Most of these started as something I didn't know how to do. That was the point.
A Redis-compatible database built from scratch in Go. It works with the official redis-cli, redis-benchmark and client libraries, with AOF persistence and crash recovery, leader-follower replication, and automatic failover through Raft-inspired majority elections. Verified against real Redis with 100,000 randomized commands, and tuned to 660k GET/s with pipelining.
A full-stack workout tracker: a native Android app backed by a Ktor REST API and PostgreSQL, deployed on Railway. Start a workout, pick an exercise, log sets, reps and weight. In beta with real users.
An offline-first journal for Android and desktop, synced through a stateless Go REST API. Push/pull sync with conflict resolution, versioned records and tombstones, plus Google Sign-In with JWTs.
An AI-powered note-taking app that keeps notes and uploaded files of different formats in one workspace, with automatic summaries, content extraction and contextual search across your documents.