Senior Frontend Engineer (React)

Our requirements

• 8+ years of experience writing production frontend code, with the last 3+ at a senior level in a scale-up/start-up environment.
• Deep React and TypeScript experience, with strong opinions on state management and component architecture.
• Solid web fundamentals: HTML semantics, modern CSS (Grid, Flexbox, container queries), browser rendering pipelines, and the network layer.
• Accessibility expertise as a practitioner skill, capable of spotting WCAG issues during design reviews.
• Fluency in web performance, measuring and optimizing Core Web Vitals on real products.
• High testing maturity (unit, integration, and end-to-end tests).
• Excellent written and spoken English communication skills.
• Bonus points for: Experience with large-scale monorepos, background in logistics/marketplaces/B2B SaaS, contributing to design systems, embedding AI-assisted features, or a working knowledge of Go.

Your responsibilities

• Plan and lead frontend development within your value team, collaborating closely with PMs, designers, and backend engineers.
• Translate designs into production user interfaces that are accessible, performant, well-tested, and consistent with the rest of the product.
• Build prototypes to put working code in front of customers when validating product ideas.
• Own web performance on the surfaces you touch, ensuring excellent Core Web Vitals to boost conversion rates.
• Champion accessibility across the platform (WCAG 2.2 AA is the baseline).
• Contribute to architecture decisions that cross the frontend/backend line, including API boundaries and real-time updates.
• Maintain shared standards across a React/TypeScript monorepo through code reviews and technical councils.
• Mentor junior engineers and contribute to the evolution of the company's design system.

About the project

This is how we organize our work

This is how we work on a project

• architect / technical leader support
• team-level deployment
• documentation
• issue tracking tools
• integration tests
• unit tests

What we offer

• Salary up to 7000 Euro per month
• 100% remote from Poland
• B2B contract signed directly with our Client
• Start ASAP
• Work with a modern tech stack (React, TypeScript, AWS, Snowflake, Figma, Claude Code, etc.)
• A curious, collaborative, low-ego culture within a Great Place to Work certified environment

Benefits

• remote work opportunities
• integration events

OPTIVEUM SPÓŁKA Z OGRANICZONĄ ODPOWIEDZIALNOŚCIĄ