Java Developer (Spring Boot, Microservices, Apache Kafka, RabbitMQ, Kubernetes, Temporal, OAuth, Redis, Grafana, ELK Stack)

EVYONIC SOLUTIONS PTE. LTD.; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

EVYONIC SOLUTIONS PTE. LTD. in Singapore seeks an experienced Senior Java Developer to design, build, and maintain scalable enterprise Java applications using Spring Boot and microservices.

You will implement secure RESTful services with OAuth/JWT, design robust database schemas in Oracle and MySQL, and orchestrate asynchronous processing with Kafka and RabbitMQ, while deploying containers with Docker/Kubernetes and automating CI/CD pipelines with Jenkins and GitLab CI/CD.

Qualifications

• 7+ years of professional experience in Java application development.
• Hands-on Java, Spring Boot and microservices experience.
• Secure RESTful APIs using Spring Security, OAuth, and JWT.
• Event streaming with Kafka/RabbitMQ.
• Docker/Kubernetes and CI/CD automation.
• Experience with Oracle and MySQL databases.
• Redis caching and performance optimization.
• Temporal workflow orchestration.
• ELK stack for monitoring and troubleshooting.
• Unit/Integration testing with JUnit/Mockito.

Responsibilities

• Design, develop, and maintain scalable Java applications using Java and Spring Boot.
• Develop and maintain microservices-based applications using RESTful APIs and event-driven architecture.
• Implement secure authentication and authorization using OAuth, JWT, and Spring Security.
• Design and optimize database schemas, complex SQL queries, and stored procedures using Oracle and MySQL.
• Implement asynchronous processing and event streaming using Apache Kafka and RabbitMQ.
• Develop and deploy containerized applications using Docker and Kubernetes.
• Build and maintain CI/CD pipelines using Jenkins and GitLab CI/CD.
• Implement distributed caching using Redis and optimize application performance.
• Develop reliable background workflows and distributed task orchestration using Temporal.
• Implement monitoring, logging, and troubleshooting using Elasticsearch, Logstash, Kibana (ELK), and Grafana.
• Write unit and integration tests using JUnit and Mockito.
• Apply SOLID principles, design patterns, and Domain-Driven Design (DDD) in application development.
• Conduct code reviews, troubleshoot production issues, and collaborate with cross-functional teams to deliver reliable software.

Skills

Java

Spring Boot

Microservices

RESTful APIs

OAuth & JWT

Spring Security

Oracle & MySQL

Kafka

RabbitMQ

Docker

Kubernetes

Jenkins

GitLab CI/CD

Redis

Temporal

Elasticsearch

Logstash

Kibana

JUnit & Mockito

DDD & SOLID

Tools

Kafka

RabbitMQ

Job description

Responsibilities

• Design, develop, and maintain scalable, high-performance Java applications using Java and Spring Boot.
• Develop and maintain microservices-based applications using RESTful APIs and event-driven architecture.
• Implement secure authentication and authorization using OAuth , JWT, and Spring Security.
• Design and optimize database schemas, complex SQL queries, and stored procedures using Oracle and MySQL.
• Implement asynchronous processing and event streaming using Apache Kafka and RabbitMQ.
• Develop and deploy containerized applications using Docker and Kubernetes.
• Build and maintain CI/CD pipelines using Jenkins and GitLab CI/CD.
• Implement distributed caching using Redis and optimize application performance.
• Develop reliable background workflows and distributed task orchestration using Temporal.
• Implement monitoring, logging, and troubleshooting using Elasticsearch, Logstash, Kibana (ELK), and Grafana.
• Write unit and integration tests using JUnit and Mockito, ensuring code quality and reliability.
• Apply SOLID principles, design patterns, and Domain-Driven Design (DDD) in application development.
• Conduct code reviews, troubleshoot production issues, and collaborate with cross-functional teams to deliver reliable software.

Requirements

• 7+ years of professional experience in Java application development, including experience developing and maintaining production-grade applications.
• Strong hands-on experience with Java , Spring Boot, and microservices architecture.
• Proven experience designing and developing secure RESTful APIs using Spring Security, OAuth, and JWT.
• Strong experience with Apache Kafka and RabbitMQ for event streaming and asynchronous messaging.
• Hands-on experience with Docker, Kubernetes, and CI/CD pipeline automation using Jenkins or GitLab CI/CD.
• Experience in database including Oracle, MySQL, complex SQL queries, query optimization, and stored procedures.
• Practical experience implementing Redis caching and optimizing distributed application performance.
• Experience with Temporal or similar workflow orchestration platforms.
• Hands-on experience with Elasticsearch, Logstash, Kibana, and Grafana for application monitoring and troubleshooting.
• Experience in unit and integration testing using JUnit and Mockito.
• Experience in SOLID principles, design patterns, Domain-Driven Design, and distributed systems.
• Excellent problem-solving, debugging, communication, and teamwork skills.