Stack Holdings

Stack Holdings is a Vienna-based Software-as-a-Service portfolio company operating productivity-boosting cloud platforms used by over one million B2B customers worldwide. Stack Holdings products currently include eversign (eversign.com), invoicely (invoicely.com) and ZeroSSL (zerossl.com). In early 2015 Julian and Paul Zehetmayr, two brothers and Co-Founders, started building a diverse set of well performing, highly scalable micro-service APIs to help businesses and developers around the world automate complex processes, such as currency conversion, file conversion and different types of data validation. In the course of almost seven years, the brothers scaled their portfolio to a total of 20 market-leading API products and over a million customers all around the world. In late 2020, apilayer was acquired by the Texas-based technology giant Idera, Inc. In 2016, the Zehetmayr-brothers founded Stack Holdings and expanded their reach into the Software-as-a-Service market, building invoicely (invoicely.com), the now market-leading online invoicing platform, eversign (eversign-com), an advanced eSignature platform leading the European eSignature industry, and ZeroSSL (zerossl.com), the first ever intuitive and subscription-based provider of SSL certificates. Together, these three SaaS products serve a total of one million customers globally. We are a small, but highly skilled team of 20 people based in Vienna and London, and we are always on the lookout for great talent based in or around Vienna and London. If you are interested in applying for an engineering position (frontend, backend, mobile, Q&A, DevOps), feel free to send an email to careers@stack.holdings and we are happy to connect.