Senior Frontend Developer

At EY, we’re all in to shape your future with confidence. 

We’ll help you succeed in a globally connected powerhouse of diverse teams and take your career wherever you want it to go. 

Join EY and help to build a better working world. 

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.

This job posting relates to an existing vacancy within our organization.  

Your key responsibilities

• Team Leadership: Lead and manage a fullstack development team, both onshore and offshore, enabling effective collaboration and communication across all team members.
• Drive Innovation: 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
• Frontend Development: Lead the design, development, and deployment of React-based web applications, ensuring high performance, responsiveness, and a polished user experience
• UI/UX Integration: Partner with UI/UX designers to implement intuitive, accessible interfaces that present AI outputs and complex data in a clear and engaging way
• API Integration: Connect frontend applications to RESTful and real-time backend services, handling data fetching, caching, error states, and loading experiences.
• Collaboration: Work closely with business stakeholders and backend teams to gather requirements, translate them into technical specifications, and deliver robust solutions.
• Code Quality: Maintain high standards through code reviews, automated testing, and CI/CD best practices.
• Mentorship: Provide guidance to junior developers, share knowledge across the team, and help establish frontend standards and patterns.
• Problem-Solving: Identify and troubleshoot issues across the frontend stack, ensuring timely resolution and a smooth development workflow.
• Continuous Improvement: Stay current with the React ecosystem and modern frontend tooling, and bring new ideas to improve our applications and developer experience.
• Compliance and Accessibility: Ensure that the application adheres to accessibility standards and implement security best practices to protect sensitive client data.

Skills and attributes for success

• Education: Bachelor's or Master's degree in Computer Science, Software Engineering, Information Technology, or a related field.
• Experience: 4–6 years of professional frontend or full-stack development experience, with a strong focus on React.
• Technical Skills:
• 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)
• Problem-Solving: Strong analytical skills and the ability to debug complex frontend issues
• Communication: Clear written and verbal communication skills, with the ability to explain technical decisions to both technical and non-technical audiences

What we offer

At EY, our Total Rewards package supports our commitment to creating a leading people culture - built on high-performance teaming - where everyone can achieve their potential and contribute to building a better working world for our people, our clients and our communities. It's one of the many reasons we repeatedly win awards for being a great place to work.

We offer a competitive compensation package where you’ll be rewarded based on your performance and recognized for the value you bring to our business. In addition, our Total Rewards package allows you decide which benefits are right for you and which ones help you create a solid foundation for your future.  Our Total Rewards package includes a 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), and a range of exciting programs and benefits designed to support your physical, financial and social well-being. Plus, we offer:

• 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

EY reports salary ranges in accordance with applicable provincial pay transparency legislation. Individual salaries within the anticipated salary ranges noted below are determined through a wide variety of factors including but not limited to internal equity, education, relevant experience, knowledge, and applicable skill sets.  

• Toronto: $88,000 to $132,000  

Inclusiveness at EY 

Inclusiveness is the heart of who we are and how we work. We’re committed to fostering an environment where differences are valued, policies and practices are equitable, and our people feel a sense of belonging. We embrace diversity and are committed to combating systemic racism, advancing gender equity and women in leadership, advocating for the 2SLGBTQIA+ community, promoting our neuroinclusion and accessibility initiatives, and are dedicated to amplifying the voices of Indigenous peoples (First Nations, Inuit, and Métis) nationally as we strive towards reconciliation. Our diverse experiences, abilities, backgrounds, and perspectives make our people unique and help guide us. Because when people feel free to be their authentic selves at work, they bring their best and are empowered to build a better working world.  

Learn about our commitment to Inclusiveness at 

EY | Building a better working world

EY is building a better working world by creating new value for clients, people, society and the planet, while building trust in capital markets.

Enabled by data, AI and advanced technology, EY teams help clients shape the future with confidence and develop answers for the most pressing issues of today and tomorrow.

EY teams work across a full spectrum of services in assurance, consulting, tax, strategy and transactions. Fueled by sector insights, a globally connected, multi-disciplinary network and diverse ecosystem partners, EY teams can provide services in more than 150 countries and territories.

At EY, we use artificial intelligence (AI) tools as one element of our recruitment process to enhance efficiency and improve the candidate experience. While AI supports us in our process, human judgment and decision-making remain integral in our candidate experience. We are committed to the responsible use of AI, and our practices are continuously reviewed and refined to ensure they align with the highest ethical principles and regulatory requirements.

To all recruitment agencies: EY does not accept unsolicited resumes from recruitment agencies. Any resumes submitted without a prior agreement or request from our hiring team will not be considered. EY is not responsible for any fees related to unsolicited resumes.