Lead Frontend Engineer

kcura; Kraków; Hybrid; PLN 270,000 - 406,000; Full time

Benefits offered by this job

DTO

Parental leave

Equity program

Benefits

Job summary

Relativity is seeking a Lead Frontend Software Engineer to guide the Engineering Platform team. You’ll shape frontend architecture, implement shared UI frameworks, and mentor engineers to deliver scalable, accessible UI across a cloud-native ecosystem.

You’ll work with architects and product teams to evolve a micro frontend approach, driving performance, testability, and high-quality user experiences at scale.

Qualifications

• 5-7+ years of frontend development experience with leadership in a technical role.
• Advanced proficiency in JavaScript (ES6+), TypeScript, and React.
• Experience building shared design systems with PrimeReact, Material UI, Bootstrap, or Tailwind.
• Strong knowledge of semantic HTML, modern CSS, and preprocessors (SASS/LESS).
• Experience implementing Micro Frontend architectures in large-scale systems.
• Familiarity with RESTful APIs, GraphQL, and async patterns.
• Frontend performance profiling and cross-browser testing expertise.
• Deep knowledge of accessibility standards (WCAG).
• Hands-on experience with CI/CD, and tooling (Vite/Webpack) and testing (Jest/Cypress/Playwright).

Responsibilities

• Set and communicate technical vision for frontend architecture across multiple platform teams.
• Lead the development of shared UI infrastructure, design system components, and micro frontend integration strategies using React, TypeScript, and PrimeReact.
• Collaborate with Staff and Principal Engineers to align with long-term architectural goals and cloud-first principles.
• Partner with product, UX, and engineering leadership to define scalable frontend capabilities aligned to customer needs.
• Guide the team on accessibility, performance, test automation, and maintainability practices.
• Drive architectural reviews, pair programming, mentoring, and hands-on development.
• Contribute to and evolve CI/CD workflows, component versioning strategies, and documentation processes.
• Champion frontend performance techniques including lazy loading, code splitting, asset optimization, and telemetry.
• Define and enforce UI testing standards including unit/integration/end-to-end testing (Jest, Cypress, Playwright).
• Mentor senior and mid-level engineers to strengthen technical leadership.
• Lead initiatives exploring AI-enhanced UI/UX, including smart components and adaptive interfaces.

Skills

JavaScript

TypeScript

React

Design systems

Semantic HTML

CSS

SASS/LESS

Micro Frontend

RESTful APIs

GraphQL

CI/CD

Accessibility WCAG

Jest

Cypress

Playwright

Backend knowledge

UX principles

AI-driven UI/UX

Figma/Sketch/XD

Tools

PrimeReact

Material UI

Bootstrap

Tailwind

Vite/Webpack

Job description

Posting Type

Hybrid

Job Overview

WHO WE ARE

Relativity is a leading legal data intelligence company building technology that helps users organize data, discover the truth, and act on it with confidence. Our AI-powered, cloud platform, RelativityOne, transforms massive volumes of complex information into actionable insights for litigation, investigations, regulatory inquiries, data breach responses, and other high-stakes legal work where accuracy and trust are crucial.

The world’s largest law firms, corporations, and government agencies rely on Relativity’s legal AI software to securely surface and manage the most relevant and impactful information in their matters. Beyond our commercial impact, we are committed to expanding access to technology and supporting pro bono legal work.

WHAT WE DO

At Relativity, engineers do more than write code - they build systems that enable users to uncover insights from complex data at scale using cloud-native architecture, AI, and modern tools.

The Engineering Platform team enables engineering excellence across Relativity by building shared frameworks, developer tooling, and platform capabilities that improve scalability, consistency, and delivery velocity across products.

ABOUT THE ROLE

We’re seeking a Lead Frontend Software Engineer to join the Engineering Platform team at Relativity. In this role, you’ll drive the direction of our frontend architecture, lead implementation of shared UI frameworks and design systems, and mentor engineers while solving complex frontend challenges at scale.

This is a technical leadership role focused on platform-wide impact, designing modular, performant, and maintainable UI infrastructure that powers a modern cloud-native application ecosystem. You’ll collaborate with architects, Staff Engineers, and product teams to evolve our Micro Frontend architecture and enable high-quality, accessible, and intelligent user experiences across products.

