ManagerAt Freeletics, we are not just a fitness company – we are a global movement redefining how people train their bodies and minds through technology and personalized coaching. Our mission is to empower individuals from all walks of life to become the strongest, most resilient versions of themselves, both physically and mentally. Whether someone is just beginning their fitness journey or already deep into a high-performance routine, our platform is built to meet users where they are and guide them to greater heights.
The world of fitness has long relied on one-size-fits-all programs, but Freeletics is breaking the mold by offering AI-driven, scientifically backed and fully personalized training plans that respond to user behavior and goals in real-time.
With a thriving community of over 56 million registered users across the globe, Freeletics is among the most downloaded and trusted fitness platforms in the digital space. Our approach blends advanced sports science, behavioral psychology and machine learning to deliver training experiences that are more than just effective – they’re transformative. Users aren’t simply working out; they’re building discipline, mental toughness and healthy habits that last a lifetime.
Each plan adapts dynamically based on performance, making every training session personalized, efficient and focused on long-term growth. Through our mobile app, people in over 160 countries have learned to embrace discomfort, stay consistent and celebrate every milestone along the way.
Behind this impact lies a powerful digital engine – a suite of backend services and infrastructure designed to handle millions of daily users, customized recommendations, streaming audio coaching and detailed performance tracking. To keep the system responsive, scalable and future-ready, we rely on innovative engineers and backend developers who are passionate about building high-performance digital solutions.
The Freeletics experience is deeply tied to technology and every touchpoint – from onboarding new users to delivering real-time workout adjustments – is fueled by robust backend architecture and intelligent data pipelines. We understand that digital transformation doesn’t just support our product – it is our product.
This is where you come in. As Freeletics continues to grow and reshape the landscape of fitness and wellness, we are looking to expand our team with individuals who share our passion for innovation, health and user empowerment. Specifically, we’re in search of a Senior Backend Developer who thrives on solving complex problems, scaling platforms and crafting seamless integrations that elevate the user experience. If you’re motivated by engineering challenges and want your code to impact millions of lives, this role offers a rare opportunity to combine technical excellence with meaningful purpose.
Joining Freeletics means becoming part of a fast-moving, user-first organization that operates at the cutting edge of both fitness and technology.
You won’t just be maintaining code – you’ll be shaping the foundation of a platform that motivates people to take ownership of their health every day. You’ll work with product teams, data scientists, mobile developers and marketers to align backend systems with user needs and company goals.
More importantly, you’ll be part of a culture that encourages experimentation, prioritizes impact and values your personal and professional growth. With us, your engineering skills won’t just build software – they’ll help change lives.
We’re Hiring: Senior Backend Developer (Remote or Hybrid)
We’re in search of a Senior Backend Engineer with a passion for architecting robust systems, solving deep technical challenges and pushing the limits of backend performance and innovation. In this role, you’ll help us build and scale systems that fuel a fitness revolution. You’ll be a vital contributor to our engineering team, collaborating across product, data and design to build a backend ecosystem that supports our vision for intelligent, personalized and impactful fitness.
Core Responsibilities
Architect and Scale World-Class Backend Systems
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Design and implement highly efficient backend services that support our AI-driven training programs for tens of millions of global users.
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Craft scalable and modular backend solutions that can grow with our community and product ecosystem.
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Play a critical role in evolving our microservices architecture, ensuring responsiveness, stability and speed.
Optimize Performance at Scale
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Dive deep into performance bottlenecks and system inefficiencies – analyze root causes, identify patterns and deploy fixes at the architecture level.
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Continuously implement caching strategies and refactor existing code to enhance speed and system reliability.
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Ensure uptime and stability by enhancing observability, implementing real-time monitoring and utilizing smart alert systems.
Develop APIs That Power Our Apps
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Build and refine RESTful APIs that seamlessly integrate with our mobile and web platforms.
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Drive consistency, security and maintainability in API design, ensuring long-term scalability and developer efficiency.
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Work with internal stakeholders to shape APIs that support product innovation and user delight.
Collaborate Across Teams
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Partner with teams including User Acquisition, CRM, Data Science, Product and Marketing to align backend architecture with business objectives.
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Translate business requirements into scalable tech solutions that enable growth and agility.
Code with Precision and Best Practices
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Write high-quality, maintainable and well-documented code in Ruby (on Rails) or a similar modern backend framework.
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Follow test-driven development and implement robust test coverage to ensure consistent quality across services.
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Conduct peer code reviews and uphold code integrity and performance standards.
Contribute to DevOps and Infrastructure
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Get hands-on with CI/CD pipelines, containerization (Docker) and orchestration tools like Kubernetes.
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Collaborate in managing AWS cloud infrastructure, using Infrastructure-as-Code tools to ensure consistency and reliability.
