Senior .Net dev with Azure DevOps w Kraków, Polska

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

Must have

Minimum 10 years of professional experience as a .NET developer (C#), with a proven track record on long-term projects

Strong hands-on experience with Azure DevOps (repos, boards, pipelines, CI/CD)

Proven ability to act as a technical lead: advising, guiding, and mentoring a development team

Experience building new platforms or major systems from the ground up

Experience in automated testing of .NET applications

Clean coding skills

Excellent problem-solving abilities

Experience in RESTful API design

Familiarity with agile development practices (Scrum, Kanban, etc.)

Good communication skills and the ability to clearly state requirements to other teams

Nice to have

.

Other

Languages

English: C1 Advanced

Seniority

Senior