Senior Frontend Developer / Tech Lead

Uvation, Inc.; Polska; In loco; PLN 180.000 - 280.000; Tempo pieno

Descrizione del lavoro

Uvation, Inc. seeks an experienced front-end lead to own the architectural direction of complex React/Next.js features. You will mentor, review designs, and shape scalable front-end systems with a focus on performance, accessibility and robust data integration.

The role demands extensive expertise with UI libraries, state management, and modern testing strategies. You will collaborate with back-end teams, drive contracts, and guide CI/CD practices for high-quality deliverables.

Competenze

• Advanced experience with React, Next.js, TS, and modern hooks-based components.
• Design scalable frontend architecture with single source of truth and clear boundaries.
• Experience building reusable component libraries and API governance.
• Deep experience with Zustand/Redux Toolkit or equivalents.
• Strong HTML/CSS/SCSS with responsive design and accessibility.
• Experience implementing designs from visual specs using Carbon or Material UI.
• Strong REST API integration with typed models and data handling.
• Defining or validating API contracts with backend teams.
• Performance profiling, memoisation, code splitting, lazy loading.
• Awareness of frame rate, GPU usage for graphics-heavy screens.
• Hands-on WebGL/three.js/React Three Fiber with animation timelines.
• Managing events across layered UI and graphics surfaces.
• Integrating map SDKs with token management and coordinate systems.
• Isolated styles, clean props/callbacks, no global side effects.
• Testing with Vitest/Jest and React Testing Library.
• Strict TypeScript, cross-browser testing and DevTools.
• Contributions to CI/CD, Git workflows and PR reviews.
• Experience with Azure DevOps.
• Technical leadership through mentoring and documentation.
• Front-end security fundamentals.

Conoscenze

React

Next.js

TypeScript

Hooks-based components

Front-end architecture

State management (Zustand/Redux)

UI design systems (Carbon/Material UI)

REST API integration

API contracts testing

Performance optimization

WebGL/three.js

Graphics & interactive visuals

Testing (Vitest/Jest)

CI/CD / Git workflows

Azure DevOps

Security basics

Code splitting / memoisation

Cross-browser testing

Descrizione del lavoro

Job Overview

React, Next.js, architecture and interactive graphics | 5 to 8 years

This role owns technical direction for complex front-end features and supports the team through design decisions, reviews and mentoring. The successful candidate should combine strong React and Next.js engineering with architecture, performance and integration expertise.

Must Have Skills

• Advanced experience with React, Next.js, TypeScript and modern hooks-based component design.
• Ability to design scalable front-end architecture with a single source of truth and clear boundaries between UI, business logic and data access.
• Experience designing reusable component libraries and governing consistent component APIs.
• Deep experience with Zustand, Redux Toolkit or an equivalent state-management approach, including efficient selector design.
• Strong HTML, CSS and SCSS skills, including responsive design, accessibility and style isolation.
• Experience implementing interfaces from detailed visual specifications and using design systems such as IBM Carbon or Material UI.
• Strong REST API integration experience, including typed models, adapters, polling and defensive handling of missing or inconsistent data.
• Experience defining or validating API contracts with backend teams and applying contract-testing principles.
• Demonstrated performance expertise, including profiling, memoisation, code splitting, lazy loading and bundle analysis.
• Awareness of frame rate, GPU utilisation and memory behaviour on graphics-heavy screens.
• Hands‑on experience with WebGL, three.js or React Three Fiber, including scene and camera control, pointer picking and animation timelines.
• Experience managing events and interaction across layered UI and graphics surfaces.
• Experience integrating map SDKs, handling coordinate systems, implementing provider fallbacks and managing API tokens safely.
• Ability to build components that integrate into an existing host application through clean props and callbacks, isolated styles and no unintended global side effects.
• Strong testing experience with Vitest or Jest and React Testing Library, supported by a practical test strategy.
• Experience with strict TypeScript, error boundaries, cross-browser testing and browser DevTools.
• Experience contributing to CI/CD pipelines, Git workflows and high-quality pull-request reviews.
• Experience with Azure DevOps
• Proven technical leadership through mentoring, task breakdown, estimation and technical documentation.
• Understanding of front-end security fundamentals, including secure environment configuration, safe logging and responsible third-party dependency use.

Good to Have Skills

• Experience with advanced animation libraries such as GSAP or Framer Motion.
• Experience with charting and data‑visualisation libraries.
• Experience with visual regression testing or end-to-end testing using Playwright
• Experience with internationalisation and localisation at scale.
• Familiarity with micro-frontends, monorepos or design-system governance.
• Experience with production observability, release support and incident investigation.
• Experience leading technical discovery or proof-of-concept work for complex interactions.