MD Rasel Khan

AI-driven audit automation — USA client (augmented team)

• Architected and shipped a RAG-powered audit automation platform that ingests and analyzes large financial documents, reducing manual review time for enterprise accounting workflows.
• Engineered RESTful APIs and microservices in Node.js and Python (FastAPI, SQLAlchemy) for document ingestion, audit report generation, and structured analysis of balance sheets, income statements, and cash-flow data.
• Designed RAG pipelines on PostgreSQL (pgvector) and Milvus with Azure OpenAI, enabling semantic search over chunked financial documents for context-aware audit insights.
• Built Azure API Management with wildcard pass-through routing, outbound response scrubbing, and Key Vault–managed token rotation via Container Apps Jobs (Playwright) to remove manual refreshes.
• Developed PydanticAI agents and CrewAI workflows for structured AI tasks—footnote extraction and financial-statement cross-referencing—improving extraction accuracy and reducing hallucinations.
• Hardened the platform with secure coding practices and full CI/CD on Azure for regulated enterprise data.

Multi-vendor event management — USA client (augmented team)

• Owned end-to-end architecture (SvelteKit + Supabase + Stripe + Vercel) for ticketing, vendor onboarding, waitlists, and interactive seat selection.
• Modeled multi-tenant PostgreSQL schemas for vendor profiles, seat inventory with reservation locking, and transactional payments—preventing double booking under concurrency.
• Integrated Stripe Connect (destination charges) with platform fees, payouts, and webhook-driven payment state machines.
• Implemented a PostgreSQL-native OTP layer using pgcrypto on Supabase, removing Redis dependency and lowering infrastructure cost.
• Delivered serverless transactional email via Supabase Edge Functions and Resend.

Online shopping assistant — Finland client (augmented team, 2.5+ years)

• Built a personalized recommendation and analytics engine in React.js and TypeScript, driving measurable uplift in upsell, cross-sell, and daily-deal conversions.
• Developed scalable NestJS backends with Serverless Framework, AWS SQS, and DynamoDB for high-volume product and event data.
• Designed event-driven pipelines with Lambda, S3, Glue, and Athena for real-time analytics and historical archival.
• Shipped QuickSight dashboards for merchant performance, funnels, and revenue trends atop Athena.
• Rebuilt the merchant dashboard in Next.js App Router—faster loads and clearer long-term maintainability.
• Mentored juniors and ran structured CodeCamp training for new graduates.

Platform engineering & client delivery

• Delivered scalable REST APIs and microservices with Node.js (NestJS, Express) and MySQL, using RabbitMQ for resilient async messaging.
• Re-architected a monolith into microservices; integrated Bitcoin and Ethereum payments for client projects.
• Implemented Redis pub/sub caching, WebSockets, and Socket.io for live chat and FCM push notifications.
• Built React frontends for an auction system and a Japan-based power grid supplier operations platform.
• Established logging, monitoring, and alerting to detect and resolve production issues early.

Manufacturing operations software

• Built backend modules in Node.js, PHP, and MySQL for production planning, task management, and operational workflows.
• Developed real-time dashboards with WebSockets, Kendo UI, and jQuery for live visibility.
• Authored BIRT reports for QC, maintenance, and incident tracking.

Government digital initiative (ADP / a2i)

• Delivered Laravel + MySQL solutions for Bangladesh’s Annual Development Programme under the a2i initiative—budgeting workflows and reporting.