The Team

Justin Calleja

Full Stack Engineer

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Justin is a Full Stack Engineer at RocketFin, working with the firm's Malta Delivery team on client trading and workspace platforms. He brings more than a decade of full-stack experience across React, TypeScript, Node.js and AWS, with a strong leaning toward back-end and infrastructure-as-code.

Before joining RocketFin, Justin was a Fullstack Developer at Play North, building APIs and infrastructure on AWS (Lambda, ECS, MSK Kafka, CDK, Serverless) and contributing Next.js front-end work. Earlier he spent over four years as a Frontend Developer at Mr Green / William Hill, rewriting an internal back-office from Go templates to React + Material UI, releasing brand front-ends across multiple jurisdictions, and building Typescript + React micro-apps to MGA-regulated standards. Prior to that he held engineering roles at Raketech and Ricston, including teaching Mule Essentials courses.

Justin holds a BSc in Computer Science & AI and a BCom in Banking, Finance and Economics — both from the University of Malta. He reports into Albert Herd, Technical Director, and is based in Malta.

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