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Application Engineer II

Netherlands, Amsterdam · Job Posted June 16, 2026
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Job Description

Build with us - Since 2004, we've had one clear goal: to make payments and money management effortless for every business in Europe. Today, more than 250,000 companies use Mollie to get paid, manage money and grow – with products designed to be simple, scalable, and dependable. With 950+ Mollies across 14+ locations, we care deeply about autonomy and craft. So we work in small teams, with real ownership, and we trust you to make the right decisions. We're building for the long term, so we provide the tools you need, processes you can rely on, and a balanced work environment to help you do work you're proud of. Your impact: At Mollie, data and money movement are at the heart of everything we do — and the engineers who build and maintain these systems are central to our mission. As an Application Engineer II, you will work on systems that operate at the core of Mollie's platform — from the financial infrastructure that underpins every payment we process, to the data products that help our merchants grow, protect their revenue, and optimise their performance. The work is high-stakes, high-ownership, and highly visible. You will be building systems where correctness, reliability, and scale are non-negotiable — and where the things you ship directly impact more than 250,000 businesses across Europe. This is not a maintenance role. You will be joining a small, fast-moving team with a clear and ambitious mandate, working in a delivery-first environment where you take ideas from concept to production. You will have real end-to-end ownership, collaborate closely with engineers, product managers, and stakeholders across domains, and contribute to some of the most strategically important work happening at Mollie right now.

Job Responsibility

  • Design, build, and maintain backend systems and APIs that operate at high scale and high frequency — where performance, fault tolerance, and reliability are critical
  • take ownership of features end-to-end, from architecture and estimation through to delivery, production support, and continuous improvement
  • contribute to ambitious migration and modernisation initiatives, decoupling legacy dependencies and building cleaner, more scalable foundations for the future
  • transform complex technical and business requirements into well-designed, production-ready solutions — working closely with product and engineering stakeholders to shape what gets built and how
  • participate actively in agile ceremonies including brainstorming, estimation, and sprint planning, bringing both technical depth and a product-first perspective to the table
  • identify and resolve complex issues across distributed systems, applying creative problem-solving to challenges that sit at the intersection of engineering excellence and real merchant impact.

Requirements

  • 5+ years of backend engineering experience, with strong proficiency in Java and ideally exposure to PHP
  • experience with Go, C#, or Python is also valued
  • experience building and maintaining large-scale, high-volume systems — with a solid understanding of distributed systems, queuing, caching, concurrency, fault tolerance, and scalability
  • a background in financial systems, payments, or data-intensive applications is a big plus
  • end-to-end ownership mindset
  • strong communication skills, with the ability to work effectively with both technical and non-technical stakeholders across domains.

What we offer

  • 20 days working from abroad
  • Wellbeing Budget €60 per month net
  • Lifestyle and Health Support via OpenUp
  • 26 holiday days plus extra 2 days off in between 27 and 31 December
  • Commute options with NS Business Card and bike lease plan
  • Birthday off
  • WFH Equipment Budget of €400 one-off
  • Hybrid working with WFH & Internet allowance at €60 a month
  • Discounted Lunch
  • Health Insurance with ONVZ or €125 net towards own insurance
  • Annual Mollieverse event.

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