The Fractionals is a dynamic community of top-tier fractional executives, founders, and senior leaders who are shaping the future of leadership. Our mission is simple: accelerate the growth of the fractional leadership in the Netherlands and beyond.Join us if you’re a forward-thinking leader who’s passionate about driving change. Register your interest at https://bit.ly/TheFractionals-Apply

Source.ag is accelerating the global transition to sustainable agriculture with A.I. powered greenhouses. Our team of experienced engineers and plant scientists has partnered with the world’s leading growers to build the sector’s most advanced artificial intelligence. Our proprietary algorithms simulate plant behavior to define and execute optimal cultivation strategies, taking into account millions of data points on climate, biology, and resources. By enabling growers to operate more hectares more efficiently through our pioneering tech, Source.ag is making greenhouse agriculture more accessible, profitable and globally scalable.Together, we’re on a mission to produce more fresh fruits and vegetables for more people - using less resources.

As Director Engineering & Architecture for the department Operations Decision Support and the KLK-BCG Partnership I focus on creating and maintaining a cohesive overall architecture and technological vision for the products and platforms developed at ODS and the Partnership. I help teams within ODS and BCG/KLM Partnership teams to build their products in accordance with this architectural vision. I lead a group of software engineers, data engineers & data scientists in building innovative products to support and enhance decision making. I'm also responsible for ensuring high engineering standards in our development efforts. I do this by setting up and maintaining development and architecture guidelines, coaching teams and participating in recruitment efforts.Another main focus area is to foster an Engineering Culture within the department that leads to acquiring and maintaining more Engineering, Data Science and Operations Research talent. I'm directly responsible for hiring and coaching tech talent.

I was hired by KLM to spearhead their Big Data efforts. With completely new teams, we're building platforms that will form the basis for all efforts at KLM to make optimal use of their operational data to increase efficiency of their operational processes. Among the goals: improve and predict turnaround processes by extracting intelligence from data, predict no-shows, predict delays, predict engine failures, centralize data warehousing in a data lake etc.
My role at KLM is twofold: I architect and help build their data platforms, but I also coach their teams - BI experts/developers - to become proficient with the Big Data ecosystem and tooling (see below) so they can continue building on the platform.
I also help data scientists industrialize their models and bring them to production, teaching them data engineering skills in the process.Tech: Spark, Kafka, Flume, NiFi, Cassandra, HBase, HDFS, Scala, Python, scikit-learn (KLM runs the Hortonworks Data Platform as Hadoop distribution)

High-tech carve-out using the power of artificial intelligence to optimize airline planning & control.A Boston Consulting Group, BCG Gamma and KLM Royal Dutch Airlines digital partnership in real-time integrated decision-making. Customers include the world's leading airlines.

I specialize in bringing technological innovation to teams, and building great products. I can help you out as an expert software engineer, writing beautiful code to make your ideas happen. I’m also in the know about emerging new technologies that can help you/your team reach your goals more quickly and efficiently, while increasing team happiness. Let me help you bring you/your team up-to-speed in current and future best practices in the areas of Softare & Data engineering, continuous integration, deployment and delivery, containerization, API-first and software craftmanship.

Together with friends, I built a complete software solution for Charge Point Operators to take control of their smart charging stations and monetize them. ChargeGrid is a OCPP 1.6 compliant charging backend & management portal. In 2017 we open-sourced the complete ChargeGrid backend.See: https://github.com/chargegridTech: Clojure, Websockets, Compojure API, PostgreSQL, React, Javascript

At VPRO I built modern, well-tested APIs for modern web experiences. My main project was working on the new APIs behind the updated version of Cinema.nl (soon to be released). I also helped the VPRO build a modern API platform for exposing media metadata that can be consumed by a multitude of applications from various stakeholders.Tech: Java 8, JAX-RS (RestEasy), Spring, Hibernate, ElasticSearch, PostgreSQL, Rest-Assured

Universit is pivoting their product from being a pure Mobile Device Management solution to being a complete platform for Telecom distributers and resellers to sell mobile workspaces, including: connectivity, cloud services (automatically provisioned using their APIs), hardware, etc.I was brought in because Universit wanted to overhaul their way of working and their technology stack. The wanted to move from a semi-Agile organisation, still rooted in waterfall practices, to a completely lean & agile startup mentality. At the same time, they wanted to move away from their .NET stack towards a more Linux-friendly technology stack.I set out with a largely new team to spin off functionality of the existing platform into microservices built in a more modern and Linux-friendly tech stack, mostly based around the JVM (Scala & Clojure). We experimented with some different backend and frontend technologies, by building one-day prototypes.Tech: Scala, Play, Scalatra, Finatra, Slick, Python, C#, .NET Core, Clojure, Clojurescript & Reagent, Javascript, React

