Key Skills

Job Description

A few years from now, our platform will run in buildings across the whole of Europe. How the back-end underneath it is built, is decided by you. You'll join the market leader in AI SaaS for commercial real estate as a senior, right as we roll out to Belgium, Luxembourg and Germany. Your architecture decisions won't disappear into a committee: they become the foundation the whole team builds on. About Healthy Workers Healthy Workers is an Amsterdam-based AI SaaS scale-up and the market leader in building optimisation for commercial real estate. Owners of commercial real estate are under real pressure to make their buildings more sustainable. Our platform helps them do that: we connect to the installations in buildings and collect data in order to make them run smarter, using less energy and giving people more comfort. We work directly with those owners. After the Netherlands, we're now rolling out in Belgium, Luxembourg and Germany, with the rest of Europe next. We are informal, lines are short, and you'll work closely with the founders every day. What you'll do You'll join our Product team as the senior on the back-end. You build alongside the team, and you make sure both the team and the platform are ready for the next stage of growth. Shape the back-end architecture and write down the decisions, so nobody has to guess a year from now why something was built this way Get the platform ready for Europe: scalable, fast and reliable, from API to infrastructure Help build AI features that control building systems more intelligently Work with our Data team and SkySpark (our building analytics platform) to make Healthy Workers the single source of truth for all building and customer data Keep production healthy and the bug backlog under control Coach colleagues, review code within one working day and make sure no service depends on a single person What your week roughly looks like: ~60% building: APIs, data models, integrations and AI features ~20% maintenance, devops and infra: bugs, monitoring, CI/CD and scalability ~10% code reviews and security (pentests and ISO) ~10% stand-ups, refinement, sprint planning and retros Our stack Kotlin, Micronaut, MySQL, BigQuery, Docker, Kubernetes, GitLab CI, Terraform, Google Cloud Platform and SkySpark. We plan in Linear. Coming from Java? Perfect! Kotlin will feel familiar quickly, and with your JVM experience you'll be up to speed within a few weeks. What you bring Must-haves: Experienced as a back-end developer with Java or Kotlin You've designed APIs and data models for systems that grow, and you've made architecture choices you then had to work with You're used to owning production: debugging, monitoring and resolving incidents Docker, Kubernetes and CI/CD are part of your everyday toolkit You make others better through constructive reviews, knowledge sharing and good documentation You are fluent in English and live in the Netherlands Please note: we can't offer visa sponsorship or relocation support. Nice to have: Experience with Terraform, GitLab CI or Google Cloud Platform Knowledge of C# Experience with security and certification, such as ISO An interest in building, energy or sensor data What you get A salary that matches your experience. We'll discuss it openly in the first conversation A SAR plan (stock appreciation rights), so you share in the growth of Healthy Workers 30 days of paid holiday A learning and conference budget Commuting allowance No on-call Real ownership: you work directly with our Founders Jonatan and Guus on where the back-end is heading The process From first conversation to decision takes 2 weeks at most. After every step, you'll hear back from us the next day. No weeks of silence. Sound like your next step? Apply via the button below or drop me a message. Your CV or just your LinkedIn profile is enough, no cover letter needed. Want to chat first to see if it's a fit? Let's grab a coffee in Amsterdam or have a quick 15-minute call. Maarten Wolters [email protected] or +31 6 13392042.

Core Responsibilities

Design and document the back-end architecture, build scalable APIs, data models, integrations, and AI features, and prepare the platform for expansion across Europe. Own production health and infrastructure, collaborate with the Data team on building and customer data, and support colleagues through code reviews and knowledge sharing.

Requirements

Candidates need back-end development experience with Java or Kotlin, experience designing APIs and data models for growing systems, and a track record of making architecture decisions. They must be comfortable owning production and using Docker, Kubernetes, and CI/CD, communicate fluently in English, and live in the Netherlands; visa sponsorship and relocation support are unavailable.

Benefits

• Stock Appreciation Rights
• 30 Days of Paid Holiday
• Learning and Conference Budget
• Commuting Allowance
• No On-Call Duties