Backend Engineer (Java Microservices – Card & Unsecured Loan)

TRINITY CONSULTING SERVICES PTE. LTD.; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

TRINITY CONSULTING SERVICES PTE. LTD. is seeking an experienced backend Java developer in Singapore to design, build, and deploy scalable microservices and RESTful APIs. You will work in enterprise environments, leveraging Java 11/17, Spring Boot, and OpenAPI/Swagger to deliver robust backend solutions.

You will collaborate in Agile/Scrum or Kanban teams, use Docker and Kubernetes for deployment, and apply testing with JUnit 5, Mockito, and Testcontainers to ensure quality and resilience.

Qualifications

• 3–6 years of hands-on backend development in enterprise environments.
• Strong proficiency in Java 11/17 and Spring Boot (Web, Security, Data).
• Experience designing, developing, and deploying RESTful APIs and microservices with OpenAPI/Swagger.
• Knowledge of relational databases and SQL optimization; experience with PostgreSQL, MariaDB, or Oracle.
• Hands-on experience with Docker and Kubernetes/OpenShift; testing with JUnit 5, Mockito, Testcontainers.
• Experience with Agile/Scrum or Kanban environments.

Skills

Java

Spring Boot

REST APIs

Microservices

PostgreSQL

SQL optimization

Kafka

RabbitMQ

Docker

Kubernetes/OpenShift

JUnit 5

Mockito

Testcontainers

Agile/Scrum

Kanban

Problem-solving

Teamwork

Communication

Tools

OpenAPI/Swagger

Docker

Kubernetes/OpenShift

JUnit 5

Mockito

Testcontainers

Job description

Job Requirements

• 3–6 years of hands-on backend development experience in enterprise environments.
• Strong proficiency in Java (11/17/21) and Spring Boot (Spring Web, Security, Data).
• Proven experience designing, developing, and deploying RESTful APIs and microservices using OpenAPI/Swagger.
• Strong knowledge of relational databases (PostgreSQL, MariaDB, Oracle), SQL optimization, indexing, and transaction management.
• Hands-on experience with Apache Kafka or RabbitMQ for event-driven messaging.
• Practical experience with Docker and Kubernetes/OpenShift.
• Proficiency in automated testing using JUnit 5, Mockito, and Testcontainers.
• Experience working in Agile/Scrum or Kanban environments.
• Strong analytical, problem-solving, communication, and teamwork skills.

Preferred Skills (Added Advantage)

• Experience with legacy Java EE/J2EE applications (EJB, Servlets, SOAP/WSDL, WebSphere, WebLogic, JBoss).
• Banking, Financial Services, or FinTech experience, particularly in credit cards and unsecured lending.
• Knowledge of loan origination, credit bureau integration, revolving credit lines (Cashline), and Straight-Through Processing (STP).
• Familiarity with microservice resilience patterns, API contract testing, and distributed tracing (Resilience4j, Pact, OpenTelemetry, Jaeger).