Backend Engineer - Payments Team

Fastned; Amsterdam; On-site; EUR 65,000 - 90,000; Full time

Benefits offered by this job

Stock option plan

Pension plan

€3,000 training budget per year

EV fleet access (private use)

29 holidays + mission days

Parental coaching support

Women's health collaboration

Lunches provided

Annual trip abroad

Flexible working hours

Travel compensation

Working gear of your choice

Job summary

Fastned in Amsterdam is seeking a Backend Engineer for the Payments team to design, build and operate scalable payment services for across 23,000+ sessions daily.

You’ll work with Kotlin/Java, Spring Boot and AWS, owning microservices from discovery to production, with a strong focus on reliability and real-time payments. You’ll collaborate with product and finance, in a fast-growing international scale-up.

Qualifications

• 3+ years of professional backend experience with Kotlin and/or Java.
• Experience in the payments domain.
• Experience in agile teams in an international environment.
• Experience building and operating microservices in production using REST APIs, cloud platforms and relational databases.
• Familiarity with event-driven architectures (Kafka).
• Care about reliability and operational impact of software.
• Ability to use AI tooling in engineering workflow with good judgement.
• Fluent in English and aligned with Fastned’s mission.

Responsibilities

• Design, develop, test and review reusable, scalable backend code.
• Work AI-first: integrate AI tooling as part of engineering workflow.
• Own features from discovery to post-production.
• Take operational responsibility including monitoring and incident analysis.
• Help improve engineering methodologies and best practices.

Skills

Backend experience

Kotlin/Java

Payments domain

Agile teams

Microservices

REST APIs

Cloud platforms

PostgreSQL

Kafka

AI tooling

English fluency

Tools

Kubernetes

Terraform

GitLab CI/CD

PostgreSQL

AWS

Job description

Join a fast-growing, listed company with a purpose! Fastned owns and operates a network of 400+ fast charging stations across 10 European countries, allowing electric vehicle drivers to charge their car with 100% green energy in just 15 minutes. Our goal is a European network of 1000 fast charging stations in prime locations, where all electric vehicles can charge with renewable energy from the sun and wind. We have recently been voted best charging network in the UK, France and the Netherlands. If you want to make a difference and work in an informal, international scale-up environment with future prospects, then read on!

Your role

Fastned aims to accelerate the transition towards sustainable mobility by giving fast charging to electric drivers. Part of that mission is making car charging as simple as charging your phone, and paying for it should be just as effortless. As a Backend Engineer in the Payments team, you will help make paying for a charge frictionless, secure and reliable. Drivers can pay through the Fastned app, by QR code or with a contactless card at the charger.

The team owns Fastned’s payments domain end to end. That covers integrations with payment service providers and payment terminals. It also covers the services behind payment methods, wallets, pre-authorisation and session payments, billing, invoicing and dunning. The stakes are high: Fastned handles 23,000+ charging sessions a day, and every one of those payments goes through our systems. We’re now moving towards real-time payments, where each session is paid instantly instead of invoiced later. As we are growing and adding roaming features as a Mobility Service Provider, there are many scale relevant challenges to solve.

We have no legacy systems. You’ll work with Kotlin 2.x, Java 21+, and Spring Boot 4 on most services, AWS, Kubernetes, Kafka, SQL (Postgres), Terraform, GitLab CI/CD and REST APIs to build scalable, fault-tolerant services that drivers and our Finance team rely on every day. We encourage responsible AI usage and provide tooling like Claude Code, Codex, Dust.

You’ll work closely with the other product teams, alongside fellow Backend Engineers, Data, Design, an Engineering Manager and a Product Manager in a Scrum setup. This role suits an engineer who enjoys a complex domain, cares about getting the details right, and wants to grow by taking real ownership of business-critical systems.

Your responsibilities include

• Designing, developing, testing and reviewing reusable, maintainable and scalable code
• Working AI-first: using AI-augmented engineering, agentic workflows and AI tooling as a natural part of how you design, build, test and review, with judgement for where AI is a multiplier and where humans stay in the loop;
• Taking ownership from discovery to post-production;
• Taking operational responsibility for what you build, including monitoring, alerting and incident analysis;
• Helping improve engineering methodologies and best practices

Who we are looking for

In order to be successful in this role, you bring a strong sense of ownership and a pragmatic, proactive mindset. You enjoy working in a collaborative scale-up environment where things can change quickly and where taking initiative matters.

Additionally, you tick the following boxes:

• You have 3+ years of professional backend experience, with strong hands-on Kotlin and/or Java experience.
• You have previous experience in the payments domain.
• You have experience working in agile teams within an international, multicultural environment.
• You have experience building and operating microservices in production, using REST APIs, cloud platforms and relational databases.
• You are familiar with event-driven architectures and technologies such as Kafka.
• You care about reliability, maintainability and the operational impact of the software you build.
• You spot opportunities and problems and pick them up yourself instead of waiting for a ticket.
• You use AI tooling as part of your engineering workflow, with sound engineering judgement.
• You are fluent in English and have an affinity with Fastned’s mission.

Join us in building a better future!

We work hard to change the world, but we don't forget to recognise & celebrate our successes, big and small. We focus on work-life balance, provide genuine work flexibility, and have family-friendly policies in place.

Electric mobility is new territory for you? Don’t worry!

As part of your onboarding, you will participate in a series of exciting workshops where you will learn everything about our industry and fast-charging infrastructure.

Our benefits package includes:

• Stock option plan - we believe in shared value creation.
• Pension plan (fully covered by Fastned).
• A training and development budget of €3,000 per year per employee, because development and training are important to us and our sector offers endless opportunities.
• In order to experience and enjoy the EV life, you get access to our fully electric vehicle fleet (all charging expenses covered), which is also for private use.
• 29 holidays. Additionally, we give you two mission days you can use to contribute to Fastned’s mission or to support a cause that is important to you.
• Going the extra mile for parents: We provide you with personalised coaching support before, during, and after parental leave, facilitated by Foundree.
• Understanding women's health is beneficial for all of us, fostering empathy, improving communication, and creating a more inclusive workplace. That's why we teamed up with Flouria, providing you with quick access to a broad range of women's health professionals.
• Daily lunches, snacks & drinks are provided at our office locations.
• Next to fun events year-round, we throw notorious Christmas parties and organise an amazing yearly trip abroad with all employees.
• Other perks include flexible working hours, full travel compensation and the working gear of your choice.

Interested in making an impact?

We would love to have a conversation with you!

Then, it’s time to welcome you on board to Fastned!

Fastned stands for equity and inclusion. We welcome applications from people of all backgrounds, gender identities, sexual orientations, religions, neurodiversity, disabilities, parental status or any other protected characteristic that makes you unique.