All offersWarszawaNetSenior Fullstack .NET Developer
Senior Fullstack .NET Developer
Sigma IT Poland

Senior Fullstack .NET Developer

Sigma IT Poland
Type of work
Employment Type
Permanent, B2B
Operating mode

Tech stack

    Payment Integration

Job description

Online interview

Sigma IT Poland is a division within NEXER GROUP - a custom software development company. We started in Poland in 2017 and are now a team of over 180 people with offices in Wrocław, Warsaw, and Cracow. We have the opportunity to work with world-renowned brands from Scandinavia, the UK, and Western Europe. Our goal is to grow stronger, in competence rather than in numbers. If you like what we do, check out our offer, maybe we will have the pleasure of meeting you! 😊

We are looking for Senior Fullstack .NET Developer* who can join our team in a short period of time. This position offers an exciting opportunity to contribute to the advancement of educational technology while working in a collaborative and innovative environment.

*If you specialize only in backend development in .NET, you are also welcome to apply!

Key Responsibilities:

  • Develop and maintain HTTP APIs to support suite of educational products.
  • Integrate payment systems, such as Stripe and Apple, to facilitate seamless transactions within our platforms.
  • Implement and optimize cloud infrastructure on Digital Ocean to ensure scalability, reliability, and performance.


  • At least 8 years of experience as a Full-stack .NET Developer, with a strong focus on both front-end (React) and back-end (.NET) development.
  • Experience with EPI server.
  • Demonstrated expertise in Cloud Engineering, specifically with Digital Ocean.
  • Proficiency in HTTP APIs, including design, implementation, and documentation.
  • Solid understanding of payment integration, particularly with Stripe and Apple.
  • Strong problem-solving skills and ability to troubleshoot complex issues independently.
  • Excellent communication and teamwork skills.
  • You live in Poland.

We offer a choice of employment form: B2B or Employment Contract

  • UoP: 16 - 19 000 PLN gross/month
  • B2B: 130 – 150 PLN net/hour + VAT

By joining us, you gain the following:

  • Opportunity to work on exciting, international projects in cutting-edge industries like Automotive, Biotech, IoT;
  • Possibility to develop in cloud technologies. We are a certified AWS partner;
  • Becoming part of a team that believes that the next step to a promising future is to put your heart into it and make it happen;
  • Respect for your private life so you don't have to work overtime or on weekends;
  • Team Events budget to socialize outside of work;
  • Company Events to celebrate smaller and bigger successes (Summer Party, Programmer's Day, and trips abroad – so far we've been in Cape Town, Are, and Barcelona).

Perks and benefits:

  • Fully remote work or in our office in Wrocław, Warsaw or Cracow;
  • Free benefits such as Luxmed, Multisport, and life insurance in Nationale Nederlanden;
  • Attractive referral system (9,5k for senior, 6k for mid, 2,5k for junior);
  • Personal Training Budget with additional paid hours;
  • Passion Day - an extra day off for your hobby to spend as you please;
  • Flexible working hours with no micro-management approach. Our core hours are 9-15, the rest of the working time is up to you;
  • We provide high-quality work equipment + 2 additional monitors and accessories.

If you apply for this position and match our expectations, then:

1) You will be invited to an HR Screening with our IT Recruiter.

2) You will have a technical interview.

3) You will meet with a client.

Submit your application online in one easy step! Apply now!