Over the years, I’ve worked with both startups and enterprises to turn complex ideas into reliable, production-ready platforms. My focus is on creating backend architectures that are efficient, maintainable, and built for long-term growth. • Tools I can use when delivering your project ✍🏻 Programming Languages: Java, Python, C++, JavaScript, Dart 🛠️ Backend Frameworks: Spring boot, JakartaEE, Django, FastAPI, Flask 🎨 Frontend Frameworks: React JS, Next JS, Flutter 🛢 Database Management & Cache: MySQL, Supabase, PostgreSQL, MongoDB, SQLite, Redis 🗃️ Event Streaming: Kafka, RabbitMQ 🛡️ Security & Secrets Management: KeyCloak, JWT, HashiCorp ⚙️Automation Management & BPMN: Camunda, N8N 📊 Observability: Grafana, Loki, Kibana, Prometheus 🏗️ System Architectures: Monolithic, MVC, Microservices, Event-driven • Key Highlights - At Crewpr, a Dubai-based startup available on the App Store and Google Play, I served as the first backend engineer. I designed and launched the platform’s entire backend, from architecture to production, delivering a reliable MVP that now serves over 500 active users. - I contributed to Yugo, a large-scale student accommodation platform serving users across Europe, where I enhanced scalability, optimized backend performance, and ensured smooth multi-region operations. - I also collaborated on several governmental digital transformation projects in Ireland, including Enterprise Ireland, NEH, and Startup Ireland, delivering secure, stable, and scalable backend systems that support thousands of daily users. ✨ I believe in clarity, precision, and engineering excellence. Every system I build follows clean architecture principles as OO, SOLID and Design patterns.

Over 15 years of experience as a software developer, with a strong background in Java and Angular. Proven track record of delivering high-quality web applications on time and within budget. Skilled in working collaboratively in fast-paced, team-oriented environments. Proficient in a variety of development tools, including, Visual Studio, IntelliJ, and Git. Utilize AI-assisted development tools such as OpenCode and ClaudeCode to expedite coding and enhance efficiency. Tech Stack: ✅ Java ✅ Springboot ✅ Angular ✅ React Native ✅ Postgres / Mysql ✅ Typescript ✅ Unit testing / TDD / Spock / JUnit / Jasmine ✅ HTML ✅ CSS ✅ Git ✅ Open Code, Claude Code I can: ✅ Create custom complex websites ✅ Make mobile apps ✅ Automate boring tasks ✅ Create scripts for everyday use ✅ Optimize slow queries

I architect and engineer high-performance SaaS platforms, enterprise REST APIs, and intelligent automation workflows. With 6+ years of professional software engineering experience and over 130 successfully delivered projects, I specialize in bridging the gap between complex, heavy-duty backend infrastructure and seamless, high-converting user experiences. I don't just write code; I partner with businesses to build scalable, secure, and easily maintainable digital products. ► What I Build: Enterprise SaaS Platforms: End-to-end development including multi-tenant architecture, secure payment gateways (Stripe/Paddle), and subscription management. High-Traffic APIs & Backend Systems: Designing RESTful APIs capable of handling millions of daily requests with sub-100ms latency, robust authentication, and fault tolerance. AI & Workflow Automation: Integrating intelligent AI APIs (voice, communication, and routing) and custom automation solutions to streamline complex business processes. High-Performance Frontends: Building responsive, modern Single Page Applications (SPAs) focused on flawless Core Web Vitals, fast load times, and intuitive UI/UX. ► Core Tech Stack: Backend: Java, Spring Boot, Microservices, REST APIs Frontend: Angular, TypeScript, JavaScript, HTML5/CSS3 Cloud & Database: AWS, Docker, PostgreSQL, MySQL Optimization: Technical SEO, PageSpeed enhancement, GSAP animations ► The Consultant Difference: High-value projects require more than just technical skills. When you work with me, you get a product-minded engineer who prioritizes clean architecture, systematic code reviews, and transparent communication. I treat your infrastructure with the same rigor that allowed me to maintain 99.9% uptime SLAs for global enterprise clients. Whether you are a startup needing a custom platform built from scratch, or an established business seeking to optimize your architecture and automate workflows, let's connect. Send me a message with a brief overview of your project, and we can discuss the best technical roadmap to bring your vision to life.

I help companies build software that is difficult to build. With 20+ years of hands-on engineering experience—including CTO and Head of Engineering roles—I design, build, modernize, and scale complex software products. I've worked with startups, fast-growing SaaS companies, trading firms, and enterprise organizations, leading projects from idea to production. My experience includes AI-powered applications, trading and fintech platforms, SaaS products, cloud-native systems, backend architecture, automation, and engineering leadership. I still write production code every day and enjoy solving challenging technical problems. Whether you need an MVP, a production-ready platform, AI integration, system modernization, performance optimization, or technical leadership, I can take ownership of the entire engineering process—from architecture and implementation to delivery. Core expertise: • AI Agents, LLMs & Automation • Trading & FinTech Systems (FIX, Market Data, Risk) • SaaS Platforms & Cloud Architecture • Java, Python, Node.js, TypeScript • AWS, Docker, Kubernetes, PostgreSQL • CTO / Fractional CTO / Engineering Leadership I prefer long-term partnerships where I can make a measurable technical and business impact.

