Senior Software Engineer

Sorry, this job was removed at 08:24 p.m. (UTC) on Thursday, Sep 03, 2026
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Gdańsk, Województwo pomorskie, POL
Hybrid
Senior level
Blockchain • Fintech • Payments • Consulting • Cryptocurrency • Cybersecurity • Quantum Computing
We are a global technology company in the payments industry.
The Role
Develop and maintain Mastercard’s Open Banking platform, building secure C#/.NET and ASP.NET APIs for bank connectivity, account information, and payment initiation across Europe. Deploy and support cloud solutions on Azure while applying modern software development practices, automated testing, version control, CI/CD, and Azure DevOps. Collaborate with distributed engineering teams, solve complex API security and data-processing challenges, and potentially provision infrastructure using Terraform.
Summary Generated by Built In
Our Purpose
Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we're helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential.
Title and Summary
Senior Software Engineer
Overview:
Software engineers working on Mastercard's Open Banking platform play a key role in the development and maintenance of the products that secure high quality connectivity to banks across Europe. Building on the strong foundation of our state-of-the-art bank connectivity APIs, the engineers create turn-key solutions that take the burden of handling account information and payment initiation services from customers that want to spend their efforts building great products that leverage the full potential of the Open Banking standard.
Role:
Open Banking engineers work at the bleeding edge of the account information and payment initiation technologies, often solving problems that are yet to be tackled within the industry in areas of API security, data accessibility, processing, and analysis. You will be joining a group of highly skilled individuals working together as a team to push the limits of what is possible to achieve with open banking.
You will have many colleagues around different countries, with your nearest peers being located primarily in Denmark and Poland.
About you:
We are looking for motivated individuals that are looking to be a part of a newly formed team comprised of both industry veterans as well as newcomers. What they all have in common is the understanding that in order to achieve great things, being able to work together as a team is a must.
You will be spending most of your time in the Microsoft domain, meaning APIs built in C# with .NET (latest version) and ASP.NET deployed to the cloud (Azure). Deep knowledge of at least some of these areas is a requirement. However, we believe that learning is a part of the job, so if you for example have extensive experience building ASP.NET apps, but not in the cloud, do not hesitate to apply regardless.
Beyond that, it is expected that you have experience building software using modern development standards, meaning it should not come as a surprise that we utilise all the tools at our disposal from standard ticketing systems (Azure DevOps), VCS, test automation, to CI/CD pipelines.
Additionally, if you have experience with provisioning infrastructure as code (Terraform) as well as interest in computer security (Certificates, HTTPS) it would be a great benefit. Prior experience from working in closely regulated industries (financial, medical, etc.) is welcome, but not required.
And above all, we hope that you love solving problems!
Corporate Security Responsibility
All activities involving access to Mastercard assets, information, and networks comes with an inherent risk to the organization and, therefore, it is expected that every person working for, or on behalf of, Mastercard is responsible for information security and must:
  • Abide by Mastercard's security policies and practices;
  • Ensure the confidentiality and integrity of the information being accessed;
  • Report any suspected information security violation or breach, and
  • Complete all periodic mandatory security trainings in accordance with Mastercard's guidelines.

Skills Required

  • Deep knowledge of C#, .NET, or ASP.NET development
  • Experience building software using modern development standards
  • Experience with APIs and software development
  • Experience with test automation and CI/CD pipelines
  • Experience with cloud deployment, preferably Microsoft Azure
  • Experience with infrastructure as code using Terraform
  • Interest or experience in computer security, certificates, and HTTPS
  • Prior experience in regulated industries such as financial or medical services

What the Team is Saying

Jenny
Mastercard

Mastercard Compensation & Benefits Highlights

  • Retirement Support Retirement plans are presented as best-in-class with a high company match on 401(k) or local equivalents. Career materials and U.S. postings consistently highlight retirement matching as a standout feature.
  • Leave & Time Off Breadth U.S. postings describe generous paid time off including vacation, personal days, holidays, sick/safe time, and additional bereavement leave. A hybrid policy and a limited “work from elsewhere” option further support time away.
  • Parental & Family Support Company pages state a global minimum of 16 weeks of paid new-parent leave across birth, adoption, and foster, plus family-building assistance where permitted. Mental-health resources and caregiving supports are also emphasized.

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The Company
HQ: Purchase, NY
38,800 Employees
Year Founded: 1966

What We Do

Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we’re building a resilient economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential.

Why Work With Us

We live the Mastercard Way: creating value in the communities we touch, growing together through the opportunities we see, and moving fast to innovate and scale. Our collaborative culture and our passionate people are the key to what we do, driving meaningful change as one team and connecting everyone to priceless possibilities.

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Employees engage in a combination of remote and on-site work.

In our ongoing workplace evolution, we’ve introduced hybrid work, Work-From-Elsewhere Weeks and Meeting-Free Days.

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