Senior Python Engineer — FastAPI & Event Sourcing

Locus; Amsterdam; Hybrid; EUR 90,000 - 130,000; Full time

Job summary

Locus is seeking a Senior Python Developer in Amsterdam to join our small team building property management software. You will work on backend features using Python, FastAPI, PostgreSQL, and Redis, turning requirements into robust implementations.

You’ll collaborate with domain experts, write maintainable code with domain-focused tests, and help shape architecture while mentoring colleagues in a fast-paced, product-driven environment.

Qualifications

• Strong experience building and maintaining Python applications, ideally with FastAPI and event sourcing.
• Understanding of relational databases, transactions, backend design, and architectural tradeoffs.
• Collaborative mindset: share thinking, listen, follow through, ask for help.

Responsibilities

• Turn requirements into an implementation, bringing your own ideas to the solution.
• Develop backend features using event sourcing to model business processes and record changes.
• Write maintainable code and domain-focused tests that validate business flows and document how they should work.
• Work with domain experts to validate features, then iterate on their feedback.
• Mentor colleagues and offer guidance on technical decisions, helping the team achieve more together.

Skills

Python

FastAPI

Event sourcing

Relational databases

Tools

PostgreSQL

Redis

Job description

Locus is seeking a Senior Python Developer in Amsterdam to join our small team building property management software. You will work on backend features using Python, FastAPI, PostgreSQL, and Redis, turning requirements into robust implementations.

You’ll collaborate with domain experts, write maintainable code with domain-focused tests, and help shape architecture while mentoring colleagues in a fast-paced, product-driven environment.