Senior Full Stack Developer

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.