SAMIUL SK

• Led backend integration migrating a legacy booking provider to a new 3PL platform with zero disruption.
• Engineered and scaled Go-based microservices supporting high-throughput logistics and shipment booking workflows.
• Optimized PostgreSQL connection pooling for high-concurrency services, significantly reducing database bottlenecking.

• Architected backend services and a scalable RAG pipeline using Python and FastAPI to support AI-assisted learning workflows.
• Integrated OpenAI GPT models with persistent user sessions, implementing token tracking and comprehensive error handling.
• Standardized database schema versioning by introducing Alembic migrations, reducing deployment failures by 90%.
• Migrated application assets to AWS S3 and CloudFront with secure authentication, achieving a 40% reduction in latency.

• Led the decomposition of a legacy Go monolith into independently deployable microservices utilizing Domain-Driven Design principles.
• Built core financial APIs securely processing over $1M in monthly transaction volume with a fault-tolerant Stripe integration (99.95% success rate).
• Designed and executed a rollback-safe data migration strategy for 50,000+ user accounts using incremental batching.

Developed backend services using Go and the Gin framework for a high-concurrency booking platform. Designed a Redis-backed notification service.

Developed scalable backend applications using Python and Django. Engineered a Python backend SDK for seamless integration with a BNPL service.