Senior UX Engineer - Engineering Platform

Relativity; Kraków; Hybrid; PLN 173,000 - 259,000; Full time

Benefits offered by this job

DTO

Parental leave

Equity program

Job summary

Relativity is seeking a Senior UX Engineer to design, build, and refine React-based experiences for complex workflows. You’ll collaborate with Designers, PMs, and Engineers, prototype AI-driven patterns, and ship production-ready UI with strict accessibility and quality checks.

You will help define AI-generated UI standards and build tooling to enforce them, mentor engineers, and raise UX quality across teams in a fast-moving, transparent culture.

Qualifications

• 5+ years in UX engineering, front-end engineering, or design systems at scale.
• Hands-on with design systems, tokens, and reusable components.
• Experience with accessibility (WCAG AA) and inclusive design in production.

Responsibilities

• Design, build, and ship React-based administrative experiences with accessibility and responsiveness built in.
• Define AI-generated UI standards and create tooling to enforce them.
• Mentor engineers, advocate for UX quality, and drive cross-team consistency.
• Prototype with AI-native tools, and ensure usability through testing and iteration.

Skills

UX engineering

Design systems

Design tokens

Reusable components

WCAG AA

Figma

Code review

CI/CD

Communication

Accessibility testing

Tools

React

TypeScript

HTML

CSS

CI/CD tooling

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.

ABOUT THE ROLE

As a Senior UX Engineer, you will design, build, and refine React-based experiences that make complex administrative workflows bullet‑proof. You’ll partner with Designers, Product Managers, and Engineers, and you’ll use AI‑native workflows to prototype within hours and ship to production with quality built in. You will also define the standard that AI-generated UI must meet at Relativity and build the tooling that enforces it. This is a hands‑on technical role with leadership expectations — equally at home in a design critique and a code review: you’ll own the quality bar for your domain, influence how UI is built across the organization, and mentor engineers in UX craft and AI‑native development. If you’re passionate about solving hard problems, designing for scale, and building tools that matter — while working in a culture that values transparency, innovation, and shared success — Relativity offers the opportunity to make a measurable difference in the marketplace.

WHAT YOU’LL DO

Design, build, and ship React-based administrative experiences with usability, accessibility, responsiveness, and consistency built in from the start. Partner with Designers from discovery onward: explore and prototype interaction options, surface technical constraints early, and co‑own the final experience — workflows, edge states, and interaction details — rather than implementing a finished spec. Build high‑fidelity prototypes for usability testing, take part in research sessions, and iterate on what the findings show. Own the interaction details that make data‑dense screens usable: keyboard and focus management, information density, motion and micro‑interactions, microcopy and error messaging, and internationalization. Define the standard AI‑generated UI must meet at Relativity, use agents to prototype patterns in hours rather than sprints, and make compliance automatic through tooling rather than manual review. Measure success in user outcomes — task completion, error rates, and time‑to‑complete on the most‑used administrative workflows — alongside the share of AI‑generated UI that passes compliance gates without manual remediation. Build reusable patterns and components, with clear criteria for promoting them into shared platform use. Mentor engineers, advocate for accessibility and UX quality across teams, and contribute to organization‑wide standards for UX quality, frontend craft, and AI‑native UI development.

WHAT WE’RE LOOKING FOR

Required 5+ years of professional experience in UX engineering, front‑end engineering, or design systems at scale. Hands‑on experience with design systems, design tokens, and reusable component architecture. Working knowledge of WCAG AA and inclusive design, applied in production rather than audited afterward, including assistive‑technology testing (screen readers, keyboard‑only). Fluency in Figma (components, variants, variables) and in keeping design and code libraries in parity, with design tokens as the shared language between designers and code. Experience with modern software development practices, including code review, testing, and CI/CD. Strong product, interaction, and visual judgment, with the ability to explain UX trade‑offs to designers, product managers, and engineers. A passion for making complex workflows feel clear and efficient, not just visually consistent.

Preferred Experience using AI‑native development tools (e.g., GitHub Copilot, Cursor or Claude Code) to prototype, build, or validate UI, including encoding standards for agents through rules, skills, or MCP‑based tooling. Proven ability to build accessible, responsive applications with React, TypeScript, HTML, and CSS, demonstrated by a portfolio or code samples. Experience building the tooling that makes UI standards automatic: design tokens and component manifests that agents consume, and accessibility, lint, and visual‑regression gates in CI. Background in data‑dense, workflow‑heavy enterprise or administrative applications. Track record of mentoring engineers and raising UX quality across teams. Experience in regulated or compliance‑driven environments where accessibility and defensibility matter.

WHY WE COULD BE A GREAT FIT

Impactful Mission Build systems that help customers organize 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 following values: 173 000 and 259 000PLN

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

• Design Systems
• Information Architectures
• Interaction Design
• Prototyping
• Responsive Layout
• User Experience (UX)
• User Experience (UX) Design
• User Research
• Visual Design
• Wireframing

We’re solving big data challenges in the legal tech industry, and we’re always looking for more people to join us on the journey.

At Relativity, you'll learn cross‑functional skills to grow your career and have the chance to make a big impact on our customers, our industry, and our communities.

We admire and value our employees, so it’s no surprise that our hiring process is designed to help us really get to know you — and for you to get to know us, too.