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Mollie

Online payments platform for businesses

Senior Application Engineer

Backend EngineeringConfirmed live in the last 24 hours
Full-timeLisbon, PortugalNo salary listedIn-person

About the Job

Requirements

  • At least 6 years of experience developing large-scale applications; PHP or Java experience is preferred, and experience with Go, C#, or Python is valued, with willingness to work with PHP or Java.
  • Proven experience leading architectural decisions and technical initiatives, delivering end-to-end solutions, and optimizing processes.
  • Experience mentoring junior developers and implementing strategies to drive team growth and skill development.
  • Ability to communicate effectively with stakeholders and explain complex problems and solutions in simple terms.
  • Creative problem-solving skills, a product-first approach to shaping ideas, and the ability to analyze and resolve complex issues.
  • Ability to take accountability for tasks and proactively identify and improve technical or business processes.

Responsibilities

  • Design and engineer systems that scale to handle high transaction volumes.
  • Develop customer-focused products by shaping, building, testing, and measuring feature performance from idea through final solution.
  • Guide and support junior team members through mentoring, knowledge-sharing, and hands-on collaboration.
  • Lead technical initiatives from architecture design through implementation, ensuring engineering excellence.
  • Resolve complex issues and contribute to making financial processes effortless.
  • Create comprehensive documentation to facilitate domain knowledge sharing and establish optimized processes.
  • Own code quality, engineering excellence, and best practices across systems.

Desired Qualifications

  • Consistently deliver customer value while balancing speed and quality.

About the Company

Mollie

Online payments platform for businesses

Mollie provides a payments and money-management platform for European businesses, enabling online and in-person payments, recurring billing, fraud prevention, and basic financial services like business accounts and financing. Merchants integrate Mollie to accept multiple payment methods (cards, PayPal, SEPA, iDEAL) via a simple onboarding and a unified dashboard; payments run on a transaction-based model with tools like hosted checkout and Tap for in-person payments. The platform supports many European markets with local and international methods and a single interface for managing payments and reconciliation. Its goal is to help European businesses grow revenue by making payments easy, reliable, and scalable across channels and countries.

Company size
1,001-5,000
Company stage
Series C
Total funding
$865M
Headquarters
Amsterdam, Netherlands
Founded
2004

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