Senior Full Stack Developer (React/Typescript/Node.js)

JOB DESCRIPTION

Overview: On behalf of our client, Affinity is seeking an experienced Senior Full Stack Developer to join their engineering team in Canada. This is a full-time opportunity for a seasoned engineer who can contribute across both backend and frontend development, with a strong emphasis on building scalable, distributed applications and microservices. The successful candidate will bring 10+ years of professional full stack development experience and strong hands-on expertise with TypeScript, Node.js, PostgreSQL, RabbitMQ, Redis, and React.

Responsibilities

• Design, build, and maintain scalable full stack applications, backend services, APIs, and user-facing features.
• Develop backend services using TypeScript and Node.js.
• Build and maintain modern frontend applications and reusable UI components using React.
• Design, develop, and support microservices-based architectures.
• Build highly scalable systems leveraging asynchronous processing, messaging, and event-driven architecture.
• Work extensively with PostgreSQL, RabbitMQ, and Redis within distributed application environments.
• Design and maintain robust RESTful APIs and integrations.
• Contribute to system architecture decisions and drive engineering best practices across the full technology stack.
• Partner with cross-functional team members to scope, design, and plan technical initiatives.
• Lead or participate in technical discussions with internal and external stakeholders when required.
• Conduct thoughtful code reviews and contribute to improving overall code quality.
• Troubleshoot production issues and help resolve complex technical problems across frontend and backend systems.
• Develop solutions with performance, scalability, reliability, and usability in mind.
• Contribute to CI/CD processes, automated testing, and deployment practices.
• Mentor junior developers and support their technical growth.
• Help onboard new engineers and promote strong engineering standards and collaborative development practices.

Qualifications

• 10+ years of professional full stack software development experience.
• Strong hands-on experience with TypeScript.
• Strong hands-on backend development experience with Node.js.
• Strong hands-on frontend development experience with React.
• Strong experience working with PostgreSQL.
• Hands-on experience with RabbitMQ and asynchronous/message-driven processing.
• Hands-on experience with Redis.
• Demonstrated experience designing, building, and supporting microservices architectures.
• Strong experience designing and maintaining RESTful APIs.
• Deep understanding of asynchronous programming, distributed systems, and scalable application design.
• Strong understanding of software architecture principles, algorithms, and data structures.
• Experience with modern JavaScript (ES6+) and contemporary frontend development practices.
• Experience with automated testing and modern software development practices.
• Strong working knowledge of Git and collaborative development workflows.
• Experience working within Agile development environments.
• Experience with containerization technologies such as Docker.
• Experience with AWS services such as EC2, S3, RDS, and CDN solutions.
• Experience with CI/CD pipelines and deployment automation.
• Experience working in Linux environments such as Ubuntu or Debian.
• Familiarity with additional programming languages such as Go, Rust, Python, or Java.
• Experience with TDD/BDD and modern JavaScript testing frameworks such as Jest, Mocha, or Jasmine.