Back End Developer

Senior Backend Engineer — Python / FastAPI Halen Technologies Part-Time Remote Equity Based Halen is looking for an experienced Senior Backend Engineer to join our engineering team as we prepare our rideshare and delivery platform for launch. You’ll work on our backend services, APIs, databases, testing, and cloud infrastructure, with a strong focus on building reliable and scalable microservices. What You'll Work On Build and maintain asynchronous microservices using Python and FastAPI Design and maintain REST APIs for our mobile and web applications Work with SQLAlchemy ORM and PostgreSQL/SQLite Build data models and relationships using SQLModel Create and maintain database migrations using Alembic Write reliable unit and integration tests using pytest Work with Git-based repositories, branches, pull requests, and code reviews Deploy and troubleshoot backend services in AWS Work comfortably in Linux environments, including running scripts, services, logs, and command-line tools Collaborate with Flutter, frontend, DevOps, QA, and other backend engineers Review existing backend services and help improve performance, reliability, and scalability

What We're Looking For

Strong hands-on experience with: Python FastAPI and asynchronous programming Microservices architecture SQLAlchemy SQLModel and database relationships PostgreSQL and SQLite Alembic database migrations pytest / automated testing Git and Git-based development workflows AWS Linux Experience building production-grade APIs and microservices is important. Experience with high-volume, real-time, rideshare, delivery, logistics, mapping, or marketplace platforms is a plus. Compensation & Commitment This is currently a part-time, equity-compensated role, approximately 10–15 hours per week with a flexible schedule. You’ll receive shares in Halen for your contribution during this stage. We’re actively fundraising, with the goal of transitioning the role into a full-time salaried position once funding is secured. If you’re interested in joining Halen at an early stage and helping build the backend infrastructure behind our platform, we’d like to hear from you.