(Senior) Backend Engineer (m/f/d) - Golang

You will help us to keep improving our projects and bring them to the next level, establish new services using modern approaches and following programming standards to fulfil the requirements of our multi-platform applications. Rebuild old concepts, translate them to well known programming-patterns, and transparent and maintainable business logic.

If you are passionate about building modern, reusable code and libraries for future use, and interested in helping the Gymondo community to get fit and happy, we want you to join our team!

• You will work with the state-of-the-art technologies and approaches
• You will always learn, share knowledge and grow together with the team
• You will be encouraged to discuss better solutions and approaches
• You will be involved in all stages of the development process
• You will develop data driven features
• You will be working on a scalable and automated infrastructure

• Golang, Kotlin, Node.js, Java 17
• Gin-Gonic, Ktor, NestJS, Spring Boot
• Elasticsearch, RDBMS (MySQL, PostgreSQL), NoSQL (Dynamo, Mongo, Redis)
• Terraform, Docker (stateless services), Kubernetes, Event-Driven Architecture, AWS

At 7NXT, we live up to our promise: We empower people to lead a fit and healthy life.

Gymondo & BuddyFit (digital fitness), 7Mind (mental health) and 7NXT Brand Solutions (publishing, retail, TV) help millions of people live healthier lives – physically and mentally.

We believe in trust rather than rigid structures. We give each other support and freedom to grow, learn from each other and ask questions that help us move forward. For us, working smart means working cleverly rather than endlessly.

And we never lose sight of what really matters: the people we do it all for. Their progress is what drives us. For us, responsibility doesn't end at the office door: sustainability, inclusion and diversity aren't buzzwords, they're part of our everyday life.

Your Story

• You have 4+ years of professional experience working with backend focused full-stack development (infrastructure as well)
• 3+ years of experience contributing to microservice architectures (reliability, scaling, and stateless applications) and considering design patterns and best practices (event driven systems, clean architecture, backend for frontend)
• 3+ years of experience in designing REST APIs following openspec standards
• Relevant experience in Golang and Gin-Gonic. Nice to haves are JVM languages (Kotlin / Java), JS/TS and frameworks like Ktor, Spring, Node.js
• Ability to design proof of concepts and prototypes
• Standardised coding practises including peer code reviews, unit testing, and a preference for agile development
• Open-minded and interested in state-of-the-art technologies and methodologies

• Embrace a Product Engineer mindset: Balancing technical excellence with business impact by proactively identifying trade-offs that prioritize user value and speed-to-market without compromising long-term system health.
• Ability to communicate openly and clearly with the whole Product & Engineering team and additional stakeholders
• You to promote good relationships in your guild and are always humble and willing to learn from others