Sep 2021 – Apr 2023 · 1 yr 7 mos · Remote 🌎

• With StepZen you can build a GraphQL API that gets the data you need from REST, GraphQL, databases or any other data source.
• I'm working with the engineering, product and marketing people at StepZen on improving their products, attracting new users and creating content.

Aug 2020 – Sep 2021 · 1 yr 1 mo · Amsterdam, North Holland, Netherlands

• Leading the Engineering department at Vandebron (25-30FTE), a greentech innovator (100M+ revenue) on a mission to transform the energy market.
• Led 6 software development teams at Vandebron, focused on frontend, backend and platform engineering to build cutting-edge software.
• Improved developer efficiency and developer productivity, hosted numerous internal and external developer-focused events.
• Managed the Engineering Department budget, ensuring efficient resource allocation and project delivery. Including cloud cost optimization and vendor procurement.
• Part of the MT (Management Team) to drive company-wide innovation and transform the energy market with greentech solutions. Reporting directly to CTO.
• Technologies include React, TypeScript, GraphQL, Scala and Kubernetes.

Oct 2018 – Jul 2020 · 1 yr 9 mos

• As a Senior Developer I work on open-source products that use and visualize all open data that is made available by the Municipality of Amsterdam. These products are mainly built in JavaScript (React + Node) and can be found at https://data.amsterdam.nl or https://github.com/amsterdam/.
• I gave a talk about "Open-sourcing JavaScript at the City of Amsterdam" during All Things Open 2019 in Raleigh, North Carolina.
• Technologies: JavaScript (Vanilla, ES6+, React, Angular), Redux, GraphQL, D3, Leaflet, Webpack

Dec 2016 – Aug 2020 · 3 yrs 8 mos · Amsterdam Area, Netherlands

• SwitchBay is a user-to-user marketplace created to make buying and selling of used consumer electronics as safe and simple as possible. Compared to other online marketplaces, SwitchBay provides buyer and seller protection, great user experience and the right price for buyer and seller. In 2018 the platform has sold over 22k products resulting in €500k GMV.
• Responsibilities included: part of leadership, product management and lead full-stack development (devOps, recruiting and coaching of junior developers).
• Technologies: JavaScript (Nodejs, React, React Native), Redux, PHP (Symfony, Laravel), SQL, Nginx, DigitalOcean

Sep 2014 – Nov 2016 · 2 yrs 2 mos · Amsterdam Area, Netherlands

• Wundershift is a global digital agency based in Amsterdam, the Netherlands. We help our clients reach digital breakthroughs in a world of accelerating change. Clients include KPN, TMG Online & Google.
• Responsibilities included: defining technical requirements and scope, tendering of development partners, managing development teams and product release management.

Jan 2012 – Jul 2024 · 12 yrs 6 mos · Amsterdam, North Holland, Netherlands

• Building, investing and advising startups and developers.
• 👉 https://hackteam.io

Jan 2007 – Jan 2012 · 5 yrs

• Peer-to-peer marketplace that relied on the Circular Economy by allowing users to trade their used DVD's and Blu-Rays for free. An algorithm matched demand and supply to keep the products flowing. Also, users could pay a monthly fee for a premium model with more matches and enhanced visibility on the website. At the end of 2012 the platform had over 20,000 registered users, including almost 2,000 premium users.
• Technologies: PHP, JavaScript (Vanillia, jQuery), Nginx