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Senior Back-end Engineer (RoR/ Node.JS)

Creating a better language learning experience

Job details

  • Full-time
  • map markerBerlin, DE
  • globeRelocation paid
  • cardRequires Work Permit
    Requires that you're a citizen or have a valid work permit / visa sponsorship to work in the country in which this position is based.
  • routeSenior
  • routeEnglish
    Preferred spoken language

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Founded in 2007, Babbel is the world’s top-grossing and most effective language-learning app. No small feat, and no small challenge. In a moment rife with talk of walls, we’re building bridges — making the language-learning journey as exciting and empowering as possible, helping people forge new connections and participate in worlds bigger than their own. We do things that matter. And foremost, we make people speak their new language as they’ve always wanted to. Come work with us.

Babbel is for everyone, not some niche or elite strata of learners. Everyone. As our user base has grown, so has what they need from us. Their learning needs, life experiences, and reference points become more varied and colourful by the day. Meeting that means ensuring users see themselves reflected —not just in our product— but the world it allows them to imagine with us. That means reflecting the dynamism and diversity of our users, as much as possible, in the production of Babbel. We currently have 600 people from more than 50 nationalities working in our Berlin and New York offices, challenging and learning from each other at every step. A culture of difference and dignity is critical to how we’ve connected with millions of users, in every hemisphere

We are looking for experienced Back-end Engineers to join our Infrastructure teams.

Your responsibilities will be:

  • Deliver high-quality web applications from designing and iterating new features into production in short sprint cycles
  • Independently build, maintain and take on ownership of complex software modules and services
  • Collaborate cross-functionally to inform API design and architectural decisions
  • Maintain and make use of a good overview of the overall technology stack and infrastructure
  • Shape, facilitate and survey coding guidelines and quality standards
  • Understand and take ownership the system performance and health
  • React, troubleshoot and solve operational events (bugs and incidents)
  • Independently focus on continuous learning and improvement and drive the evolution of our engineering practices

Main requirements

  • Experience with Ruby (RoR) and/or Node.JS
  • Proven experience in at least one other server-side framework
  • Knowledge in building scalable distributed systems and architectures
  • high-quality in testing on different levels: unit, integration, contract and E2E
  • Experience with monitoring systems
  • Experienced in the maintenance of complex code bases and driving down technical debt
  • Solid understanding of lean and agile practices
  • Fluency in written and spoken English

Nice to have

  • Experience in using cloud services (ideally AWS)
  • Experience with NoSQL databases (DynamoDB, MongoDB)
  • Experience with any infrastructure as code tool (ideally Terraform)
  • Basic knowledge of statistics necessary to set up and understand metrics


  • We’re driven by a bold challenge
  • We solve meaningful problems - at scale
  • Diversity and difference are our strengths; lifelong learning is our life’s blood
  • Work within a high-performing team at Babbel
  • Tackle a steep learning-curve – personally and professionally
  • Work in a challenging environment and where you’re expected to bring your game face
  • Take advantage of a lively startup atmosphere with friendly working hours
  • Draw from a vibrant international company with people from over 50 different nationalities
  • We offer great company benefits (high-end company bike, fresh fruit & drinks)

Apply now

Sign up to apply

Or sign up to refer and earn a reward of €300