Gymflow

🚀About Gymflow

Gymflow is a founder-led, bootstrapped SaaS platform built for modern gym and fitness studio owners. We help automate everything from bookings and payments to member communication and access control. We’re on a mission to make fitness businesses run smoother and grow faster.

We’re a fully remote company with 10 high-performing team members spread all over Europe. We’re looking for someone to join our passion for building outstanding products and helping small business owners.

⭐Why work for Gymflow?

• Annual bonus linked to company performance
• Share options plans for long term loyalty
• Annual salary reviews
• High-performing team with quick delivery, see your code in production fast.
• 30 days paid vacation per year

💼 The Role & Responsibilities

You’ll work closely with frontend engineers, product managers, and our technical lead to ensure a robust, secure, and high-performance system for our customers. You’ll be joining a small, focused team where your impact is immediate—your work will directly affect production systems used by over 200,000 users globally.

Responsibilities include:

• Designing, building, and maintaining APIs and microservices in Java (Spring Boot)
• Managing databases (PostgreSQL, RDS), including schema design and query optimization
• Monitoring production systems and resolving performance or reliability issues
• Developing and optimizing integrations with third-party systems (e.g. Stripe, Kisi, Keycloak, Zapier, Xero)
• Ensuring application performance, scalability, and reliability across our backend services
• Writing clean, well-tested, and maintainable code following best practices
• Contributing to DevOps workflows including CI/CD pipelines, Docker, and Kubernetes (EKS)
• Conducting code reviews, pair programming, and mentoring other engineers
• Collaborating with frontend developers to design efficient and well-structured APIs

🧠 You’re a Fit If You Have...

• 3+ years of professional backend development experience
• Strong proficiency in Java and Spring Boot
• Experience designing and consuming REST APIs
• Solid knowledge of PostgreSQL (schemas, migrations, performance tuning)
• Experience working with Docker and containerized deployments
• A strong focus on code quality, testing, and system reliability
• A collaborative, self-driven mindset and ability to own backend features end-to-end

⭐ Nice-to-Haves

• Understanding of authentication/authorization flows (OAuth2, JWT)
• Familiarity with AWS services (RDS, S3, EKS)
• Experience with Stripe Connect or other payment platforms
• Familiarity with Stripe, Kisi, Zapier or Xero APIs
• Exposure to event-driven or microservices architectures
• Experience with scaling SaaS platforms in production environments
• Contributions to open-source Java/Spring projects

🗒️ Application Process

1. You will be invited to a quick 10-minute screening call initially
2. If your application is successful, you’ll be invited to attend a 30-minute call with our founder.
3. Finally you will be invited for a final technical interview with our technical lead, where you will participate in a live coding exercise.

We respond fast. Expect an intro call, a short exercise, and a final interview—all within two weeks if it’s a match.

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