About this role
Project description
We are looking for a senior .NET developer to join our client's team and lead the build of a new data and application platform. You will replace a highly experienced developer, advise and guide the team, and set technical direction and standards. The team focuses on clean code, agile methodologies, and high-quality delivery. The client is from the investment banking industry.
Responsibilities
- Design, develop, and maintain scalable back-end services and APIs using .NET (C#)
- Build and optimize data pipelines and workloads on Databricks
- Design, implement, and maintain CI/CD pipelines and release processes in Azure DevOps
- Advise and guide the team on architecture, design decisions, and best practices while the new platform is built
- Mentor developers and raise the technical level of the team through code reviews and pair programming
- Define and consume RESTful APIs, clearly communicating requirements and constraints across teams
- Translate business and product requirements into robust technical solutions
- Apply clean code principles and contribute to continuous improvement of engineering standards and tooling
- Write and maintain automated tests (unit, integration)
- Participate actively in agile ceremonies (Scrum/Kanban), including refinement, planning, reviews, and retrospectives
- Work closely with QA, product managers, and architects to ensure high-quality, business-aligned deliveries
- Support and improve existing applications in a fast-paced, enterprise investment-banking environment
Skills
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Must have
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Minimum 10 years of professional experience as a .NET developer (C#), with a proven track record on long-term projects
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Strong hands-on experience with Azure DevOps (repos, boards, pipelines, CI/CD)
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Proven ability to act as a technical lead: advising, guiding, and mentoring a development team
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Experience building new platforms or major systems from the ground up
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Experience in automated testing of .NET applications
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Clean coding skills
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Excellent problem-solving abilities
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Experience in RESTful API design
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Familiarity with agile development practices (Scrum, Kanban, etc.)
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Good communication skills and the ability to clearly state requirements to other teams
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Nice to have
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.
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Other
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Languages
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English: C1 Advanced
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Seniority
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Senior
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Krakow, Poland