Senior Frontend Engineer (Vue.js) - Design System & UX Lead

Mangopay UK Limited; Warszawa; Hybrid; PLN 180,000 - 240,000; Full time

Job summary

Mangopay UK Limited is seeking a Senior Frontend Engineer to help build customer-facing products such as the Dashboard and design system. You will contribute to a cross-functional team, delivering high-quality frontend experiences with Vue.js and React and collaborating with designers to ensure consistency and quality across products.

You will drive CI/CD improvements, monitor production apps, and focus on performance, stability and test coverage to deliver reliable, scalable interfaces for

Qualifications

• 5+ years of experience in developing frontend applications using Vue.js, React or similar frameworks.
• Deep expertise in AI code generation (Claude code, Codex or similar)
• Strong experience in creating design systems and related tooling from scratch
• Strong experience in Frontend application testing, including but not limited to End-to-end and Component testing (Playwright, Cypress or similar), Visual testing (Chromatic or similar)
• Expertise in enhancing CI/CD and deployment pipelines to streamline development processes (TeamCity, Gitlab).
• A passion for code quality and software craftsmanship.

Responsibilities

• Develop and Maintain Frontend Applications: Utilize your expertise in Vue.js as well as React to build and refine our robust frontend applications, ensuring a seamless and engaging user experience.
• Collaborate on Design System: Work closely with our designers to develop Mangopay’s design system, ensuring consistency and quality across all products. Also make sure the Components are well covered and tested (Component and visual tests)
• Enhance CI/CD & Deployment Pipelines: Play a critical role in improving our Continuous Integration/Continuous Deployment pipelines, driving efficiency and reliability in our deployment processes.
• Operate Applications in Production: Ensure the smooth operation of frontend applications in production environments, monitoring performance, troubleshooting issues, and implementing improvements to guarantee high availability and responsiveness.

Skills

Vue.js

React

AI code generation

Design systems

End-to-end testing

CI/CD

Code quality

Tools

Playwright

Cypress

Job description

Mangopay UK Limited is seeking a Senior Frontend Engineer to help build customer-facing products such as the Dashboard and design system. You will contribute to a cross-functional team, delivering high-quality frontend experiences with Vue.js and React and collaborating with designers to ensure consistency and quality across products.

You will drive CI/CD improvements, monitor production apps, and focus on performance, stability and test coverage to deliver reliable, scalable interfaces for