Joel User
@joeldag
Full-Stack Developer | AI Trainer & Technical Evaluator
EthiopiaWhat I'm looking for
I build custom web applications and automated workflows as a freelance Full-Stack & Automation Developer, using Next.js, React, Node.js, Python, n8n, webhooks, and REST APIs. I focus on performance, user experience, robust error handling, and reliable JSON and API integrations.
I've also evaluated AI voice and text outputs, validating tool calls, API payloads, transcriptions, and rubric-based quality. My projects include a Vapi-to-Cal.com scheduling pipeline, Folio an AI study companion using Gemini and a Python/Telethon Telegram channel forwarder.
Experience
Work history, roles, and key accomplishments
Full-Stack & Automation Developer
Freelance
Aug 2025 - Present (1 year 1 month)
Developed custom web applications using Next.js, React, Node.js, and Tailwind CSS, and built automated backend workflows with Python, webhooks, n8n, and REST APIs.
AI Evaluation & Prompt Engineering Specialist
Freelance
Apr 2024 - Sep 2025 (1 year 5 months)
Evaluated AI-generated voice and text outputs for technical correctness, JSON structure, and natural language alignment, and validated tool call logs and API payloads.
Education
Degrees, certifications, and relevant coursework
Addis Ababa Science and Technology University
Bachelor of Science, Electrical and Computer Engineering
2024 -
Grade: 3.63
Activities and societies: GDG
Availability
Location
EthiopiaAuthorized to work in
Salary expectations
Social media
Skills
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