Frontend Engineer

About sigmaworld

• SiGMA World is a global events, media and technology group working across gaming, emerging technology, digital health and affiliate marketing.
• Founded in Malta in 2014, we’ve grown into a team of 450+ people across six global offices in Malta, Cyprus, Serbia, Armenia, Brazil and the Philippines.
• We bring together businesses, entrepreneurs, investors and industry leaders from around the world through our events, media, digital products, education, investment and philanthropic initiatives.
• Today, SiGMA is home to a diverse portfolio of businesses and brands, giving our team the opportunity to work across different industries, markets and projects.
• We’re always looking for talented people who want to grow with us and be part of what we’re building next!
• About the role We're looking for a front-end engineer who owns the experience users actually see: how fast it loads, how it behaves on a mid-range phone, and whether everyone can use it.
• You'll build and scale React applications served globally via CDN for a high-traffic, international audience, working closely with product, design, and back-end teams.
• We want someone who treats performance and accessibility as features rather than afterthoughts, and who thinks about how each component fits the wider system.
• If you notice a layout shift before anyone else does and can't leave it alone, this role is for you.
• Grow with us – Play an important role in SiGMA's continued expansion across markets and help strengthen our presence within the industry.
• International exposure – Work with market leaders and senior industry stakeholders across SiGMA's global network.

Responsibilities

• Build and maintain fast, accessible, responsive web applications with React and TypeScript Contribute to front-end architecture, shared component libraries, and our design system Optimize delivery and performance: CDN and caching strategy, asset optimization, code splitting, and Core Web Vitals Integrate with APIs and back-end services in a cloud-based environment
• Turn designs (Figma) into polished, production-ready interfaces, and push back when designs don't hold up in real use
• Write automated tests and take part in code reviews and CI/CD improvements
• Monitor, debug, and resolve issues in development and production
• Work with QA and product to ship features that are reliable, not just complete
• Requirements 3+ years of professional front-end development, building production-grade web applications

Requirements

• React and TypeScript, including hooks, component design, and rendering performance
• Experience with state management and data fetching (e.g. TanStack Query, Zustand, Redux) Solid modern CSS and responsive, mobile-first development (Tailwind, CSS Modules, or similar) Hands-on performance work: Core Web Vitals, bundle analysis, lazy loading, caching

Experience integrating REST and/or GraphQL APIs in production

• Working knowledge of accessibility standards (WCAG 2.2) and how to test for them Automated testing experience: Vitest or Jest, React Testing Library, and Playwright or Cypress Familiarity with front-end security basics (XSS, CSP, secure token handling)
• Comfortable with Git-based workflows, pull requests, and CI/CD pipelines
• Comfortable working in an AI-assisted workflow (e.g. Claude Code, Copilot, Cursor), with the judgment to review, verify, and take ownership of generated code

Good written and spoken

• Nice to have Deploying front-end applications on AWS (S3, CloudFront), including cache invalidation and CDN strategy js or other SSR/SSG frameworks
• Design systems and Storybook Monitoring and analytics tooling (e.g. Sentry, GA4, GTM) Internationalization for multilingual products
• Experience building SPAs for high-traffic or performance-critical platforms
• Would be beneficial
• Test automation experience with Playwright or Cypress Performance testing basics (Lighthouse, Core Web Vitals, k6 or JMeter) Experience testing WordPress sites, including

Multisite and high-traffic sites

• Understanding of caching layers (Redis, Varnish, CDN) sufficient to reproduce and isolate cache-related issues
• Ability to set up local or test environments with Docker or WP-CLI Familiarity with CI/CD pipelines and how QA fits into release processes
• Experience testing event, ticketing, or payment flows
• Why SiGMA Group?
• (T&Cs apply) Performance rewards – High performers are recognised and provided with opportunities for career progression through annual reviews and bi-yearly performance check-ins.

Benefits

• Free iGaming Academy access – Develop your industry knowledge with access to professional courses and training.
• Travel perks – Attend major gaming events, visit our international offices, and build relationships with industry leaders around the world.