Platform Software Engineer: Full-Stack, Secure & Scalable

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

Job summary

Certis is seeking a Platform Software Developer to build and maintain a Security enterprise platform. Role spans full-stack development across web apps, microservices, APIs, real-time messaging and data services with focus on secure, scalable software.

Responsibilities include UI and backend work with React/TypeScript and ASP.NET Core/C#, building REST APIs, real-time features, and event-driven integrations, and collaborating with architects, QA, DevOps and product teams to drive features from

Qualifications

• Degree or diploma in Computer Science, Software Engineering, Information Technology or related discipline, or equivalent practical experience.
• 3+ years of professional software development experience for Developer level; stronger independent design and troubleshooting capability is expected for Senior Developer level.
• Hands-on experience developing modern web applications, APIs or distributed enterprise systems.
• Good understanding of software engineering principles, clean code, testing, source control and secure development practices.
• Ability to understand business requirements and translate them into practical technical solutions.
• Good communication, problem-solving and teamwork skills.

Responsibilities

• Develop and maintain web applications and microservices using React/TypeScript and ASP.NET Core/C#.
• Build REST APIs, backend services, real-time features and event-driven integrations.
• Develop reusable capabilities across services and modules, ensuring consistency, scalability, and maintainability across the platform.
• Work with PostgreSQL/SQL Server, Redis and messaging technologies such as NATS, Kafka or RabbitMQ.
• Implement authentication and authorization using OAuth2/OIDC, RBAC and secure coding practices.
• Support Docker and Kubernetes-based deployments across cloud and on-premises environments.
• Write clean, testable and maintainable code, including appropriate unit and integration tests.
• Troubleshoot application, integration, database, messaging and deployment issues.
• Participate in requirement refinement, technical design, code review, testing and release activities.
• Work closely with architects, product owners, QA, DevOps and project teams to deliver features from requirement through release.
• Maintain relevant API, configuration and technical documentation.

Skills

C#

ASP.NET Core

Web API

React/TypeScript

REST APIs

NATS

Kafka

RabbitMQ

PostgreSQL

SQL Server

Redis

Docker

Kubernetes

Education

Degree or diploma in Computer Science / Software Engineering / Information Technology

Tools

Docker

Kubernetes

Redis

PostgreSQL

SQL Server

NATS

Kafka

RabbitMQ

Job description

Certis is seeking a Platform Software Developer to build and maintain a Security enterprise platform. Role spans full-stack development across web apps, microservices, APIs, real-time messaging and data services with focus on secure, scalable software.

Responsibilities include UI and backend work with React/TypeScript and ASP.NET Core/C#, building REST APIs, real-time features, and event-driven integrations, and collaborating with architects, QA, DevOps and product teams to drive features from