# Luis Osio Chico — Full-stack Software Engineer

Colombia (UTC-5). In production systems since 2024. Open to remote roles.

TypeScript end to end: React, Node.js (Express, NestJS), AWS, PostgreSQL, Cloudflare.

I build web products end to end: the screens people touch and the systems underneath.

## Selected work

- **mdingest** — articles to clean Markdown for LLMs. Cloudflare Workers, four interfaces on one core (REST, CLI, web, MCP). Live: https://mdingest.knightker.workers.dev · Case study: /work/mdingest
- **replication-lag-lab** — hands-on Postgres replication lag + read-your-writes lab, Docker + pg + TypeORM, with a written essay.
- **italki-cli** — italki from the terminal: lessons, teachers, scheduling. CLI + MCP server.

## Experience

- **TXEN / We4Labs** (Software Engineer, dec 2025 - aug 2026) — core engineer on a B2B tax-compliance platform covering all 1,103 Colombian municipalities. Hot endpoint 5-8s to ~150ms, 19-phase ETL over 118k+ records, AWS migration in 12h with zero data loss.
- **Nord Tech** (Junior to Software Engineer in under a year) — real-time reservation platform (Scala, Kafka, WebSockets); migrated a 100+ endpoint fintech codebase.

## Machine-readable

- /v1/me.json — profile · /v1/projects.json — projects · /v1/experience.json — experience
- /openapi.json — spec · /llms.txt — index · /llms-full.txt — everything in one fetch

## Contact

- osiochico@gmail.com · github.com/LOsioChico · linkedin.com/in/losiochico
- CV: /cv.pdf