We are looking for a Front-End Developer (React / React Native) for a 6 Month Contract based in North Sydney (2 days a week in the office). We’re looking for a highly skilled Front-End Developer with deep experience across React and React Native to join a major design system uplift and component modernization program. This is a 6-month contract based in Sydney, working closely with UX, Product, and Engineering teams to improve consistency, performance, and scalability across web and mobile platforms. The client is a leader in their field and looking for someone to help define their mobile space. 

What You’ll Be Doing Platform & Design System Work

• Audit and analyse existing React/React Native components.
• Identify duplication, anti-patterns, styling drift, and coupling issues.
• Benchmark performance (Lighthouse, Web Vitals, React Profiler, RN perf tools) and accessibility (axe).
• Ensure full parity between Figma and code (tokens, variants, states).
• Participate in design–dev reviews and provide technical feasibility insights.
• Clarify component behaviour, props, interactions, and edge cases.

Refactor & Build

• Refactor components into modular, composable, typed structures (TypeScript).
• Implement/strengthen design tokens and theming (light/dark modes, brand variants).
• Build comprehensive Storybook stories that reflect all Figma states/variants.
• Replace legacy styling with modern CSS-in-JS or utility-first patterns.
• Ensure visual and behavioural consistency across web and React Native.

Testing & Quality

• Add unit/integration tests using Jest, React Testing Library, Cypress.
• Use Storybook for visual regression and design reviews.
• Integrate linting, formatting, and type checks into CI (ESLint, Prettier, TypeScript).

Accessibility & Internationalisation

• Ensure ARIA correctness, keyboard navigation, semantic structure.
• Validate screen reader and gesture support on mobile.
• Ensure WCAG 2.1 AA compliance across all components.

Documentation & Enablement

• Document components and patterns in Storybook/Docs.
• Create contribution guidelines, coding standards, and migration notes.
• Partner closely with UX/Product on specs and acceptance criteria.

What You Bring

• 5+ years experience building UI with React and React Native (iOS + Android).
• Strong proficiency with React 18+, TypeScript, ES6+.
• Skilled with modern component architecture, hooks, context, and state management (Redux, Zustand, Recoil).
• Advanced CSS expertise: Flexbox, Grid, custom properties, selectors.
• Experience with Styled-JSX (highly advantageous).
• Confident configuring Webpack (via react-app-rewired), Babel, Sass/CSS preprocessors.
• Expert-level SASS (mixins, variables, modular architecture).
• Strong design system experience — tokens, component specs, Figma collaboration.
• Storybook (web) and Expo/Storybook (RN).
• Testing experience with Jest, React Testing Library, Detox.
• Accessibility best practices (WCAG 2.1 AA).
• Performance profiling/optimisation for both web and RN.
• Comfortable with CI/CD (Bitbucket/GitHub/GitLab), branching strategies, code reviews.
• Strong communication and documentation skills — able to clearly explain complex UI concepts.
• Comfortable collaborating in Figma, Miro, Confluence.

If interested please apply or email chouston@siriustechnology.com.au