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.

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.