I build backend APIs, full-stack SaaS products, and AI-integrated systems. Experienced in Azure infrastructure and African payment systems (M-Pesa, Pesapal). Based in Nairobi, Kenya.
Nairobi, Kenya · Open to remote and on-site engagements.
ASP.NET Core, Node.js Fastify, RESTful API design, PostgreSQL optimisation, authentication systems, SignalR
View servicesNext.js App Router, React, Blazor Server and WebAssembly, Turborepo monorepo architecture
View servicesAnthropic Claude API, OpenAI embeddings, semantic search via pgvector, retrieval-augmented generation
See case studyAzure App Services, Service Bus, Redis Cache, Key Vault, Docker, Kubernetes, Terraform, GitHub Actions
View servicesM-Pesa Daraja API, Pesapal, STK Push integration, callback handling, idempotency patterns
See case studyMicroservices, CQRS and Event Sourcing, clean architecture, SOLID principles, TDD
See case studyAn enterprise SaaS platform targeting 40% reduction in healthcare appointment no-shows and 50% administrative efficiency gains for East African healthcare providers. Built on .NET 10, Azure, and microservices with CQRS/Event Sourcing. MVP in active development.
A 6-month engineering engagement at a CGIAR research centre building internal automation tooling — Python/Flask RESTful APIs, PostgreSQL integration, and web applications adopted by a cross-functional team of 12. Delivered 20% processing time reduction and 40% elimination of manual tasks.
A solo monorepo e-commerce platform bringing Riggs London fragrances to the Kenyan market, built with Next.js 14, Fastify, PostgreSQL with pgvector, Redis, M-Pesa STK Push, Pesapal, and an Anthropic Claude AI chatbot.
Honest lessons from building a Claude-powered chatbot, a pgvector semantic search pipeline, and an AI assistant into real products — covering prompt architecture, cost decisions, rate limiting, and where AI actually earns its place.
How to implement semantic search in PostgreSQL using the pgvector extension and OpenAI embeddings — covering schema design, embedding generation, cosine similarity queries, IVFFlat vs HNSW indexing, and fallback strategies.
A complete guide to integrating Safaricom's M-Pesa STK Push using the Daraja API in a Next.js 14 App Router project — covering authentication, STK Push request, callback handling, idempotency, and error states.
I take on select engagements in backend API engineering, full-stack SaaS builds, AI feature integration, and cloud infrastructure. Typical engagements run 4–12 weeks. Based in Nairobi, Kenya — remote-first.