Senior Java Developer

1. Design, develop, and maintain high-quality backend services using Java (Spring Boot) and Go.

2. Build and optimize scalable microservices architecture with robust service-to-service communication.

3. Manage and optimize relational databases (PostgreSQL/MySQL), implementing query optimization and spatial indexing (PostGIS).

4. Implement asynchronous messaging systems using Kafka, RabbitMQ, or MQTT for real-time event-driven processing.

5. Take full ownership of the feature lifecycle, from architectural design and coding to Docker containerization and CI/CD deployment.

6. Collaborate in a fast-paced startup environment to solve complex engineering problems and support high-traffic, real-time platform demands.

REQUIREMENTS:

1. Bachelor's degree (S1) from any major.

2. Minimum 3–5 years of solid experience in backend development

3. Fluent in English; Upper-Intermediate level is highly welcome to apply.

4. Preferably available to join immediately or within a short notice period.

5. Willing to work Monday–Friday (09:00–18:00) and Saturday half-day (09:00–13:00).

6. Strong proficiency in Spring Boot, Spring Data JPA, REST API, and Dependency Injection.

7. Familiarity with Goroutines & channels, standard library, idiomatic Go, and building production-grade services.

8. Proficiency in PostgreSQL/MySQL (query optimization, indexing). Deep understanding of RESTful design, JSON, versioning, and authentication (JWT/OAuth2).

9. Hands-on experience with Microservices and message brokers (Kafka/RabbitMQ/MQTT).

10. Solid grasp of Concurrency, Caching (Redis), Idempotency, Error Handling, Git, Docker, and CI/CD basics.

Highly Desirable (Big Plus):

1. Experience in Ride-Hailing, On-Demand, Logistics, or Fleet Management platforms.

2. Deep knowledge in PostGIS, OSRM, routing, geofencing, spatial indexing, and IoT integration (device telemetry, event-sourcing ledger).

3. Experience with gRPC, CQRS, Kubernetes, and Observability tools (Prometheus, Grafana, Tracing).

4. Experience handling high-traffic real-time systems and Payment Gateway/Wallet integration.

5. Experience in integrating LLM APIs (OpenAI, Anthropic Claude), building AI-powered features (demand prediction, ETA, dynamic pricing), Vector databases/RAG, AI Agents/workflows, or MLOps basics.

Soft Skills: High level of ownership, independent problem-solver, and thrives in a fast-paced environment.

PT Green City Traffic is a start up company which focuses in environmentally friendly transportation. As a new company, we strive to provide society with a better type of transportation. Our goals start from Indonesia and will spread all across South East Asia.

We believe we can be a leading company that gives people a beter transortation without damaging the environmet. In short, we provide people a better life but without a reason to worry about the future. Today, Indonesia is moving towards a new era and our company is going to be one of those that pushes Indonesia becoming a better country.

PT Green City Traffic is a start up company which focuses in environmentally friendly transportation. As a new company, we strive to provide society with a better type of transportation. Our goals start from Indonesia and will spread all across South East Asia.

We believe we can be a leading company that gives people a beter transortation without damaging the environmet. In short, we provide people a better life but without a reason to worry about the future. Today, Indonesia is moving towards a new era and our company is going to be one of those that pushes Indonesia becoming a better country.