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Product-focused front-end engineer shipping large-scale consumer experiences to millions of users. Starts with user needs and problems, builds scalable design systems, integrates AI into engineering workflows, and drives performance with React, TypeScript & Next.js. Proven impact in highly competitive technical markets: aligned design and engineering with atomic component systems, improved engagement and stability at scale, and used observability and experimentation to deliver faster iteration and measurable growth.…Product-focused front-end engineer shipping large-scale consumer experiences to millions of users. Starts with user needs and problems, builds scalable design systems, integrates AI into engineering workflows, and drives performance with React, TypeScript & Next.js. Proven impact in highly competitive technical markets: aligned design and engineering with atomic component systems, improved engagement and stability at scale, and used observability and experimentation to deliver faster iteration and measurable growth.

Ciaran McCullough

Front-End Developer, Software Engineer, Game Developer, +2

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Product-focused front-end engineer shipping large-scale consumer experiences to millions of users. Starts with user needs and problems, builds scalable design systems, integrates AI into engineering workflows, and drives performance with React, TypeScript & Next.js. Proven impact in highly competitive technical markets: aligned design and engineering with atomic component systems, improved engagement and stability at scale, and used observability and experimentation to deliver faster iteration and measurable growth.…Product-focused front-end engineer shipping large-scale consumer experiences to millions of users. Starts with user needs and problems, builds scalable design systems, integrates AI into engineering workflows, and drives performance with React, TypeScript & Next.js. Proven impact in highly competitive technical markets: aligned design and engineering with atomic component systems, improved engagement and stability at scale, and used observability and experimentation to deliver faster iteration and measurable growth.

Available to hire

Product-focused front-end engineer shipping large-scale consumer experiences to millions of users. Starts with user needs and problems, builds scalable design systems, integrates AI into engineering workflows, and drives performance with React, TypeScript & Next.js.

Proven impact in highly competitive technical markets: aligned design and engineering with atomic component systems, improved engagement and stability at scale, and used observability and experimentation to deliver faster iteration and measurable growth.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

German

Beginner

Work Experience

Software Engineer at Electronic Arts

September 1, 2021 - Present

Connected EA racing games into one platform and built EA Racenet using React and React Native. Racenet reached 5.3M users and 400K+ peak monthly active users. Aligned design and engineering on Racenet by building a reusable component system in Storybook, improving UX consistency and iteration speed. Increased developer velocity by building front-end architecture and state management with Context, growing average monthly active users from 40K to 420K. Maintained stability through growth with observability (Firebase Crashlytics and Sentry), delivering 99.8% crash-free sessions. Led client-side development across client, backend and in-game integration for custom cross-platform racing leagues (F1 League Racing). Built a telemetry visualization tool with Three.js and Chart.js. Built the EA Sports App in Kotlin with Jetpack Compose on MVVM/MVI and clean architecture. Improved app launch time from 8s to 0.8s (10x), raised onboarding reach from 53% to 85%, and homepage reach from 24% to 54

Front End Web Developer (Contract) at Codemasters

March 1, 2021 - September 30, 2021

Built and maintained websites for Codemasters brands with a focus on accessibility (WCAG), SEO, and modern web technologies. Developed a responsive React/Next.js template for the Formula One site using Tailwind CSS, pulling content from a headless WordPress CMS over GraphQL, and validated across browsers with LambdaTest. Improved company website navigation and accessibility. Built parts in WordPress with Advanced Custom Fields (ACF) and vanilla JavaScript. Shipped downloadable DLC packs and themes via Kontent.ai. Managed legacy systems with security updates, dependency management, and WordPress migrations; redesigned forum and blog to improve engagement and accessibility.

Web Developer at Freelance

July 1, 2020 - March 31, 2021

Delivered responsive web applications for clients using modern JavaScript, HTML and CSS. Converted Figma designs into responsive React components for a SaaS client and cleared UI issues tracked in Jira. Built single-page commercial websites with vanilla HTML/CSS/JavaScript with clean, performant, device-responsive implementations.

Digital Lead/Administrator at Lab 39

March 1, 2016 - March 31, 2021

Led digital transformation and operations for a dental laboratory across web development and digital marketing, and managed GDPR compliance. Took responsibility for operational digital administration and associated technology workflows.