(Senior) Backend Engineer – Golang

The essentialsTeam: Product & EngineeringStart date: As soon as possibleLocation: Berlin — hybrid, 3 days in the officeWorking language: English (German: a plus)Salary band: Shared before your first interviewYour impactAs (Senior) Backend Engineer at Gymondo, you build and improve the scalable backend systems that power our platform for hundreds of thousands of active users. You work with a modern tech stack, establish new services using clean architecture principles, and help translate legacy concepts into maintainable, future-proof code. Your work directly shapes the technical foundation that enables Gymondo to grow — reliably, efficiently and at scale.What you’ll driveYou build, improve and maintain scalable backend services using Golang and Gin-Gonic, following clean architecture and established design patternsYou design and implement REST APIs following OpenAPI standards, with a focus on clarity, reliability and long-term maintainabilityYou contribute to our microservice architecture — working on reliability, scaling, stateless applications and event-driven systemsYou rebuild legacy concepts and translate them into well-known programming patterns with transparent and maintainable business logicYou develop data-driven features and are involved in all stages of the development process — from design to deploymentYou work on our scalable, automated infrastructure using AWS, Kubernetes and TerraformYou participate in peer code reviews, write unit tests and champion agile development practicesYou share knowledge, discuss better solutions openly and grow together with the teamWhat defines youMust-have4+ years of professional experience in backend-focused development, including infrastructure3+ years contributing to microservice architectures with a focus on reliability, scaling, stateless applications, event-driven systems and clean architecture3+ years designing REST APIs following OpenAPI standardsProven hands-on experience with Golang and Gin-GonicAbility to design proof of concepts and prototypesStandardised coding practices: peer code reviews, unit testing and a preference for agile developmentAn open mindset and genuine interest in state-of-the-art technologies and methodologiesFluent EnglishNice-to-haveExperience with JVM languages (Kotlin / Java) and frameworks such as Ktor, Spring or Node.jsA Product Engineer mindset: balancing technical excellence with business impact, proactively identifying trade-offs that prioritise user value and speed-to-market without compromising long-term system healthStrong communication skills across the Product & Engineering team and additional stakeholdersA collaborative, humble approach — you promote good relationships in your guild and are always willing to learn from othersOur tech stackGolang, Kotlin, Node.js, Java 17 · Gin-Gonic, Ktor, NestJS, Spring Boot · Elasticsearch, MySQL, PostgreSQL, DynamoDB, MongoDB, Redis · Terraform, Docker, Kubernetes · Event-Driven Architecture · AWSBenefitsSuccess requires positive energy. That's why we ensure the right conditions are in place — physically, mentally, and within the team:🏖️ 30 days of vacation per year + Christmas Eve & New Year's Eve as additional paid days off🏠 Hybrid working model — 60% in the office, 40% from home, applicable to all working hours🌍 Up to 4 weeks of work from abroad per year (Berlin-based roles)🏋️ Free Urban Sports Club M membership & access to Nilo Health for mental health and personal development📱 Free access to 7Mind, Gymondo & Buddyfit — our own digital wellbeing products🚲 €30 monthly mobility budget via Navit📚 €1,000 annual training budget + a wide range of opportunities for personal growth and development👨👩👧 Family-friendly benefits — childcare costs & paid sick days for children🍎 The office classics — fruit & vegetable basket, muesli & yogurt (also vegan), drinks & snacks🐶 Pet-friendly office — four-legged colleagues are very welcome!These benefits apply to full-time and part-time permanent employees. Working students and interns receive a pro-rated selection.People who make things happenGymondo is one of the leading digital fitness and nutrition platforms in the DACH region — with over 2,000 workouts, holistic training programmes and smart nutrition plans. As part of 7NXT Health Group, we help millions of people make movement a lasting part of their everyday lives.Our team pushes each other, thinks critically and grows together. We take responsibility — for our users, our products and our planet.Everyone countsWe welcome what makes you unique.At Gymondo we believe in diversity, openness and team spirit. No matter which gender you identify with, whether you have a disability, what your neurotype is, where you come from, what you believe in or how you love — you are welcome here.Don’t meet all the criteria? No problem — if you’d like to help shape the future of fitness & wellbeing with us, we look forward to your application.Need a more accessible process or have questions? Write to us — we’ll find a way.Find more English Speaking Jobs in Germany on Arbeitnow