Chris Okeke

Backend and AI engineer with 4+ years shipping production systems, based in Nigeria and working hours that overlap both EU and US East.

I am currently one of the developers on CarCheck, a B2B car-rental CRM that 20+ rental companies run their daily operations on, the largest with over 100,000 registered users. There I built the vision extraction service that took document intake from 3 to 5 minutes down to under a minute, parsing passport, licence, rental agreement and traffic-fine images straight onto inspection records. I also built the services behind self-service renting, so a customer reserves, signs and pays without an office visit or a phone call.

On my own I built Yapshop, a LangGraph WhatsApp commerce agent with 30+ tools that takes a customer from browse to checkout with no human in the loop. It serves five Nigerian languages through a Whisper and TTS voice pipeline, handles mid-sentence code-switching, and runs on an async FastAPI backend with per-conversation locking over a 23-table Postgres schema. Sliding-window memory and prompt caching cut input-token costs 90%. I also built SonicAI, a 5-stage RAG document intelligence platform that gives staff cited answers over internal document stores, with per-message token tracking so the business can see exactly what its AI spend buys.

Before that I architected event-driven NestJS microservices over RabbitMQ carrying 50,000+ concurrent students across 5+ universities, using CQRS and event sourcing to make every grade and enrolment change a replayable event rather than an overwritten row, and cutting response times 40%. I also built database-per-tenant infrastructure and Stripe webhook handling for a Toronto food-tech marketplace, holding 98% payment success and 99.9% uptime.

I am strongest in agent orchestration, event-driven backend architecture and LLM cost control. Open to remote roles.