Hi, I’m Riyad Hossain, a Backend Engineer passionate about designing secure, scalable systems and solving complex engineering problems.

Coming from a non-CSE background, I built my journey through deep problem-solving practice, competitive programming, and hands-on industry experience. Today, I specialize in building production-grade backend architectures that power modern web applications.

I enjoy working on system design, API architecture, performance optimization, and building reliable infrastructures that scale with business growth 🚀

C/C++ • JavaScript • TypeScript • Python (familiar)

Node.js • NestJS • Express.js • REST APIs • GraphQL
Authentication & Authorization (JWT, OAuth2.0, RBAC)

PostgreSQL • MongoDB • Mongoose • Prisma ORM • Redis

Docker • CI/CD Pipelines • AWS S3 • Microservices • Clean Architecture

React.js • Angular • HTML • CSS

• Architecting secure authentication systems using JWT, Refresh Tokens, OAuth2.0, and RBAC
• Designing normalized relational database schemas with optimized indexing
• Improving API performance using Redis caching, pagination, and message queues
• Building secure file upload systems integrated with AWS S3
• Containerizing applications with Docker and streamlining deployments via CI/CD
• Producing interactive API documentation with Swagger & Postman

• Enhanced the restaurant API by implementing efficient query handling techniques, reducing response times by 30%, which improved user experience and system reliability.
• Identified and fixed 100+ bugs using rigorous stress debugging practices, improving the application’s performance and stability by 25%.
• Designed and developed Waiter APIs using RESTful principles, bridging gaps between customers and restaurant owners, which increased system usability by 20% for staff operations.

• 🥇 Codeforces Specialist (Max Rating: 1410)
• ⭐ CodeChef 3★ (Max Rating: 1637)
• Solved 500+ algorithmic problems
• Participated in 50+ programming contests

Competitive programming sharpened my analytical thinking and ability to break down complex engineering challenges efficiently.

• ⚙️ Backend Architecture — Designing scalable and maintainable systems
• 🔐 Security Engineering — Authentication, authorization, secure APIs
• ⚡ Performance Optimization — Caching, query tuning, async processing
• 🧠 Problem Solving — Strong DSA & competitive programming foundation
• 🤝 Collaboration — Agile teamwork & cross-functional communication
• 📚 Continuous Learning — Always exploring new backend & system design patterns

My goal is to grow into a Senior Backend Engineer / Tech Lead, specializing in software architecture, distributed systems, and building high-impact, scalable products. I’m passionate about solving meaningful problems through technology and contributing to engineering teams that build for scale 🌍

I’m always open to new opportunities, collaborations, and conversations. Let’s build something amazing together! 🚀