Democratising investing across Europe.
Senior Frontend Engineer – Kotlin, Frontend Core
Location
Germany
Posted
67 days ago
Salary
0
Seniority
Senior
Job Description
Senior Frontend Engineer – Kotlin, Frontend Core
Trading 212
• Own and evolve our monorepo, ensuring it stays healthy, performant, and easy to work in as the codebase grows • Design, build, and maintain CI/CD pipelines for React Native and web targets, driving reliability and fast feedback loops for the engineering team • Author and maintain shared TypeScript libraries — state management patterns, networking layers, error handling utilities — consumed across all frontend products • Own the mobile release process end-to-end, including Android build configuration, versioning, and deployment automation • Integrate and maintain observability tooling (Sentry, Amplitude) at the platform level, so product teams get reliable instrumentation out of the box • Identify and resolve build bottlenecks, dependency issues, and tooling gaps that slow down engineering velocity • Collaborate closely with product frontend teams to understand their pain points and translate them into platform improvements
Job Requirements
- At least 4 years of professional experience in frontend or mobile engineering, with a meaningful portion spent on platform, infrastructure, or developer tooling work
- Production-grade TypeScript - strong typing discipline, not just familiarity
- Hands-on React Native experience in a production app, including an understanding of the native layer
- Practical Kotlin experience on Android - native modules, build configuration, or Android-side CI/CD work
- Direct involvement in CI/CD pipeline ownership or significant contribution — mobile or frontend, any tooling
- Ability to think in systems and write code for other engineers, not just end users
- Comfortable working autonomously and making decisions without waiting for full consensus
Benefits
- Challenges that will help you grow and realise your potential
- Opportunity to make a big Impact - you will build innovative services used by millions of investors to build wealth
- Work with smart, spirited, helpful, high-performing colleagues with a common goal
- An environment where nothing is set in stone
- Appreciation for your talent and ideas
- Generous remuneration package including annual bonuses
- Excellent social benefits package, including private health insurance, sports card and 25 days of paid vacation per year
- Delicious treats and a spacious game room
Related Guides
Related Job Pages
More Backend Engineer Jobs
• Garantir o funcionamento dos sistemas de automação, instrumentação e controle da Central Hidrelétrica • Realizar inspeções, calibrações, manutenções e programação em PLC, SCADA, HMI, RTUs e relés de proteção • Monitorar a operação dos sistemas, identificando falhas, investigando causas e implementando ações corretivas • Executar e acompanhar ordens de serviço, manutenções programadas e atualização dos sistemas de gestão • Supervisionar equipes próprias e terceiros em atividades de manutenção e melhoria • Cumprir e fazer cumprir os procedimentos de segurança, saúde e meio ambiente
• Write well-designed, testable, and efficient code with proper test coverage • Participate in code reviews and collaborate with other engineers to ensure code quality and consistency • Maintain current components and technical documentation, suggesting updates as needed • Remain up-to-date on all current best practices, trends, and industry developments
Role Description Du bist überzeugt, dass innovative Technologie und Software gesellschaftlich relevante Themen unterstützt, verändert und vorantreibt? Das sind wir auch! - Unsere Kund*innen sind vielfältig. Unsere Software Projekte ebenso. - Wir lassen die großen Visionen unserer Kund*innen Wirklichkeit werden und helfen ihnen dabei die Digitalisierung in Deutschland voranzutreiben. - Wir setzen auf unsere Begeisterung für Software-Engineering, Open Source und agiles Mindset. - Du denkst dich mit Begeisterung in die fachlichen Fragestellungen unserer Kund*innen ein und findest innovative Lösungen. - Du konzipierst und implementierst gemeinsam mit deinen Teamkolleg*innen User Stories in Java. - Du entwickelst automatisierte Tests, um die Qualität des Codes zu gewährleisten. - Du führst Code Reviews im Team durch und arbeitest im Pair Programming, um die Qualität zu verbessern und Know-How zu verteilen. - Du verwendest und optimierst die im Team etablierte Continuous Integration / Continuous Delivery Pipeline. Qualifications - Ein abgeschlossenes Studium oder eine vergleichbare Ausbildung im Bereich Informatik. - Gute Kenntnisse in der Entwicklung von Anwendungen mit Java unter Einsatz von aktuellen Frameworks wie Spring Boot, o.ä. und Werkzeugen wie Jenkins und GIT. - Erfahrung mit Kubernetes, Docker oder Podman in einer Cloud Umgebung sind wünschenswert. - Grundverständnis zum Thema Containerisierung sowie Interesse an DevOps. - Lust auf agiles Arbeiten sowie Motivation dich kontinuierlich mit neuen Technologien und Trends auseinanderzusetzen. - Sehr gute Deutschkenntnisse (mind. C1). Benefits - Du arbeitest mit namhaften Kund*innen an gesellschaftlich relevanten und innovativen Projekten. - Du bist Teil eines selbstorganisierten Teams im agilen Umfeld mit hoher Eigenverantwortung. - Durch das breite Technologiespektrum und die Vielfältigkeit unserer Projekte und Kund*innen hast du die Möglichkeit, dich stetig weiterzuentwickeln. - Du trittst in ein wachsendes Unternehmen mit langfristiger Perspektive ein. - Um optimale Arbeitsbedingungen zu ermöglichen, setzen wir uns für dich und deine Familie ein. - Umfangreiche Benefits runden unser Angebot ab. Contact - Andre Lämmlen, HR Manager - karriere@seitenbau.com - Jonas Moser, HR Manager - karriere@seitenbau.com - Marie Braun, HR Manager - karriere@seitenbau.com
Backend Developer – Payment
Engineering System and Technologies SARLWe shape the mobility of tomorrow.
• You develop and operate scalable backend systems based on C#. • You design and implement payment processes with a focus on integrating Stripe. • You develop solutions for automated billing processes and ensure their reliable operation. • You integrate existing billing systems into the backend landscape and optimize the related interfaces. • You contribute to the further development of backend architectures and technical standards.


