ChargebackStop
Piotr Mierzejewski is an experienced software engineer with a solid background in frontend development and team leadership across various organizations. Currently serving as a Founding Engineer at ChargebackStop since June 2023, Piotr previously worked as a Senior Software Engineer at VEED.IO and Whereby, focusing on growth and user engagement strategies. Piotr has led teams at Apptension, where a web-based motivation video calls platform was developed, and contributed to the development of user-friendly applications at SiteSell and other companies. Educational qualifications include a Master's degree and a Bachelor's degree in Computer Science from Poznan University of Technology.
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ChargebackStop
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ChargebackStop is a leading chargeback management platform built to help businesses prevent disputes, recover lost revenue, and protect their bottom line. Designed with SaaS and digital merchants in mind, ChargebackStop leverages automation and real-time data to detect high-risk transactions and stop chargebacks before they happen. Founded by John Hamilton and Che Sampat, the platform simplifies the complex process of dispute resolution by automating evidence collection, submission, and follow-up—saving time and increasing win rates. Whether you're a fast-growing startup or an established enterprise, ChargebackStop helps reduce fraud, improve merchant reputation, and boost customer trust.