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I'm Jan Karlo Dela Cruz, a Sheffield-based software engineer with 8 years of experience in web frontend and backend development. I specialize in building scalable Node.js and React.js applications and enjoy tackling complex problems in performance, reliability, and architecture.\n\nI'm passionate about compilers, parsers, and optimization, and I'm open to hybrid/remote roles where I can lead projects from conception to completion while collaborating with cross-functional teams.…I'm Jan Karlo Dela Cruz, a Sheffield-based software engineer with 8 years of experience in web frontend and backend development. I specialize in building scalable Node.js and React.js applications and enjoy tackling complex problems in performance, reliability, and architecture.\n\nI'm passionate about compilers, parsers, and optimization, and I'm open to hybrid/remote roles where I can lead projects from conception to completion while collaborating with cross-functional teams.

Jan Karlo Dela Cruz

Full Stack Developer, Back-End Developer, Front-End Developer, +2

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I'm Jan Karlo Dela Cruz, a Sheffield-based software engineer with 8 years of experience in web frontend and backend development. I specialize in building scalable Node.js and React.js applications and enjoy tackling complex problems in performance, reliability, and architecture.\n\nI'm passionate about compilers, parsers, and optimization, and I'm open to hybrid/remote roles where I can lead projects from conception to completion while collaborating with cross-functional teams.…I'm Jan Karlo Dela Cruz, a Sheffield-based software engineer with 8 years of experience in web frontend and backend development. I specialize in building scalable Node.js and React.js applications and enjoy tackling complex problems in performance, reliability, and architecture.\n\nI'm passionate about compilers, parsers, and optimization, and I'm open to hybrid/remote roles where I can lead projects from conception to completion while collaborating with cross-functional teams.

Available to hire

I’m Jan Karlo Dela Cruz, a Sheffield-based software engineer with 8 years of experience in web frontend and backend development. I specialize in building scalable Node.js and React.js applications and enjoy tackling complex problems in performance, reliability, and architecture.\n\nI’m passionate about compilers, parsers, and optimization, and I’m open to hybrid/remote roles where I can lead projects from conception to completion while collaborating with cross-functional teams.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

Work Experience

Backend Developer at Careful

November 1, 2024 - March 1, 2025

Scaled their careful.online mobile app to support more traffic. Migrated to an event-driven architecture via Azure Service Bus to scale background tasks. Reduced endpoint response times from 4 seconds to under 500ms.

Full Stack Engineer at Actioncy

October 1, 2024 - October 1, 2025

Built the fortnite.com/competitive website. Created infrastructure from scratch with AWS, Terraform, Helm and Cloudflare Workers. Delivered the MVP React Router 7 app in under 3 months. Worked with Epic Games team to build Fortnite UI components. Launched with marketing release, averaging 1 million users per day. Re-contracted to lead the site's reliability and product polish.

Software Engineer III at SuperAwesome, an Epic Games company

April 1, 2023 - August 1, 2024

Full stack role; improved their ad-server platform and embedded VPAID video player. Led a team of 4 to launch 3rd-party programmatic ads across regions, adding $2M revenue. Built a content curation platform in a hackathon, winning an award and creating a new revenue stream. Major contributor to VPAID support and ad event tracking, enabling interactive video ads. Cut CI/CD lead time 40% and removed device-specific bugs via AWS Device Farm in CI.

Senior Software Developer at Daily Mail Group Events

September 1, 2022 - December 1, 2022

Contributed to backend and frontend improvements for event platforms. Enhanced performance and reliability of event-related services during peak traffic periods.

Senior Frontend Developer at Photobox

February 1, 2021 - April 1, 2022

Led frontend initiatives, delivering scalable UI components and improving web performance across campaigns and product features.

Senior Backend Developer at BP

December 1, 2020 - February 1, 2021

Worked on backend services, improving reliability and performance for critical energy-sector applications.

Senior Full Stack Developer at Eurostar

July 1, 2019 - October 1, 2020

Delivered full-stack solutions for customer-facing platforms, focusing on performance, reliability and scalable architecture.

Frontend Developer at Creative Technologies

February 1, 2019 - May 1, 2019

Implemented frontend features for client projects, collaborating with design and backend teams to ship polished UI.