Every application starts with clean architecture and ends with a fast, production-grade deployment. Filter by stack, or open any project for the full engineering write-up.
An engineer-led full-stack study workspace built across Next.js 15, NestJS 12, BullMQ, and PostgreSQL with pgvector. Combines a virtualized PDF.js/DOCX reader, 768-dim RAG retrieval with strict citation validation, worker cold-start wake handshakes, and spaced-repetition tools.
A production-grade, domain-driven retail platform engineered with React 19, Express 5, and PostgreSQL. Features an immutable double-entry stock ledger, deterministic row-ordering deadlock prevention for concurrent POS checkouts, real-time WAC valuation, and transit discrepancy isolation across distributed branches.
A flagship digital engineering showcase and deep-dive technical publication platform engineered with Next.js 15, TypeScript, and Motion. Combines tactile Swiss editorial aesthetics with rigorous full-stack systems: an in-memory session animation cache eliminating client route replay, a 220vh sticky process sequence governed by a 0.02 hysteresis margin, a mechanical keyboard switchboard with shared spring layout physics, and contract-first schema validation across a pnpm monorepo.
An enterprise-grade civic charity and social support platform engineered for the Adama City Administration in Oromia, Ethiopia. Built with React 19, Express, TypeScript, and PostgreSQL with pgvector. The platform features an intelligent AI chatbot powered by Google Gemini and Retrieval-Augmented Generation (RAG) acting as an on-demand civic concierge: it assists citizens by clarifying complex Kebele aid verification guidelines, guides donors through multi-channel bank and Telebirr payment reconciliation, and provides municipal administrators with automated case queue summaries and fraud-detection telemetry via role-partitioned vector queries.
A full-stack stationary retail storefront and laptop repair booking platform built with React 19, Vite 8, Express 5, and zero-ORM PostgreSQL. Unifies persistent database-backed carts, transactional checkout snapshots, purchase-verified reviews, stateful repair ticket triage, and trilingual (EN/AM/OM) SQL catalog resolution.