We are looking for a Senior Fullstack Engineer to join our Team in Berlin.
Join Babbel's mission to create mutual understanding through language! As a Senior Fullstack Engineer on our cross-functional team, you'll be the driving force behind the systems that power engagement-focused features for millions of language learners worldwide.
You'll own backend architecture and development while occasionally supporting frontend initiatives, working closely with iOS, Android, frontend engineers, and design teams to deliver seamless user experiences. Your work will be the foundation for features that help users visualize their progress and stay motivated on their language learning journey.
You will:
Architect and build robust backend systems using Go and TypeScript that power user engagement and personalization features
Design and implement APIs that serve progress visualization and motivational features across web and mobile platforms
Develop serverless solutions using AWS Lambda and other cloud services to ensure scalability and performance
Support frontend development when needed, contributing to React/TypeScript features to maintain platform parity
Collaborate cross-functionally with product managers, designers, and platform engineers on technical architecture decisions
Own database design and optimization for both SQL and NoSQL systems supporting user progress tracking
Drive testing practices across unit, integration, contract, and E2E levels for backend services
Monitor and optimize system performance, health metrics, and infrastructure reliability
Balance technical debt with delivery speed while maintaining high-quality backend systems
You have:
5+ years of backend development experience with modern distributed systems
Strong expertise in Go and TypeScript/Node.js for building scalable APIs and services
AWS proficiency, particularly with Lambda, serverless architectures, and cloud infrastructure
Database expertise with both SQL and NoSQL systems, including design and optimization
API design experience with RESTful services and understanding of cross-platform requirements
Frontend awareness with React and TypeScript to support occasional frontend contributions
Testing mindset with comprehensive experience across multiple testing levels
System design skills for building engagement and personalization features at scale
Excellent English communication skills for our international team
User-focused approach understanding how backend decisions impact user engagement
Our Tech Stack
Backend: Go, TypeScript/Node.js
Cloud: AWS (Lambda, Kinesis, DynamoDB, RDS, and more)
Databases: SQL and NoSQL systems
Frontend: React, TypeScript (for occasional support)
Testing: Comprehensive testing at all levels
Ready to build the backend systems that help millions of people connect across cultures through language? We'd love to hear from you!
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.
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What We Do
Babbel is the top-selling language learning platform. Driven by our purpose – to create mutual understanding through language – we build products that help people connect and communicate across cultures. Through self-study lessons with Babbel, instructor-led live classes with Babbel Live, Babbel for Business, our own podcast series, and our magazine, our users can focus on using a new language in real situations with real people. And it works: studies with Yale University, City University of New York, and Michigan State University prove that Babbel gets users to speak with confidence. The key is a blend of humanity and technology. More than 60,000 lessons in 15 languages are hand-crafted by more than 200 linguists, and user behaviour is constantly analysed to shape and improve the learner experience. The Babbel team is as diverse as our content. Based in Berlin, Germany, and New York, USA, 1,000+ Babbelonians from over 80 nationalities represent the diverse backgrounds, characteristics, and perspectives that make each person unique. Building genuine connections with our users is what sets Babbel apart, making it the world's leading language-learning platform with more than 16 million subscriptions sold. Founded in 2007 as the pioneering online language learning platform, we've grown steadily over the years. In 2023, Babbel was honoured with a place on Fast Company's list of the World's Most Innovative Companies, ranking 4th in the Education category
