Samuel Osei, homeSay hi

I build software that everyone can use.

I’m Sam, a software engineer in Accra. I made Breakeven, which shows investors on the Ghana Stock Exchange the price that gets their money back, and Sika, an investing assistant inside WhatsApp. I also founded TechAble, which trains people with disabilities for work in tech.

More about me

Products

Aeero

Website for an AI study assistant

Aeero is a study assistant that lives in a student's text messages. I helped design its website and built it, from the call to action that opens a text to the blog.

More work

  1. 01Fido, reimaginedExperiment, 2026
  2. 02AkoFresh, reimaginedExperiment, 2026
  3. 03Laurus AfricaFinance, 2025
  4. 04PenOlive Family ResortHospitality, 2025
  5. 05samuelosei.comPersonal site, 2025
  6. 06Clare Tenewaa DukuPortfolio, 2026

How I build

Interfaces
TypeScript, React, Next.js and Tailwind, built to WCAG 2.2 AA.
Back ends
Java and Spring Boot, PostgreSQL, Cloudflare Workers.
Infrastructure
AWS, Google Cloud, Cloudflare and Hetzner. Docker Compose, Caddy, GitHub Actions.
AI
I build with Claude Code and Codex, and ship tool-calling agents checked by plain code.