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Darren Leonard

@darrenleonard

Senior full‑stack engineer specializing in scalable, high‑performance web systems and rapid prototyping.

United Kingdom
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What I'm looking for

I’m seeking senior engineering roles where I can drive architecture, improve performance, mentor teams, and deliver scalable web and real‑time systems in collaborative, product‑focused environments.

I am a senior full‑stack engineer with over 10 years of experience designing and building scalable, high‑performance systems. I specialize in React (web and native), TypeScript, and backend architectures using Node.js, PostgreSQL and GraphQL, and I focus on rapid prototyping, performance optimization, and robust, maintainable infrastructure.

My work has spanned SaaS, crypto trading platforms, and enterprise products where I led migrations to TypeScript, optimized database queries for large scale traffic, implemented CI/CD and security improvements, and built real‑time data pipelines. I enjoy solving complex challenges with well‑architected, user‑friendly solutions and improving developer productivity and system reliability.

Experience

Work history, roles, and key accomplishments

TR
Current

Staff Fullstack Engineer

Trustware

Jan 2023 - Present (2 years 9 months)

Designed and optimized backend architecture with Node.js, PostgreSQL, Prisma and GraphQL to ensure scalability and reliability; implemented security layers and CI/CD improvements with Docker and GitHub workflows, improving system performance and reducing latency.

Beauty Pie logoBP

Senior Frontend Engineer

Beauty Pie

Feb 2012 - Dec 2017 (5 years 10 months)

Built browser-based face detection and skin analysis features and a product recommendation system; developed innovative web interactions including a JavaScript game using eye-blink controls to enhance user engagement.

Education

Degrees, certifications, and relevant coursework

University of Chester logoUC

University of Chester

Bachelor's degree, Computer Science

2006 - 2010

Grade: 3.98

Completed a Bachelor's degree program focusing on foundational computer science and software engineering principles from April 2006 to August 2010.

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Darren Leonard - Staff Fullstack Engineer - Trustware | Himalayas