Rachelle Ragasa

Senior Frontend Engineer with 10 years of experience building production web applications, most recently in regulated healthtech at Cera, where I owned frontend delivery for medication management and AI-integrated features from discovery through production monitoring. I specialize in React, TypeScript, accessible component development, and design systems, partnering with product and design to ship reliable frontend experiences with feature flags, pilot releases, and data-informed iteration.

Senior Frontend Engineer at Cera (2021-11 – 2026-04)

• Owned frontend delivery for Cera's medication management module in a regulated healthtech environment, taking work from discovery through production monitoring.
• Led the concept-to-production delivery of an AI-integrated page by surfacing user pain points, assessing business impact, and partnering with product and design to ship the feature.
• Used feature flags and pilot releases to de-risk rollout with real users, and monitored production health in Sentry to catch regressions early.
• Integrated Heap Analytics and strengthened event tracking so product decisions were based on consistent, reliable data.
• Translated Figma designs into accessible, reusable components; enforced WCAG standards via eslint-a11y; and contributed to a shared component library and design system in Storybook within a monorepo.

Frontend Developer at Costa Coffee (2019-11 – 2021-02)

• Built reusable, responsive Contentful components within a JAMStack architecture, helping accelerate website delivery across multiple international markets.
• Championed accessibility by running WCAG upskilling sessions for the team and embedding a11y earlier in the design process instead of retrofitting it later.
• Implemented i18n across international market websites, supporting consistent and localised user experiences.

Frontend Developer at Whitbread (2017-10 – 2019-10)

• Contributed to the Premierinn.com booking flow during an AngularJS-to-React migration, shipping new React features while keeping existing components stable in a complex AEM environment.
• A/B tested multiple booking journey configurations to improve conversion and guide UX decisions with data-driven insights.

Early Career Frontend Developer at AND Digital (2015-08 – 2017-10)

• Delivered web applications across client projects, turning business requirements into production-ready frontend features.
• Built a strong foundation in frontend engineering, Agile delivery, and collaborating with client stakeholders.

BSc in Computer Science with Professional Practice – Brunel University of London (2011)