Frontend Software Engineer

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 solutionsCollaborate with cross-functional teams to define requirements and deliver featuresBuild responsive, high-performance user interfaces and reusable components for real-time operational displaysWrite clean, maintainable, and well-documented codeReview code and contribute to shared engineering standards and best practicesTest, debug, and improve software throughout the development lifecycleSupport deployment, monitoring, and ongoing improvement of production systemsAssist with writing operational and technical documentation Professional Requirements University degree in Software Engineering, Computer Science, or a related fieldProfessional experience building production web frontends with TypeScript and React (or a comparable component framework)Strong command of modern JavaScript/TypeScript, HTML5, CSS, and browser fundamentals (rendering, state, async, debugging with browser devtools)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 teamsEnglish language proficiency, both written and verbal Preferred Qualifications At least 3 years of professional experience in software development is preferredFamiliarity with modern build tooling (Vite/Webpack) and modular or plugin-based frontend architecturesExperience 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 ElectronA strong eye for accessibility, usability, and performance in operator-facing UIsA background in the ATM/ATC domain is a plusSolid problem-solving skills and an ability to work independentlyA 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 hr@tern.is.