Senior Full-Stack Engineer - Java & React Job at Mastercard (Gdansk)

Senior Full-Stack Engineer - Java & React

Mastercard

Location:
Poland , Gdansk

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Not provided

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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 built in Java to engaging front‑end experiences using React—partnering closely with designers, product managers, and architects to bring ideas to life. You will contribute to Connect, the frontend component of our Open Banking Payment and Data applications, helping to drive innovative solutions in pursuit of a world beyond cash. This role requires strong backend engineering expertise (Java), robust frontend development skills (React), and the ability to collaborate across disciplines to deliver secure, scalable, and accessible software aligned to Mastercard’s highest standards.

Job Responsibility:

Plan, design, and develop full‑stack solutions that align with Mastercard’s engineering standards, processes, and best practices
Build and maintain scalable backend services and APIs within Mastercard’s Open Finance ecosystem using Java
Collaborate with UI/UX designers to implement responsive, accessible user interfaces using React
Ensure that front‑end applications meet WCAG accessibility guidelines, deliver exceptional performance, and are optimised for multiple devices
Ensure high code quality through unit/integration testing, peer reviews, and CI/CD pipelines
Contribute across the full software development life cycle—from requirements gathering to release and ongoing support
Troubleshoot, debug, and resolve production issues, ensuring service resilience and performance
Mentor and support junior engineers, fostering knowledge sharing and continuous improvement
Partner with product owners and stakeholders to prioritise features, communicate progress, and manage technical trade‑offs
Stay current with emerging technologies, frameworks, and best practices across frontend and backend engineering

Requirements:

5+ years of software engineering experience across backend and frontend development
Strong hands‑on experience with Java, plus proficiency in React
Experience with .NET is welcome but not required
Solid experience building RESTful APIs, microservices, and working in cloud environments (AWS, GCP, or Azure)
Strong understanding of UI/UX principles, responsive design, and accessibility standards
Demonstrated experience collaborating with designers and product teams to deliver user‑centric products
Knowledge of modern engineering practices: CI/CD, automated testing, code reviews, Agile/Scrum
Excellent communication and stakeholder‑management skills, with the ability to translate between technical and business needs
Proactive, detail‑oriented, accountable, and comfortable working independently in a fast‑paced environment

Nice to have:

Bonus: Experience in Open Finance, payments, or regulated financial services

Additional Information:

Job Posted:
March 04, 2026

Employment Type:

Fulltime

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