-based applications. 🔍 𝗤𝗔 𝗧𝗲𝘀𝘁𝗶𝗻𝗴 & 𝗤𝘂𝗮𝗹𝗶𝘁𝘆 𝗔𝘀𝘀𝘂𝗿𝗮𝗻𝗰𝗲 ========================= 1. Manual Testing (Web, Mobile, SaaS) 2. Functional, Regression & UAT Testing 3. API Testing (REST, GraphQL, SOAP) 4. Cross-browser & Cross-device testing 5. Bug reporting with clear reproduction steps ⚙️ 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻 & 𝗣𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲 ========================= * Selenium, Cypress, Appium, WebDriverIO * TestNG, Cucumber (BDD) * Performance Testing (JMeter, Locust) * CI/CD Integration (Jenkins, GitHub Actions) 📱 𝗠𝗼𝗯𝗶𝗹𝗲 & 𝗔𝗜 𝗔𝗽𝗽 𝗧𝗲𝘀𝘁𝗶𝗻𝗴 ========================= * iOS & Android testing * AI/LLM app testing (output validation, edge cases) * Usability & flow testing --- 🛠 𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸 ================ **Languages:** Java, Python, JavaScript **Frontend:** React, Next.js, Angular, HTML, CSS **Backend:** Spring Boot, Node.js **Tools:** Postman, Jira, TestRail, BrowserStack, Git **Cloud:** AWS, Azure, Docker **Database:** MySQL, MongoDB --- 🚀 𝗪𝗵𝘆 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗛𝗶𝗿𝗲 𝗠𝗲 ================ * Clear, structured bug reports (no guesswork for devs) * Strong attention to detail * Fast turnaround and reliable communication * Focus on real-world usability, not just test cases -------------------- 📌 Keywords (for Upwork Search) QA Testing, Manual Testing, Automation Testing, Selenium, Cypress, Appium, API Testing, Performance Testing, Mobile App Testing, Web Testing, SaaS Testing, AI App Testing, Bug Tracking, Regression Testing, UAT, QA Engineer, Manual Testing, Functional Testing, Usability Testing, Software QA -------------------- If you need someone who can find issues before your users do and improve product quality, I’m ready to help 👍

Whether you need to revive a legacy system without breaking its core logic or build it from scratch, and it has to be stable under tough conditions, I provide the technical reliability your project requires. Clients come to me when they need software that “just works” in demanding scenarios: industrial control, fleet/corporate tracking, self-service kiosks, field sales tools, or data-heavy enterprise sync. I prioritize solutions that reduce operational headaches, improve user experience, and scale without constant fixes. I write code designed to be maintained by others. My goal is for your team to be able to take over the project in the future without having to decipher complex logic or deal with accumulated technical debt. If you have a system causing operational friction or a project that requires a stable foundation from day one, feel free to reach out. We can discuss your current architecture and determine the most efficient path to stabilize or scale your solution. ===What I can do for you=== * Modernize old Android or desktop applications: migrate code to modern languages and architectures, improve performance, add offline support, handle complex local storage with safe migrations, and make synchronization with backends more robust and fault-tolerant. * Build responsive, hardware-connected apps: implement asynchronous communication, custom UI components for touch or specialized interfaces, background services (location, monitoring, telemetry), power-efficient processing, and permissions handling across Android versions. * Create reliable integration middleware or connectors: design asynchronous layers for heavy data transfers between local databases, APIs, or accounting/enterprise systems, with strong validation, logging, error recovery, and minimal downtime. * Ensure apps stay responsive and safe: use multi-threading, coroutines/Flow/reactive patterns, state machines, and safeguards to prevent crashes, race conditions, or hardware issues—even during intensive I/O, real-time updates, or long-running operations. === Technical Toolkit === * Languages: Kotlin, C#, Java * Android: Jetpack Compose, Coroutines, Flow, Room, Koin/Hilt, WorkManager. * Desktop: JavaFX, Swing, WPF, Avalonia. * Architecture & Patterns: SOLID, MVVM, Reactive Programming, Concurrency, Asynchronous I/O. * Integrations: Serial Communication (CNC/HID), SOAP/REST, SQLite, SQL Server, ERP Connectors.

𝐍𝐞𝐞𝐝 𝐚 𝐝𝐞𝐬𝐤𝐭𝐨𝐩 𝐚𝐩𝐩 𝐛𝐮𝐢𝐥𝐭, 𝐬𝐢𝐠𝐧𝐞𝐝, 𝐧𝐨𝐭𝐚𝐫𝐢𝐳𝐞𝐝, 𝐚𝐧𝐝 𝐩𝐚𝐜𝐤𝐚𝐠𝐞𝐝 𝐢𝐧𝐭𝐨 𝐚 𝐩𝐫𝐨𝐟𝐞𝐬𝐬𝐢𝐨𝐧𝐚𝐥 𝐢𝐧𝐬𝐭𝐚𝐥𝐥𝐞𝐫 𝐰𝐢𝐭𝐡 𝐚𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐜 𝐮𝐩𝐝𝐚𝐭𝐞𝐬 ? 𝐓𝐡𝐚𝐭 𝐢𝐬 𝐦𝐲 𝐬𝐩𝐞𝐜𝐢𝐚𝐥𝐭𝐲. I build desktop apps from scratch and fix last-mile release problems that keep teams from shipping. Most clients come to me after days lost to Apple notarization, Windows code-signing, or cross-platform build failures. I diagnose it, fix it, and ship it, then leave documentation so your team can build independently. I also package desktop application plugins into easy-to-install desktop app extensions 60+ projects. 100% Job Success Score. Many clients return for 5+ continuous contracts. 𝐖𝐇𝐀𝐓 𝐈 𝐃𝐎: • Build full desktop apps from architecture to installable product • macOS code signing and notarization (Developer ID, Gatekeeper, stapling) • Branded Windows and macOS installers (WiX, Inno Setup, Advanced Installer, PKG, DMG) • Electron packaging, signing, and feature work (Electron Forge and electron-builder) • Legacy Java deployment rescue (Tomcat, Maven, Launch4J) Built with Java, JavaFX, Electron JS, and Spring Boot. Past work includes camera control software, audio workstations, AI assistants, DeFi GUIs, and file management systems. Most packaging projects ship in days, not weeks. Message me with your build error, where you are stuck, or app idea. I usually reply within a few minutes.