Senior Platform Engineer

Mollie; Amsterdam; On-site; EUR 90,000 - 120,000; Full time

Benefits offered by this job

Health & wellness perks

Flexible work from abroad 20 days/year

WSH Equipment Budget €400

Job summary

Mollie is seeking a Senior Platform Engineer to join the Build team within the Developer Enablement domain. You will own CI/CD infrastructure, ensure stability and scale, and drive secure, efficient delivery pipelines for our engineering teams.

You’ll work with GitLab, ArgoCD, Terraform and Kubernetes to empower developers to ship software quickly while reducing operational friction and improving reliability across Mollie’s platforms.

Qualifications

• Experience building and maintaining CI/CD infrastructure
• Strong knowledge of self-hosted operations
• Experience with cloud-native deployments and GitOps (GitLab, ArgoCD)
• Proficiency with Kubernetes, Helm and container tooling
• Familiarity with IaC tools like Terraform and cost-aware resource management
• Excellent problem-solving and cross-functional collaboration skills

Responsibilities

• Oversee health, stability and scalability of Mollie’s CI/CD infrastructure
• Respond to outages and maintain high availability
• Develop and implement CI/CD governance, security and resilience best practices
• Optimize resource usage and developer experience across platforms
• Collaborate with engineering teams to diagnose and resolve tooling issues

Skills

CI/CD

Kubernetes

GitLab

ArgoCD

Terraform

Go/Cloud-native

Observability

Tools

Jenkins

Buildkite

Helm

GoCD

Spinnaker

Job description

Build with usBusinesses deserve better from finance. Less friction, more freedom. Since 2004, Mollie has been on a mission to make payments and money management effortless for every business in Europe.

Today, more than 250,000 companies trust our all-in-one platform to get paid, manage money and grow on their terms. Simple, scalable and built with real businesses in mind.

We're one of Europe's fastest-growing fintechs, with 900+ Mollies across 12+ locations. Our people make this growth possible. We move fast, build with purpose and care deeply about our customers. Whether you're solving problems, building market-leading products or exploring how AI can make work smarter, you'll have the freedom to create and the trust to deliver.

If you're ready to grow, shape the future of fintech and join an ambitious, high-performing team, this is the place for you.

Your impact

Mollie is evolving from a payment processor into a full financial services provider, and our infrastructure needs to be as ambitious as our vision.

As part of our Developer Enablement domain, you'll play a crucial role in shaping the CI/CD infrastructure that drives our continuous integration, developer workflows and deployment pipelines, providing a foundation for rapid and reliable software delivery.

Join us as a Senior Platform Engineer within the Build team, where you’ll be at the forefront of maintaining and optimising our CI/CD tools, ensuring stability, scalability, and efficiency across our platforms. Your work will empower our engineering teams to deliver high-quality software with confidence, enabling our Engineers to build products that will eliminate the financial bureaucracy for our customers.

What you'll ship

Oversee the health, stability and scalability of CI/CD infrastructure to support Mollie's product delivery.

Monitor and respond to outages in those systems to maintain high availability, reliability and operational standards.

Develop, scale and implement strategies, guidelines, and governance of CI/CD systems while future‑proofing their architecture for security, compliance and resilience concerns.

Optimize and balance CI/CD compute and storage usage towards efficient resource usage while keeping developer experience in mind.

Investigate, diagnose, and resolve technical issues related to CI/CD tooling with internal customers, working collaboratively with other engineering teams to minimise to maintain seamless workflows.

What you'll bring

Good grasp of CI Systems and hands‑on experience with Gitlab or similar (such as Jenkins, Buildkite, etc.), with a strong focus on self‑hosted operations.

Some experience with cloud‑native Deployment and GitOps solutions such as Gitlab, ArgoCD or similar (Flux, GoCD, Spinnaker, Harness, etc), with strong focus on self‑hosted operations.

Prior experience with at least one major cloud‑based provider as well as Infrastructure‑as‑Code tools such as Terraform.

Comfortable running, monitoring and developing systems on Kubernetes and using tools like Helm. You're also familiar with cloud‑native container tools and building optimized images.

Good problem‑solving and investigative skills, with a creative approach to tackling challenges using observability and debugging tools.

The ability to work cross‑functionally, communicate effectively, and maintain clear documentation while having a customer empathy mindset towards product and application engineers.

Nice to have

Previous experience with Google Cloud Platform (GCP)

Previous experience building and operating continuous integration with Gitlab.

Previous experience building and operating deployment platforms based on ArgoCD.

Grow your way

At Mollie, growth is personal. We believe everyone should have the chance to develop their skills, explore new challenges and shape their career on their own terms.

You’ll get regular feedback and performance reviews to support your development, with fair and transparent salary reviews along the way. Many Mollies move into new roles or take on new projects to stretch themselves, and we actively hire from within to help you take the next step.

No matter if you're aiming for promotion, exploring a different career path or building new skills, you'll be supported with the tools, trust and opportunities to grow your way.

AI at Mollie

We believe in Always Be Shipping, and AI brings that philosophy to life across every team, every role, every day

AI is core to how we build. It helps us move faster, simplify work and make smarter decisions, creating real impact for the businesses we serve. We're looking for people who are excited to use AI to shape the future of finance with us.

Kindly note that relocation or visa support is not offered for this role.

Enjoy the flexibility to work from abroad for 20 days a year (excl high risk countries)

Enjoy €60 per month net towards taking care of yourself.

Lifestyle and Health Support

Reach out for coaching and support whenever you need it via OpenUp.

26 holiday days

Time to relax. Plus an extra 2 days off in between 27 and 31 December!

Commute options

Receive an NS Business Card and participate in our bike lease plan

Birthday off

It’s your special day! Why spend it at the office?

WFH Equipment Budget

One off budget of €400 for our new hires.

With WFH & Internet allowance at €60 a month.

Discounted Lunch

Hot and cold meals plus snacks available each day for less than €4 and only pay when you use the service!

Health Insurance

Insure with ONVZ or receive €125 net towards your own insurance.

All Mollies get together, connect and have fun.

How we hire

Step 1

Apply

Our Talent Acquisition team and hiring manager will review your application, and respond within 2 weeks.

Step 2

Screening call

If you seem like a Mollie-in-the-making, we’ll invite you to a screening call so we can learn more about each other.

Step 3

Are you the one?

You'll have two or more interviews. And if it's a highly technical role, we'll also assess the specific skills you'll need.