Joni Halonen is a Senior Full Stack Developer at Sustashift since April 2025, with a diverse background in software development and technology. Joni's earlier roles include Full Stack Developer at Securitas Technology Suomi from January 2023 to April 2025, and Full Stack Developer at STANLEY Security Finland from May 2019 to February 2023, where expertise in UI/UX design and technologies such as Angular, TypeScript, and .NET was applied. Prior to these positions, Joni worked as an Escape Room Game Master at Truescape, a Virtual Training Environment Support member during compulsory military service with the Finnish Defence Forces, and an Independent Contractor for Appen. Joni also gained experience as a Web Developer at Helsinki Business College Oy, contributing to a successful database web application project. Educational credentials include a Vocational Qualification in Information and Communications Technology from Helsinki Business College Oy and a Bachelor of Engineering in Information Technology from Metropolia University of Applied Sciences.
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