Senior Front End Engineer

Sellfire; Canada; Remote; CAD 100,000 - 140,000; Full time

Job summary

A leading company in high-velocity sales is seeking a Senior Frontend Engineer to develop scalable, performant product interfaces. This remote position emphasizes collaboration across teams and leverages AI for enhanced user experiences, requiring substantial experience in modern frontend technologies including React and TypeScript.

Qualifications

• 6+ years of experience building modern frontend applications.
• At least 3 years using React with functional components.
• Experience with application performance monitoring preferred.

Responsibilities

• Accountable for frontend experience across the Sellfire platform.
• Collaborate with QA, backend, and product teams to build features.
• Translate customer understanding into great UI.

Skills

React

TypeScript

Next.js

GraphQL

Performance optimization

Job description

About Sellfire

Sellfire is the #1 solution for high-velocity sales. We unlock consistently great performance for results-driven leaders at companies of all sizes. Are you interested in working with team on a mission to help customers put coins into a predictable machine and get dollars out?

We are a team of experienced CEOs, CROs, operators and technologists who live and breathe high-velocity sales. The way we work is guided by our values: Here to win championships, Have your back, Elevate your game.

About the Role

We’re looking for a Senior Frontend Engineer to deliver clean, scalable, and performant product interfaces across our product ecosystem. You will play a pivotal role in developing our React-based frontend architecture and collaborating closely with our product, design, and backend teams. You will leverage AI in your day-to-day and use it to power customer experiences. Your impact will be felt in every user interaction.

This is a remote position with some required travel to New York City and open to candidates residing in Eastern - Pacific timezones.

Key Responsibilities

• Be accountable for the frontend experience across the Sellfire platform — from component architecture to performance and code quality.

• Work closely with QA, backend, design, and product teams to build new features.

• Understand how our customers think and work — and translate that into great UI.

• Maintain and foster a learning mindset, researching new technologies and sharing knowledge with teammates

Background and Experience

• 6+ years of experience building modern, production-grade frontend applications in start-up environments.

• At least 3 years using React (functional components, state management, performance optimization).

• Proven track record of success delivering high-quality, highly available, scaled solutions.

• Comfort working across the stack, especially when debugging or integrating APIs.

• Strong proficiency with TypeScript, Next.js, and styled-component.

• Practical experience with technologies such as GraphQL, application performance monitoring, and feature flagging strongly preferred

• Experience with Twilio, Chrome extensions, and web application security are nice to have