Senior Software Engineer - Frontend (IGT1 Lanka: Sitecore)

About IGT1 Lanka 

IGT1 Lanka is a rapidly growing offshore technology and talent solutions company based in Port City Colombo. We are a fully owned subsidiary of IGT I Holdings Sweden AB, funded by the three of world’s leading private equity firms; EQT Group, Hg, and TA Associates. We’re also proud to be a sister company of IFS, Sri Lanka’s largest and most established technology company. 

At IGT1 Lanka, we partner with global businesses to scale operations, accelerate innovation, and build world-class SaaS platforms through high-quality offshore delivery. Our people-first culture champions diversity, teamwork, and continuous learning, creating an environment where talent thrives. 

With a team of over 400 professionals and counting, we are always looking for passionate, skilled individuals who want to make a global impact while being part of something extraordinary. 

Through our offshore collaboration model, you'll be embedded within the team of one of our esteemed international clients, contributing directly to high-impact, enterprise-level initiatives. 

About the client: Sitecore 

Sitecore delivers a composable digital experience platform that empowers the world’s smartest and largest brands to build lifelong relationships with their customers. A highly decorated industry leader, Sitecore is the leading company bringing together content, commerce, and data into one connected platform that delivers millions of digital experiences every day. Thousands of blue-chip companies including American Express, Porsche, Starbucks, L’Oréal, and Volvo Cars rely on Sitecore to provide more engaging, personalized experiences for their customers.

About the role:

We are seeking a highly experienced and technically skilled Senior Front-End Engineer to join Sitecore's new technology hub in Sri Lanka. The ideal candidate is a technical expert with a passion for solving complex problems and writing high-quality software solutions. You will be expected to take on significant technical challenges, owning major features and influencing key architectural decisions while helping to elevate the skills of the engineers around you.

Key responsibilities:

• Own the solution design and implementation of large-scale, complex front-end features from start to finish.
• Elevate the team's technical abilities through exemplary code, thoughtful and constructive code reviews, informal mentorship, and hands-on guidance on configuring and optimizing build tools (Vite, Webpack, Rollup).
• Lead key technical decisions across state management, performance optimization, and front-end architecture, ensuring scalable and maintainable solutions.
• Collaborate closely with cross-functional teams (Design, Product, Backend, QA) to shape cohesive, high-quality features and influence product direction.
• Write clean, type-safe TypeScript code aligned with recognized best practices (DRY, SOLID).

Preferred Skills and Experience:

• Bachelor's degree in Computer Science, Engineering, or equivalent practical experience.
• 5+ years of professional software development experience, including 3+ years of deep, hands-on React work.
• Expert-level proficiency in JavaScript/TypeScript, HTML5, and CSS3.
• Strong experience with modern build tools, including Vite, Webpack, and Rollup (configuration, optimization, plugin ecosystems).
• Deep understanding of state management strategies and tooling (React Query, Jotai, React Context).
• Experience integrating REST APIs and working with code generation tools such as OpenAPI/Swagger.
• Mastery of modern React patterns: functional components with hooks, custom hooks, component composition, React Server Components, and performance optimization techniques
• Strong CSS architecture and implementation skills, including Flexbox, Grid, Container Queries, and experience with CSS-in-JS or utility frameworks (TailwindCSS preferred).
• Understanding of UI/UX principles and a passion for creating thoughtful, user-centered experiences.
• Solid understanding of Core Web Vitals and front-end performance optimization.
• Strong problem-solving, communication, and collaboration skills.

Nice to have:

• Test-driven development (TDD) experience and mindset.
• Experience with MCP (Model Context Protocol) integration.
• Experience with Next.js, Remix, or other modern React frameworks.
• Monorepo tooling experience (Turborepo, Nx, Lerna).
• Strong understanding of web security fundamentals (XSS, CSRF, CSP).
• Accessibility knowledge (WCAG 2.1 AA standards)
• Experience with REST API code generation tools (OpenAPI, Swagger Codegen)
• Advanced experience with GitHub Actions, such as creating custom actions or complex, multi-stage workflows
• Experience with Agile/Scrum methodologies
• Experience designing or developing agentic UI experiences, where the interface proactively assists the user

Core technologies we use:

• React, TypeScript, JavaScript (ES6+)
• Vite for development, Webpack/Rollup for more complex builds
• React Query, Jotai, React Context for state management
• TailwindCSS and CSS Modules
• Vitest, React Testing Library, Playwright
• GitHub Actions, Docker
• Turborepo with pnpm workspaces
• REST APIs with OpenAPI/Swagger code generation

What matters to us:

• Simplicity over cleverness - complexity should come from the problem, not the solution
• Readability first - we spend more time reading code than writing it
• Well-tested and maintainable - code should be easy for anyone on the team to understand and modify
• Functional and declarative patterns over imperative code
• Type safety - comprehensive TypeScript usage
• Component-driven development with clear separation of concerns
• Testing ownership -- no feature is complete without tests
• Code ownership - if you write it, you maintain it and take responsibility for its quality

We embrace flexibility and hybrid work opportunities to support diverse needs and lifestyles, while also valuing inclusive workplace experiences. By fostering a sense of community, we drive innovation, strengthen connections, and nurture belonging. Our commitment ensures you can work in a way that suits you best, while also engaging with colleagues to share ideas and build meaningful relationships. #Li-Hybrid