Hire the Best Systems Developers in Kolkata, IN

***RESUMING FREELANCING after a carrer in corporate**** Backend and systems developer working with Node.js, Rust, and C++. I build and fix Stripe payment integrations, and develop desktop apps or CLI tools with clear logic, predictable behavior, and maintainable code. Work is focused on correctness, clean structure, and reliable delivery, with minimal overhead and no unnecessary complexity.

Software Engineer | Building End-to-End Products Full-Stack • Embedded Systems • IoT • Cloud • AI I help startups, businesses, and innovators turn ideas into reliable, scalable, and production-ready products. With 7+ years of professional experience, I specialize in end-to-end software engineering, from embedded firmware and IoT devices to cloud infrastructure, backend services, web applications, mobile apps, and AI integrations. Whether you're building an MVP, scaling an existing platform, or developing connected hardware, I focus on delivering solutions that are clean, maintainable, and built for long-term success. I can help you with: • Full-stack web applications • Cross-platform mobile applications • Backend APIs & Microservices • Cloud infrastructure & DevOps • AI-powered applications & integrations • Real-time applications (WebRTC & WebSockets) • IoT solutions & connected devices • Embedded firmware (ESP32, ESP-IDF, FreeRTOS, Matter) • Linux server administration • Infrastructure as Code (Terraform) • Custom electronics & PCB design My core technologies include React, Next.js, React Native, Node.js, Express.js, PHP, WordPress, AWS, Oracle Cloud, Docker, Terraform, MongoDB, MySQL, PostgreSQL, Redis, ESP32, MQTT, Home Assistant, and Linux. What you can expect when working with me: ✅ End-to-end product development, from hardware to cloud ✅ Clean, scalable, and maintainable solutions ✅ Performance-focused engineering ✅ Clear communication throughout the project ✅ Reliable delivery and long-term support I believe great engineering is more than writing code, it's about designing solutions that are easy to maintain, simple to scale, and dependable in production. If you're looking for an engineer who takes ownership, communicates clearly, and genuinely cares about building great products, I'd love to work with you.

I’m a Senior Unreal Engine Developer and Unreal Authorized Instructor with over 7+ years of professional experience creating games, simulations, and interactive experiences. My expertise spans both C++ and Blueprints, delivering polished gameplay mechanics, multiplayer systems, AI-driven worlds, and optimized builds for PC, mobile, and VR. 💡 What I Do Best Gameplay Systems – Free-flow combat, building/placement systems, progression, and player interactions AI & Simulation – Advanced AI behaviors, pathfinding, horde systems, robotics, and large-scale simulations Multiplayer & Networking – PlayFab, Azure, and Steam integrations for matchmaking, authentication, and persistence Cloud & Media Systems – Chunked video upload/download, Azure CDN, and cloud data workflows Cross-Platform Optimization – Performance tuning for Android/iOS, VR, and PC builds UI/UX & Polish – Clean, intuitive UIs with animations and satisfying player feedback 🎓 Unreal Authorized Trainer & Instructor I’m officially certified by Epic Games as both a Trainer and Instructor in Unreal Engine. This means I not only build complex systems but also teach, mentor, and guide teams or students — simplifying advanced workflows and ensuring clear knowledge transfer. 🏆 Work Highlights Built AI-driven combat systems inspired by Batman Arkham and Middle-earth: Shadow of Mordor Created YouVerse, a digital twin platform with multiplayer networking, social features, and Azure-backed media systems Developed VR medical training simulations with realistic AI and physics Delivered prototypes and full productions for indie creators and funded clients through Oak Studio, my game development studio Contributed to published titles such as JUNK on Steam 🤝 Why Work With Me I bring the rare combination of deep technical expertise, teaching credentials, and production experience. I can deliver fast, clean prototypes under tight deadlines and also scale systems for long-term projects. My focus is always on making mechanics not just functional — but fun, smooth, and engaging to play.