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

Your Mission

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

Our Tech Stack

• 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

About us

Gymondo is one of the leading digital platforms for fitness and nutrition in German-speaking countries, offering over 2,000 workouts, holistic training programmes and smart nutrition plans. As part of the 7NXT Health Group , we pursue a clear mission together with 7Mind and 7NXT Brand Solutions: We empower people to lead a fit and healthy life.
We believe that exercise is more than just sport – it is a path to self-confidence, mental strength and the joy of life.
We employ people who push each other, think for themselves, question things and want to grow together. As a team and as individuals, we grow with every challenge. We take responsibility not only for our products, but also for our environment: for people, the planet and each other.

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

Our Benefits - Just for You

Success 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
• 2 additional days off: December 24 (Christmas Eve) and December 31 (New Year's Eve) are officially recognized as paid holidays.
• Hybrid working model (3 days in the office, 2 days working from home)
• 4 weeks of work from abroad per year
• A free Urban Sports Club M membership & access to Nilo Health for mental health and personal development
• Free access to our digital wellbeing products (7Mind & Gymondo)
• Monthly mobility budget of €30 via Navit
• Family-friendly benefits : childcare costs & sick days for children
• The office classics : fruit & vegetable basket, muesli & yogurt (also vegan), drinks & snacks
• A wide range of opportunities for personal growth and development - including a €1,000 annual training budget
• Four-legged colleagues are welcome in our pet-friendly office!

Come as you are

We welcome what makes you unique.
At 7NXT, Gymondo and 7Mind, 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 would like to shape the future of health & well-being with us, we look forward to receiving your application. Do you need a more accessible application process or do you have questions about the procedure? Write to us and we'll find a way.