Backend Java Developer (Kafka)

IO Tech Solutions Limited; Hong Kong; On-site; HKD 550,000 - 850,000; Full time

Job summary

IO Tech Solutions Limited is seeking a Backend Engineer to design, build, and maintain secure, scalable backend services. You will work with cross-functional teams to deliver digital products using lean and agile methods, and contribute to robust architectures powering new experiences.

The role emphasizes microservices, REST, Java 17+, Spring Boot and Cloud, Docker and Kubernetes, and a strong test-driven development approach.

Qualifications

• Bachelor's degree in a technical field or equivalent experience.
• 5+ years building microservices and REST-based systems.
• Experience with product-focused, Agile delivery and DevOps in cloud.
• Proficiency with Java 17+ and Spring technologies.

Responsibilities

• Collaborate with cross-functional teams to design, implement, and deploy new backend systems and enhancements to existing services.
• Engineer and maintain microservices and backend APIs to support new product functionality.
• Deliver backend features that enable new experiences and integrations.
• Maintain production systems, investigate incidents, and perform root cause analysis to prevent recurrence.
• Actively participate in Scrum ceremonies and contribute to sprint planning, execution, and review.
• Ensure strong test coverage through unit and integration testing.
• Participate in peer design discussions and code reviews.
• Contribute to architecture planning and technical design sessions.
• Proactively collaborate with teammates, including distributed/remote stakeholders, and communicate effectively.

Skills

Java 17+

Spring Boot

Spring Cloud

REST APIs

Microservices

Agile

DevOps

Cloud

Unit testing

TDD

OOP design

Education

Bachelor's degree in a technical field

Tools

Docker

Kubernetes

MySQL

Amazon RDS

Job description

As a Backend Engineer, you will design, build, and maintain secure, reliable, and scalable software. You'll apply lean and agile principles to solve challenging problems, continuously improve our platforms, and contribute to successful delivery of our digital products. You'll play a key role in developing backend services that power new experiences and technologies.

Position Summary

As a Backend Engineer, you will design, build, and maintain secure, reliable, and scalable software. You'll apply lean and agile principles to solve challenging problems, continuously improve our platforms, and contribute to successful delivery of our digital products. You'll play a key role in developing backend services that power new experiences and technologies.

Primary Responsibilities

• Collaborate with cross-functional teams to invent, design, implement, and deploy new backend systems and enhancements to existing services.
• Engineer and maintain microservices and backend APIs to support new product functionality.
• Deliver backend features that enable new experiences and integrations.
• Maintain production systems, investigate incidents, and perform root cause analysis to prevent recurrence.
• Actively participate in Scrum ceremonies and contribute to sprint planning, execution, and review.
• Ensure strong test coverage through unit and integration testing.
• Participate in peer design discussions and code reviews.
• Contribute to architecture planning and technical design sessions.
• Proactively collaborate with teammates, including distributed/remote stakeholders, and communicate effectively.

Requirements

• Bachelor's degree in a technical field (or equivalent work experience and training).
• Minimum of 5 years experience building microservices and web-based systems (REST).
• Experience in a product-oriented, team-based environment using modern delivery practices (e.g., UX/product thinking, lean, Agile, DevOps, cloud).
• Proficiency in Java 17+ (preferred JDK25).
• Proficiency with Spring Boot and Spring Cloud.
• Experience with Amazon RDS (MySQL).
• Understanding of Docker and Kubernetes.
• Ability to write unit tests and follow TDD practices.
• Strong understanding of design patterns, OOP, and software development methodologies.