Backend developer focused on APIs, automation, functional programming, and reliable systems βοΈπ
Currently based in Valdivia, Chile π¨π±
Iβm a Computer Science graduate with First Class Honours from the University of Westminster π, and I enjoy turning complex workflows into simple, maintainable backend solutions.
My main areas of interest are:
- Backend development π β APIs, business logic, validation flows, and service integrations
- Functional programming π§ͺ β especially Elixir, Phoenix, and FP-inspired approaches to resilient software
- Automation π€ β webhooks, workflow orchestration, process design, and real-world integrations
- Infrastructure & deployment βοΈ β Docker, PostgreSQL, domain/DNS setup, SSL, CI/CD, and production-oriented tooling
- System design π§ β building software that is clear, reliable, scalable, and easy to extend
A few projects Iβm especially proud of:
- LedgerBank API π³ β an enterprise-style financial services API built with Elixir, Phoenix, PostgreSQL, Oban, JWT auth, RBAC, structured error handling, caching, and CI/CD, designed around clean architecture and production-grade backend patterns
- Tattoo Booking Bot π¬ β a production-hardened WhatsApp automation platform built with FastAPI, PostgreSQL, Stripe, Google Sheets, Google Calendar, and WhatsApp Cloud API, with booking workflows, idempotent webhooks, admin tools, reminders, and strong operational safeguards
- OrigenLab π§« β a business website for a laboratory solutions company, built with Astro + Tailwind CSS and deployed with real hosting, DNS, SSL, and email/infrastructure setup
Iβve worked across Python, FastAPI, Elixir, Phoenix, JavaScript, PostgreSQL, Docker, Stripe, Meta Cloud API, Google Sheets, and Google Calendar π with a strong focus on practical engineering, clean implementation, and real-world usability.
Iβm especially interested in backend engineering, Elixir, developer tooling, automation, and scalable systems π¦β‘ and Iβm always looking to keep learning through hands-on projects and technical challenges.
- π§ rafarojasv6@gmail.com
- π LinkedIn
Iβm also into philosophy, literature, poetry, politics, and neuroscience π𧬠β always happy to connect with people building interesting things or thinking deeply about the world.

