Theo Van Der Zee Email & Phone Number

Bilthoven, Ut, Nl

Theo van der Zee provides (senior) freelance conversion optimization consultancy. As a conversion specialist I help companies to improve their websites via expert reviews, user research (such as user testing, web surveys, heatmaps), web analytics, and A/B testing.I can build A/B tests myself in JavaScript and CSS. Therefore I can work with almost any A/B testing tool (including Optimizely, VWO, Adobe Target, AB Tasty, Convert and Google Optimize). Furthermore, I'm experienced in presenting A/B test results to stakeholders, including the usage of both frequentist and Bayesian statistics. In collaboration with multiple online marketing agency partners and in-house specialists, I have build, launched, monitored and reported hundreds of A/B tests. We performed those tests for small and large organizations, on a wide range of website technologies (including one-page apps such as React and Angular). In total, these tests have added millions of dollars in additional revenue for their clients.

SemWerkt is an online marketing agency focussed primarily on SEA and SEO. With their exhaustive knowledge of search engines, they help large and small companies to improve the return on investment of their online ads.For SemWerkt, I provide strategic CRO assistance. With the help of models, interactive strategy sessions, and expert reviews, I help their customers get a structured view of their conversion optimization opportunities.

Theo van der Zee provides presentations and workshops on topics related to conversion optimization. I've spoken at 20+ conferences in 5+ countries on topics such as: ecommerce checkouts, performance optimization, CRO for WordPress, optimizing for mobile, user research, and online psychology.Additionally, I've hosted many live expert review sessions in which I have reviewed websites and data of audience members on stage in real-time.

Theo van der Zee provides tailored (including in-house and on-the-job) training and coaching in conversion rate optimization. Over the years, I have given 250+ hours of training and coaching to employees and founders of 150+ different organizations (including ABN AMRO, Citroën, Rabobank and Peugeot).

Accenture Interactive helps clients create the best customer experiences on the planet, across the entire customer journey. Through their connected offerings in design, marketing, content, and commerce, they create new ways to win.For Accenture Interactive, I provide CRO consultancy. Using various CRO skills and tools at my disposal, I help their clients reach their online goals.

ConversionReview specializes in performing expert website reviews. Insights from these expert reviews help improve the user experience and increase the conversion rate. Clients range from large e-commerce shops to small and medium businesses.In this role, I do qualitative and quantitative CRO & UX research and provide clients with ideas on how to improve their website. These ideas, which can be used both as quick wins and A/B testing ideas, are put into a highly actionable report, which is then discussed with the client.

Norah offers a weekly updated collection of trendy fashion items for women. They now have over 75 brick-and-mortar stores (with new stores opening monthly) located across The Netherlands, Belgium and Germany.For Norah, I do qualitative and quantitative conversion research on their custom e-commerce webshop in order to find opportunities for conversion optimization. Next, I set up, run, monitor, analyze and report several A/B tests per month. These result in significantly improved revenue, margins and average order value (AOV).

Yonego is an ROI driven online marketing agency operating in The Netherlands and Belgium. From offices both in Breda and Gent experienced specialists are working daily at improving results and thinking up smart marketing strategies.In this role, I am handling the conversion rate optimization (CRO) responsibilities for all major clients such as Profile and Alliander. I perform expert reviews, do data analytics, and conduct user research in order to find potential improvements, which are then A/B tested on the websites. Furthermore, I also provide coaching and training within the company.

Magnetic Field is a growth agency specialized in digital strategy, measurement, conversion optimization, design and machine learning. Boosting digital performance is what we do with a team of experts.Plan, code, run, monitor and report A/B tests for brands like Citroën, Financieele Dagblad, Peugeot and PersGroep. Also providing conversion research, data analysis, and training for e-commerce companies like CreativeGroup and Nike.

SRM is a training institute for beginning and experienced professionals in marketing, online marketing and communication fields. With 20 employees and over 250 certified trainers they focus on contributing to the professional growth of their trainees.For SRM I both develop trainings and give them to students on a regular basis. My specialisations are conversion optimization and Google Analytics. Students rate me with an 8/10+ average and praise both my enthusiasm and insights into these fields.

Vilans is the national Centre of Expertise for Long-term Care in the Netherlands. In this field, Vilans engages in innovation, research and development, dissemination, and implementation of good practices.In this project, I was responsible for analyzing the main websites of this organization in order to uncover conversion rate optimization opportunities and user experience improvements. I did this mainly through expert reviews, user research and A/B testing. Furthermore, I have shared my findings during various internal meetings with the online marketing teams in an effort to show the value of conversion optimization to each of the stakeholders.

Tweepixels is a boutique web design studio that creates websites for small and medium businesses in the Netherlands. Our aim is to provide top-quality websites at a price point that is affordable to our target audience.In this company, I was handling the communication with (prospective) customers and drawing new customers to the website. Furthermore, I was also responsible for the backend web development and custom plugins that need to be build.

OrangeValley is an independent and certified online marketing agency specialized in improving online revenues. They are primarily working for the top 100 online businesses in The Netherlands.As a consultant at OrangeValley I'm using Conversion Rate Optimization to improve the websites of clients. By combining data from web analytics, business intelligence, psychological insights and best practices I form hypotheses on how to improve the conversion rate of their website and build tests to check these hypotheses. Aside from working for clients, I'm passionate about writing articles and giving presentations on strategic conversion rate optimization.

ThemePartner aims to develop highly flexible Joomla templates with stunning looks. The small team consists of an experienced back-end programmer, one front-end developer, and an SEO specialist.For this company, I was responsible for the Search Engine Optimization (SEO), analyzing and optimizing the customer journey, and both setting up and executing a targeted content strategy.

InsideGamer is a multichannel brand on TV, online, and at events. For more than 15 years, InsideGamer has brought the latest news about games for a broad audience, away from the attic. It is a widely supported social platform where gamers talk about games.In this job, I was leading the development on the third version of the InsideGamer website. Secondary tasks included improving the proprietary Content Management System and providing advice on Search Engine Optimization.

Msc, Work- And Organizational Psychology

The classes I was enrolled in were Organizational Psychology, Human Resource Management and Work Psychology. I wrote my master thesis.

Internship Trainer Communication Skills, Psychology

During this internship, I was directly responsible for the training and guidance of several classes of students for the course.

Bsc, Social Psychology

After following the mandatory general psychology courses, I chose to major in Social Psychology. Within this major I enrolled myself.