Senior Java Developer

PERSOL Singapore Pte Ltd; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

PERSOL Singapore seeks an experienced Java engineer to design, build, and maintain scalable Spring-based applications in a cloud environment. You will collaborate across teams to deliver robust APIs, microservices, and automated tests, ensuring performance and reliability at scale.

Applicants should have deep expertise in Spring, REST, and modern DevOps practices, with a track record of delivering SaaS/PaaS solutions in cloud ecosystems.

Qualifications

• Minimum 6 years of strong experience building apps, preferably Java Spring stack.
• Experience with cloud-based SaaS/PaaS products.
• Solid understanding of design patterns, algorithms and data structures.
• Ability to articulate a solution and its benefits/shortcomings with alternatives.
• Flexibility to transition between programming languages and tool sets.

Responsibilities

• Create solutions which delight customers, abstracting complexity.
• Design, build, and maintain efficient, reusable, and reliable code.
• Ensure the best possible performance, quality, and responsiveness of the applications.
• Identify bottlenecks and bugs, and devise solutions to these problems.
• Ensure excellent code quality, and automation.
• Solve high severity production issues on priority.

Skills

Spring Boot

Spring MVC

Spring Data

RESTful APIs

SQL databases

NoSQL (MongoDB/Redis)

Maven

Gradle

Git

CI/CD

Java concurrency

Docker

Kubernetes

Kafka

RabbitMQ

Cloud (AWS/Azure/GCP)

Tools

Maven

Gradle

Docker

Kubernetes

JUnit

Mockito

Git

CI/CD tools

Kafka

RabbitMQ

Job description

Responsibilities

• Create solutions which delight customers, abstracting complexity
• Design, build, and maintain efficient, reusable, and reliable code
• Ensure the best possible performance, quality, and responsiveness of the applications
• Identify bottlenecks and bugs, and devise solutions to these problems
• Ensure excellent code quality, and automation.
• Solve high severity production issues on priority

Skills

• Solid experience with Spring Boot, Spring MVC, Spring Data, and dependency injection.
• Experience designing and consuming RESTful APIs.
• Knowledge of SQL and relational databases (MySQL, PostgreSQL, Oracle, etc.).
• Familiarity with NoSQL stores (MongoDB, Redis) is a plus.
• Experience with build tools such as Maven or Gradle.
• Understanding of microservices architecture and distributed systems.
• Familiarity with logging, monitoring, and profiling tools.
• Working knowledge of Git and CI/CD pipelines.
• Knowledge of concurrency patterns in Java
• Experience with databases, cache and messaging.
• Experience with Spring Security or OAuth2.
• Exposure to Kafka, RabbitMQ, or other messaging systems.
• Cloud experience (AWS, Azure, GCP).
• Docker, Kubernetes, and container orchestration basics.
• Test automation using JUnit, Mockito, or similar frameworks.
• Knowledge of API gateways and service mesh architectures.
• Understanding fundamental design principles behind a scalable application
• Basic understanding of the class loading mechanism in Java
• Creating database schemas that represent and support business processes
• Implementing automated testing platforms and unit tests
• Proficient understanding of code versioning tools, such as Git
• Familiarity with build tools such as Github, Maven and Gradle
• Familiarity with continuous integration
• API-first development, CI/CD automation, and DevSecOps

What you have

• At least 6 years of Strong experience in building apps, preferably on Java - Spring stack
• Experience working on cloud-based SaaS/PaaS products
• Understanding of design patterns, algorithms and data structures
• Articulation of a solution and its benefits / shortcoming with alternatives
• Ability to transition between programming languages and tool sets