William Mays

Senior Front-End Engineer

+447833221113mayswill3@hotmail.co.ukLinkedInLondon, UK

Summary

Senior Front-End Engineer with 10+ years of experience across all stages of the development cycle for dynamic web projects. Skilled in React, Next.js, TypeScript, and React Native, with a strong background in agile methodologies. Currently building products as a solo founder — including an AI-powered prediction market and a dating app with 1,000+ users. Passionate about turning ideas into fast, accessible, well-crafted products.

Experience

Founder & Lead Developer

Self-Employed2024 — PresentLondon, UK

Building products as a solo founder and taking on freelance frontend projects:

  • Built Eroteme (eroteme.io): an AI-powered prediction market on Polygon where five AI models analyse every market, with peer-to-peer USDC settlement and smart contract architecture.
  • Built Pop the Balloon (poptheballoonapp.com): a dating app for iOS and Android with 1,000+ active users, featuring real-time matching, AI-powered conversation summaries, and a unique interaction mechanic.
  • Designed and developed Bunnies on the Green (bunniesonthegreen.co.uk): a full website for a Montessori-influenced day nursery in London, featuring gallery, admissions, and Ofsted integration.
  • Designed and developed Born 4 Sport (born4sport.co.uk): a mobile-first website for a sports coaching brand showcasing coaching programmes.

React Developer

Anglia Ruskin UniversityJan 2025 — Apr 2025Chelmsford, UK
  • Contracted via Real Staffing to build wireframes for the EE process dashboard, resolve bugs in the EE workflow, ensure UI consistency with existing design standards, and deliver incremental sprint-based development. Also trained internal staff on React.

Senior Frontend Engineer

Landworth2024 — 2024London, UK
  • Developing and maintaining responsive web interfaces, enhancing user experience through modern frontend technologies.

Senior Frontend Engineer

University of East Anglia2022 — 2024Norwich, UK
  • Led the development of the 'Course Catalogue' system, streamlining course creation and student application processes for over 10,000 students. Reduced application processing time by 30%.

Senior Frontend Engineer

Nimbletank2022 — 2022London, UK
  • Developed an advertising platform for NatWest that connects customers with business experts across a range of topics, providing valuable insights and personalised guidance.

Senior Frontend Engineer

Future Platforms2021 — 2022London, UK
  • Led the integration of Garashield Ltd's digital garage platform, migrating pages to a modern framework with a 25% improvement in user interaction. Also worked on aligning systems for EE's merger with BT.

Senior Frontend Engineer

Entain2018 — 2020London, UK
  • Spearheaded the upgrade of a 20-year-old till system to a modern real-time application for handling bets and payouts. Developed multiple internal real-time applications.

Senior Frontend Engineer

Oliver Wyman2017 — 2018London, UK
  • Worked on Enercity (gas & electric company, Angular 2), Oliver Wyman's main site (KO.js), and Credit Studio (banking app).

Frontend Engineer

The White Company2015 — 2017London, UK
  • Key role in the implementation and launch of the Hybris ecommerce CMS platform. Managed BAU content updates across multiple devices.

Junior Frontend Developer / QA Tester

Hogarth Worldwide2014 — 2014London, UK
  • Developed and tested pages for clients including Betfair, Santander, and Pfizer. Combined QA Tester and Front-End Developer role.

Education

Bachelor of Science in Computer Science

University of Hertfordshire2014Hatfield, UK

Strengths

Product Building

Proven ability to take products from zero to launch as a solo founder, handling architecture, development, and deployment end-to-end.

System Modernization

Ability to upgrade and modernize legacy systems, ensuring seamless transitions to contemporary frameworks.

Operational Efficiency

Proven track record of developing solutions that significantly enhance operational efficiency, such as real-time applications and internal tools.

Team Collaboration

Experience working with cross-functional teams to align systems and processes, highlighting strong collaborative and integration skills.

Skills

ReactNext.jsTypeScriptJavaScriptReact NativeNode.jsTailwind CSSHTMLCSSSassReduxGraphQLSoliditySupabaseGitResponsive DesignAgile / Scrum

Certification

BCS, The Chartered Institute for IT

Passions

Enjoy building apps and products, with interests spanning AI, Web3, and the financial sector. Qualified boxing trainer. Always eager to learn new technologies and techniques.