Senior Application Engineer

Mollie; Amsterdam; On-site; EUR 110,000 - 150,000; Full time

Benefits offered by this job

20 days abroad

Wellbeing budget

Lifestyle support

26 holiday days

Commuter benefits

Birthday off

WFH equipment budget

Hybrid working

Discounted lunch

Health insurance

Annual Mollieverse event

Job summary

Mollie in Amsterdam is seeking a Senior Engineer to build large-scale financial products and lead technical initiatives. You’ll shape architecture, mentor juniors, and own code quality across systems that process high transaction volumes, while collaborating with product and design to ship reliable features.

This role emphasizes delivery and engineering excellence, with opportunities to influence go-to-market strategies and expand into new markets as Mollie introduces new products like Mollie

Qualifications

• 6+ years of experience building large-scale applications, preferably in PHP or Java.
• Experience leading architectural decisions and technical initiatives.
• Mentoring junior developers and driving team growth.
• Excellent communication with stakeholders and a product-first mindset.

Responsibilities

• Build large-scale systems able to handle high transaction volumes.
• Develop products customers love by iterating from idea to delivery.
• Mentor junior engineers and share knowledge across the team.
• Lead technical initiatives from architecture design to implementation.
• Resolve complex problems with creative, data-driven approaches.
• Create comprehensive documentation for knowledge sharing.
• Own code quality and engineering excellence across systems.

Skills

6+ years experience

Large-scale apps

PHP/Java

Go/C#/Python

Architectural leadership

Mentoring

Communication

Product-first mindset

Tools

None

Job description

Your Opportunity:

At Mollie, we’re on a mission to make payments and money management effortless for every business in Europe. Serving more than 250,000 businesses across the continent, we aim to cut through financial bureaucracy that hinders great ideas from growing. Our belief is that accepting payments, driving revenue, accessing capital, and managing money should be seamless for our merchants.

As a Senior Engineer, you'll be at the forefront of developing financial products that will shape the future of how businesses manage their finances. Along with expanding into new markets and handling an increasing volume of transactions, Mollie has recently introduced exciting new products to broaden our offering. You’ll have the opportunity to bring your ideas to life and contribute to these impactful projects. Mollie Capital offers easy access to flexible financing, providing funding to support growth and cash flow management. In-person payments, allows merchants to accept payments at their physical stores through our terminal and mobile app. These innovations are just the beginning, enabling Mollie to offer a seamless, all-in-one payment solution and money management platform.

• Senior Application Engineer
• Amsterdam
• Engineering
• Application
• FullTime

What You will Be Doing:

• Building Large-Scale Systems: Designing and engineering systems that can scale to handle high volumes of transactions.
• Developing Products Our Customers Love: Iterating from an idea to the final solution, shaping, building, testing, and measuring the performance of the features our customers love.
• Mentorship: Providing guidance and support to junior team members, fostering their growth through mentoring, knowledge-sharing, and hands‑on collaboration.
• Tech Leadership: Leading technical initiatives from architecture design to implementation, ensuring engineering excellence.
• Problem-Solving: Utilising your creative problem‑solving skills and analytical abilities to resolve complex issues and contribute to our mission of making financial processes effortless.
• Documentation and Knowledge Sharing: Creating comprehensive documentation to facilitate domain knowledge sharing and set up optimised processes.
• Engineering Excellence: Owning the code quality and engineering excellence and best practices of our systems.

What You’ll Bring:

• Always Be Shipping Mindset: It’s about consistently delivering value to customers, where speed and quality go hand in hand.
• 6+ years of experience in developing large-scale applications, preferably with PHP or Java. Experience with Go, C#, or Python is also valued but you are willing to work with PHP or Java.
• Proven experience in leading architectural decisions and technical initiatives, delivering end-to-end solutions, and optimising processes.
• Experience in mentoring junior developers and implementing strategies to drive team growth and skill development.
• Excellent communication skills, with experience working effectively with various stakeholders. Can explain complex problems and solutions in simple terms.
• Creative problem-solving skills and the ability to shape ideas with a product-first approach, as well as analyse and resolve complex issues.
• Ability to hold yourself accountable for your tasks, and show a willingness to proactively identify and improve things, whether technical or business related.

Benefits

• 20 days working from abroad Enjoy the flexibility to work from abroad for 20 days a year (excl high risk countries)
• Wellbeing Budget 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.
• Hybrid working 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.
• Annual Mollieverse event All Mollies get together, connect and have fun.