Senior Fullstack Engineer - 1-year parental leave cover (all genders) at Babbel

We are looking for a Senior Fullstack Engineer, 1-year contract to join our Tech Team! As a Senior Fullstack Engineer, your mission will be to shape the future of language learning in a flexible and stimulating environment. You’ll collaborate with motivated colleagues, dive into different disciplines, broaden your expertise, and share your knowledge. You will • Deliver value iteratively by building high-quality applications and features • Build, maintain, and take ownership of a rich ecosystem of applications and services • Own architectural design and constantly propose improvements of the existing services • Ensure that the systems you own are healthy, resilient, and perform well • Collaborate cross-functionally on feature design, architectural decisions, and assessing technical debt • Shape our coding guidelines and quality standards • React, troubleshoot and solve operational events (bugs and incidents) • Focus on continuous learning and improvement and drive the evolution of our engineering practices • Work in a small team and contribute & drive all phases of development • Propose, implement and validate solutions - from prototypes to potentially scaling them (or discarding them) • Maintain and make use of a good overview of the overall technology stack and infrastructure You have • Experience in fast Build-Measure-Learn cycles • Strong sense for good API design and third-party API integrations • Proficient knowledge in JavaScript, Typescript • Nice to have: Python • Experience in using AWS, NoSQL databases • Expertise with AI tooling and infrastructure, including LLM-powered development tools (e.g., Cursor) and agentic AI systems, with the ability to apply them effectively to accelerate engineering workflows and improve productivity. • Knowledge in component-based frontend frameworks, ideally React/NextJS • Knowledge in HTML, CSS (incl. preprocessors and CSS in JS) • Testing experience on different levels: unit, integration, contract, and E2E • Willingness to collaborate with product and business stakeholders in a high trust working environment • A can-do attitude to build MVPs and iterate on them in short cycles • Good understanding of lean and agile practices • Good communication and interpersonal skills • Fluency in written and spoken English Some perks of becoming a Babbelonian: • Enjoy 30 vacation days. Plus family and life situation counseling. • Set up the right schedule for you with flexible working hours and enjoy Jobbatical (up to 3 months working inside the EU and the UK), plus work from our fully equipped office with nap, faith and family rooms. • Learn and grow with the internal learning opportunities, and use a yearly learning & development budget for external training. Learn languages with Babbel for free with your full access to Babbel. • Take advantage of your mobility benefits options and a discounted Urban Sports Club membership. • Be part of our DE&I Community Networks (such as FLINTA in Tech, and Queer Collective), attend cultural and regular social events. Please note that our company’s operating language is English so you will need to be able to work in English. Diversity at Babbel As part of our ongoing journey towards building a diverse, equitable and inclusive company, we welcome everyone to apply, especially those individuals who are underrepresented in tech. We are a learning company, inside and out, and we encourage you to apply even if you do not fit all the technical requirements - all candidates are assessed based on skills, qualifications and on our business needs. Please state your pronouns in your application, and let us know if you’d like to be addressed by a name other than the one appearing on your official documents. If you have a disability or special need, feel welcome to inform us, so that we can provide you with the proper assistance in the application process. Sounds good? We are already looking forward to hearing from you! Check out also our jobs page, our blog and our techblog to get an impression about #lifeatbabbel!