Cloud & infrastructure
Containerised microservices on AWS EKS and ECS running on Fargate behind load balancers. Cross-cloud migration of a live platform onto AWS Elastic Beanstalk while Azure stayed in service. Infrastructure redesign driven by the bill, not the diagram — and CI/CD that gates every release on lint, test and deploy stages.
Evidence → Leafgistics WMS · Azure cost redesign · Sehat Kahani migration
Backend & APIs
Node.js, TypeScript and Python services — REST design, event buses over NATS Streaming, WebRTC consultation backends and Server-Sent Events streaming.
Node · TypeScript · Python · Koa2 · Express
AI / LLM tooling
MCP servers exposing real systems as LLM-callable tools, and multi-agent orchestration in LangChain/LangGraph across Claude, OpenAI and Gemini — with a QA gate in front of generated output.
MCP · LangGraph · Pinecone · Multi-provider
Data & storage
MySQL, PostgreSQL, MongoDB and Redis in production, plus an OLAP warehouse migration from Amazon Redshift to ClickHouse that kept columnar query speed while cutting cost.
MySQL · Postgres · Redis · ClickHouse
Mobile delivery
React Native and Expo at release scale — offline-first sync for field staff, native call integration, SDK migrations and automated release pipelines with version-consistency gating.
React Native · Expo · EAS · Native modules