MERN Stack Developer (React & Node.js)

Client: RETAIL Industry
Location: 3 day/week on site (Markham) - 6 Staples Dr
Duration: 6-month contract

Day-to-Day Responsibilities

Colabra is looking for a MERN stack developer to join a large retail client sitting in Markham. The successful candidate will be responsible for leading a team of five developers while contributing hands-on to both front-end and back-end development efforts within a large retail e-commerce environment. This includes managing daily production activities, delivering new project features, and ensuring overall platform stability.

Key responsibilities include:

• Leading, mentoring, and supporting a team of five developers.

• Overseeing daily production operations, including incident management, troubleshooting, and resolution.

• Performing code reviews, managing team performance, and driving continuous improvement initiatives.

• Developing and enhancing front-end features using React (approximately 70% of development workload).

• Supporting back-end development using Node.js and TypeScript (approximately 30%).

• Working with MongoDB NoSQL databases for designing, querying, and optimizing data structures.

• Managing production logs and supporting debugging and issue resolution for the e-commerce platform.

• Contributing to new project work aligned with retail e-commerce initiatives.

• Building, deploying, and maintaining code within an Azure cloud environment using CI/CD pipelines.

• Collaborating with cross-functional groups to ensure timely delivery of enhancements and platform updates.

Required Skills

• 5–8 years of professional software development experience.

• Strong hands-on experience with React and the MERN stack (MongoDB, Express.js, React, Node.js).

• Deep front-end expertise (70%) React combined with solid back-end experience in Node.js (30%).

• Proven experience leading or mentoring development teams in a fast-paced or production environment.

• Practical experience working in Azure cloud, including CI/CD, deployments, and build pipelines.

• Strong knowledge of MongoDB and NoSQL data modeling.

• Experience supporting production environments, debugging, and resolving issues in real time.

• Experience working on high-traffic or enterprise-level web applications is an asset.

Nice-to-Haves

• Experience with C# or .NET.

• Experience with Shopify or e-commerce platform integrations.