Java Backend Developer

ESPIRE INFOLABS (SINGAPORE) PTE. LTD.; Singapore; On-site; SGD 120,000 - 150,000; Full time

Job summary

ESPIRE INFOLABS (SINGAPORE) PTE. LTD. is seeking an experienced Java Backend Developer to design, develop, and maintain scalable backend services, APIs, and microservices in a cloud-native AWS environment.

You will contribute to production support, debugging, and continuous improvement of existing services, collaborating with architects, DevOps, QA, and business teams across the SDLC to deliver robust backend solutions.

Qualifications

• 7+ years of Java backend development experience.
• Strong hands-on experience with Java 17+ & Spring Boot 3.x.
• Strong experience in Microservices, REST/GraphQL APIs.
• Hands-on AWS: ECS, EC2, RDS.
• Experience with CI/CD: GitLab, AWS CodeCommit, CodePipeline.
• Experience with IaC and cloud deployment.
• Strong SQL/Oracle and relational database knowledge.
• Experience with Okta authentication/authorization.
• Experience with MuleSoft/API integration.
• Knowledge of Docker/Kubernetes is an advantage.
• Understanding of cloud security, monitoring, performance, and scalable application design.

Responsibilities

• Design and develop Java-based microservices and REST/GraphQL APIs using Java 17+ and Spring Boot 3.x.
• Build scalable, secure, and high-performance backend solutions.
• Develop integrations with MuleSoft, Okta, and enterprise systems.
• Deploy and manage applications on AWS (ECS, EC2, RDS).
• Develop and maintain CI/CD pipelines using GitLab and AWS CodePipeline/CodeCommit.
• Work with SQL/Oracle databases and optimize queries and application performance.
• Monitor and troubleshoot applications using Grafana and AWS CloudWatch.
• Participate in production support, incident resolution, RCA, and continuous improvement.
• Collaborate with architects, DevOps, QA, and business teams throughout the SDLC.

Skills

Java backend development

Java 17+

Spring Boot 3.x

Microservices

REST/GraphQL APIs

AWS

CI/CD

SQL/Oracle

Okta authentication

MuleSoft/API integration

Docker/Kubernetes

Tools

GitLab

AWS CodePipeline

CodeCommit

Grafana

CloudWatch

Docker

Kubernetes

Job description

Job Title: Java Backend Developer (API & Microservices, AWS Cloud)

Role Overview

We are looking for an experienced Java Backend Developer to design, develop, and maintain scalable backend services, APIs, and microservices within a cloud-native AWS environment.

The role will be responsible for developing robust and high-performing backend solutions, integrating with enterprise platforms and third‑party systems, and continuously improving the reliability, scalability, security, and performance of backend applications. The developer will also contribute to production support, troubleshooting, and continuous improvement of existing services.

Key Responsibilities

• Design and develop Java-based microservices and REST/GraphQL APIs using Java 17+ and Spring Boot 3.x.
• Build scalable, secure, and high-performance backend solutions.
• Develop integrations with MuleSoft, Okta, and enterprise systems.
• Deploy and manage applications on AWS (ECS, EC2, RDS).
• Develop and maintain CI/CD pipelines using GitLab and AWS CodePipeline/CodeCommit.
• Work with SQL/Oracle databases and optimize queries and application performance.
• Monitor and troubleshoot applications using Grafana and AWS CloudWatch.
• Participate in production support, incident resolution, RCA, and continuous improvement.
• Collaborate with architects, DevOps, QA, and business teams throughout the SDLC.

Required Skills & Experience

• 7+ years of Java backend development experience.
• Strong hands‑on experience with Java 17+ & Spring Boot 3.x.
• Strong experience in Microservices, REST/GraphQL APIs.
• Hands‑on AWS: ECS, EC2, RDS.
• Experience with CI/CD: GitLab, AWS CodeCommit, CodePipeline.
• Experience with IaC and cloud deployment.
• Strong SQL/Oracle and relational database knowledge.
• Experience with Okta authentication/authorization.
• Experience with MuleSoft/API integration.
• Knowledge of Docker/Kubernetes is an advantage.
• Understanding of cloud security, monitoring, performance, and scalable application design.

Good to Have

• Experience with containerization and orchestration (Docker, Kubernetes)
• Exposure to security best practices in cloud environments
• Familiarity with Agile/Scrum methodologies

Soft Skills

• Strong problem‑solving and analytical skills
• Ability to work in a fast‑paced environment
• Excellent communication and stakeholder management skills
• Proactive mindset with ownership of production systems