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Hannah van den Wijngaard

@hannahvandenwijngaar

Senior software developer at Eurostar who improved group booking sales by 33% and shaped accessible design system components.

United Kingdom

Message

At Eurostar, I led delivery of online group bookings and Saved Basket for the web booking platform. Group booking sales in the 1–15 passenger bracket rose by 33% after A/B testing, and Saved Basket reached a conversion rate of around 40%.

I co-owned Eurostar’s internal design system, defining composable, accessible component APIs adopted across 9 product teams. I also redesigned how group fare terms and conditions appeared in the booking flow, reducing complaints by 40%.

Earlier, at Mendeley, I designed a DynamoDB cache that cut server-side CPU utilisation by 39.4%, and advocated for WCAG 2.1 AA accessibility. I’ve also worked on ticketing and CRM software at Spektrix and coached developers at Codebar.

Experience

Work history, roles, and key accomplishments

Senior Software Developer

Eurostar

Dec 2024 - Sep 2026 (1 year 9 months)

Led technical delivery of online group bookings and Saved Basket for a high-traffic booking platform, improving conversion and reducing complaints. Co-owned the internal design system and mentored junior engineers.

React TypeScript React Native Redux REST GraphQL Jest React Testing Library Cypress styled components Storybook GitHub Co Pilot New Relic DynamoDB Lambda A B Testing CI CD Accessibility

Software Engineer

Spektrix

Dec 2023 - Dec 2024 (1 year)

Re-architected basket logic by extracting legacy C# code into a microservice. Ran accessibility workshops and worked in a TDD and pairing-first environment.

C#Microservices Test Driven Development Accessibility Pair Programming

Front-end Engineer

AllBright Collective

Aug 2023 - Dec 2023 (4 months)

Built React components using hooks and Next.js server-side components, and created type-safe clients. Built a Slack integration to streamline code reviews and mentored junior engineers.

React Next.js TypeScript Slack API Mentorship

Software Engineer

Mendeley

May 2021 - Aug 2023 (2 years 3 months)

Integrated Mendeley APIs and Redux state management to persist user data. Cut server-side CPU utilisation by 39.4% with a DynamoDB cache and advocated for accessibility.

React Redux DynamoDB New Relic UML Accessibility WCAG 2.1

Photography, Rights and Reproduction Manager

Victoria Miro

Aug 2014 - May 2021 (6 years 9 months)

Acted as digital support for artists and colleagues and project managed the gallery's first online sales portal, including an integrated XR platform, working closely with developers.

Project Management Digital Support 元宇宙 XR教育

Archivist

White Cube

Managed archival processes and provided technical support, learning technical details quickly and explaining them clearly to non-technical colleagues.

Archiving Technical Support Communication Skills