Clients work with me when they need someone who understands both engineering depth and business impact and can design systems that scale, stay stable and reduce operational overhead. I’m a Solutions Architect, Data Engineer and Backend Developer with 14+ years of experience building scalable data platforms and production grade backend systems for Ecommerce, Fintech, SaaS and Healthcare companies. I help businesses solve complex data and backend problems by designing systems that are reliable, secure and built for real world scale. From data ingestion to APIs and cloud deployment, I focus on clean architecture, automation and long term maintainability rather than quick fixes. My core expertise covers end-to-end data pipelines, backend services and cloud infrastructure using Python, Java, SQL and modern cloud platforms. I design ETL workflows, APIs and distributed systems that handle high volume data, background processing and integrations with confidence. On the data side, I build automated pipelines that extract, clean, validate and deliver analytics-ready data to warehouses, dashboards and APIs. On the backend side, I design API first systems, microservices and integrations that power products reliably under load. What I work on: • Data Engineering & ETL Pipelines (Python, Pandas, PySpark, SQL) • Backend Development & APIs (Python, Java, FastAPI, Django, Flask) • Cloud Architecture & Deployments (AWS, GCP, Azure) • Data Warehousing & Analytics (Redshift, BigQuery, Snowflake) • Workflow Orchestration & Automation (Apache Airflow) • Web Scraping & Data Extraction (Scrapy, Selenium, APIs) • Distributed Systems, Async Processing & Messaging • Database Design & Performance Optimization • Docker, Kubernetes, CI/CD and production deployments If you’re looking for a senior engineer who can own data pipelines, backend architecture and cloud infrastructure end to end, let’s talk.

Technically minded professional with extensive experience building user interfaces and applications using react and react-native frameworks. Expert in leading projects while complying with time and budget constraints. Skilled in creating prototypes of new applications or features to demonstrate potential functionality to stakeholders. Proficient in working in an agile software development environment. In-depth understanding of front-end architectural patterns, best practices, and design principles. Possess solid strengths in application and front-end development, UI/UX implementation, front-end coding, debugging, technical leadership, analytical thinking, and attention to detail. Exemplary communication and interpersonal skills; ability to build strong relations with customers, coworkers, and senior management.

🌐 Web Developer | React.js • Spring Boot • Clean UI • Scalable Backends Hi! I’m Kamal, a Web Developer focused on building clean, fast, and reliable web applications. I’ve worked extensively with React.js on the frontend and Spring Boot on the backend, creating systems that are efficient, maintainable, and user-friendly. Even though I’m new to Upwork, I’m not new to building real-world solutions. Clients appreciate my clear communication, attention to detail, and commitment to delivering high-quality work on time. ⸻ 🔧 My Core Skills Frontend Development: • React.js, Next.js, Vite • HTML5, CSS3, Tailwind, JavaScript (ES6+) • Responsive UI/UX, reusable components Backend Development: • Java + Spring Boot • REST APIs, data validation, exception handling • Authentication (JWT, OAuth2) • Microservices basics • MySQL, PostgreSQL, MongoDB Tools & DevOps: • Git/GitHub • Docker basics • Deployment: AWS, Firebase, Vercel, Netlify ⸻ 🚀 What I Bring to Every Project ✔ Clear and consistent communication ✔ Clean, maintainable code ✔ Strong problem-solving mindset ✔ Fast turnaround and flexibility ✔ Professional attitude and reliability ⸻ 💼 How I Can Help You • Build full web applications (frontend + backend) • Develop or enhance Spring Boot APIs • Create modern, responsive React UIs • Optimize performance or clean up old code • Add new features, fix bugs, or refactor existing code • Integrate third-party APIs or services ⸻ ⭐ Let’s Work Together If you’re looking for a dedicated developer who takes your project seriously and delivers quality results, feel free to send me a message. I’m excited to help bring your idea to life and build a great working relationship.

Senior Software Engineer with 12+ years of experience in microservice applications using Java, Spring Boot, Spring WebFlux, cloud native application with AWS and Azure. Strong problem-solving and analytical skills, overseeing the full software development lifecycle from design to deployment worked on Transportation, E-Commerce, and Banking domain.

I specialize in full-stack development using the MERN stack (MongoDB, Express, React, Node.js) and Java Spring Boot. My focus is on building reliable backend systems and clean, responsive frontend interfaces. 🔹 Backend Development RESTful API design and development (Node.js / Express / Spring Boot) JWT-based authentication and role-based authorization systems Secure password handling and user authentication flows Database integration with MongoDB and relational databases Middleware implementation (logging, error handling, CORS configuration) 🔹 Frontend Development Responsive and interactive UI development using React State management using Context API API integration using Axios Authentication flows (login, registration, protected routes) 🔹 DevOps & Software Practices Basic CI/CD understanding and deployment workflows Git version control and collaborative development Docker fundamentals for containerized applications Agile development methodology and iterative delivery

TL; DR: Java Dev, Front-End to Back-End, Web Dev, 2D Game Dev, Cloud Experience, Linux Enthusiast. With over 17 years of versatile problem-solving experience, I've actively contributed to the success of software development endeavors in various capacities, from established companies and remote collaborations to start-ups and consulting projects. My expertise spans both front-end and back-end development within the Information Technology domain. Specializing in research and development, prototyping, and object-oriented programming, I thrive in environments that prioritize Test-Driven Development (TDD), Pair Programming, and the meticulous crafting of code. I bring a unique skill set that includes data investigations, server administration, and minimalist graphic design upon request. In prior times, I've also gained proficiency in a wide range of technologies, including Java, Spring, JDBC, jOOQ, Tomcat, JBoss, MySQL, PostgreSQL, Linux, JavaScript, Vue, Dojo, jQuery, LibGDX, Phaser, Godot, Git, Subversion, AWS, Azure DevOps, TRAC, and Microsoft Teams. Recently, I've been focusing on low-level areas such as operating system internals, memory management, bit manipulation and hardware interaction with bill acceptor devices and thermal printers using Win32 APIs, MinGW, POSIX, Lib C, SQLite, C, C++, and Zig. So far, I'm only targeting x86/x86_64(or amd64) and ARM CPU architectures. While I have experience with various other technologies mentioned in the past, my current efforts are centered around these specific areas.