Callum Sims
Full Stack Web Developer
Personal Statement
Key Skills
Front End
Back End & APIs
Infrastructure, Deployment & Tooling
Experience
Freelance UX/UI Testing (2022): Conducted usability testing and UI reviews for mobile apps.
Triangle Fire Group
Part-Time IT Assistant (April 2023 - May 2024)
- Completed 315 hours of voluntary work experience, providing IT support and admin assistance.
- Resolved day-to-day hardware, software, and user issues while helping with internal system setup.
- Contributed early code changes and support work on internal tools.
Full-Time Junior Full Stack Web Developer (May 2024 - March 2026)
- Developed and maintained internal web applications, supporting services, and APIs.
- Delivered new features, framework upgrades, bug fixes, and maintenance across application code, supporting APIs, and related services.
- Worked in a small development team with frequent stand-ups, peer reviews, and regular meetings to plan and refine work.
- Gathered requirements with departments and translated them into practical, user-focused solutions.
- Replaced paid software with in-house tools, improving data ownership and reducing company costs.
- Improved UX and refactored legacy code to reduce complexity, improve performance, and support maintainability.
Full-Time Full Stack Web Developer (March 2026 - Present)
- Lead development of the company's Ionic/Angular PWA and other internal web applications, working across front end, APIs, deployment, and supporting infrastructure.
- Work across multiple companies within Triangle Fire Group, supporting and improving apps and services with different operational requirements.
- Own features end-to-end, from gathering requirements and refining designs through implementation and rollout.
- Work directly with stakeholders to deliver practical solutions that streamline admin and staff workflows.
- Continue improving usability, performance, maintainability, and opportunities to bring tools in-house.
Tech Odyssey
Self-Employed Full Stack Web Developer and IT Consultant (May 2024 - Present)
- Developed gracehartjolley.me, a custom CMS-driven portfolio using Laravel, Angular, Tailwind, Docker, Traefik, VPS hosting, and client content management tools.
- Built WordPress sites for Total Repoint and MB Electrical, including responsive layouts, SEO work, and Google Business Profile setup.
- Manage hosting, containerised VPS deployment, domains, DNS, SSL, email, backups, updates, and bug fixes across all client projects.
- Translate non-technical client requirements into practical solutions, improve SEO, page speed, and mobile UX, and build CMS features that reduce reliance on third-party builders and plugins.
- Design and specify residential networking and CCTV systems for clients and contractors.
Private Projects
Grace Hart Jolley
Custom portfolio and CMS platform for an emerging artist, built with Angular 19 and Laravel 12 in a containerised Docker environment. Includes a protected admin area with authenticated management of projects, events, categories, featured images, and page content, using API-driven architecture and secure Laravel authentication to support a maintainable full-stack application rather than a template-based site.
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Sakura Bonsai
Responsive e-commerce WordPress site built with WooCommerce, mobile-friendly layouts, and SEO-focused content structure.
Visit SiteTotal Repoint Cloud App
Internal PWA for HR, finance, project tracking, and job reporting. Built with Ionic/Angular, Symfony, PDO, Phinx, and Docker, with offline-friendly workflows for field use.
Total Repoint Website
WordPress website for a building company, with responsive design, SEO improvements, and supporting Google Business Profile setup.
Visit Site
MB Electrical
WordPress brochure site for an electrician, built to improve local visibility, mobile UX, and overall online presence.
Visit SiteEducation
Triangle Fire Group: 315 hours of voluntary work experience and training in software development and general IT department operations
East Sussex College: T Level in Digital Design, Production & Development
St Leonards Academy: GCSE Computer Science; GCSE Effective Digital Working Practices