Lead Front-End Developer (React)

EPAM Systems · Remoto, BR

We are looking for a **Lead Front\-End Developer** **with strong React expertise** to build responsive, accessible web experiences while shaping engineering standards and mentoring others. You will partner with cross\-functional peers and embed GenAI into daily delivery to improve speed and quality. Apply to help drive meaningful impact! **Responsibilities** * Design responsive, user\-friendly web applications with high accessibility standards * Architect reusable frontend libraries and frameworks to improve scalability and maintainability * Lead technical decisions for UI implementation, performance, and long\-term code health * Collaborate with product managers, designers, and backend engineers to deliver cohesive interfaces * Translate UI/UX wireframes into high\-quality React and JavaScript code and provide design feedback * Mentor junior developers on best practices, coding standards, and career growth * Lead code reviews to raise quality, consistency, and team learning * Optimize application performance to ensure fast load times and smooth interactions * Debug complex issues and ensure cross\-browser and cross\-device stability * Implement unit and end\-to\-end testing to reduce regressions and increase reliability * Coordinate with QA to identify, prioritize, and resolve defects before releases * Adopt GenAI tools in daily workflows and validate outputs against data and quality constraints * Drive continuous improvement by evaluating new frontend practices and GenAI\-enabled delivery methods **Requirements** * 5\+ years of front\-end development experience with JavaScript and React * Proven leadership skills mentoring developers and driving team alignment (1\+ years) * Hands\-on experience designing reusable UI architectures and scalable component libraries * Strong code review skills with clear, constructive feedback and quality standards * Solid project execution skills coordinating with product, design, backend engineering, and QA * Strong performance optimization skills for fast load times and smooth interactions * Hands\-on testing skills, including unit testing and end\-to\-end testing practices * Strong debugging skills across browsers and devices with a stability\-first mindset * Applied Generative AI skills using GenAI tools for research, drafting, analysis, and code generation * Strong prompt engineering skills for iterative, production\-grade outputs * Practical AI risk awareness covering hallucinations, context limits, and data sensitivity validation * English proficiency at a B2\+ level **Nice to have** * AI security fundamentals, including prompt injection risks and data classification handling * Cybersecurity \& Trust knowledge relevant to secure frontend delivery * GenAI application development experience connecting GenAI tools to APIs and internal data sources * GenAI in SDLC experience building reusable prompts, agent workflows, or automation templates **We offer** * International projects with top brands * Work with global teams of highly skilled, diverse peers * Healthcare benefits * Employee financial programs * Paid time off and sick leave * Upskilling, reskilling and certification courses * Unlimited access to the LinkedIn Learning library and 22,000\+ courses * Global career opportunities * Volunteer and community involvement opportunities * EPAM Employee Groups * Award\-winning culture recognized by Glassdoor, Newsweek and LinkedIn *EPAM is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, age, sexual orientation, gender identity or expression, disability, protected veteran status, or any other characteristic protected by applicable law.*