EXASOFT CONSULTING PTE. LTD.
Java Developer(Spring Boot, Spring WebFlux, WireMock, BPM, Workflow Automation, Kubernetes, DynamoDB, RAGAS)
Senior backend Java developer (8+ yrs) leading design and delivery of scalable microservices using Spring Boot, Spring WebFlux, and REST APIs, with BPM/workflow automation, SQL/NoSQL data (PostgreSQL, DynamoDB), and AWS/Docker/Kubernetes deployment, plus AI-enabled features via RAG, pgvector, Langfuse, and RAGAS.
- Compensation
- Not disclosed
- Location
- Singapore, Singapore
- Work setup
- Not specified
- Seniority
- Not specified
- Employment
- Contract
- Experience
- 8+ years
- Category
- Software engineering
- Posted
Skills
Must have
- Minimum 8+ years of experience in software development, backend architecture, and enterprise application integration
- Strong experience in Java, Spring Boot, and backend application development
- Hands-on experience with Spring WebFlux and reactive programming
- Experience in RESTful APIs, microservices architecture, and distributed systems
- Experience with BPM solutions and business workflow automation
- Experience with WireMock or similar tools for API contract testing
- Experience with relational databases such as PostgreSQL, MySQL, or Oracle DB, along with NoSQL databases such as DynamoDB
- Experience in automated testing, including unit and integration testing
- Experience in AWS cloud services, Docker, Kubernetes, and CI/CD pipelines
- Experience in API security, authentication, and authorisation mechanisms
- Experience with React, Next.js, JavaScript, HTML, and CSS for full-stack application development
- Experience in pgvector, RAG pipelines, Langfuse, and RAGAS for AI-integrated applications
- Strong analytical, problem-solving, communication, and technical leadership skills
- Ability to guide development teams, review code, and coordinate technical delivery
Nice to have
- Experience in Python and backend frameworks such as FastAPI
Full description
Responsibilities
- Lead the development and maintenance of scalable backend applications using Java and Spring Boot.
- Design and implement reactive services using Spring WebFlux to support efficient, asynchronous request processing.
- Develop and maintain RESTful APIs for seamless communication between applications and external systems.
- Design and enhance microservices-based solutions to support complex business requirements.
- Implement business process management solutions and automate workflows to improve operational efficiency.
- Develop API contract tests using WireMock and establish effective unit and integration testing practices.
- Manage application data using SQL and NoSQL databases, including PostgreSQL, MySQL, Oracle DB, and DynamoDB.
- Contribute to AI-enabled application development using vector search, pgvector, and retrieval-augmented generation (RAG) techniques.
- Apply tools such as Langfuse and RAGAS to monitor and evaluate AI application performance where applicable.
- Support cloud-based application deployment and maintenance using AWS, Docker, and Kubernetes.
- Maintain CI/CD pipelines and improve build, testing, and deployment processes.
- Collaborate with cross-functional teams, conduct code reviews, mentor developers, and guide technical implementation.
- Troubleshoot production issues, optimise application performance, and ensure code quality and system reliability.
Requirements
- Minimum 8+ years of experience in software development, backend architecture, and enterprise application integration.
- Strong experience in Java, Spring Boot, and backend application development.
- Hands-on experience with Spring WebFlux and reactive programming.
- Experience in RESTful APIs, microservices architecture, and distributed systems.
- Experience with BPM solutions and business workflow automation.
- Experience with WireMock or similar tools for API contract testing.
- Experience with relational databases such as PostgreSQL, MySQL, or Oracle DB, along with NoSQL databases such as DynamoDB.
- Experience in automated testing, including unit and integration testing.
- Experience in AWS cloud services, Docker, Kubernetes, and CI/CD pipelines.
- Experience in API security, authentication, and authorisation mechanisms.
- Experience in Python and backend frameworks such as FastAPI is an advantage.
- Experience with React, Next.js, JavaScript, HTML, and CSS for full-stack application development.
- Experience in pgvector, RAG pipelines, Langfuse, and RAGAS for AI-integrated applications.
- Strong analytical, problem-solving, communication, and technical leadership skills.
- Ability to guide development teams, review code, and coordinate technical delivery.