Full Stack Developer (Java / ReactJS)

DNA AI TECHNOLOGIES PTE. LTD.; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

DNA AI TECHNOLOGIES PTE. LTD. is seeking an experienced Full Stack Developer to design, develop and modernize enterprise‑grade applications.

You will work on backend services with Java, Spring Boot, microservices, and secure APIs, while building responsive frontend with ReactJS. Expect collaboration with architects and product teams in Agile/Scrum environments. The role emphasizes cloud-native architectures, CI/CD, and performance tuning across relational and NoSQL databases, plus hands-on

Qualifications

• 6+ years of software engineering/development experience.

Responsibilities

• Design and develop enterprise applications using Java 8/11/17/21, Spring Boot, Spring Cloud and Hibernate.

Skills

Java 8/11/17/21

Spring Boot

Spring Cloud

Spring Security

Spring Data JPA

Hibernate

ReactJS

Microservices

REST APIs

Event-Driven Architecture

Kafka

RabbitMQ

JMS

AWS

Docker

Kubernetes

Jenkins

Git

CI/CD

OAuth2

JWT

API security

JUnit

Mockito

TDD

SonarQube

SOLID principles

Design patterns

Clean architecture

Production troubleshooting

Communication skills

Stakeholder management

Tools

PostgreSQL

MySQL

MS SQL

MongoDB

Snowflake

Redis

OpenAPI/Swagger

OpenAPI/Swagger

Job description

Domain: Enterprise Application Development / Cloud-Native Applications

Job Summary

We are seeking an experienced Full Stack Developer with strong hands‑on expertise in Java, Spring Boot, Microservices and ReactJS to design, develop and modernize enterprise‑grade applications.

The candidate should have strong backend engineering capabilities along with practical frontend, cloud, DevOps and production‑support experience.

Key Responsibilities

• Design and develop enterprise applications using Java 8/11/17/21, Spring Boot, Spring Cloud and Hibernate.
• Develop responsive frontend applications using ReactJS.
• Design and implement Microservices, REST/SOAP APIs and event‑driven solutions.
• Build integrations using Kafka, RabbitMQ and JMS.
• Modernize legacy applications into scalable, cloud‑native architectures.
• Implement secure APIs using OAuth2, JWT, Okta and enterprise security standards.
• Develop and optimize applications across relational and NoSQL databases.
• Implement CI/CD and deployments using Jenkins, Docker and Kubernetes.Develop and deploy applications on AWS.
• Perform code reviews, automated testing, performance tuning and production troubleshooting.
• Ensure applications meet requirements for scalability, security, high availability and resilience.
• Work with architects, product teams and business stakeholders in Agile/Scrum environments.

Mandatory Requirements

• 6+ years of software engineering/development experience.
• Strong hands‑on Java 8/11/17/21 experience.
• Strong Spring Boot, Spring Cloud, Spring Security, Spring Data JPA and Hibernate.
• Strong hands‑on ReactJS experience.
• Strong knowledge of Microservices, Distributed Systems, REST/SOAP APIs and Event-Driven Architecture.
• Experience with Kafka, RabbitMQ and JMS.
• Strong database experience with PostgreSQL, MySQL, MS SQL, MongoDB, Snowflake and/or Redis.
• Strong AWS experience including EC2, ECS/Fargate, RDS, S3 and CloudWatch.
• Experience with Docker, Kubernetes, Jenkins, Git and CI/CD.
• Strong knowledge of OAuth2, JWT and API security.
• Experience with JUnit, Mockito, TDD and SonarQube.
• Strong understanding of SOLID principles, design patterns and clean architecture.
• Experience troubleshooting complex production and performance issues.
• Strong communication, problem-solving and stakeholder‑management skills.

Preferred Skills

• Angular experience in addition to ReactJS.
• OpenAPI / Swagger.
• DDD and cloud‑native architecture.
• Zero‑downtime deployment and high‑availability systems.
• Experience leading or mentoring development teams.
• Experience in Healthcare/Telehealth, Trade & Logistics, Retail, SaaS or E-learning.