Regular .NET Developer (Card Payment Systems)
full-time•Warsaw
About this role
About the role
We are looking for a Regular .NET Developer to join a team responsible for developing and maintaining core card payment systems - from transaction authorization and settlement to integrations with external payment services.
The systems process hundreds of thousands of transactions daily, so performance, availability and security are key priorities.
Work model: Remote-first with scheduled on-site team meetings (2 days per month in Warsaw).
Responsibilities
- Develop and maintain .NET applications in card payment domain
- Design and implement new functionalities according to business and regulatory requirements
- Integrate systems with external services (REST, SOAP, messaging queues)
- Optimize performance, availability and security of applications
- Cooperate with Analysts, Architects and QA in Agile/Scrum teams
- Participate in SIT/UAT testing, code reviews and preparation of technical documentation
Required skills
- Commercial experience with C# and .NET (Framework / Core)
- Experience with ASP.NET Core, Angular and WebAPI
- Knowledge of Entity Framework, LINQ, Dapper
- Experience with SQL Server (T-SQL) and query optimization
- Knowledge of SOLID principles and design patterns
- Experience writing unit tests (xUnit / NUnit)
- Experience with system integrations (REST, SOAP, JSON, XML)
- Experience working in Agile environment
- Knowledge of Git, CI/CD and TeamCity
Language requirements
- Polish: native or C2 level (required)
- English: professional level enabling work with technical documentation
Nice to have
- Experience in card payments / payment processing domain
- Knowledge of Docker / Kubernetes
- Experience working on high-availability or complex distributed systems
100 zł - 110 zł an hour
Margo Offers:
- B2B cooperation
- Remote working model
- Benefits such as medical care and sports card
- Co-financing trainings, certification exams and post-graduate studies
- Ability to work in an international consulting company on ambitious projects
- Possibility to get involved in outside-project activities with additional remuneration)
- Excellent working atmosphere, integration events
What you'll do
- The Regular .NET Developer will develop and maintain .NET applications in the card payment domain, focusing on performance, availability, and security. They will also design and implement new functionalities and integrate systems with external services.
About MARGO
We believe that financial empowerment should be inclusive and accessible to all. Margo stands as a testament to this belief, breaking down barriers and offering a gateway to new financial possibilities through our Bitcoin ATMs. Whether you’re an experienced enthusiast or crypto curious, Margo’s user-friendly Bitcoin ATMs provide a secure and convenient way to turn your cash into digital currency instantly.
We get how overwhelming it can be to dive into the exciting world of digital currency. We’ve been there, too! That’s why it’s our mission to make this journey as seamless as possible so you can explore and embrace Margo Bitcoin ATMs with ease. Our unwavering pledge is to create and implement best-in-class technology that empowers our users to effortlessly buy and sell digital currency. Your financial independence and peace of mind remain at the heart of everything we do.
Join us in creating a future where money is redefined, and digital currency thrives with endless opportunities. Together, we can unlock a world of financial potential and build a more inclusive and prosperous tomorrow!
Ready to join MARGO?
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Frequently Asked Questions
What does a Regular .NET Developer (Card Payment Systems) do at MARGO?
As a Regular .NET Developer (Card Payment Systems) at MARGO, you will: the Regular .NET Developer will develop and maintain .NET applications in the card payment domain, focusing on performance, availability, and security. They will also design and implement new functionalities and integrate systems with external services..
Is the Regular .NET Developer (Card Payment Systems) position at MARGO remote?
The Regular .NET Developer (Card Payment Systems) position at MARGO is based in Warsaw, Masovian Voivodeship, Poland. Contact the company through Clera for specific work arrangement details.
How do I apply for the Regular .NET Developer (Card Payment Systems) position at MARGO?
You can apply for the Regular .NET Developer (Card Payment Systems) position at MARGO directly through Clera. Click the "Apply Now" button above to start your application. Clera's AI-powered platform will help match your profile with this opportunity and guide you through the application process.