Senior Software Engineer - C#/NET Backend, Hybrid & Growth

SimCorp; Warszawa; Hybrid; PLN 240,000 - 360,000; Full time

Benefits offered by this job

Hybrid workplace

Bonus scheme

Pension

Job summary

SimCorp is seeking a Senior Engineer to contribute to the Private Debt module, primarily working with APL today and expanding C#/.NET work over time. You will mentor peers, design backend systems and ensure quality with automated testing, CI/CD, and robust architectural patterns.

Ideal candidates have strong object-oriented design skills, experience in APIs and Azure, and a collaborative, international mindset.

Qualifications

• Bachelor's degree in computer science, information technology, or a related field.
• 3+ years of software development experience.
• Strong engineering fundamentals: object-oriented design, architecture patterns, clean code, and pragmatic problem solving.
• Solid experience in C#/.NET (Core/Framework) and building backend systems (APIs, services, integrations).
• Familiarity with APIs (REST/streaming patterns) and messaging concepts (e.g., service bus patterns).
• Proficient understanding of code versioning tools such as Git.
• Experience with automated testing and CI/CD, plus strong code review habits.
• Strong problem-solving skills and the ability to work independently and as part of a team.
• Comfortable collaborating with multiple stakeholders and communicating clearly in an international environment.

Responsibilities

• Contribute to designing and developing backend systems in APL (current core).
• Guide engineers through code reviews, technical planning and agile ways of working.
• Partner closely with Product and engineering peers to deliver outcomes that matter, fast feedback, reliable delivery and maintainable code.
• Drive code quality and reliability via unit testing, integration testing, CI/CD and pragmatic engineering standards.
• Identify performance bottlenecks and bugs and devise sustainable solutions.
• Use Git-based workflows and work effectively in a continuous integration environment.
• Collaborate with cross-located teams and contribute to shared ways of working across sites.
• Require excellent business and communication skills and to be able to understand client specific requirements.

Skills

C# / .NET

Object-oriented design

REST APIs

Unit testing

Azure

Git for versioning

Architectural patterns

CI/CD

Team collaboration

Education

Bachelor's degree in computer science

Tools

Git

Job description

SimCorp is seeking a Senior Engineer to contribute to the Private Debt module, primarily working with APL today and expanding C#/.NET work over time. You will mentor peers, design backend systems and ensure quality with automated testing, CI/CD, and robust architectural patterns.

Ideal candidates have strong object-oriented design skills, experience in APIs and Azure, and a collaborative, international mindset.