Milon Mia

Backend-focused Full-Stack Developer

Jamalpur, Bangladesh 1+ yrs exp 87 · Excellent

About

Backend-focused Full-Stack Developer with 1+ year of industry experience and around 9 months of project-based experience building production-grade backend services and full-stack web applications. Skilled in REST API design, JWT/RBAC authentication, real-time communication, AI-integrated features (RAG, vector search, OpenAI APIs), React/Next.js frontend development, and AWS deployment with Docker and CI/CD pipelines. Consistently delivered scalable, maintainable systems for international clients.

Skills & Expertise (42)

Node.js Advanced

8.1/10

1.75

Years Exp

React Intermediate

7.8/10

1.75

Years Exp

MongoDb Intermediate

7.5/10

1.75

Years Exp

Rest API Intermediate

7.5/10

1.75

Years Exp

Express.js Intermediate

7.5/10

1.75

Years Exp

JavaScript Intermediate

7.5/10

1.75

Years Exp

Typescript Intermediate

7.0/10

1.75

Years Exp

Git Intermediate

7.0/10

1.75

Years Exp

Docker Intermediate

7.0/10

1.75

Years Exp

AWS EC2 Intermediate

7.0/10

1.75

Years Exp

GraphQL Intermediate

6.5/10

1.75

Years Exp

Semantic Search RBAC OAuth 2.0 Passport.js Session management OpenAI API Ollama RAG Architecture Vector Embeddings Postman Cloudflare R2 Agile Collaboration AWS S3 Code Review VS Code JWT LINUX GitHub Actions Nginx Drizzle Mongoose Prisma Pinecone Redis Postgresql BullMQ Socket.IO Shadcn UI React Query Tailwind CSS Next.js

Work Experience

Full-Stack Developer

Spark Tech Agency (Betopia Group)

Feb 2025 - Mar 2026

Led backend of an AI conversational platform featuring dual-memory RAG architecture (short-term conversation context fused with long-term Pinecone vector store), automated embedding pipelines, and isolated concurrent multi-user sessions; established code-review standards and engineering best practices across the team. Improved API response times by 40% through MongoDB aggregation tuning, strategic compound indexing, and Redis caching layers deployed across all high-frequency endpoints. Automated production deployments on AWS EC2 using Docker containers, Nginx reverse proxy, and GitHub Actions CI/CD, eliminating all manual release steps and deployment risk. Built and maintained secure REST APIs for web, iOS, and Android clients with JWT authentication, fine-grained RBAC role hierarchies, and scalable Node.js service patterns; collaborated with UI/UX designers and Flutter developers on international client projects.