Senior Backend Engineer - Java Spring

About Enhance

At Enhance, we’re revolutionizing the fitness industry by combining cutting-edge technology with personalized training solutions. As the leading provider of certified personal trainers in the GCC, we offer flexible, one-on-one sessions that fit seamlessly into any lifestyle—whether at home, in the gym, or outdoors—through our innovative Enhance Fitness app.

Beyond personal training, our tech division, Enhance Tech, has developed a powerful PT management platform designed to streamline operations and optimize trainer performance. Built from firsthand industry experience and trusted by over 500 trainers, our SaaS solution equips fitness businesses and gyms with data-driven tools to scale their personal training services effortlessly.

If you're passionate about fitness, technology, and making an impact, Enhance offers the opportunity to be part of a dynamic team that’s shaping the future of the industry.

The Role

We’re looking for a hands-on Senior Backend Engineer to help build and improve the core platform behind our trainer workflows, customer integrations, and operational data flows.

This role is for someone who can own backend work end-to-end: clarify requirements, design the approach, implement, test, hand over cleanly to QA, and support release to production.

What You’ll Work On

• Build and improve backend services using Java and Spring Boot.
• Own backend features from design through production.
• Work on integrations with gym management systems, including clients, packages, subscriptions, sessions, and related data.
• Help make customer integrations more repeatable, configurable, observable, and reliable.
• Improve release confidence through better engineering validation, automated tests, and clearer QA handoff.
• Work closely with Product, QA, Mobile, Data, and Infra.
• Help evolve functionality from legacy systems into the core platform.
• Contribute to design discussions, RFCs/ADRs, code reviews, and technical planning.
• Mentor other engineers through strong examples and thoughtful reviews.

What We’re Looking For

• Ideally 7+ years of backend engineering experience.
• Strong Java / Spring Boot experience, or strong JVM/backend experience with ability to ramp quickly.
• Experience building and operating production backend systems.
• Strong understanding of relational databases, APIs, distributed systems, and service boundaries.
• Practical testing experience: unit, integration, contract, API, or end-to-end tests.
• Good judgment around external integrations, retries, idempotency, data correctness, and observability.
• Ability to improve existing systems incrementally without defaulting to rewrites.
• Clear communication with Product and QA around scope, risks, timelines, and release readiness.
• Comfortable working in a growing company where not everything is perfectly structured yet.

Useful Experience

Java 17+, Spring Boot, Spring Security, Spring Data JPA, PostgreSQL, REST APIs, Docker, Kubernetes, CI/CD, AWS, Kafka, OAuth2/JWT, feature flags, observability tools such as Datadog/Prometheus/Grafana, third-party integrations, multi-tenant or configurable SaaS platforms, DDD, RFCs, or ADRs.

Why Join

• Real product, real customers, and a domain connected to gyms, trainers, and clients.
• Small engineering team with high ownership and visible impact.
• Interesting backend problems around integrations, customer-specific behavior, data quality, mobile/backend coordination, and release confidence.
• Opportunity to help shape the engineering culture as the company scales.