I'm a software engineer, and I build software that holds up in any domain. I have built for a telecom, for merchants taking payments and for the recycling industry, including ERP and CRM systems. I design the system, build it end to end, and run the server it ships to.
My portfolio, with the story behind each project, is at jeffgicharu.com.
Each of these is a live site with every journey working end to end. The businesses are invented, but each site is built, deployed and run like a real one, through its own release pipeline on a server I manage.
| Project | What it is | Built with |
|---|---|---|
| Ukingo · code | A booking site for a lodge near Mount Kenya. Guests see the price of every night and pay a deposit, and staff run the front desk and the room calendar. | Next.js, React, TypeScript, PostgreSQL |
| Roomwave · code | Live polls, quizzes and questions that a whole room answers on their phones, with the results moving on the big screen as answers arrive. | Node, Fastify, Socket.IO, Svelte, PostgreSQL, Redis |
| Sebule · code | An online furniture store with M-Pesa checkout, and a back office for orders, stock and the catalogue. | Laravel, PHP, PostgreSQL, Redis |
| Oriel · code | The sales website and sales desk for an apartment tower sold before it is built. Buyers explore the tower in 3D and reserve a home, and the sales team runs homes, prices and leads from a desk that updates live. | Go, templ, htmx, three.js, SQLite |
| Umber · code | An auction house for East African art, with online sales that close lot by lot and live auctions run from a rostrum. Every bid and clock changes on every screen as it happens, and staff run the sales from a desk in the same app. | Elixir, Phoenix LiveView, PostgreSQL |
- rustlb is a Layer 4 and 7 load balancer in Rust, with health checks and hot config reload.
- rustdb is an embedded LSM-tree key-value database in Rust, with MVCC transactions and a write-ahead log.
- ContractorOS is a contractor management platform built with Next.js, NestJS and PostgreSQL.
- wallet-api and wallet-app make up a mobile money wallet, with a Spring Boot API and a React app.
- ussd-simulator is a USSD menu service in Spring Boot, with a browser phone for trying it.
I write TypeScript, JavaScript, Java, Python, PHP, Go, Rust and SQL. I build with React, Next.js, Svelte, Node, Spring Boot, Laravel and NestJS, and with React Native and Salesforce for mobile and business systems. My data lives in PostgreSQL, Redis and SQLite, and I ship through GitHub Actions to Linux servers running nginx and systemd behind Cloudflare.
These cards are rebuilt every morning from GitHub's own figures, by a small workflow in this repository.
