Remote: Yes

Location: Brazil (UTC-3)
Remote: Yes
Willing to relocate: No
Technologies: Go, Node.js, TypeScript, PostgreSQL, Redis, Kubernetes (EKS), Docker, AWS, GCP, GitHub Actions, Python, LLM APIs (Claude, OpenAI, Openrouter), MCP
Résumé/CV: https://hamiltonjr.dev/ - https://www.upwork.com/freelancers/hamilton
Email: [контакт скрыт] Backend engineer working as an independent contractor (registered company, invoice in USD). I build and run production backends: Go and Node services, Postgres schema and query tuning, idempotent workers with outbox and advisory locks, Kubernetes deploys and CI/CD. Recent work: migrated a platform to AWS EKS; built AI agent backends with tool calling, structured outputs and human approval gates; WhatsApp AI scheduling agent in Go (public code: github.com/aseno-up/backend). Looking for contract or long-term contractor work, 20 to 40 hrs/week. I work best async: written updates, clear PRs, documentation.