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Senior Full-Stack Engineer

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Mastercard

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Location:
Poland , Gdańsk

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

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Job Description:

As a Senior Full-Stack Engineer, you will design, build, and deliver cutting-edge Open Finance solutions that power Mastercard’s next generation of payment and data products. You’ll work across the entire technology stack – from highly available backend services to engaging front-end experiences – partnering closely with designers, product managers, and architects to bring ideas to life. You will work with Connect, the frontend component of our Open Banking Payment and Data applications and help drive creative solutions in pursuit of a world beyond cash.

Job Responsibility:

  • Plan, design, and develop full-stack solutions that meet business requirements while adhering to Mastercard’s standards, processes, and best practices
  • Collaborate with UI/UX designers to implement responsive, accessible user interfaces with React
  • Ensure front-end applications meet WCAG accessibility guidelines, deliver great performance, and are optimised for multiple devices
  • Build and maintain scalable backend services and APIs, integrating with Mastercard’s Open Finance ecosystem
  • Ensure high code quality with unit/integration testing, peer reviews, and continuous integration
  • Contribute to the full software development life cycle, from requirements gathering to release and ongoing support
  • Troubleshoot, debug, and resolve production issues, ensuring service reliability and performance
  • Mentor junior engineers and promote knowledge sharing across the team
  • Partner with product owners and stakeholders to prioritise features, communicate progress, and manage trade-offs
  • Stay current with industry trends, frameworks, and best practices in both frontend and backend technologies

Requirements:

  • 5+ years of software engineering experience, with proven expertise across backend and frontend development
  • Strong skills in .NET
  • Proficiency in React
  • Experience working with RESTful APIs, microservices, and cloud environments (AWS, GCP, or Azure)
  • Solid understanding of UI/UX principles, responsive design, and accessibility standards
  • Experience collaborating with designers and product teams to bring user-centric solutions to market
  • Knowledge of modern software engineering practices: CI/CD, automated testing, code reviews, Agile/Scrum
  • Excellent communication and stakeholder management skills
  • Accountable, detail-oriented, proactive, and able to work independently in a fast-paced environment

Nice to have:

  • Skills in Java
  • Experience with Open Finance, payments, or regulated financial services

Additional Information:

Job Posted:
January 02, 2026

Employment Type:
Fulltime
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