Apr 2023 – Oct 2024 · 1 yr 6 mos · San Francisco Bay Area

• After 10 years at Square, where I grew from software engineer to company leader, I am taking some time away from work to build things with my own hands and be thoughtful about my next challenge.

Aug 2019 – Mar 2023 · 3 yrs 7 mos

• General manager leading Product, Design, and Engineering for the Square Payment Platform, a 200+ person organization. The Square Payment Platform is an application platform that provides payment facilitation and money movement services spanning business and individual identity verification and activation, payment acceptance through APIs and SDKs, and settlement (including reporting and balance keeping). It powers payments for the Square ecosystem with a payments volume north of $150Bn.

Oct 2015 – Jul 2019 · 3 yrs 9 mos

• Engineering lead for 14 teams (14 managers, 75 engineers) that enable the core parts of Square's payment processing platform, from payment acceptance to merchant settlement: Payment APIs, Payment Intelligence, Payment Infrastructure, Billing, and Settlement

Oct 2014 – Sep 2015 · 11 mos

• Engineering Manager for the Settlement (8 engineers) and later Payment Product teams (14) engineers, focused on the internal payment platform and merchant settlement.

Aug 2013 – Oct 2014 · 1 yr 2 mos

• Engineer on the Settlement team. Extracted the settlement business logic from Square’s monolithic Ruby on Rails application and shipped Square’s next-generation, Java-based settlement service, Ledger.

Jun 2013 – Jul 2013 · 1 mo · San Carlos

• Advised and engaged in the hiring of software engineers and built a RESTful e-commerce API on top of Magento from scratch.

Jun 2012 – Apr 2013 · 10 mos · Palo Alto

• Full stack engineer on the eCom team with the goal of transitioning from the Magento eCommerce system to a custom-built, modern SOA eCommerce platform designed around personalization.

Jan 2010 – Jun 2012 · 2 yrs 5 mos · Berlin und Umgebung, Deutschland

• Custom software development and consultancy of startups and established companies on strategic, infrastructure, and organizational matters. Contributed patches to the xorg multitouch touchpad driver, shipped by Ubuntu and other Linux distributions.

Aug 2008 – Dec 2009 · 1 yr 4 mos

• Technical direction for the operations of a real-money poker and backgammon online gaming platform with 200,000+ registered users. Conceived new gaming products. Led geographically distributed engineering and UI design teams in Germany and a customer support team in Malta. Actively contributed code in C/C++, Java/JSP, SQL, HTML.

Sep 2005 – Jul 2008 · 2 yrs 10 mos

• Led the engineering and UI design teams. Managed projects, e.g. poker server, game client, Oracle and MySQL database back-ends, and the web-based Customer Information System (WebCIS). Performed quality and release management for user-facing products. Developed the poker server in C++, contributed code to various projects.

Jun 2001 – Aug 2005 · 4 yrs 2 mos

• Designed and implemented a go, chess, and a poker server (in production use since 2004) in C++, as part of a scalable distributed game system for thousands of players. Added OpenSSL encryption to Playmaker‘s proprietary TCP/IP networking library. Designed and implemented a fast 2D graphics engine for the game client with collision detection.