Senior Full-Stack Developer building scalable IoT, cloud-native, web & mobile applications using C#, React, Golang, Azure, Kubernetes, Flutter & DevOps technologies.

• 🌍 Based in Denmark
• 💻 Passionate about programming, cloud-native systems, and self-hosted infrastructure
• ⚡ Building scalable IoT and real-time systems
• 🧠 Exploring Kubernetes with a 10-node Raspberry Pi bare-metal lab
• ✍️ Writing technical blogs and sharing personal projects
• 🎓 Volunteer web development instructor at ReDI School Copenhagen

I have experience building scalable systems across web, mobile, desktop, IoT, and cloud platforms. My work includes high-volume telemetry systems, cloud migrations, real-time data processing, internal operational platforms, and industrial visualization systems.

Currently working with battery energy storage platforms and IoT systems handling:

• 3,000+ connected battery devices
• 18,000+ telemetry messages per minute
• Cloud-native services running on Azure & Kubernetes
• React/Next.js applications for installers and operations teams

I enjoy building products end-to-end - from backend architecture to frontend UX, mobile apps, infrastructure, and deployment.

C#, Golang, TypeScript, JavaScript, Python, Dart, SQL

ReactJS, Next.js, Redux, React Query, Vue.js, WPF

ASP.NET Core, Node.js, Express.js, NestJS, REST APIs, Entity Framework

Flutter, React Native, Kotlin

Azure, Azure IoT Hub, Kubernetes, Docker, Docker Compose, ArgoCD, Azure DevOps, Cloudflare, DigitalOcean

PostgreSQL, SQL Server, MongoDB, SQLite

Grafana, Loki

• Reduced infrastructure costs by ~43% by migrating legacy Azure Service Fabric APIs to ASP.NET Core services deployed on Kubernetes.
• Delivered zero-downtime migration for 3,000+ IoT battery devices.
• Migrated Azure Stream Analytics workloads into custom Golang services handling 18,000+ telemetry messages per minute.
• Built operational dashboards and observability tooling using Grafana and Loki.

• Built installer applications used by electricians across Denmark for battery installation workflows.
• Developed Flutter proof-of-concept mobile apps published to both Apple App Store and Google Play Store.
• Modernized legacy React/Redux systems into Next.js applications.

• Developed WPF-based 3D visualization systems for mining stockyard automation.
• Rendered real-time point cloud data from industrial 3D scanners for automated stack/reclaim operations.

• 🧩 3D Sokoban puzzle game
• ☁️ Raspberry Pi Kubernetes bare-metal lab
• 👨‍👩‍👧 Collaborative family tree platform with 1,000+ members
• 🏥 Pharmacy SaaS & POS systems
• 🇩🇰 Danish learning quiz platform
• 📋 Anonymous classroom Q&A platform
• 📱 Cross-device clipboard sync app
• 🚚 Expense tracking app for truck drivers

More projects available on my website 👇

🌐 https://mkumaran.net

Teaching frontend web development and mentoring women from refugee and migrant backgrounds in JavaScript, ReactJS, and programming fundamentals.

Building backend services for managing parental consent workflows for children’s media usage.

• Tamil - Native
• English - Professional proficiency
• Danish - Intermediate (PD2.5)

• 🔥 900+ day Duolingo streak learning Danish
• 🐳 Self-hosting personal applications using Docker & VPS infrastructure
• ✍️ Technical blog with 11k+ monthly visitors and 112k+ requests
• 🎮 Love building experimental side projects and learning new technologies

• 🌐 Website: https://mkumaran.net