Senior Fullstack Engineer (all genders)

FriendsAbroad; Berlin; Vor Ort; EUR 65.000 - 85.000; Vollzeit

Zusammenfassung

A leading tech company in Berlin is seeking an experienced Senior Fullstack Engineer to drive backend architecture and development for engagement-focused features. You will be responsible for building scalable systems using Go and TypeScript, designing APIs, and supporting frontend initiatives as needed. The ideal candidate has 5+ years of backend development experience, proficiency in AWS, database expertise, and excellent communication skills. Join a diverse team dedicated to creating language learning solutions.

Leistungen

30 vacation days

Flexible working hours

Jobbatical stays of up to 3 months

Yearly learning & development budget

Full access to language learning resources

Mobility benefits

Discounted Urban Sports Club membership

Qualifikationen

• 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.
• Excellent English communication skills for our international team.

Aufgaben

• Architect and build robust backend systems using Go and TypeScript.
• Design and implement APIs for progress visualization and motivational features.
• Develop serverless solutions using AWS Lambda.
• Support frontend development, contributing to React features.
• Collaborate cross-functionally with team members.

Kenntnisse

Backend development experience

Go expertise

TypeScript/Node.js

AWS proficiency

Database optimization

API design experience

React awareness

Testing mindset

User-focused approach

System design skills

Communication skills

Tools

AWS Lambda

SQL databases

NoSQL systems

React

TypeScript

Jobbeschreibung

Overview

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.

Responsibilities

• 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 end-to-end 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

Qualifications

• 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
• 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

Benefits (Some Perks)

• Enjoy 30 vacation days, and family and life situation counseling
• Flexible working hours and the option to work from our fully equipped office
• Jobbatical stays of up to 3 months inside the EU and the UK
• Yearly learning & development budget for external training
• Full access to Babbel for free language learning
• Mobility benefits and a discounted Urban Sports Club membership
• Be part of our DE&I Community Networks (such as FLINTA in Tech, and Queer Collective)

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.

How to Apply

Interested in this position? Please submit your resume and cover letter through the application portal.