Lead JavaScript Full-Stack Developer (ReactJS, Next.js)

We are searching for an accomplished Lead JavaScript Full-Stack Developer with profound expertise and passion for engineering rich, responsive web and hybrid-mobile applications at scale. In this role, you'll leverage your mastery of JavaScript/TypeScript, React, and Next.js to define technical vision, lead engineering teams, and deliver fast, SEO-friendly, and mobile-first user interfaces that set the benchmark across the entire organization.

You'll own the design of outstanding web experiences that look and feel like native mobile apps, defining performance optimization strategies for both desktop and mobile web view browsers (including iOS Safari). Partnering closely with backend leads, UX designers, product owners, and engineering management, you'll translate complex interactive designs into elegant, modular, and reusable front-end architectures - while building, coaching, and scaling a high-performing team of engineers and championing best practices across the department.

Responsibilities

Define the technical vision and architecture for high-performance, scalable, and responsive web applications using React and Next.js (leveraging advanced features such as SSR, SSG, ISR, API routes, and Server Components)

Lead and coordinate cross-team initiatives to implement pixel-perfect, mobile-first designs that adapt seamlessly across devices, with a specific focus on optimizing layouts, animations, and touch interactions for mobile viewports (including iOS/Android browsers)

Establish organization-wide strategies for managing complex client-side state (e.g., Redux, Zustand, Context API) and oversee robust integrations with backend RESTful or GraphQL APIs

Own and drive performance engineering strategy across products - setting standards for profiling and optimizing applications for maximum loading speed, Core Web Vitals, and smooth rendering on lower-powered mobile devices

Establish engineering standards for clean, maintainable, and thoroughly tested JavaScript/TypeScript code; oversee code review culture, coding standards, and the long-term evolution of our shared UI component library and design system

Build, mentor, and grow a team of senior, mid-level, and junior developers; conduct performance reviews, foster career development, and cultivate a culture of technical excellence

Partner with product, design, and engineering leadership to shape the technical roadmap, influence company-wide architectural decisions, and align technical strategy with business goals

Drive hiring, onboarding, and technical evaluation processes to scale the front-end engineering organization

Requirements

5+ years of proven background in modern web development, including at least 1 year in a technical leadership role, with a strong track record of delivering complex, user-facing products to production at scale

Expert-level knowledge of JavaScript (ES6+), TypeScript, and React, including advanced patterns, performance tuning, and architectural best practices

Deep, production-grade expertise in the Next.js framework (App Router and Pages Router, Server Components, advanced rendering strategies) with experience defining framework-level standards

Strong command of modern CSS frameworks and methodologies (e.g., Tailwind CSS, styled-components, CSS Modules), with a proven ability to define and enforce styling architecture across large-scale, multi-team projects

Extensive expertise in optimizing web apps for mobile browsers, building PWAs (Progressive Web Apps), and architecting web view integrations within hybrid mobile containers

Proven background in architecting, launching, and evolving reusable component libraries and enterprise-grade design systems

Solid command of Git, CI/CD pipelines, and Agile/Scrum practices, with the ability to shape engineering processes and delivery workflows

Demonstrated experience leading engineering teams, mentoring senior engineers, driving cross-functional technical initiatives, and collaborating with executive stakeholders

Strong communication, decision-making, and stakeholder management skills

Excellent command of written and spoken English (B2+ level)

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