Senior Frontend Developer

EY • Toronto, ON

4d • Onsite

About The Position

As a Senior Frontend Developer within EY’s AI Centre of Excellence (COE) in the Office of the Chief Technology Officer, you will play a pivotal role in designing and building high‑impact, user‑centric applications that power EY’s next generation of AI‑driven solutions. Your primary focus will be the development of impactful and visually refined React‑based interfaces that seamlessly integrate with backend and AI services. Working closely with product managers, data scientists, and engineering teams, you will translate complex technical and business requirements into clean, scalable, and production‑ready frontend solutions. In this role, you will provide technical leadership across frontend engineering, driving best practices in design, usability, performance, and code quality. You’ll collaborate cross‑functionally with backend engineers, DevOps, testers, and product stakeholders to deliver robust, enterprise‑grade applications that help to solve real client challenges and create measurable business impact. If you thrive at the intersection of modern frontend engineering, AI‑enabled products, and real‑world impact, and are motivated by shaping industry‑defining platforms this role offers a unique opportunity at EY.

Requirements

• Bachelor's or Master's degree in Computer Science, Software Engineering, Information Technology, or a related field.
• 4–6 years of professional frontend or full-stack development experience, with a strong focus on React.
• Strong proficiency in React and TypeScript
• Thorough understanding of modern React patterns (hooks, context, server state management)
• Demonstrated experience with HTML5, CSS3, and modern styling approaches (e.g., Tailwind CSS, CSS Modules, Styled Components)
• Comfortable integrating with RESTful APIs and working with backend teams
• Exposure to backend technologies (e.g., Python, .NET, Node.js) to support effective full‑stack collaboration
• Familiarity with testing frameworks (Jest, React Testing Library, Playwright)
• Understanding of state management libraries (Redux, Zustand, TanStack Query)
• Strong analytical skills and the ability to debug complex frontend issues
• Clear written and verbal communication skills, with the ability to explain technical decisions to both technical and non-technical audiences

Responsibilities

• Lead and manage a fullstack development team, both onshore and offshore, enabling effective collaboration and communication across all team members.
• Set and execute frontend engineering standards and development practices, establishing scalable processes that enable teams to effectively use AI‑assisted coding platforms while maintaining code quality, performance, accessibility and user experience
• Lead the design, development, and deployment of React-based web applications, ensuring high performance, responsiveness, and a polished user experience
• Partner with UI/UX designers to implement intuitive, accessible interfaces that present AI outputs and complex data in a clear and engaging way
• Connect frontend applications to RESTful and real-time backend services, handling data fetching, caching, error states, and loading experiences.
• Work closely with business stakeholders and backend teams to gather requirements, translate them into technical specifications, and deliver robust solutions.
• Maintain high standards through code reviews, automated testing, and CI/CD best practices.
• Provide guidance to junior developers, share knowledge across the team, and help establish frontend standards and patterns.
• Identify and troubleshoot issues across the frontend stack, ensuring timely resolution and a smooth development workflow.
• Stay current with the React ecosystem and modern frontend tooling, and bring new ideas to improve our applications and developer experience.
• Ensure that the application adheres to accessibility standards and implement security best practices to protect sensitive client data.

Benefits

• competitive compensation package
• comprehensive medical, prescription drug and dental coverage
• a defined contribution pension plan
• a great vacation policy plus firm paid days that allow you to enjoy longer long weekends throughout the year, statutory holidays and paid personal days (based on province of residence)
• a range of exciting programs and benefits designed to support your physical, financial and social well-being
• Support and coaching from some of the most engaging colleagues in the industry
• Learning opportunities to develop new skills and progress your career
• Networking opportunities to engage with colleagues from all across the globe
• The freedom and flexibility to handle your role in a way that’s right for you

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Number of Employees: 5,001-10,000 employees