❯ whoami
Habtamu Asefa_
Full-Stack AI Engineer/AI Product Engineer/ships end-to-end
// summary
Full-Stack AI Engineer who ships AI-native products end-to-end — from LLM agents and RAG through mobile UX, backend, and cloud deployment. Founder of PrepX, an AI tutoring app (1,000+ users, 250 MAU), and Temaribet, a tutoring marketplace scaled to 4,000+ tutors and 500+ families. Author of react-native-ajora, an open-source agent-UI library with 6,100+ npm downloads. Delivers production software remotely for US/EU startups.
# technical_skills — 8 domains
AI engineering
LLM agents, RAG, tool calling, prompt engineering, evals, streaming AI UX, model routing (OpenRouter)
Search & retrieval
Qdrant (vector), Typesense (full-text), hybrid search, textbook & curriculum indexing
Backend
NestJS, FastAPI, Node.js, Express, REST APIs, auth, notification pipelines
Mobile
React Native, Expo, EAS Build, offline-first architecture, SSE streaming interfaces
Agent tooling
Agno, Mastra, AG-UI / CopilotKit patterns, server-side tool execution
Databases
PostgreSQL, MongoDB, SQLite
DevOps
AWS EC2, Debian Linux, Nginx, PM2, Certbot, SSL/DNS, production debugging
Languages
TypeScript, JavaScript, Python, SQL
# experience — git log --author=habtamu
Founder & Lead Engineer
PrepX — AI-native learning platform
Textbook-grounded AI tutoring with offline-first mobile UX for Ethiopian high-school students.
- Built and shipped the full React Native (Expo) app and AI tutoring pipeline; grew to 1,000+ installs, 250 MAU, 5★, and launched subscription monetization with a 3-person team.
- Designed a hybrid RAG system (
Qdrant vector + Typesense full-text) for answers grounded in the curriculum, kept model-agnostic across Gemini, GPT, Claude, and open models via OpenRouter.
- Modeled a self-referential curriculum graph across 4 grades, 6 subjects, and 12 years of national exams — ~229K questions, 13.5K quizzes, 5.75K worksheets, 1.86K flashcard sets.
- Built backend services with NestJS, FastAPI, and PostgreSQL powering chat, retrieval, content workflows, notifications, and live competitions.
Founder
Temaribet — tutoring marketplace
In-home tutoring marketplace connecting families with vetted college-student tutors.
- Built and operated a two-sided marketplace to 4,000+ tutors and 500+ families (started as a freshman), owning onboarding, matching, operations, and product strategy.
- Selected into Reach for Change and Orbit Innovation Hub accelerators (backed by the IKEA Foundation & Mastercard Foundation); awarded grant funding and won a startup pitch competition.