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Improve automation and deployment workflows to speed up release cycles and reduce manual interventions.
Mentor and Lead by Example
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Guide junior engineers through mentoring, pair programming and sharing architectural knowledge.
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Support team growth through technical documentation, presentations and open-source contributions.
What We’re Looking For: Your Background
Proven Backend Development Experience
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Demonstrated expertise in designing and building scalable, production-ready RESTful APIs for high-volume applications.
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Strong hands-on experience with Ruby on Rails or similar backend frameworks with a focus on clean architecture and modular design.
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Comfortable building and scaling backend platforms that process high volumes of data and traffic.
Knowledge of Event-Driven Systems
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Familiarity with event-driven architecture and messaging queues (like Kafka or RabbitMQ).
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Experience managing asynchronous tasks and decoupling systems for better performance.
Agile and Collaborative Engineering
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Excellent communicator who thrives in agile, cross-functional teams.
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Adaptable to changing priorities and willing to take ownership of full development cycles – from ideation to post-release.
Version Control and Testing
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Skilled in using GitHub for version control, pull requests and issue tracking.
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Strong advocate for unit and integration testing using tools like RSpec or other testing libraries.
Cloud and Infrastructure Experience
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Experience working with AWS and infrastructure-as-code tools like Terraform or AWS CloudFormation.
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Proficient in CI/CD pipelines and automated deployments.
Personal Traits
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Passionate about clean, efficient and secure code.
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Focused on continuous improvement, both personally and as part of the wider engineering team.
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Strong sense of ownership, accountability and curiosity for solving real-world problems.
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Supportive team player who shares knowledge openly and contributes to a culture of growth and learning.
Perks and Benefits: Why You’ll Love It Here
Competitive Compensation
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Attractive salary aligned with industry benchmarks and your experience.
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Pension and financial wellness programs tailored to secure your future.
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Regular compensation reviews to ensure you’re recognized for your contributions.
Flexible Working Lifestyle
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Work a 4-day work week and enjoy improved work-life balance without compromising productivity.
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Flexible hybrid model: combine remote and in-office work according to your preference.
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Choose your hours – whether you’re an early bird or a night owl, we trust you to manage your schedule.
Total Wellbeing Support
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Full Freeletics membership with access to all fitness content and training tools.
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Mental health support via partners and resources focused on emotional and psychological wellness.
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Bike leasing programs, public transport subsidies and eco-friendly commuting support.
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Language learning programs and cultural integration support for international team members.
Career Development & Learning
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Design your career path with the help of mentors and learning resources.
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Access to courses, certifications and internal upskilling sessions tailored to your goals.
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Opportunity to contribute to open-source, speak at events or lead innovation initiatives.
Inspiring Workspace
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Our brand-new office is more than just a workplace – it’s a fitness and wellness hub.
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Rooftop terrace with mountain views, stocked healthy kitchen, modern meeting spaces and on-site workout zones.
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Shower and laundry facilities for team members who train during work breaks.
Strong Community Vibe
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Regular team events, offsites, holiday parties and team-building hikes to build bonds.
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Open culture where ideas, feedback and experimentation are highly encouraged.
Tech That Works for You
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Choose from the latest MacBooks or other premium devices under our equipment program.
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Software and tools tailored to maximize your development experience and efficiency.
Paid Time Off and Holidays
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Generous leave policy with 27 vacation days plus 15 national holidays.
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Time to disconnect, travel, recharge and spend with loved ones.
Innovation Culture
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Participate in quarterly innovation sprints and hackathons – open to all departments.
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Test new features, prototypes and explore passion projects that might shape the future of Freeletics.
Relocation Support
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Moving countries? We offer financial and logistical assistance with visa processing, relocation agency coordination and housing help.
How to Join the Freeletics Movement
If this sounds like your kind of challenge and culture, we’d love to hear from you. Help us build the digital future of fitness, one line of code at a time.
For Agencies and Recruiters
Please note: Freeletics does not engage with third-party recruiters or headhunters unless explicitly specified in the job post. Any speculative applications will be considered the sole property of Freeletics and will not be subject to any third-party terms.
Inclusion Is in Our DNA
Freeletics is proud to be an equal opportunity employer. We are deeply committed to fostering an inclusive culture where everyone can thrive. No matter your background, identity, gender, ability or beliefs, we welcome you as part of our diverse family.
Our team is a vibrant mix of cultures, talents and perspectives. We believe our differences make us stronger, more creative and better equipped to serve a global community. We are proud to cultivate an environment where every voice is heard and everyone has room to grow.
Need accommodations during the application process? Let us know – whether it’s accessibility support or using your preferred pronouns, we’re here to ensure you feel safe, respected and supported.
Let’s shape the future of fitness together.
Manager