Lumerate is growing rapidly and we’re actively hiring for a Senior Frontend Developer based in the Greater Toronto Area to join our team!

Who is Lumerate?

We help our customers achieve the full picture of their industries. We also strive to achieve our own personal full pictures from a career fulfillment and learning perspective. We’re in the business of gathering intelligence about industries and delivering it to the right people within those industries through innovative software interfaces. Our vision is to be the world's most useful and trusted source of information for professionals seeking to understand what's happening in their industry.

Our mission: To deliver industry awareness to an ever-increasing number of people, in whatever way helps them to make the most informed decisions, take the most immediate action and be the most awesome at their unique jobs.

What the role looks like:

• Frontend architecture — React component patterns, state management strategy, styling conventions, and build tooling within a Rails monolith
• Component library (LDS) — maintaining and extending our internal design system built on
• Supernova design tokens and SCSS
• Migration strategy — incrementally moving legacy code (Reflux stores, createReactClass, jQuery) to modern React (hooks, Context, functional components) without large rewrites but pragmatic decisions to make small meaningful changes.
• Testing strategy — a three-tier JS testing approach using Jest + React Testing Library (unit/integration) and Playwright (UI/visual regression)
• Frontend standards — defining and enforcing patterns for component architecture, styling, data fetching, and code organization

Who will be successful in this role?

• 5+ years with React in production, with deep knowledge of hooks, Context, component composition patterns (compound components, render props, forwardRef/useImperativeHandle)
• Experience working within a server-rendered framework (Rails, Django, Laravel, or similar)
• Strong CSS/SCSS skills — you can architect a design token system, write maintainable component styles, and make sound decisions about when to use utility classes vs. semantic SCSS
• Testing expertise — Jest, React Testing Library, and ideally Playwright or Cypress. You test behavior, not implementation details
• JavaScript fundamentals — ES modules, async/await, Proxy, private class methods, build tooling (Webpack/Vite).
• Someone who is detail oriented. You’ll see this request to add the name of the landmark you find at these coordinates 35.6245331521636, 139.77549622036153 in your cover letter

What we’d love to see in your previous work experience:

• Frontend senior developer with 5+ yrs of experience
• Has experience working closely with the design team and with junior developers
• Experience with Rails + React (Webpacker/Shakapacker)
• Track record of technical leadership — you've defined frontend standards, run code reviews, and mentored developers.
• Migrated legacy frontend code (jQuery, Backbone, Reflux, class components) incrementally
• Experience with design system development (component libraries, Storybook, design tokens)
• Performance optimization (bundle splitting, lazy loading, render profiling)

Why Lumerate? Fancy perks etc.

• Help shape the future of a bootstrapped and profitable Canadian tech company
• Earn yourself some equity (employee options make up 20% of the value of the company at all times)
• Be a part of a tightly-knit team with a thriving hybrid culture

Salary : $120,000-$130,000 CAD Annually

Location : Remote or Hybrid in the Greater Toronto Area

Start Date: May 1st, 2026

Already picturing your first day as our Senior Frontend Developer? Apply now with your cover letter + resumé! We encourage you to apply even if you don’t meet all of the listed qualifications. If your experience aligns mostly with what we are looking for, we’d love to hear from you!

This posting is for an existing vacancy. Lumerate is committed to creating a diverse environment and is proud to be an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.