Rakib Hasan Amiya
10+ years designing and delivering cloud-native, distributed systems across
e-commerce, fintech, healthcare, and logistics. Architecting scalable backend services with
Python Go FastAPI Django PostgreSQL Kubernetes
and event-driven patterns supporting millions of users. Strong background in Domain-Driven Design
and Hexagonal Architecture. Currently expanding into Generative AI, LLM integration, and RAG —
and runs day-to-day engineering through Claude Code with sandboxed, permission-scoped workflows.
Europe's leading re-commerce platform buying and reselling used books, media, and clothing.
- Architected and delivered a cloud-native backend service from the ground up using Hexagonal Architecture and DDD.
- Designed an event-driven microservices architecture using Google Pub/Sub for async, decoupled services.
- Led migration of business-critical workloads from Firestore to PostgreSQL, improving consistency and reliability.
- Optimized SQL, caching, and API performance, cutting infrastructure and query costs by 30–40%.
- Built backend services supporting large-scale marketplace operations and high-volume transactions.
- Mentored engineers through architecture discussions and design/code reviews.
- Adopted AI-augmented development via Claude Code with custom skill files and sandboxed, permission-scoped execution.
One of Bangladesh's fastest-growing e-commerce marketplaces.
- Led an engineering organization of ~80 engineers, blending strategy with hands-on architecture.
- Defined technical roadmap and engineering strategy for large-scale marketplace systems.
- Architected backend platforms for payments, orders, inventory, logistics, and customer services.
- Eliminated recurring production bottlenecks caused by database contention.
- Delivered a production-ready food delivery platform in 2 months handling ~1.5M requests/min.
- Improved performance via DB optimization, API tuning, and caching — reduced latency, raised throughput.
Telenor's digital health arm — mobile-based medical advice and health services in emerging markets.
- Built and maintained backend services on Node.js/PostgreSQL supporting 500,000+ active users.
- Reduced query latency by 40% and database costs by 30% through indexing and optimization.
- Contributed to 99.9% service availability via reliability and monitoring improvements.
- Cut delivery cycles by 2–3× as part of a small cross-functional team.
Bangladeshi super-app: ride-sharing, food delivery, logistics, and payments.
- Built key backend microservices used across multiple Pathao services.
- Improved API response times by 30–40% through query optimization and caching.
- Built production services supporting ~1M daily active users and 500K concurrent users.
Custom software solutions and digital platforms for healthcare and other sectors.
- Built high-performance medical imaging systems supporting DICOM workflows.
- Improved image transmission reliability over unstable networks by ~50%.
- Built a lossless image optimization pipeline, cutting storage/bandwidth by 30–40%.
- Built a high-performance DICOM viewer — 2× faster image load/manipulation.
- Launched Potaka.io, a Bengali programming language and online editor for native-language learners.
- Implemented Avro phonetic typing, autocomplete, and syntax highlighting.
- Built educational coding games with 30+ levels to drive engagement.