Carlos Martin Doncel

Denys Skalenko is Vice Director, Head FX and Digital Assets Software Engineering at Swissquote, a position he has held since July 2019 and is based in Gland, Switzerland. In this role he leads software engineering across Swissquote's FX and digital assets business lines. Prior to this appointment, he served at Swissquote as Associate Director and Forex Software Development Manager from January 2018 to July 2019, responsible for the Forex division within the Software Development Department, and before that as Technical Lead from September 2016 to December 2017, where his stated responsibilities included leading technical architecture discussions, evaluating new technologies, and coaching team members.

Before joining Swissquote, Skalenko worked at Luxoft, progressing from Java Software Engineer (2013–2014) through Senior Software Engineer (2014–2015) to Java Team Tech Lead (2015–2016), where he was responsible for communicating with clients, managing project quality, and reporting on project status and team performance. He also held coaching roles at SkillsUp in JavaEE and SQL between 2015 and 2016, and was a Software Engineer at IS Predict GmbH from 2011 to 2013. His total professional experience across these roles spans approximately 15 years. He holds a Master's degree in Informatics (2010–2011) and a Bachelor's degree in Applied Mathematics (2006–2010), both from Oles Honchar Dnipropetrovsk National University.

Jimmy Tahoulas is Digital Assets Custody Manager, Associate Director at Swissquote, a position he has held since January 2019. Based in the Lausanne region of Switzerland, he has been with Swissquote for over seven years across two roles. His current mandate centres on digital assets custody management within the Finance & Accounting department at the Manager level.

Prior to his current role, Tahoulas served as Technical Project Manager at Swissquote from February 2018 to January 2019. Before joining Swissquote, he spent nearly three years as a Java JEE Developer at AGENTIL Group in Geneva, from March 2015 to February 2018, where he led the migration of a worldwide distributed SAP monitoring application from a Java Swing to a Java web architecture. In that role he worked across front-end and back-end development, implemented a continuous integration platform, and presented at CA World 2016 in Las Vegas. His total professional experience spans approximately 13 years.

Marios Sfantos is Head eFX Spot & Digital Assets Trading, Vice Director and Member of Senior Management at Swissquote, a position he has held since July 2024. In this role, he leads the eFX Spot and Digital Assets Trading function at Swissquote's Gland, Switzerland base. Prior to this, he served as Co-Head eFX Trading with the title of Associate Director from July 2022 to June 2024. His tenure at Swissquote began in February 2012 as an eFX trader, giving him over eleven years of direct trading experience at the firm before moving into leadership positions.

Before joining Swissquote, Sfantos completed a portfolio management internship at EFG Asset Management in London from February to July 2011, and an earlier internship at BNP Paribas Wealth Management from October 2008 to March 2009. He holds an MSc in Financial Engineering and Risk Management from HEC Lausanne – The Faculty of Business and Economics of the University of Lausanne, completed between 2009 and 2012, and a BSc in Economics from Athens University of Economics and Business, where he studied from 2004 to 2008. He speaks English and Greek at native or bilingual level, French at a professional working level, and has elementary proficiency in German.