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
Web
2023 · Senior Engineer
Android
2023 · Google Play
iOS
2023 · App Store
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 · Real Estate
2022 · Full-stack
Web · Dashboard
2022 · Full-stack
Web
2023 · Full-stack
Android
2026 · Google Play
iOS
2026 · App Store
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.
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Years building
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Products shipped
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Web products
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Mobile apps
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Contributions this year
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Public repositories
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.”
Experience
May 2026 — Present
CloudX Inc. · United States
Accounts payable SaaS for clients including Versace, ADTRAN, and Nestlé. Transaction documents, automated data entry, and reporting, in C#, Node.js, and Entity Framework.
Apr 2026 — Jun 2026
Eaglepoint AI
Three months of code datasets for AI training: step-by-step reasoning, tool use, and real development scenarios, using Claude and Cursor.
Jan 2026 — Apr 2026
Whales Technology · United Arab Emirates
Four months on Pairgap. Web features, the first production Android and iOS apps through publishing, and a beta waitlist for early users.
Dec 2023 — Jan 2026
BawsHuman · United States
Web and mobile for athletes, trainers, and clients. Profiles, the exercise library, and trainer–client workout tracking.
Feb 2023 — Nov 2023
GoodPeople
Web app in React and Python. Shared design system, APIs, and interfaces built to WCAG 2 with the design team.
Nov 2020 — Jan 2023
Talentral / ZippyApp · United States
Features and fixes on the hiring platform, including a mobile-responsive admin tool.
Aug 2016 — Oct 2020
SICS IT Outsourcing · Addis Ababa
Four years with a team of 5–10 across mobile, web, and backend. Enterprise systems, including the African Union knowledge platform, plus ERP work on Odoo and ERPNext.
Sep 2013 — Jul 2016
Cybersoft Plc · Addis Ababa
From junior engineer to solution line manager for the Transport and Fleet Management System, through delivery and client training.
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
3,220+ contributions in the last year, across 55+ public repositories.
Community
JossyBuilds is the Telegram community where a build is shared while it is still in progress. The same work goes out on LinkedIn, GitHub, and TikTok, which is how it reaches and influences the people who follow it.
Telegram
JossyBuilds
The community. Builds, tester calls, and the notes behind a ship.
Join the community2,548+
A network kept over many years. The public work is what they see.
View LinkedInLet'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.