Frontend Engineer

Job Title: Frontend Engineer
Location: Armenia/Serbia
Employment Type: Full-time
About SiGMA World
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.
Key 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
Strong 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 English
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
Why SiGMA Group?
Grow with us – Play an important role in SiGMA's continued expansion across Latin America and help strengthen our presence within the land-based gaming industry.
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.
Performance rewards – High performers are recognised and provided with opportunities for career progression through annual reviews and bi-yearly performance check-ins.
International exposure – Work with leading casino operators, gaming companies and senior industry stakeholders across LATAM and SiGMA's wider global network.

Employment type
Full-Time

Work arrangement
No