Python backend engineer · Bogotá, Colombia — open to remote

I build backends that stay up.

Asynchronous FastAPI services on PostgreSQL, authentication that holds, and the Debian servers, containers and pipelines underneath them.

Two years of production ownership: schema design through to reverse proxy and TLS, with nobody downstream to hand the hard part to.

Physics at Universidad de los Andes behind the mathematical work: Kalman filtering, sensor fusion, and data pipelines that have to be right rather than merely finished.

raw samplesKalman filtered

All workgithub.com/JsNcAr

Currently

Lead Backend and DevOps Engineer at Apollyon S.A.S, where I am the sole owner of the backend and the infrastructure it runs on.

Also available for project work and classes.Services

Selected work

Three systems I owned end to end.

Present

Apollyon S.A.S

Lead Backend & DevOps Engineer (COO)

Offline-first proximity tracking and communication platform. Sole backend and infrastructure owner.

  • FastAPI
  • SQLModel
  • PostgreSQL
  • Docker
  • systemd
  • Caddy
  • GitLab CI/CD
  • BLE
  • Kalman filters

Personally AI

Backend & Data Engineer, Head of Engineering (CTO)

AI automation studio. Grew engineering from a solo operation to a team of 5 while remaining hands-on.

  • FastAPI
  • Pydantic
  • SQLAlchemy
  • Selenium
  • Pandas
  • Apollo API
  • Hetzner Cloud
  • Docker

Atonga

Backend Engineer / Co-CTO

AI-driven multichannel e-commerce platform for small entrepreneurs.

  • FastAPI
  • PostgreSQL
  • WebSockets
  • OpenAI API
  • Jira

Working stack

Languages
  • Python
  • SQL
  • Bash
  • Kotlin (basic)
Backend
  • FastAPI
  • SQLModel
  • SQLAlchemy
  • Pydantic
  • PostgreSQL
  • REST
  • WebSockets
  • Webhooks
  • OAuth2
  • JWT
  • RBAC
  • bcrypt
Infrastructure
  • Debian / Ubuntu
  • Docker
  • systemd
  • Caddy
  • GitLab CI/CD
  • GitHub Actions
  • Hetzner Cloud
  • on-prem servers
  • Git
Data and AI
  • Pandas
  • NumPy
  • Selenium
  • OpenCV
  • OpenAI API (RAG)
  • Extended Kalman Filters