FullStack Engineer

Singapore · 3+ years experience · Onsite · Posted Oct 8, 2026

At a glance

Sonar is seeking a FullStack Engineer to design, develop, and maintain 0-to-1 applications for AI-powered solutions.
The role focuses on building scalable, high-performance systems that support the company's mission in AI code verification and governance.

Design, develop, and maintain 0-to-1 applications for AI-powered solutions focusing on automation, high performance, scalability, and cost efficiency.
Participate in all aspects of agile software development, from design to deployment.
Build and integrate RESTful APIs to support dynamic web and cloud applications.
Develop scalable backend services and databases to enhance application performance.
Architect and design end-to-end systems optimized for speed and scale.
Ensure responsive design and seamless user experience.
Maintain best practices by following TDD and ensuring unit/integration tests are synced.
Debug and troubleshoot reported issues and incorporate feedback from other stakeholders.
Participate in code reviews and provide constructive feedback to other developers.

Bachelor’s degree (or equivalent) in Computer Science, Engineering, or related field.
At least 3 years of experience as a Software Engineer or in a similar role.
Experience working with Agentic technologies (e.g. Codex, Claude, CoPilot).
Experience in building web applications and designing and integrating RESTful APIs.
Experience in developing using Java Spring framework or similar.
Experience developing in Agile practices and principles (Scrum/Kanban).
Knowledge of containerization and orchestration technologies, i.e Docker/Kubernetes.
Experience with CI/CD pipelines for automated deployments.
Excellent debugging, optimization skills, communication, and teamwork skills.

In-office culture with three anchor days: Mondays, Tuesdays, and Thursdays.
Candidates must be based in the location the role is posted; relocation support is available for the right person.