Senior Backend Engineer - Ruby (all genders)

Published on December 15, 2022

Babbel is driven by a purpose: Creating mutual understanding through language. This means building an ecosystem of language learning offerings that helps people connect across cultures. Babbel, Babbel Live and Babbel for Business provide users with the most effective solution to be able to communicate with real people, in real situations. The key is a blend of humanity and technology.
More than 60,000 lessons across 14 languages are hand-crafted by 180+ linguists, with user behaviours continuously analysed to shape and tweak the learner experience. And it works: Studies with Yale University, City University of New York and Michigan State University prove its effectiveness. From headquarters in Berlin and New York, 750 people from more than 65 nationalities represent all the differences that make humans unique. Babbel is the most profitable language learning app worldwide, with more than 10 million subscriptions sold. For more information, visit or download the apps in the App Store or Play Sto
We are looking for a Senior Backend Engineer to join one of our Ruby engineering teams!
You will:
  • Deliver value iteratively by building high-quality services and tools
  • Build, maintain, and take ownership of core platform services and tools for internal use
  • Own architectural design and constantly propose improvements to the overall architecture
  • 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
You have:
  • Experience in building applications using Ruby / Ruby on Rails
  • Knowledge about API design and third-party API integrations
  • Basic understanding of SQL and NoSQL databases (MySQL, AWS DynamoDB)
  • Basic understanding of distributed systems and event-driven architecture
  • Knowledge of analyzing metrics about system health and performance (for example DataDog, CloudWatch, PagerDuty, Rollbar)
  • Testing experience on different levels: unit, integration, etc.
  • Good understanding of lean and agile practices
  • Openness to learning new things and reaching outside your comfort zone
  • Love for an open, inclusive culture that supports learning and encourages collaboration
  • Fluency in written and spoken English
Some perks of becoming a Babbelonian:
  • 30 vacation days and flexible working hours 
  • BVG card or Swapfiets bike 
  • Jobbatical and Sabbatical options
  • Many internal & external learning opportunities to choose from
  • A yearly Learning & Development budget
  • Visa and relocation assistance 
  • Full access to Babbel & Babbel Live classes 
  • Modern office in the heart of buzzing Berlin equipped with a family, music, faith and nap rooms 
  • Various internal communities to be part of including the Femgineers, DEI Ambassadors, Accessibility & Disability Group and more
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 at the beginning of 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 our jobs page, our blog, and our techblog!