Kotlin Back-End Developer
Our Client is a fast-growing HealthTech company building the Arab world's first unified health-data platform — one Arabic-first dashboard that brings together users' sleep, nutrition, activity and heart data from 15+ smart devices, powered by an AI health assistant.
We're looking for a hands-on Back-End Developer to work part-time and fully remote on the core services that ingest, process and serve millions of health-data points. You'll own backend features end-to-end in a modern Kotlin + Spring Boot stack, working closely with the mobile team on clean, well-documented APIs.
We're looking for a hands-on Back-End Developer to work part-time and fully remote on the core services that ingest, process and serve millions of health-data points. You'll own backend features end-to-end in a modern Kotlin + Spring Boot stack, working closely with the mobile team on clean, well-documented APIs.
Key Responsibilities:
- Design, build and maintain backend services in Kotlin 2.x and Spring Boot 3.x
- Model and optimize data across PostgreSQL 17 (transactional) and ClickHouse (analytics/OLAP)
- Build and document clean, versioned REST APIs consumed by the iOS and Android apps
- Integrate and normalize data from third-party wearable/device APIs
- Design efficient data flows between the transactional store and the analytics layer
- Ensure security, encryption and privacy standards for sensitive health data
- Write tests, participate in code reviews, and keep technical documentation current
Requirements
- Proven experience shipping production backend systems in Kotlin
- Strong hands-on Spring Boot 3.x experience
- Solid PostgreSQL skills (schema design, indexing, query optimization)
- Working experience with ClickHouse or a comparable OLAP/columnar store
- Comfortable designing REST APIs and working with JSON at scale
- Self-directed and reliable in a remote, part-time setup
- Good written English; Arabic is a plus
Skills:
- Kotlin · Spring Boot · REST API design · PostgreSQL · ClickHouse
- Coroutines/concurrency · Gradle · Docker · CI/CD · Git
- Data modeling · performance tuning · secure data handling
Benefits
- 100% remote, flexible part-time hours
- Modern greenfield stack with real ownership
- High-impact product in a fast-scaling regional HealthTech