Full Stack Engineer – Headless E-Commerce (Canada)

360training 360training.com is a rapidly growing leader in online training and certification across a wide range of industries and professions. 360training.com provides customers with the regulated training they need to get and keep jobs they want. Over the years, we have continued to grow our expansive library of regulatory-approved training courses with new content suited for today’s modern workforce. By offering these courses online, all 360training.com users experience the convenience and flexibility of earning their certifications in their own time, from anywhere in the world. We promote a culture of excellence centered around our two core values: Deliver Results and Do the Right Thing. That focus fosters the success of our employees, while maintaining a team-centric environment which inspires them to do their absolute best. One thing our associates get to experience is the ability to make an impact on day one of working here. 360training offers a compelling compensation package that ties to performance and impact. We offer statutory benefits, medical insurance, life insurance, paid time off, learning and growth opportunities, and a comprehensive employee engagement and wellness program. We are seeking a Principal Full-Stack Engineer – Headless E-Commerce to lead the design, development, and evolution of our modern commerce platform. This role is responsible for building scalable backend services and APIs using Node.js and JavaScript/TypeScript, while also contributing to frontend experiences with React. The ideal candidate will take ownership of features end-to-end, collaborate closely with Product and Design, and play a key role in shaping architecture, standards, and engineering best practices. This position requires strong expertise in backend development, experience with full-stack environments, and the ability to work in a fast-paced, evolving ecosystem, including headless commerce solutions such as Medusa JS. In addition to hands-on development, this role will mentor team members, support production systems, and drive continuous improvement to ensure high-quality, scalable, and efficient solutions aligned with business goals. Key Responsibilities: Design and build backend features using Node.js , JavaScript/TypeScript, and modern frameworks Develop and evolve APIs, services, and domain logic that power our commerce platform Work across the stack, including: Backend services and integrations Storefront and admin experiences using React Learn and extend Medusa JS as needed, including: Custom services and modules Plugins and integrations (payments, fulfillment, notifications) Collaborate closely with Product and Design to translate requirements into thoughtful technical solutions Own features end‑to‑end: design, implementation, testing, deployment, and iteration Contribute to architectural decisions and platform standards Review code, mentor teammates, and help raise engineering quality Participate in production support and continuous improvement efforts Position Requirements: Bachelor’s Degree in Information Technology or equivalent experience. 5+ years of professional experience building applications with Node.js and JavaScript/TypeScript Strong backend engineering fundamentals API design (REST, webhooks) Asynchronous processing Data modeling and relational databases (PostgreSQL or similar) Solid experience with React or modern front‑end frameworks Experience building and maintaining product platforms over time Comfort learning new frameworks and technologies as needed (e.g., Medusa) Ability to balance technical quality with product delivery Strong communication and collaboration skills Desired qualifications: Experience with Medusa JS or another headless commerce platform General e‑commerce knowledge: Carts, checkout flows, promotions, inventory, PIM Payment, tax, or shipping integrations (Stripe, PayPal, custom gateways) TypeScript‑first codebases Redis, background jobs, or message queues Automated testing (Jest, Playwright, Mocha, Supertest) Docker‑based development or CI/CD pipelines Soft Skills & Work Style: Excellent team player with ability to work independently and in time-sensitive environments. Motivated self-starter with exceptional communication and interpersonal skills. Must have experience working in a team production environment. Comfortable working in a fast-paced migration environment. Dependable, enthusiastic, motivated, team player, detail-oriented. Great communication skills. Ability to learn new tools quickly to get the job done. Testing & Quality Working experience of testing tools like Playwright / Jest / Mocha / Supertest for Medusa JS. Key Performance Indicators;