Jochem Kuijpers

I presented an experimental study at SSDBM'19 based on my research internship at Neo4j in 2018. The full paper is published by ACM in their Digital Library.

SSDBM'19 is the 31st International Conference on Scientific and Statistical Database Management.

I integrated a new type of index into the Neo4j query pipeline. This change affected the full query pipeline; query planning, query execution and transaction processing (index maintenance).

I also looked into which type of query and data patterns best benefited this type of index to speed up query performance and found some useful heuristics for finding use-cases that can be sped-up with this index.

An experimental study on querying recursive (context-free) path patterns in graph databases. I examined existing literature, built a prototype, ran experiments, evaluated performance and presented the results in a final report.

This internship was done with supervisors from both Neo4j and Eindhoven University of Technology.

This study was expanded and published in SSDBM'19 in July 2019.

Courses include:

• Advanced, Geographic and Geometric Algorithms (three separate courses)
• Database Technology
• Data Engineering
• Visualization
• Simulation in Computer Graphics
• Foundations of Data Mining

I graduated at the Database Group. My thesis project was completed in collaboration with Neo4j.

I received study credits for an internship abroad at Neo4j in Malmö, Sweden.

I joined this legal services start-up before the product was launched, to build the website with a small team.

My responsibility was to build a responsive front-end website on modern technologies, according to the designs and connect it to the back-end system using a RESTful API.

Technologies:

• Front-end: HTML5, LESS, Angular 4, TypeScript
• Back-end: MariaDB, MySQL, PHP 7, nginx
• Tools: NPM, Docker, git

The website has been revised since I have worked on it.

I helped Telegram users with their questions regarding the app and platform. This included troubleshooting and triaging bug reports and feature requests, and escalating relevant issues to the appropriate internal teams.

I also suggested new ideas for the platform and made an early Android prototype for user-configurable themes, which led to the feature being implemented across all official apps.

I maintained administrative tools (Delphi) and various websites (PHP) as a freelance programmer with a small team of other students. I also used MySQL and SVN.

The website has been re-designed since I have worked on it.

Elective courses:

• Computer Graphics
• Artificial Intelligence
• Human Technology Interaction
• Web Technology
• Web Analytics

Minor in Security:

• Legal and Technical aspects of IST
• Algebra for Security
• Introduction to Cryptology

My major is called Software Science and has emphasis on theoretical computer science and software engineering.

Full-time summer job for about 4-6 weeks each year, as an order picker in a semi-automated industrial electronics warehouse.

Elective subjects:

• Economics
• Advanced Mathematics ('Wiskunde D')