Job
- Level
- Senior
- Location
- Berlin
- Working Model
- Hybrid, Onsite
- Job Field
- Back End
- Employment Type
- Full Time
- Contract Type
- Permanent employment
Job Summary
In this role, you will develop scalable backend systems using Golang and Gin-Gonic, design REST APIs following OpenAPI standards, and work on a reliable microservice architecture for data-driven features.
Job Technologies
Your role in the team
- As (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.
- You build, improve and maintain scalable backend services using Golang and Gin-Gonic, following clean architecture and established design patterns.
- You design and implement REST APIs following OpenAPI standards, with a focus on clarity, reliability and long-term maintainability.
- You contribute to our microservice architecture - working on reliability, scaling, stateless applications and event-driven systems.
- You rebuild legacy concepts and translate them into well-known programming patterns with transparent and maintainable business logic.
- You develop data-driven features and are involved in all stages of the development process - from design to deployment.
- You work on our scalable, automated infrastructure using AWS, Kubernetes and Terraform.
- You participate in peer code reviews, write unit tests and champion agile development practices.
- You share knowledge, discuss better solutions openly and grow together with the team.
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Our expectations of you
Qualifications
- Ability to design proof of concepts and prototypes.
- Standardised coding practices: peer code reviews, unit testing and a preference for agile development.
- An open mindset and genuine interest in state-of-the-art technologies and methodologies.
- Fluent English.
- A 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 health.
- Starke Kommunikationsfähigkeiten im gesamten Produkt- und Engineering-Team sowie bei weiteren Stakeholdern.
- A collaborative, humble approach - you promote good relationships in your guild and are always willing to learn from others.
Experience
- 4+ Jahre Berufserfahrung in backend-orientierter Entwicklung, einschließlich Infrastruktur.
- 3+ years contributing to microservice architectures with a focus on reliability, scaling, stateless applications, event-driven systems and clean architecture.
- 3+ years designing REST APIs following OpenAPI standards.
- Proven hands-on experience with Golang and Gin-Gonic.
- Experience with JVM languages (Kotlin / Java) and frameworks such as Ktor, Spring or Node.js.
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What we offer
- 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!
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Topics You Will Work On
Job Locations
About Your Employer
7NXT Health GmbH
7NXT currently runs a portfolio of three companies focussing on the fitness & wellbeing market. Our vision is to help millions of people to switch into healthier lifestyles.
Description
- Company Type
- Established Company
- Working Model
- Hybrid, Onsite
- Industry
- Healthcare, Social Sector, Other Sectors
Senior Backend Engineer
- Location
- Berlin
- Working Model
- Hybrid, Onsite
- Diversity
- Open for all genders
