DNA AI TECHNOLOGIES PTE. LTD.
Full Stack Developer (Java / ReactJS)
Skills
3 days ago
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Important information
Contract type:
Freelance / Contract, Temporary
Location:
Singapore
Work mode:
Onsite
Published on:
17 October 2026
What they need
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
.
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