Senior Design Engineer – React/TypeScript

  •  Reference Number: 29553
  •  Job Published: 01 October 2026
  •  Form of employment: Contract
  •  Apply by: 26 November 2026

Job Description

We are seeking a Senior Design/Developer to act as the design and front-end technical lead. This is a hybrid role combining UX ownership (requirements-to-prototype, design system governance) with hands-on senior front-end engineering leadership. The ideal candidate translates ambiguous business requirements into validated, high-fidelity prototypes, then leads (and codes alongside) the mid-level development team to deliver pixel-accurate, accessible, enterprise-grade portal experiences.

Key Responsibilities

  • Own the requirements-to-prototype pipeline: run discovery with business/product stakeholders, produce wireframes, interactive prototypes, and high-fidelity designs.
  • Define and enforce UI/UX standards, interaction patterns, and design system usage across all  applications.
  • Architect and build key React/TypeScript front-end components and shared UI libraries, setting technical and design precedent for the team.
  • Review pull requests and provide constructive, actionable feedback to mid-level developers on both design fidelity and code quality.
  • Partner with backend/API teams to ensure front-end designs are technically feasible within service and data constraints.
  • Drive accessibility compliance (WCAG 2.1 AA) and responsive design across all portal screens.
  • Conduct usability testing/validation sessions and iterate designs based on user feedback and analytics.
  • Mentor mid-level UI/UX developers on both design thinking and React best practices.
  • Participate in architecture/design governance reviews as design owner for the portal.
Required Skills
  • Expert-level proficiency in design/prototyping tools (e.g., Figma), including component libraries and design systems.
  • Strong hands-on (14 yrs) React.js + TypeScript development experience (component architecture, state management, hooks).
  • Demonstrated experience translating designs into production-quality, responsive, accessible UI.
  • Familiarity with containerized application environments (Docker/Kubernetes/OpenShift) and modern CI/CD pipelines.
  • Strong stakeholder management - comfortable defending design decisions to both business and engineering audiences.
  • Experience reviewing code and providing technical/design feedback within a team setting.
Nice-to-Have
  • Working knowledge of Java or .NET (for backend collaboration/awareness - not a core build requirement).
  • Experience with Micro Frontend architectures (Module Federation, single-spa).
  • Basic SQL/database knowledge.
  • Prior experience in financial services, fund administration, or transfer agency platforms.

Company Description

Experis to światowy lider rekrutacji specjalistów i kadry zarządzającej w kluczowych obszarach IT. Z nami znajdziesz konkurencyjne oferty zatrudnienia oraz ciekawe projekty IT skierowane zarówno do ekspertów z wieloletnim doświadczeniem, jak i osób, które dopiero zaczynają swoją przygodę w branży IT.

We offer recruitment of managers and highly qualified consultants with expertise in IT.Experis is part of ManpowerGroup and has been named one of the world's most ethical companies.
Warszawa, Mazowieckie
The employment agency - Certificate No. 412