Alfonso Cerrato

ALFONSO CERRATO Senior Frontend Engineer

< About />

I’m a frontend web engineer focused on building high-quality digital products that deliver meaningful results. I specialize in enhancing user experiences and driving measurable business impact through experimentation, A/B testing, and data-driven decision-making.

With a strong background in JavaScript, I primarily work with React to develop scalable and performant web applications.

I enjoy diving deep into product details, refining every interaction to create value for both users and the business.

< Employment History />
Senior Frontend Engineer
Typeform Barcelona, Spain
March 2022 Present

Frontend engineer on Typeform’s Subscriptions team, owning the subscription and checkout UI in React/TypeScript. Drove experiments and UX improvements across plan selection, billing flows, and in-product messaging to lift conversion and reduce churn, while championing accessibility for pricing and plan management experiences.

Frontend Engineer
Typeform Barcelona, Spain
July 2020 February 2022 • 1 y 9 m

Frontend engineer on Typeform’s Site team working across www.typeform.com and shared UI libraries. Led the move to server‑side rendered, zero‑flicker experimentation and SEO‑focused performance, built tooling like to streamline A/B testing, and developed the custom Help Center theme—improving Web Vitals, experiment velocity, and consistency across all public properties.

React Native Developer
PromoQui S.p.A. Naples, Italy
June 2019 May 2020 • 1 y

Mobile hybrid technologies analysis. Creation from scratch of the existing native PromoQui app with React Native. Setup of the navigation system and API services layer based on GraphQL (Apollo Client). Type-checking with TypeScript. State management with Redux, Redux-Saga, and Reselect.

Front-end Web Developer
PromoQui S.p.A. Naples, Italy
July 2017 May 2020 • 2 y 11 m

Analysis, refactoring and development from scratch of React components, as well as developing new features and views as micro apps; state management with React Hooks and Context API.

Components stylization via SCSS modules using the BEM methodology.

Introduced Webpack for the assets bundling process making optimizations like scripts minification, styles auto-prefixing and eventual polyfill scripts injection based on browsers target.

Multi-environment deploys script development that uploads on Amazon S3 front-end bundles; integrated it into the Webpack build process.

Management and integration of advertising slots as well as for analytical tracking events.

Legacy layouts and views maintenance and bug-fixing developed with the Slim template engine.

Web Application Developer
Sawsystem Sarno, Italy
February 2016 December 2016 • 11 m

I contributed to the development of web applications based on AngularJS, dealing with the Front-end development and some subsystems of the Back-end of the CMS/App builder Webdoit. Usage of jQuery components and stylization with Bootstrap and custom CSS.

< Education />
Front-end Web Development
January 2017 January 2018

Learning of Web Development technologies like HTML5, CSS3, JavaScript, SCSS, jQuery and concepts like Responsive Design. Applied those skills on projects visible on my CodePen profile.

Secondary School Diploma in IT
I.T.I. E. Fermi Sarno
2006 2011
< Certifications />
JavaScript Algorithms and Data Structures
January 2019
ES6, data structures, debugging, regular expression, algorithm scripting, OOP, functional programming.
< Main Technical Skills />
HTML CSS/SCSS Javascript ReactJS NextJS styled-components A/B testing Growth Engineering
< Soft Skills />
Curiosity Team work Knowledge sharing Adaptability Attention to detail Problem solving Innovative
< Personal info />

Madrid, Spain

01/06/1992

E-mail

GitHub

LinkedIn

< Languages />
Native language
Italian
Other languages
English (professional working proficiency)
Spanish (limited working proficiency)