At Okala, we are looking for a Senior Front-End Developer who will take ownership of performance, scalability, and maintainability of our front-end applications. In this role, you will design robust UI architectures, optimize performance at scale, and collaborate closely with cross-functional teams to deliver reliable, production-grade systems. Your work will directly impact user experience, Core Web Vitals, and overall application health.
Responsibilities:
Develop clean, maintainable, and reusable front-end code using modern JavaScript and TypeScript
Architect scalable UI solutions with React.js and Next.js
Collaborate with back-end engineers to integrate APIs and server-side logic
Optimize performance, speed, and scalability under high-traffic conditions
Monitor and improve Core Web Vitals (LCP, CLS, INP/FID) using tools such as Lighthouse and Chrome DevTools
Identify performance bottlenecks and implement sustainable engineering improvements
Leverage observability tools to analyze application behavior in production
Design reusable business logic decoupled from UI components
Contribute to CI/CD workflows and ensure frontend reliability
Stay current with emerging front-end technologies and best practices
Requirements
5+ years of front-end development experience with JavaScript (ES6+) and TypeScript
Strong proficiency in React.js and Next.js
Deep understanding of HTML5, semantic web standards, and cross-browser compatibility
Advanced CSS3 knowledge, including preprocessors (Sass, SCSS, Less) and scalable CSS architectures (OOCSS, ITCSS, etc.)
Experience with Tailwind CSS and UI libraries (Material-UI, Ant Design)
Experience with modern state management solutions (Redux Toolkit, Zustand)
Strong understanding of frontend performance optimization and Core Web Vitals
Experience with observability and logging tools (e.g., Kibana, Elasticsearch)
Knowledge of Service Workers
Experience with unit, integration, and E2E testing (Jest, Cypress, Selenium)
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