Senior Python/AI developer

About the company

We're Locus, a small team in Amsterdam building property management software. We know our market, we know what customers need, and we’re ready to build the business. Join us and be part of that journey.

If you enjoy building Python applications, finding ways to make repetitive work easier, and collaborating with colleagues, we'd like to meet you. You'll build automation for the tedious, error-prone parts of our customers' workflows, taking an idea from an initial experiment into the product.

You'll work with a lean, structured codebase using Python, FastAPI, PostgreSQL, and Redis, where event sourcing and CQRS are core to the architecture. You'll connect cloud AI models to relevant application data, use their outputs to identify actionable tasks, and build those tasks into workflows that reduce manual effort and opportunities for mistakes.

About the work

Colleagues with real estate expertise are available to explore requirements and work through questions with you. With a shared understanding of the goal and context, you'll have the trust and responsibility to carry the work forward.

• Turn repetitive, error-prone steps in customer workflows into working automation, using small prototypes to explore an approach.

• Give models access to relevant application data, extract actionable tasks from their outputs, and build the logic that validates and carries those tasks through.

• Evaluate results against examples from the domain, handle mistakes and uncertainty, and make tradeoffs around response time, cost, and data privacy.

• 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.

  You'll work independently while keeping colleagues involved: share progress, discuss decisions that affect others, and raise questions or blockers in time to work through them together.

  You'll join a team with different strengths and perspectives, with room to deepen your expertise and develop in new directions.

What we'd like you to bring

• Experience with services such as Gemini, Claude, or Amazon Bedrock.

• Demonstrated experience applying cloud AI tooling to automate workflows, connecting relevant data and model outputs to actions in an application.

• Strong experience building and maintaining Python applications, ideally with FastAPI.

• A good understanding of relational databases, transactions, backend design, and the tradeoffs behind architectural decisions.

• Thoughtful collaboration: share your thinking, listen to colleagues, give and receive feedback with care, and follow through on commitments.

We'd like to hear about what you've built with cloud AI tooling, your contribution, and how you checked that it worked for the people using it.

Experience with event-driven systems and familiarity with event sourcing are part of the backend foundation we're looking for. Hands-on event sourcing experience is an advantage, and there's room to develop further depth on the job. You don't need experience with every model provider we might use.

Practical details

• You're eligible to work in the Netherlands without requiring sponsorship.

• 40 hours per week.

• 25 days of annual leave, plus national holidays.

• Salary reflects your relevant experience and the responsibilities you take on, with 8% holiday allowance on top. We share the salary range before our introductory call.

• Three days in our Amsterdam office and two days working from home each week. We spend office time collaborating, solving problems together, and exchanging ideas.

• No pension plan is currently offered.

Inclusion

We want different experiences and perspectives represented in our team. Whatever your background or path into technology, we encourage you to apply.

Everyone here has a part in making colleagues feel respected and included: listening, making space for others to contribute, and speaking up when someone is excluded or treated unfairly. We take concerns seriously and do not tolerate racism, sexism, harassment, or other discriminatory behavior.