Experience

Sephia

• Netherlands
• IT Services and IT Consulting
• 1 - 100 Employee

• Dev Herder

  • Feb 2023 - Present

  Like cats, but more argumentative. Sephia develops novel solutions for a wide variety of companies. In particular cloud agnostic clustered applications on Kubernetes, Linux, Dev-ops, extensive test suites and ML/Vision. More formally: managing director, tech lead and lead architect for a small but talented team of developers. Like cats, but more argumentative. Sephia develops novel solutions for a wide variety of companies. In particular cloud agnostic clustered applications on Kubernetes, Linux, Dev-ops, extensive test suites and ML/Vision. More formally: managing director, tech lead and lead architect for a small but talented team of developers.



Keana

• Netherlands
• Transportation, Logistics, Supply Chain and Storage
• 1 - 100 Employee

• Chief Technology Officer

  • Jan 2020 - Jan 2023

  Designed and built Keana, for improved city logistics Microservice architecture, using Go for the back-end, Vue+Typescript for front-end and Kubernetes(+Skaffld) to tie it all together Directly managed five team members and had fun doing so. Designed and built Keana, for improved city logistics Microservice architecture, using Go for the back-end, Vue+Typescript for front-end and Kubernetes(+Skaffld) to tie it all together Directly managed five team members and had fun doing so.



Daniel Gollings IT

• IT Services and IT Consulting

• Freelance DevOps

  • May 2013 - Jan 2020

  Independent contractor, specialized in solving complex problems creatively. Independent contractor, specialized in solving complex problems creatively.



Online Payment Platform

• Netherlands
• Financial Services
• 1 - 100 Employee

• DevOps Engineer

  • Sep 2019 - Dec 2019

  Helped migrate and test the migration to AWS Helped migrate and test the migration to AWS



Massarius

• Netherlands
• Online Audio and Video Media
• 1 - 100 Employee

• Backend Developer

  • Apr 2019 - Oct 2019

  Refactored and simplified the existing ETL process into easier to understand components using Airflow. Redesigning the entire backend and how to implement planned future projects. Also various R&D activities, mostly implementing machine learning for forecasting. Coaching and training of data scientists regarding challenges and approach from a developer perspective. Refactored and simplified the existing ETL process into easier to understand components using Airflow. Redesigning the entire backend and how to implement planned future projects. Also various R&D activities, mostly implementing machine learning for forecasting. Coaching and training of data scientists regarding challenges and approach from a developer perspective.



ING

• Netherlands
• Banking
• 700 & Above Employee

• Senior Application Architect

  • Apr 2014 - Mar 2019

  In reverse chronological order: Designed and created a security proxy in Golang for secrets management and auditing in a CI/CD pipeline Designed and created a custom Docker scheduler in Golang for containerized instances of security proxies --- Designed, created and maintained a large Docker cluster (Mesos/Marathon) for hundreds of teams in a CI/CD pipeline. Including dynamic traffic routing and automatic failover Designed, created and maintained a large Ceph cluster for stateful storage of team configuration, including automatic failover and resilience. Both using Puppet and later Ansible on RHEL7 vm's in a private cloud --- Designed and created a test result server for storage via backand and retrieval via frontend of automated testcases in Nodejs Designed and created a testcontainer service for teams. Allowing maximum freedom in testtools for teams whilst enabling a standardized way to start tests in a CI/CD pipeline. --- Miscellaneous activities included technical security audits for subcomponents, workgroups and presentations of new technologies. Show less



Ziggo

• Utrecht

• Technical Test Consultant

  • Nov 2013 - Jan 2014

  Tested On demand streaming with HP LoadRunner and JMeter. Created an Cassandra database test bed with three nodes and production like test data. In addition, because the Cassandra JMeter plugin used (CassJMeterD) didn’t have the required functionality I extended it with searching on Secondary Index (available on Github) New performance tests, production load simulation and Cassandra performance analysis Performance test analysis, Java, Python, Linux, REST, JMeter, Extended plugin, Cassandra Show less



bol

• Netherlands
• Retail
• 700 & Above Employee

• Performance Tester

  • May 2013 - Nov 2013

  Created new tests for a data center migration project at bol.com. Helped streamline the process of script creation (Jmeter templates and Git) and added extra monitoring capabilities. Personal favourite test was the creation of a test which accurately mimicked actual production usage on the front-end user facing side of bol.com. This particular test helped finding and optimizing potential bottlenecks preemptively. Python, Java, Jmeter and Linux Created new tests for a data center migration project at bol.com. Helped streamline the process of script creation (Jmeter templates and Git) and added extra monitoring capabilities. Personal favourite test was the creation of a test which accurately mimicked actual production usage on the front-end user facing side of bol.com. This particular test helped finding and optimizing potential bottlenecks preemptively. Python, Java, Jmeter and Linux



ORTEC

• Netherlands
• Software Development
• 700 & Above Employee

• Technical Test Consultant

  • Aug 2012 - Apr 2013

  Test automation specialist Designed and created an end to end test automation framework in C# for a top 5 Shell IT project. This framework was then used to test tens of thousands of legacy tests but also several sets which were custom designed for maximum coverage. As the software is in (Agile) development the drivers used where all 'sub gui', operating via WCF/SOAP, SQL or Comtec where necessary. An abstraction layer was written between the drivers and the tests for general functional use within the project with the additional technical benefit of decoupling tests and drivers. Performance Tester After which the entire thing was multithreaded with additional points of measurement for use in performance tests. Due to the complexity of this software, standard tools like JMeter weren't used in this case. Show less



Polteq

• Netherlands
• IT Services and IT Consulting
• 1 - 100 Employee

• Technical Test Consultant

  • May 2012 - Apr 2013

• Technical Tester

  • Apr 2011 - May 2012

  Speaker at Polteq Conference 2011 regarding Test Automation



Steinweg

• Rotterdam

• Performance Tester

  • Dec 2011 - Jul 2012

  Performance testing an application with legacy foundations. Due to legacy foundations HTTP is barely used within this application. Apart from creating, running and analyzing the performance tests this involved reverse engineering an unknown protocol and handshake. In addition it was necessary to rewrite JMeter's TCP stack and message handling in order to test this application, which proved an interesting challenge. Performance testing an application with legacy foundations. Due to legacy foundations HTTP is barely used within this application. Apart from creating, running and analyzing the performance tests this involved reverse engineering an unknown protocol and handshake. In addition it was necessary to rewrite JMeter's TCP stack and message handling in order to test this application, which proved an interesting challenge.



