Senior Frontend Developer (TeamCity)

Jetbrains

Belgrade, Serbia; Berlin, Germany; Limassol, Cyprus; Munich, Germany; Paphos, Cyprus; Prague, Czech Republic; Warsaw, Poland; Yerevan, Armenia (Belgrade, Berlin, Limassol, Munich, Paphos, Prague, Warsaw, Yerevan) permanent

Posted: March 9, 2026

Required Skills

Job Description

At JetBrains, code is our passion. Since 2000, we’ve been building tools that help developers focus on what really matters. TeamCity is our CI/CD platform trusted by over 30,000 organizations worldwide – from small teams to large enterprises running thousands of builds and pipelines daily.

For almost 20 years, TeamCity has evolved alongside the CI/CD landscape. Today, we’re modernizing the product’s architecture and elevating the user experience of a large, mature system while continuing to expand its capabilities. We’re currently looking for a Senior Frontend Developer who’s excited by complex, non-trivial UI challenges and eager to shape the future of TeamCity’s frontend.

In this role, you will:

• Develop new features, fine-tune existing ones, and write tests.

• Improve the performance and responsiveness of real-time UI with large datasets.

• Participate in frontend architecture decisions and help evolve the system over time.

• Maintain and enhance legacy code.

• Collaborate closely with UI/UX designers.

• Contribute actively to team discussions and decision-making.

We’ll be happy to have you on our team if you:

• Are proficient in TypeScript, HTML5, CSS3, and React.

• Have a solid understanding of JavaScript internals, as well as browser and DOM APIs.

• Know how to identify and solve performance problems at both component and architectural levels.

• Possess an excellent grasp of testing principles and best practices.

• Have foundational knowledge of algorithms and complexity.

• Are comfortable taking ownership and initiative.

• Can communicate clearly in English, both in writing and verbally.

We’d be especially thrilled if you:

• Have experience designing extensible frontend systems or working with plugin-based architectures.

• Understand how design delivery works and enjoy partnering with designers.

• Are familiar with React internals.

• Are passionate about the problem space and want to actively shape the product, rather than just deliver features.

• Bring strong interpersonal skills and a deep understanding of how high-performing teams operate, valuing feedback and open collaboration.

Our tech stack:

We use React 19+, Redux (Toolkit and RTK Query), TypeScript, GraphQL (Relay), and TeamCity REST.

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