Senior Design/Developer

Role - Senior Design/Developer Type - B2B contract / Temporary contract with Adecco Consulting. Payrates - up to 190 PLN net+VAT/h on B2B contract or 22 350 PLN gross/month on Temporary contract Duration - until 31st October 2027 Location - Warsaw Hybrid Experience: 14 + years overall software/product design experience, with 8+ years hands-on React/TypeScript development and a strong UI/UX design portfolio. Job Summary We are seeking a Senior Design/Developer to act as the design and front-end technical lead for client facing Portals. 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 TA Portal 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 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.