Data-Driven Full Stack Developer

At Billy Grace (HQ Amsterdam), we build an AI-driven SaaS platform that brings strategy, creativity and clarity back to marketing. Our product gives teams control over their entire funnel through first-party tracking, attribution and creative intelligence. As a Data-Driven Full Stack Developer, you’ll have real impact from day one. You build and maintain features used daily by customers, work on our in-house tracking pixel, and operate close to both the product and the data with clear ownership from idea to production.

Your impact

You work on the core of the platform at a significant moment in the company’s growth. The features you build and the technical decisions you make directly influence performance, scalability and user experience. Your work turns complex data into reliable, intuitive insights our customers depend on every day.

What you will do

• Develop backend logic for loading, transforming and mutating data for analytics and reporting

• Design and implement Django APIs, using ORM and raw SQL for performance-critical use cases

• Write and optimise complex SQL queries in data-heavy environments

• Build and maintain React.js components for a fast, intuitive user experience

• Own features end-to-end, contributing to architecture, scalability and reliability

You’ll join a team that builds together, learns together and makes each other better. We’re working on something big with energy, curiosity and plenty of room for your ideas. Here’s what you can expect:

• A salary based on your background and experience

• A MacBook and a workspace in the heart of Amsterdam (hybrid).

• 25 vacation days + your birthday off.

• Lots of trust, freedom and space for your ideas.

• Access to OpenUp for mental health and wellbeing.

• An annual volunteer day where we give back together.

• Daily lunch, great coffee and an open, warm culture.

• Opportunities to learn, experiment and grow.

• Enthusiastic colleagues, team drinks and outings that actually make you smile.

• Company Ski Holiday in March!

• 3+ years of experience as a Full Stack Developer (preferably in SaaS)

• Solid experience with React and Python-based frameworks (Django, Flask or FastAPI)

• Strong affinity with data-driven products, including complex SQL and analytics use cases

• At least 1 year of hands-on experience with pandas (required)

• Ownership-driven, communicative and comfortable taking responsibility

• Living in the Netherlands and able to work hybrid (3 days in the office, no IND sponsorship)

At Billy Grace, you help shape both the product and the engineering culture from the ground up. You’ll work in a focused tech team of five full stack developers, four data scientists and two data engineers. Your managers are hands-on engineers who write code, review PRs and make architectural decisions alongside you.

In practice, that means:

• Meetings only when they move the work forward, most days are for building, not talking

• No corporate theatre no vague roadmaps, buzzwords or politics

• Lightweight process we skip heavy Scrum rituals in favour of direct collaboration

• Fast decisions, real ownership if you own a feature, you ship it

If you’re done with planning poker, endless standups and process for process’ sake, you’ll feel at home here. Together, we build technology used daily by brands and agencies that want to move fast from Patagonia, XXL Nutrition to Stanley1913, and from Draft Digital to Happy Horizon.