Back End Developer

Backend Developer (Kotlin/JVM) | AIMLEAP | Bangalore- 5 Days | 4–7 years

About the role We're looking for a backend developer to design and build scalable, secure services for mobile and web applications in connected-device products. You'll own APIs, data models and service integrations, working closely with mobile, QA and DevOps colleagues.

Responsibilities

• Design and build RESTful services in Kotlin, defined API-first with OpenAPI.
• Model data and write efficient queries in PostgreSQL.
• Implement caching and asynchronous processing using Redis and message queues.
• Integrate third-party APIs and external services in a clean, extensible way.
• Handle file and media uploads, including large payloads.
• Implement authentication and authorization (OAuth2/OIDC).
• Write automated tests and help maintain CI/CD pipelines.
• Containerize services and support deployments across environments.
• Add logging, metrics and tracing so services are easy to run and debug.

Must-have

• 4–7 years of backend development, with strong Kotlin or Java skills (willing to work in Kotlin).
• Experience with Spring Boot or Ktor.
• Kotlin coroutines and non-blocking I/O.
• PostgreSQL, including schema design, migrations (Flyway or Liquibase) and query tuning.
• Redis and a message broker such as RabbitMQ or Kafka.
• API design: versioning, pagination, idempotency and rate limiting.
• Resilient integrations: retries, timeouts and circuit breakers.
• Docker; working knowledge of Kubernetes/Helm.
• OAuth2/OpenID Connect and REST API security best practices.
• Proficiency with Git and CI/CD tooling such as GitHub Actions or GitLab CI.

Nice-to-have

• Backends for wearable, IoT or connected-device products.
• An identity provider such as Keycloak.
• S3-compatible object storage.
• Observability tools: OpenTelemetry, Prometheus, Grafana, Sentry.
• Integrating AI/LLM APIs.
• Cloud-agnostic or on-premise deployment experience.
• Experience with AI-assisted development tools.

In your application

• Links to services or projects you've built (GitHub or a short description).
• A short note on one scalability or integration problem you solved.

What we offer

• Greenfield product work with a modern stack.
• Ownership of service design and architecture decisions.