Senior Full Stack Developer (Java / ReactJS)

Helius Technologies; Singapore; On-site; SGD 90,000 - 130,000; Full time

Job summary

Helius Technologies Pte Ltd in Singapore is seeking a security‑focused software engineer to develop secure, scalable web applications using Java and Spring Boot. The role involves building robust, enterprise‑scale solutions with a focus on security and best practices.

You will design secure RESTful APIs, perform code reviews, and participate in security audits and compliance activities. A strong DevOps mindset with CI/CD experience is expected in a fast‑paced environment.

Qualifications

• 5 to 7+ years of professional software development experience.

Responsibilities

• Implement security patches and fixes across frontend and backend applications.
• Conduct code reviews focused on secure coding practices and vulnerability prevention.
• Ensure compliance with security guidelines, industry standards, and regulatory requirements.
• Participate in security audits, vulnerability assessments, and penetration testing remediation.
• Develop, test, and maintain secure, scalable, and high-performance web applications.
• Design and implement secure RESTful APIs and microservices using Spring Boot.

Skills

Security-minded

Secure coding

Code review

Enterprise-scale apps

Vulnerability remediation

Tools

React.js

Java

Spring Boot

Spring Security

PostgreSQL

MySQL

MSSQL

OAuth2

OIDC

SAML2

JWT

RESTful APIs

Microservices

CI/CD

Job description

Key Responsibilities

• Implement security patches and fixes across frontend and backend applications.
• Conduct code reviews focused on secure coding practices and vulnerability prevention.
• Ensure compliance with security guidelines, industry standards, and regulatory requirements.
• Participate in security audits, vulnerability assessments, and penetration testing remediation.
• Develop, test, and maintain secure, scalable, and high-performance web applications.
• Design and implement secure RESTful APIs and microservices using Spring Boot.

Required Experience

• 5 to 7+ years of professional software development experience.
• Proven experience with enterprise-scale internet-facing applications.
• Strong background in security vulnerability remediation and secure coding.

Technical Skills

Frontend

• Strong proficiency in React.js, HTML5, CSS3, and JavaScript (ES6+).
• Experience building secure, responsive, and high-performance web applications.

Backend

• Strong expertise in Java and Spring Boot.
• Experience with Spring Security and authentication/authorization frameworks.
• Strong knowledge of RESTful APIs and microservices architecture.
• Experience with PostgreSQL, MySQL, or MSSQL.

Security & DevOps

• Deep understanding of OWASP Top 10 vulnerabilities and remediation techniques.
• Experience with secure coding standards and security testing tools.
• Knowledge of OAuth2, OIDC, SAML2, and JWT.
• Familiarity with CI/CD pipelines, DevOps practices, and automated security testing.

Thanks, and Best Regards

Karanam Vijaya Kiran

(EA Registration no: R1443178)

HP:[phone]

Recruitment Manager

Helius Technologies Pte Ltd (EA Licence No: 11C3373)

https://www.linkedin.com/in/vijay-karanam-68462131/