Senior Java Backend Engineer - Real-Time Microservices & Kafka

IO TECH SOLUTIONS LIMITED; Hong Kong; On-site; HKD 900,000 - 1,400,000; Full time

Job summary

IO TECH SOLUTIONS LIMITED is seeking a Senior Java Backend Engineer with 5+ years of experience to design, build, and optimize scalable backend systems in Hong Kong. You will focus on microservices using Spring Boot and high-throughput data streaming with Apache Kafka, creating robust APIs and ensuring system reliability.

Responsibilities include implementing data persistence across PostgreSQL/MySQL and MongoDB, integrating Redis caching, and delivering well-tested code within CI/CD pipelines

Qualifications

• 5+ years of backend Java development in enterprise environments.
• Deep Spring ecosystem knowledge (Boot, Data JPA, Security, Cloud).
• Experience building event-driven architectures with Kafka.
• Strong SQL and ORM performance tuning.

Responsibilities

• Design and build low-latency microservices with Spring Boot.
• Develop real-time data pipelines using Apache Kafka.
• Create secure RESTful APIs and service communication (gRPC).
• Optimize data persistence across relational and NoSQL stores.
• Implement caching with Redis/Memcached and ensure test coverage.

Skills

Java 11/17+

Spring Boot

Kafka

REST APIs

gRPC

SQL & ORM

MongoDB

Docker

Kubernetes

CI/CD

JUnit/Mockito

Tools

PostgreSQL

MySQL

MongoDB

Redis

Memcached

Apache Kafka

Docker

Kubernetes

Jenkins

GitHub Actions

Job description

IO TECH SOLUTIONS LIMITED is seeking a Senior Java Backend Engineer with 5+ years of experience to design, build, and optimize scalable backend systems in Hong Kong. You will focus on microservices using Spring Boot and high-throughput data streaming with Apache Kafka, creating robust APIs and ensuring system reliability.

Responsibilities include implementing data persistence across PostgreSQL/MySQL and MongoDB, integrating Redis caching, and delivering well-tested code within CI/CD pipelines