Paul Rayner, Developer in Chester, United Kingdom
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Paul Rayner

Verified Expert  in Engineering

Front-end Developer

Chester, United Kingdom
Toptal Member Since
September 6, 2022

A thoughtful and competent professional, Paul is a full-stack developer specializing in front-end development and React. He has a keen eye for design and enjoys optimizing the UI to delight users. Paul's broad-reaching experience includes health coaching, search engine optimization, marketing, public speaking, and copywriting. He started freelancing for the variety of work it brings and for the opportunity to be part of exciting and challenging projects.


The Detective Society
React, Amazon Web Services (AWS), CSS, HTML
React, JavaScript, CSS, HTML, Responsive Web Apps, React Native, TypeScript...
Nice Pak International
C#, Ember.js, Angular, .NET, SQL, APIs, Git, REST APIs, Software Development




Preferred Environment

MacOS, Visual Studio Code (VS Code), React

The most amazing...

...thing I've worked on as a front-end developer was a high-traffic gym booking software, which is being used by millions of users each month.

Work Experience

React Developer

2022 - 2022
The Detective Society
  • Updated the design and function of the old chat app, which was part of a puzzle game.
  • Fixed existing bugs in the app to improve user experience.
  • Designed the app to look and feel more like a chat app.
  • Set up an API gateway in AWS to trigger an existing lambda.
Technologies: React, Amazon Web Services (AWS), CSS, HTML

Front-end Developer

2020 - 2022
  • Worked as a primary React developer on the team developing customer-facing apps.
  • Created and coded an online joining app where users could sign up and buy new memberships.
  • Worked on customer-facing apps with a high traffic volume in the hundreds of thousands of bookings per day.
  • Built an interactive venue map finder using Mapbox, enabling users to search for gyms and venues in the UK with an accompanying results list.
  • Created a new activity-type app where users could buy multiple tickets for an activity, such as swimming.
Technologies: React, JavaScript, CSS, HTML, Responsive Web Apps, React Native, TypeScript, Front-end, Single-page Applications (SPA), User Experience (UX), User Interface (UI), Enterprise Systems, HTML5, Redux, Figma, CSS3, Jest, Git, Unit Testing, Redux RTK, MUI (Material UI), Jira, Scrum, Software Development, Storybook, Mapbox, Front-end Development, Relational Databases, Test-driven Development (TDD), Responsive UI, React Redux, SaaS

Software Developer

2019 - 2020
Nice Pak International
  • Created a full-stack tidy workspace app for employees called Kondo. It would automatically assign office areas for employees to tidy each week. Users also got an area assigned to them that they would rate.
  • Rebuilt a production wallboard app's live dashboard that displayed manufacturing lines and their current status, e.g., product on the line, quantity, etc. Refactored from VB to Angular and C#.
  • Worked alongside colleagues on a new app to allow product managers to create products from scratch using materials the company has, like liquid or paper. Provided full stack work using SVG.
Technologies: C#, Ember.js, Angular, .NET, SQL, APIs, Git, REST APIs, Software Development

Openplay Gym Software
A large-scale gym and leisure booking software. I worked on the customer-facing side of Openplay's apps and helped build new features and maintain current ones. Also, I implemented a new venue finder map using Mapbox, an account section for users, and an online joining app where users could sign up for new memberships.

Roast My Speech
A landing page and blog for a productized speech editing service. The idea for the landing page was to focus on optimization and conversions, which led to a heavy amount of copy. I added a blog so that content can be regularly updated.

The Daily Anchor
A free well-being tool to track daily health actions. Users can write down gratitudes daily and tick off their daily anchor when they've done some movement, mindfulness, or something mellow. This full front-end project using React does not require users to sign in. The app calls an API to get random Stoic quotes.

The Alpines

A small personal blogging project. I set this up using Gatsby and Netlify CMS so people other than me could write blog posts without code. It's a simple blogging site focused on mountain ski resorts. It uses React Helmet to optimize SEO.


JavaScript, HTML5, CSS3, CSS, HTML, TypeScript, C#, SQL


React, REST APIs, React Redux, Node.js


Front-end, Single-page Applications (SPA), Front-end Development, Responsive UI, Styled-components, Responsive Web Apps, APIs, SaaS, Software Development, Storybook, OAuth, Deployment, Back-end, User Experience (UX), User Interface (UI), Enterprise Systems, Redux RTK, Gatsby


Jest, MUI (Material UI), Express.js, Redux, Next.js, Ember.js, Angular, .NET, React Native, Tailwind CSS


Git, Jira, Figma


Unit Testing, Scrum, Test-driven Development (TDD)


Mapbox, Visual Studio Code (VS Code), Netlify, Amazon Web Services (AWS)


PostgreSQL, Relational Databases

2006 - 2009

Bachelor's Degree in Sports Science

Essex University - Colchester, England, United Kingdom