You’ll be working in a fast-moving but stable environment where initiative, clarity, and action are highly valued, and your leadership directly enables hundreds of engineers to move faster and build better.

Job Description and Requirements

WHAT YOU’LL DO

• Set and communicate technical vision for frontend architecture across multiple platform teams.
• Lead the development of shared UI infrastructure, design system components, and micro frontend integration strategies using React, TypeScript, and PrimeReact.
• Collaborate with Staff and Principal Engineers to ensure alignment with long‑term architectural goals and cloud‑first principles.
• Partner with product, UX, and engineering leadership to define and deliver scalable frontend capabilities aligned to customer needs and business outcomes.
• Guide the team on best practices in accessibility, performance, test automation, and maintainability.
• Drive technical excellence through architectural reviews, pair programming, mentoring, and hands‑on development.
• Contribute to and evolve CI/CD workflows, component versioning strategies, and documentation processes.
• Champion frontend performance techniques including lazy loading, code splitting, asset optimization, and telemetry.
• Define and enforce standards for UI testing, including unit, integration, and end‑to‑end testing using Jest, Cypress, or Playwright.
• Mentor senior and mid‑level engineers, strengthening technical leadership across the team.
• Lead initiatives exploring AI‑enhanced UI/UX, including smart component behaviour, generative layout patterns, and adaptive interfaces.

WHAT WE’RE LOOKING FOR

Required

• 5-7+ years of professional frontend development experience, including 2+ years in a technical leadership or lead engineer role.
• Advanced proficiency in JavaScript (ES6+), TypeScript, and React.
• Deep experience building and managing shared design systems using frameworks such as PrimeReact, Material UI, Bootstrap, or Tailwind.
• Strong understanding of semantic HTML, modern CSS, CSS preprocessors (SASS/LESS), and responsive UI design.
• Experience implementing Micro Frontend architectures or modular UI strategies in large‑scale systems.
• Familiarity with RESTful APIs, GraphQL, and asynchronous programming patterns including async/await, Promises, and streaming updates.
• Experience with frontend performance profiling and cross‑browser testing strategies.
• Deep knowledge of accessibility standards (WCAG) and commitment to inclusive design.
• Hands‑on experience with CI/CD pipelines, frontend build tooling such as Vite or Webpack, and testing frameworks.

Preferred

• Background in .NET or backend technologies such as Node.js or Python to support cross‑stack collaboration.
• Understanding of UX principles and experience contributing to design system governance and design‑engineering alignment.
• Experience with AI‑driven UI/UX, including chatbot integration, recommendation engines, personalization, or adaptive layouts.
• Familiarity with design and prototyping tools such as Figma, Sketch, or Adobe XD.

WHY WE COULD BE A GREAT FIT

Impactful Mission

• Build systems that help customers organise data, discover the truth, and act on it in high‑stakes legal matters.

Engineering at Scale

• Work on distributed, cloud‑native systems that process large volumes of data.

Cutting‑Edge Technology

• Build with AI, cloud platforms, and scalable architectures shaping legal tech.

Growth and Ownership

• Gain experience owning systems end‑to‑end across cloud and distributed environments.

Collaborative Culture

• Work in a team focused on knowledge sharing and continuous improvement.

Inclusive Environment

• Diverse perspectives create stronger teams and better outcomes.

Compensation and Benefits

• Competitive salary, benefits, DTO, parental leave, and equity program.

Relativity is committed to competitive, fair, and equitable compensation practices.

This position is eligible for total compensation which includes a competitive base salary, an annual performance bonus, and long‑term incentives.

The expected salary range for this role is between 270000 and 406000PLN

The final offered salary will be based on several factors, including but not limited to the candidate's depth of experience, skill set, qualifications, and internal pay equity. Hiring at the top end of the range would not be typical, to allow for future meaningful salary growth in this position.

Required Skills

Documentations, Innovation, Leadership, Problem Solving, Process Improvements, Project Management, Quality Assurance (QA), Risk Management, Technical Knowledge, Troubleshooting