Hi, I'm Yosef.
Tech lead and full-stack engineer based in Addis Ababa. Backends, web apps, and mobile — for teams shipping real products.
Selected work
20+ products across web, mobile, dashboards, and fintech. Open the ones that are public.
Mobile
A calm, private place to save the links you want to come back to. Share from any app, organize with groups and tags, and keep the library on your device. Optional Telegram sync is encrypted before it leaves the phone. The name Yaz is Amharic for “hold it.”
2026 · Google Play
Automation · AI
2025 · Creator
Web
2023 · Senior Engineer
Mobile
2023 · Mobile lead
Web
2021 · Senior Engineer
Web · FinTech
2023 · Full-stack
Web · Enterprise
2024 · Senior Engineer
Web · Dashboard
2021 · Full-stack
Web · Gov
2023 · Full-stack
Web · Gov
2022 · Full-stack
Web · Real Estate
2022 · Full-stack
Web · Dashboard
2022 · Full-stack
Web
2023 · Full-stack
Mobile
2023 · Mobile developer
Mobile
2025 · Mobile developer
Mobile · Game
2024 · Mobile developer
Web
2022 · Full-stack
Web
2022 · Full-stack
Web · OSS
2021 · Full-stack
What I do
Four overlapping practices. I usually own one or two on a given engagement, with hands on the rest.
Designing REST and GraphQL services in C#/.NET, Django, and Node, with attention to schema, auth, and the boring parts that decide whether a system survives growth.
End-to-end web apps with React, Next.js, and Tailwind. Marketing sites, dashboards, and internal tools, built to load fast and stay maintainable.
Cross-platform delivery with React Native and Flutter, plus native bridges when the product demands it. Shipped to the App Store and Google Play.
I lead small teams through scoping, technical design, and delivery, translating product asks into systems engineers can actually build and operate.
20+
Products shipped across web, mobile, and dashboards.
About me
Four overlapping practices: backends and APIs, full-stack web, mobile, and technical leadership. I usually own one or two on a given engagement, with hands on the rest. Currently taking on contract work, full-time remote roles, and short-term advisory. Mornings in Addis (UTC+3), happy to overlap with US or EU teams.
10+
Years building
20+
Products shipped
14+
Web products
5+
Mobile apps
Clients say
“Yosef brings both technical excellence and a collaborative spirit to every project. His ability to architect elegant solutions while keeping the code maintainable made him an invaluable team member. I was particularly impressed by his dedication to mentoring others and sharing knowledge across the team.”
“We've joined hands on a couple of projects for a little more than two years, and Yosef is one of the best people I've had as a team member. I highly recommend his expertise to any person looking for a software engineer.”
My process
Scoping, design, delivery, and review — the loop on the engagements I lead.
01
I translate a product ask into a system engineers can actually build and operate.
02
Schema, auth, and the contracts that decide whether a system survives growth.
03
Hands-on delivery across the backend, the web app, or the mobile client.
04
Code review and mentorship while the work ships.
Experience
Apr 2026 — Present
Eaglepoint AI · Hybrid · Full-time
Designing and refining training data and workflows to improve LLM performance on coding and software development tasks. Generating, evaluating, and debugging AI-produced outputs; building structured datasets including step-by-step reasoning, tool-use trajectories, and real-world development scenarios using Claude and Cursor.
Feb 2017 — Present
SiCS IT Outsourcing · Addis Ababa · Hybrid
Leading delivery on outsourced engagements; architecture, code review, mentorship.
Jan 2026 — Mar 2026
Whales Technology · Pairgap · UAE · Remote
Building the marketing site and mobile apps for the Pairgap wealth-tech product.
Jan 2021 — Jan 2026
BawsHuman · United States · Remote
Health and fitness platform, long-tenure senior IC across web and APIs.
Apr 2019 — Dec 2021
Talentral / ZippyApp · United States · Remote
Hiring platform for hourly workforce, full-stack across React and Node.
Aug 2016 — Sep 2017
CloudX Inc. · United States · Remote
Early offshore engagement, full-stack delivery for U.S. clients.
Skills
Languages
Frontend
Backend
Data
Infra & tools
Education
M.Sc. and B.Sc. in computing, an ALX Africa certificate, and a Codility silver award.
Addis Ababa University
2014 — 2017
2010 — 2013
ALX Africa · Jul 2024
Codility · Sep 2021
Ethiopian Full Gospel Theological Seminary · 2019 — 2021
GitHub
3,247 contributions in the last year, across 55 public repositories.
Build log
Architecture calls, UI decisions, failed experiments, and what finally shipped. The notes live on Telegram.
Apr 18, 2025
Journey · 5 min
After years of shipping products for other people, I decided to document my own process: the decisions, the dead ends, and the small wins. This is why.
Read on TelegramFeb 3, 2025
Mobile · 8 min
What it actually takes to go from a design handoff to a live native app: SwiftUI quirks, App Store review, and the things no tutorial covers.
Read on TelegramNov 14, 2024
Backend · 7 min
Schema design, pagination contracts, auth boundaries — the choices that feel dull in week one and become load-bearing in year two.
Read on TelegramLet's create something
Currently taking on new engagements: contract, full-time remote, or short-term advisory. Mornings in Addis (UTC+3), happy to overlap with US or EU teams.