YEABISERA Tesefaye
@yeabiserat
I build secure backend APIs, full-stack web applications, and rigorous evaluation tasks for frontier LLMs.
EthiopiaWhat I'm looking for
I build secure backend APIs, authentication systems, dashboards, and data-driven interfaces end to end with Python, TypeScript, FastAPI, and Next.js.
At Ethiopian Airlines, I assess web and API security, reverse-engineer unfamiliar codebases, and report vulnerabilities with concrete remediation guidance. At iCog Labs, I built and maintained backend services supporting Next.js and React applications.
Alongside freelance client work, I author deterministic evaluation tasks and tests for frontier LLMs, including SWE-bench-style task design, pytest/Jest suites, and Docker-isolated harnesses. I focus on clean, reviewable diffs and correctness failures that matter.
Experience
Work history, roles, and key accomplishments
Freelance Full-Stack Developer
Self-employed
Jan 2025 - Present (1 year 8 months)
Delivered authentication systems, dashboards, and data-driven interfaces end to end using Next.js, TypeScript, and FastAPI. Owned full project lifecycle from requirements to deployment across client engagements.
Application Security Engineer
Ethiopian Airlines
May 2024 - Present (2 years 4 months)
Performed security assessments and penetration tests across web and API surfaces, reading and reverse-engineering unfamiliar codebases under time pressure. Identified and reported vulnerabilities with concrete remediation guidance for engineering teams.
Back End Developer
iCog Labs
Jun 2023 - Sep 2024 (1 year 3 months)
Built and maintained backend services supporting a Next.js and React frontend in a small, hybrid agile team.
Education
Degrees, certifications, and relevant coursework
Addis Ababa University
Bachelor of Science, Computer Science
Pursued a Bachelor of Science in Computer Science at Addis Ababa University.
Tech stack
Software and tools used professionally
Availability
Location
EthiopiaAuthorized to work in
Salary expectations
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