About Us:

At Sitecore, our mission is to simplify how brands reach, engage, and serve people by delivering intelligent, personalised digital experiences that connect the world. We empower the world’s most iconic brands to build lifelong relationships with their customers—seamlessly, smartly, and at scale.

As the leading provider of agentic digital experience software, Sitecore brings together content, commerce, and data into one composable platform that enables brands to deliver millions of meaningful, adaptive experiences every day. Trusted by global leaders such as American Express, Porsche, Starbucks, and L’Oréal, Sitecore helps brands transform engagement through experiences that are not only personalised but predictive and dynamic.

Our foundation is our people—a diverse, passionate, and collaborative global team spanning over 25 countries. We believe that every experience matters, and that belief starts with how we work together. Our values guide how we lead, innovate, and connect. They are the behaviours that bring our mission and vision to life, every day, in every interaction.

As we continue to evolve, we are actively cultivating AI skills across our teams to unlock new levels of creativity, efficiency, and insight. From engineering to customer experience, AI capabilities are becoming integral to how we design, build, and deliver the next generation of digital experiences.

Learn more at Sitecore.com.

About the Role:

We are seeking a highly skilled Senior Front-End Engineer to join our technology hub in Dublin. The ideal candidate has deep expertise in React, strong problem-solving skills, and experience leveraging AI tools to build intelligent user experiences. You will own major features, influence architectural decisions, and mentor engineers while integrating AI capabilities into our platform.

What You’ll Do:

Design and implement large-scale front-end features, including AI-powered interfaces and LLM integrations with streaming responses.
Lead technical decisions on architecture, state management, performance optimisation, and AI integration patterns.
Mentor team members through code reviews, pair programming, and guidance on build tools and AI development workflows.
Collaborate with cross-functional teams (Design, Product, Backend, ML/AI, QA) to deliver high-quality features.
Write clean, type-safe TypeScript code following best practices while utilising AI assistants for productivity.

Core Technologies

React, TypeScript, JavaScript (ES6+), Vite/Webpack/Rollup
Claude API, OpenAI API, AI development tools (GitHub Copilot, Cursor, Claude Code)
React Query, Jotai, React Context, TailwindCSS, CSS Modules
Vitest, React Testing Library, Playwright, GitHub Actions, Docker
Turborepo with pnpm, REST APIs with OpenAPI/Swagger

What You Need to Succeed:

5+ years of professional development experience, including 3+ years of deep React expertise
Proven experience using AI development tools (GitHub Copilot, Cursor, Claude) and integrating LLM APIs into web applications
Expert proficiency in JavaScript/TypeScript, HTML5, CSS3, and modern React patterns (hooks, composition, Server Components)
Strong experience with build tools (Vite, Webpack, Rollup, Bun) and state management (React Context, TanStack React Query)
Experience with REST APIs, OpenAPI/Swagger, and modern CSS (Flexbox, Grid, TailwindCSS preferred)
Understanding of UI/UX principles, Core Web Vitals, performance optimization, and conversational interface design
Strong problem-solving, communication, and collaboration skills.

What Matters to Us

Simplicity over cleverness - AI tools should enhance, not complicate.
Readability and maintainability - code should be clear and well-tested.
Functional patterns, type safety, and component-driven development.
Code ownership - if you write it, you maintain it and ensure quality.
Thoughtful AI integration that genuinely improves user experience.

Additional Skills That Could Set You Apart:

Experience with MCP (Model Context Protocol), prompt engineering, RAG patterns, or vector search.
Next.js, Remix, or modern React frameworks with streaming capabilities.
Testing experience, monorepo tools (Turborepo, Nx), web security fundamentals, and accessibility knowledge (WCAG 2.1).
Experience with GitHub Actions, Agile/Scrum, or designing agentic UI experiences.

Why You Should Click ‘Apply’:

Sales and Customer Success are the key to our success! We are tapping into an exciting $30B market opportunity that is still very much in its infancy and feel it’s never been a better time to join Sitecore as we look to grow by 30% YoY. Growth for us means growth for you and your career.
Great team and company culture! You can find out more about our company culture in the Sales and Customer Success team and our commitment to creating a diverse and inclusive workplace, on our YouTube Channel. Thanks to the work of every employee globally, Sitecore has been recognised for award-winning Culture by Comparably.

Equal Opportunities at Sitecore

Sitecore is proud to be an equal opportunity workplace. We are committed to equal employment opportunity without unlawful regard to race, colour, ancestry, religion, gender, national origin, sexual orientation, age, citizenship, marital status, disability, veteran status or any other local legally protected characteristic.

Senior Front End Engineer

Job Description