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Open nowFirst seen 9 hours ago

Java Backend Engineer - FinTech

IO TECH SOLUTIONS LIMITED797 open roles

Where
Hong Kong, Hong Kong SAR, Hong Kong
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Your applicationOpen nowJava Backend Engineer - FinTechIO TECH SOLUTIONS LIMITED · Hong Kong, Hong Kong SAR, Hong Kong

  1. YouYes, apply to this one.

  2. CV RocketCV written for this posting.

  3. 25 readersRecruiter, hiring manager, skeptic. Round after round.

  4. CV RocketApplied on IO TECH SOLUTIONS LIMITED's own form.

The reply lands in your private mailbox

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The clock on this job

Early applications get read.

13.4% of postings close within 7 days. Measured by our own scanner across the market. IO TECH SOLUTIONS LIMITED postings stay open a median of 5 days.

Share of postings closed within
  1. 2.2%1 day
  2. 4.6%3 days
  3. 13.4%7 days
  4. 21.6%14 days
  5. 36.2%30 days
  6. 59.0%60 days
This job: first seen 9 hours ago

IO TECH SOLUTIONS LIMITED median: 5 days open

The posting

We are seeking a highly skilled Senior Java Backend Engineer with over 5 years of professional software development experience. In this role, you will design, build, and optimize scalable, high-performance distributed systems. The ideal candidate possesses deep expertise in Spring Boot for microservices architecture and Apache Kafka for high-throughput, event-driven data streaming. You will be responsible for creating robust enterprise APIs, optimizing complex data pipelines, and ensuring the reliability of critical backend services.

  • Design and develop low-latency, high-availability microservices using the Spring Boot framework.
  • Build, maintain, and optimize real-time data streaming pipelines and messaging architectures utilizing Apache Kafka.
  • Design clean, scalable, and secure RESTful APIs and handle service-to-service communication via gRPC or asynchronous messaging.
  • Implement data persistence and complex queries across relational databases (e.g., PostgreSQL, MySQL) and NoSQL stores (e.g., MongoDB), focusing heavily on performance tuning and indexing.
  • Integrate distributed caching solutions like Redis or Memcached to improve application responsiveness and scale.
  • Write high-quality, maintainable code following clean-code principles. Drive rigorous automated testing practices, including unit (JUnit, Mockito) and integration tests.
  • Containerize applications using Docker and collaborate on deployments within Kubernetes clusters managed via CI/CD pipelines.

Required Skills & Qualifications

  • Minimum 5 years of hands-on professional backend software development using Java (Java 11/17+).
  • Deep understanding of the Spring ecosystem (Spring Boot, Spring Data JPA, Spring Security, and Spring Cloud).
  • Proven track record of implementing event-driven architectures with Apache Kafka, including knowledge of Kafka Topics, Partitions, Consumer Groups, Schema Registry, and Kafka Streams.
  • Strong proficiency in Microservices patterns (Circuit Breakers via Resilience4j, CQRS, Event Sourcing, and API Gateways).
  • Strong knowledge of SQL/PostgreSQL database optimization and ORM frameworks like Hibernate.
  • Solid experience with cloud infrastructure (AWS, GCP, or Azure), Docker containers, and CI/CD tools (Jenkins, GitHub Actions).
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