Back End Developer

About Cult - Curefit Healthcare Pvt Ltd, founded in 2016, is India's largest fitness company and wellness platform. Cult, from the house of Curefit, was established with a mission to make fitness easy, fun and accessible to everyone, and has emerged as a community celebrating the joy of fitness. The brand today offers a range of fitness services ranging from group workouts, gyms and personalized fitness solutions, as well as an expansive selection of quality fitness products for the everyday athlete. The company's vision is to empower everyone towards an active and healthier lifestyle through innovative fitness solutions, enabled by technology.

About the Role: We're building India's largest fitness platform — powering group workouts, gym sessions, and habit-building experiences for millions across India. The Member Experience team owns the features that keep members coming back, from live class infrastructure to retention loops like Cult Ninja. We're looking for a Senior Backend Engineer who's 4+ years in, has shipped real features at a product company, and is genuinely excited about how AI tools are changing the way engineers work and deliver

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What you'll Build:

• Build features that integrate smoothly with internal tools and customer-facing services, while continuously enhancing product value.

• APIs and microservices powering group workouts, gym sessions, and member retention at scale. • Perform performance tuning to ensure high reliability and responsiveness of all systems.

• AI-assisted workflows and agent-based tooling that multiply team output.

• Integrations across member data, scheduling, and engagement systems

What we're looking for:

The Fundamentals

• 3+ years of backend experience at a product-based company

• Proficient in Node.js / TypeScript or Java / Spring Boot — deep ownership of one, working familiarity with the other is a plus

• Solid REST API design — versioning, idempotency, error contracts, auth

• Comfortable with SQL + one NoSQL store (Redis, MongoDB)

• Can reason about latency, retries, and failure modes — not just happy paths

• Curious about AI tools and how they can meaningfully speed up delivery — understands where agents add real leverage and where they break

Ownership Mindset:

• Own the complete feature lifecycle—from product and tech design through development, experimental rollout, and iterations.

• Proactively flags risks, doesn't wait to be asked

• Writes code like someone else will maintain it during a 2 AM incident

What to expect here:

• Features you ship will touch millions of active members across India

• Surround yourself with sharp, opinionated engineers who push each other

• Real ownership — your name goes on the feature, the metrics, and the learnings

• A team that takes code quality seriously without being dogmatic