I joined The New Motion to design and realise their (Big) Data strategy. I identified all data that’s spread out through the company and brought it together in a central Hadoop-based hub, based on the Cloudera Hadoop distribution. Using this data warehouse and the technologies from the Hadoop ecosystem, I enabled data-based decision making in the daily jobs of the people at TNM.To support a data-driven company culture and empower people to ask the right questions from the data, I created various custom tools that make tasks like querying the cluster and creating dashboards much easier. Furthermore I introduced tools like Tableau to enable a true self-service data environment.In a team of data engineers, we then focused on:- Ingestion of data from external sources (Salesforce, Navision) using Avro, KiteSDK and more.- Enabling more up-to-date data ingestion for our relational data sources using Sqoop- Speeding up ETL processes using Spark- (Near) Realtime ingestion and aggregation of application & system logs, click streams and other fast-moving metrics using Flume, Kafka and Spark Streaming- Integrating existing infrastructure/applications with the Hadoop systems.- Predictive analytics and machine learning using Spark MLLibTech: Hadoop, Spark, Sqoop, Pig, Impala, Flume, Kafka, Scala, Python, NumPy, SciPyBecause of my broad expertise, I also did a lot of work as full stack engineer, building microservices for the real-time charge point backend, pricing and settlement-systems and internal tools for charge point installers/maintenance.Tech: Scala, Spray, Play, Slick, PostgreSQL, Akka & Akka Persistence, Stamina, Scalatra, AngularJS, React, Coffeescript (later switched to EcmaScript 2015)Lastly, I spearheaded the automation and containerization of our infrastructure, moving from self-hosting to an Amazon AWS based setup.Tech: Saltstack (automation), Docker (containerization), Fabric (see https://github.com/DandyDev/fabdocker), Amazon AWS

At Info.nl I was responsible for developing Java EE webapplications for large clients in and outside of The Netherlands, such as Greenwheels and Allianz, using technologies like Java, JavaEE 7, PostgreSQL, OpenMQ, Glassfish 4, Scala, Gatling, Spring, Stripes and the Magnolia CMS.For Greenwheels I involved with a project to build a brand new booking system using JavaEE 7, PostgreSQL, OpenMQ and following principles of CQRS.I was also responsible for architecting and developing BigData applications using Hadoop, Pig, Cascading, Hive and Impala for analysing application logs for the whole company and for analysing customer- and behavioural data that our clients’ applications generate. For this purpose I developed some extensions to Flume to help us gather logs in custom formats into HDFS using the Avro format (see: https://github.com/DandyDev/flume-plugins )Tech: JavaEE7, PostgreSQL, Spring & Spring MVC, OpenMQ, Glassfish 4, Scala, Gatling (functional & stress testing), Stripes, Hadoop, Flume, Pig, Hive

I've taught datastructures and algorithms to graduate students majoring in ICT. The course is co-developed with a fellow lecturer and covers most basic datastructures, searching and sorting algorithms, time-complexity, Java Collections Framework and Generics.

I've taught an existing course in Cryptography and Security to graduate students majoring in ICT. The course covers the history of cryptography and the practical workings of the most used cryptosystems and applies a pragmatic combination of hands-on labs and theoretical lectures.

My bachelor thesis revolved around the question in what way BigData technologies, and Hadoop in particular, could be applied in a marketing context, for the processing and analysis of customer- and response data. This particular internship caught my attention because it's less common to see BigData problems identified and tackled in the realm of marketing. 2organize was looking for ways to both increase the efficiency in processing data for their clients and glean more insights and extract more value from the data form their customers that was used in marketing automation processes. I formulated ways in which marketing (automation) processes could benefit from using technologies like Hadoop, Pig and Hive. In the end, I worked together with the marketing intelligence analists to deliver a Hadoop-based prototype that was used to gain insights in the response data from a series of large-scale email campaigns for a big client.Tech: Hadoop, Pig, Hive, Cascading

Developing small to medium-sized actionable websites for high profile clients in Ruby on Rails. Most websites were part of multichannel marketing campaigns that typically had a lifecycle of a couple of months to a half year. Because of the relatively short lifespan of those websites, and the changing requirements, development was done under strict deadlines and within an agile mindset.Clients include Vodafone, KPN, NS (Dutch railways) and others.Tech: Ruby on Rails 3

I’ve developed an extracurricular course for collegestudents covering the history of cryptography and detailing the most common cryptosystems, applying a pragmatic combination of hands-on labs and theoretical lectures.

Leading a team of 5 – 10 developers and designers in bringing the MOvE Online CMS for Artists to the next level. Responsible for transitioning the company to using SCRUM. Several systems that were designed by me: new Authentication system, API, Functional design for future Mobile App, and a host of new features in the CMS that led to a customer growth of 50% in 18 months.Tech: PHP, Symfony Framework, Zend Framework

Responsible for building new features and modules for a hosted CMS solution geared towards Artists and Musicians. Extensive use of: PHP5/Symfony/Doctrine/MySQL/HTML5/CSS3Also responsible for server installation and maintenance (Ubuntu Server, LAMP stack)Tech: PHP, Symfony Framework, Zend Framework

I (co-)developed and participated in many musical projects as pianist/composer/arranger/bandleader and producer. I toured extensively, including a tour to Singapore and other appearances abroad.Some of the highlights:• Composed, recorded and co-produced album for Dutch singer Renee van Bavel• Composer, arranger, musical director and pianist of 4 major theatrical tours with Renee van Bavel• Composer, arranger, musical director and pianist of 3 festival productions for the large Boulevard Festival.• Arrangements and orchestrations of 3 opera shows for Theatre Company Hofplein• Various other appearances as recording artist and live pianist