Software Developer

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

The Platform Software Developer is responsible for developing, enhancing and supporting Certis’ Security enterprise platform. The role involves full-stack development across web applications, microservices, APIs, real-time messaging, integrations and data services, with a strong focus on secure, scalable and maintainable software.

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.

Technical Skills:

• Backend: C#, ASP.NET Core, Web API and asynchronous/service-based development.
• Database: PostgreSQL and/or SQL Server; knowledge of Redis.
• Integration & Messaging: REST/JSON APIs, NATS/Kafka/RabbitMQ or equivalent messaging technologies.

Requirements:

• Degree or diploma in Computer Science, Software Engineering, Information Technology or a 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.