Frontend Developer

Tern Systems; Warszawa; On-site; PLN 167,000 - 246,000; Full time

Job summary

Tern Systems is recruiting a Software Engineer to design and maintain web-based operator interfaces for mission-critical Air Traffic Control systems. You will develop high-quality frontend code in TypeScript and React, collaborate across disciplines, and contribute to a safety-focused, reliable production stack.

Responsibilities include building responsive UIs, implementing features, writing tests, and helping improve development processes.

Qualifications

• Bachelor's degree in Software Engineering, Computer Science, or a related field.
• Experience building production web frontends with TypeScript and React.

Responsibilities

• Design, develop, and maintain safety-critical software solutions.
• Collaborate with cross-functional teams to define requirements and deliver features.
• Build responsive, high-performance user interfaces and reusable components for real-time operational displays.
• Write clean, maintainable, and well-documented code.
• Review code and contribute to shared engineering standards and best practices.
• Test, debug, and improve software throughout the development lifecycle.
• Support deployment, monitoring, and ongoing improvement of production systems.
• Assist with writing operational and technical documentation.

Skills

TypeScript

React

Automated tests

CI/CD

Cross-functional teamwork

Education

Bachelor's degree in Software Engineering/CS

University degree in related field

Tools

Jenkins

GitLab

Vite

Webpack

Redux Toolkit

Playwright

Job description

We are looking for a Software Engineer to build and maintain the web-based operator interfaces of mission-critical Air Traffic Control systems. You will work in a collaborative team environment, solving complex technical problems while ensuring that our systems meet the highest standards of safety, usability and reliability.

As an ideal candidate

• You have professional experience in frontend software development and a strong understanding of the full software development lifecycle.
• You approach complex problems with a pragmatic, solution-oriented mindset and are comfortable working in safety-critical environments where quality and reliability are paramount.
• You are self-motivated and collaborative, you value knowledge sharing, and you actively contribute to continuous improvement — both in code and in development processes.
• You are able to translate technical concepts into clear outcomes and work effectively within multidisciplinary teams to deliver robust, high-quality systems.

Responsibilities

• Design, develop, and maintain safety-critical software solutions
• Collaborate with cross-functional teams to define requirements and deliver features
• Build responsive, high-performance user interfaces and reusable components for real-time operational displays
• Write clean, maintainable, and well-documented code
• Review code and contribute to shared engineering standards and best practices
• Test, debug, and improve software throughout the development lifecycle
• Support deployment, monitoring, and ongoing improvement of production systems
• Assist with writing operational and technical documentation

Professional Requirements

• University degree in Software Engineering, Computer Science, or a related field
• Professional experience building production web frontends with TypeScript and React (or a comparable component framework)
• Experience writing automated tests — unit and end-to-end (e.g. Vitest/Jest and Playwright/Cypress)
• Experience with CI/CD pipelines and development tooling (e.g., Jenkins, GitLab)
• Excellent communication and collaboration skills within cross-functional teams
• English language proficiency, both written and verbal

Preferred Qualifications

• At least 3 years of professional experience in software development is preferred
• Familiarity with modern build tooling (Vite/Webpack) and modular or plugin-based frontend architectures
• Experience with state management at scale (Redux Toolkit or similar) and a component library (e.g. Mantine, MUI, Chakra)
• Experience with data-visualization or mapping libraries (D3, MapLibre, Leaflet)
• Experience with real-time data (WebSockets) and/or desktop delivery via Electron
• A strong eye for accessibility, usability, and performance in operator-facing UIs
• A background in the ATM/ATC domain is a plus
• Solid problem-solving skills and an ability to work independently
• A user-centric approach combined with the ability and willingness to learn

Who we are

Tern Systems is an established and trusted provider of Air Traffic Management solutions, and operates in a competitive, regulated industry. With over 70 employees, we have nearly 30 years of experience in successful deliveries to customers in Europe and Asia.

What we offer

We offer an international work environment that fosters personal growth, supports training and continuing education, and a family-friendly work environment with flexible work hours. You will be working in close collaboration with colleagues in our headquarters in Iceland and given regular opportunities to travel to Iceland.

Salary range

15000-22000 PLN

Additional information

Applications must be submitted in English, and all applications are stored in accordance with the Icelandic Public Archives Act.

The position requires you to work at our Warsaw office in Poland. We do not offer relocation packages at this point.

To find out more about us, including information about our recruitment process, please visit https://www.tern.systems/. If you have any further enquiries, contact us at [e-mail].