Swets Information Services

• Netherlands
• Information Services
• 1 - 100 Employee

• Technical Tester

  • Feb 2012 - Mar 2012

  Designing a proof of concept for an automated regression test suite which interacts with a legacy IBM 3270 application. Apart from trying a commercial solution this also involved ripping an open source solution (OSS) apart in order to use its Java based IBM 3270 code as an custom OSS alternative. Java, TestNG, Maven and modifying an OSS IBM 3270 codebase for a more user friendly automated regression testing suite. Designing a proof of concept for an automated regression test suite which interacts with a legacy IBM 3270 application. Apart from trying a commercial solution this also involved ripping an open source solution (OSS) apart in order to use its Java based IBM 3270 code as an custom OSS alternative. Java, TestNG, Maven and modifying an OSS IBM 3270 codebase for a more user friendly automated regression testing suite.



BinckBank

• Amsterdam Area, Netherlands

• Technical Tester

  • May 2011 - Dec 2011

  Designing and implementing an automated regression test for the Alex and Binck online brokerage service. Hosting two (functional) unit testing evangelisation workshops specifically for developers. Coaching a Binck colleague in performance testing, in order for him to work on a special internal project. Most important was the framework: enthusiastic use of basic programming principles, inheritance and abstraction allowed for a very easy to use automated functional testing tool. Designed to have a very custom feel but with minimal points of maintenance. Regression test designed using FitNesse, C# and Selenium 2 / WebDriver Show less



Furore Conclusion

• Netherlands
• IT Services and IT Consulting
• 1 - 100 Employee

• Technical Tester

  • Nov 2008 - Mar 2011

  Recent/Final projects: Itemedical: Proof of Concept for a client: Automated testing of Silverlight application. Parelsnoer: Developing from scratch a mock SOAP service and adapter for an existing .net application. Mock service was implemented in Python, rest in C#. Topicus: In cooperation with a very competent developer we delivered a faultless database merge/conversion for the client, using an expanded version of the tool quickly developed for Arkin. This allowed for a comprehensive automated database conversion test. Show less



GGD Haaglanden

• Hospitals and Health Care
• 1 - 100 Employee

• Java Developer

  • Nov 2010 - Feb 2011

  An automated extraction tool for several databases, belonging to three merging organizations for a migration between two systems. This involved successfully extracting and transforming all necessary data with maximum consistency. Roughly 40.000 dossiers and several hundred thousand records were converted to a new specification. Java, JDBC, SQL An automated extraction tool for several databases, belonging to three merging organizations for a migration between two systems. This involved successfully extracting and transforming all necessary data with maximum consistency. Roughly 40.000 dossiers and several hundred thousand records were converted to a new specification. Java, JDBC, SQL



eBay

• United States
• Technology, Information and Internet
• 700 & Above Employee

• Tester

  • Mar 2010 - Oct 2010

  QA and (automated) Tester for Hippas.nl QA and (automated) Tester for Hippas.nl



Innovam | De grootste opleider in mobiliteit

• Netherlands
• Automotive
• 100 - 200 Employee

• Automated Performance Tester

  • Apr 2009 - May 2010

  Functional testing Automated functional testing Performance testing Most importantly found and helped solve 200 concurrency/deadlock error locations within the application Functional testing Automated functional testing Performance testing Most importantly found and helped solve 200 concurrency/deadlock error locations within the application



NWO (Dutch Research Council)

• Netherlands
• Research Services
• 500 - 600 Employee

• Performance tester

  • Sep 2009 - Sep 2009

  Creation and execution of JMeter performance test. Further technical analysis of systems in order to find bottlenecks. Creation and execution of JMeter performance test. Further technical analysis of systems in order to find bottlenecks.



The European Library

• The Hague Area, Netherlands

• Tester

  • Mar 2009 - Sep 2009

  (Automated) Testing for www.theeuropeanlibrary.org (Automated) Testing for www.theeuropeanlibrary.org



Arkin

• Netherlands
• Mental Health Care
• 700 & Above Employee

• Database Conversion Tester

  • Jun 2009 - Jun 2009

  Saw an opportunity for quick gains using automation. Designed and implemented a conversion comparison tool with automated reporting. Tested 25.000 records as opposed to the original hundred, found 185.000 bugs, Saw an opportunity for quick gains using automation. Designed and implemented a conversion comparison tool with automated reporting. Tested 25.000 records as opposed to the original hundred, found 185.000 bugs,



Studentalent

• Netherlands
• Staffing and Recruiting
• 1 - 100 Employee

• Uitzendkracht

  • 2006 - Nov 2008

  Multiple positions including administration, representative work and service industry. Also, Technical helpdesk at Telfort and data-entry at Conquaestor. Automating the latter led to position at Furore Multiple positions including administration, representative work and service industry. Also, Technical helpdesk at Telfort and data-entry at Conquaestor. Automating the latter led to position at Furore