Senior Software Engineer - Commerce Platform (HTML, CSS, JavaScript)

Senior Front-End Software Engineer - Commerce Platform

Location: Toronto, ON (Remote available — must be based in Canada)

Contract Length: 12 months

Pay: $50.00 - $65.00/HR CAD

Team: Commerce Experience (Payments, Loyalty, Coupons)

Application Process: It is best to apply via the medium on which you are seeing this posting. If you encounter technical difficulties submitting your resume, please send a Word version of your resume to Mauncho Ogega at View email address on click.appcast.io

About the Job

As a Senior Front-End Software Engineer, you will focus on building exceptional web experiences within our clients Commerce Platform. You'll work closely with product designers and cross-functional engineers to create interfaces that are accessible, performant, and deliver a frictionless checkout and payment experience.

You will set the bar for front-end engineering excellence—driving high-quality UI design, reusable component architecture, client-side performance, accessibility standards, and intuitive user interaction patterns. While the role involves collaborating with full-stack and backend teams, your primary responsibility will be creating delightful, reliable, and scalable front-end solutions.

You'll influence the full product lifecycle—from problem exploration to delivering polished, production-ready front-end features. You'll also champion best practices, maintain consistency across our UI ecosystem, and contribute to broader engineering initiatives that elevate our platform.

About You – Minimum Qualifications

• 6+ years of professional front-end or full-stack development experience, with a strong emphasis on UI engineering.
• Expertise in modern web technologies such as HTML, CSS, JavaScript, and frameworks like React.js (or comparable modern front-end frameworks).
• Strong understanding of UX principles, usability patterns, user flows, and interaction design.
• Hands-on experience with front-end testing tools such as Jest, Mocha, or Enzyme.
• Familiarity with server-driven front-end development and experience integrating with back-end frameworks such as Ruby on Rails.
• Experience with GraphQL APIs and building robust client-side integrations.
• Understanding of relational data concepts (e.g., Postgres, Snowflake) as they relate to UI development and data flows.
• Knowledge of client-side caching, state management patterns, and asynchronous data handling.
• Experience building or integrating monitoring tools for front-end performance and error tracking (e.g., Sentry, DataDog, CloudWatch, OpsGenie).
• A proactive, adaptable mindset with the ability to propose and implement enhancements to improve the user experience.

Preferred Qualifications

• Experience building front-end features for payment flows, checkout systems, or other high-complexity eCommerce UI surfaces.
• Familiarity with payment systems, digital wallets, and payment service provider workflows as they relate to user experience.
• Understanding of eCommerce order management and the front-end components that support order lifecycle visibility.
• Experience designing or implementing invoicing, billing, or financial UI flows.
• Comfort working with experimentation frameworks and data-driven user experience optimizations (A/B tests, feature flags, etc.).
• Experience ensuring cross-browser compatibility, accessibility (WCAG), and building reusable UI components or front-end libraries.

Everforth Apex is a world-class IT services company that serves thousands of clients across the globe. When you join Everforth Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRateds Best of Staffing® in Talent Satisfaction in the United States and Great Place to Work® in the United Kingdom and Mexico.

Everforth Apex Benefits Overview: In terms of professional development, Everforth Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA.