Cian Guinee is a Software Engineer at HackerOne, holding this position since June 2025. Prior to this role, Cian was a Back End Engineer at Kitman Labs from June 2022 to June 2025 and worked as a Software Developer at edgescan from August 2019 to June 2022. Earlier experience includes a Web Developer role at Ante Technologies LLC for a brief period in 2019 and as a Junior Web Developer at ALTV Media from May 2017 to May 2019. Cian has expertise in a technology stack that includes Angular, SQL (PostgreSQL), NoSQL (MongoDB), PHP, Node.js, and Python, contributing significantly to the rebuild of an inherited Go codebase into a serverless API using AWS Lambda. Cian earned a Master’s degree in Computer Science from Trinity College Dublin in 2019, following a Bachelor’s degree in the same field from the same institution in 2018.
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