How I work
- Clean architecture
- Maintainable components
- Performance-first thinking
- Thoughtful user experience
Callum Tremayne
Full-Stack Developer building scalable, production-ready digital platforms.
Enterprise CMS Engineer • Modern JavaScript Product Builder
Founder of Tremayne Digital Solutions
🇬🇧 UK · GMT
Next.js
TypeScript
C# / ASP.NET MVC
React
Sitecore
Solr
PostgreSQL
Vercel
NodeJs
Jenkins
GitLab
JIRA
Building robust systems across enterprise and modern stacks.
I’m a full-stack developer experienced in delivering large-scale enterprise web platforms as well as independently shipping modern, database-driven products.
In my current role, I work within a C# ASP.NET MVC architecture using Razor Views, React, Sass, Sitecore CMS, and Solr. My work spans feature development, UI implementation, performance optimisation, API integrations, and cross-team collaboration.
Alongside this, I design and deploy independent full-stack applications using Next.js, TypeScript, and PostgreSQL-based backends. This dual experience allows me to bridge structured enterprise systems with modern product-focused engineering.
Currently
Enterprise engineering by day. Modern product development by design.
Full-Stack Developer
Leeds Beckett University
September 2023 - Present
Working within a large-scale Sitecore CMS environment built on C# ASP.NET MVC, React, Sass, and Solr. Contributing to structured content architecture, performance optimisation, API integrations, and cross-team delivery across a high-traffic institutional platform.
C#
ASP.NET MVC
React
Sitecore
NodeJs
Solr
Sass
Jenkins
JIRA
GitLab
Founder - Lead Developer
Tremayne Digital Solutions
Feburary 2026 - Present
Building and deploying modern full-stack applications using Next.js, TypeScript, PostgreSQL (Supabase), Payload CMS, and Vercel. Focused on scalable architecture, clean component systems, and production-ready deployments.
Next.js
TypeScript
Tailwind CSS
Supabase
PostgreSQL
Payload CMS
Vercel
GitHub
Approach
I enjoy building products from idea to deployment, balancing user experience, performance, and maintainable architecture.
My experience across enterprise CMS systems and modern JavaScript stacks enables me to:
Work confidently within large-scale structured environments
Design clean, modular component systems
Integrate third-party APIs and external services
Model relational databases effectively
Ship production-ready features with long-term maintainability in mind
Enterprise Experience Highlights
Full Website Rebrand
Enterprise CMS
Led front-end delivery for a complete institutional website rebrand across templates and content journeys.
- Implemented a new design system across CMS templates
- Built modular Razor and React components
- Delivered responsive, accessible UI patterns
View more details
- Aligned legacy modules with updated interaction patterns
- Standardised Sass architecture for maintainability
This project required cross-team coordination between design, content, and engineering while ensuring scalable implementation inside a structured enterprise CMS architecture.
UCAS Tariff Calculator
API Integration
Led implementation of a faster, modern tariff experience integrated directly into the institution website.
- Integrated UCAS API for live qualification data
- Built real-time scoring logic for tariff calculations
- Created a modern React Select experience
View more details
- Reduced interaction friction versus the standard calculator
- Improved responsiveness across desktop and mobile
This project required resilient API integration, careful validation logic, and performance-first UI decisions to keep the experience fast and reliable under frequent use.
Selected Project Highlights
Hathersage FC
Live
Official Grassroots Football Club Website
A modern, community-focused website for Hathersage FC, designed to present fixtures, results, squad information, news, sponsors, and club updates through a polished, responsive frontend experience.
Project Exit
Live
High-Performance Marketing Website
A modern, conversion-focused marketing website designed to communicate the Project Exit platform clearly through trust-driven messaging, intuitive layouts, and high-performance frontend implementation.
Tremayne Digital Solutions
Live
Brand & Platform Development
A high-performance digital studio website built with Next.js and Tailwind CSS, designed to position a modern development brand and convert inbound client enquiries through structured messaging, performance optimisation, and scalable architecture.
Professional Focus
I'm motivated by roles where I can contribute to scalable architecture, improve engineering quality, and help build products that deliver measurable impact.
Product teams
Modern React/Next.js
Quality-focused engineering
Clear ownership