Job Summary: Develop and maintain APIs and microservices, design backend and database architecture, ensuring reliable operation of the anti-gambling addiction app. Key Highlights: 1. Design and maintain secure and scalable APIs. 2. Collaborate with mobile and desktop teams for efficient integration. 3. Monitor performance and perform optimizations. **Mid/Senior Backend Developer** **Mission** Design and maintain secure and scalable APIs and business logic, ensuring reliable operation of the anti-gambling addiction app. **Responsibilities** * Develop and maintain APIs and microservices. * Design backend and database architecture. * Implement authentication, authorization, and security for sensitive data. * Ensure automated testing and code review. * Collaborate with mobile and desktop teams for efficient integration. * Monitor performance and perform optimizations. **Requirements** * Go or Java (Go preferred for performance and concurrency). * Gin/Fiber (Go) or Spring Boot (Java). * REST and GraphQL. * Experience with SQL and NoSQL databases. * Integration with RESTful or GraphQL APIs. * Version control with Git. * Best practices in information security. * Authentication and Authorization: OAuth2\.0, OpenID Connect, JWT. * PostgreSQL/MySQL, MongoDB/Redis (NoSQL/cache). * Messaging and Event Streaming: RabbitMQ, Kafka, or Azure Service Bus. * AWS, Azure, or GCP. * Kubernetes, Docker. * Terraform/Bicep (Infrastructure as Code). * Observability: Prometheus, Grafana, ELK/EFK Stack, OpenTelemetry. * CI/CD: Azure DevOps, GitHub Actions, or GitLab CI. * Testing: Postman/Newman, Pact (contract testing), automated integration. **Preferred Qualifications** * Experience in health, wellness, or behavioral prevention applications. * Knowledge of positive gamification. * Experience with high-volume data systems and scalability.