Hi, nice to meet youI'm Jesse

I'm Jesse van der Velden, a 24 year old developer from The Netherlands šŸ‡³šŸ‡±.

As a Full Stack Developer, my passion is to not only create excellent technical solutions, but also to thoroughly understand the problem and create solutions that best serve the end-users. Because in the end we create software for people, not for computers.

When I'm not coding I'm probably out with friends, doing CrossFit or out for a walk while wandering in my own thoughts, podcasts or audiobooks.


About me - Experience

As I began working besides my study (BSc. technical computer science at the University of Twente), over the years I have learned a lot about ins and outs of Web Applications from programming and architecture to design & infrastructure.

See also more details on my LinkedIn

Yes Development
Owner/ Freelance Full-Stack Developer
I work on and off as a freelancer with my own company where I build and manage or contributed to some B2B Web Application projects. Some highlights:
  • Investing calculator for new housing projects in The Netherlands
  • Employee evaluation survey tool for an SME consultancy company
  • Registration/ training class sign up web app for the student CrossFit association alongside my year as a volunteer board member.
Software Engineer
Worked part-time besides my study at Cofano, which develops software solutions in the logistics field with clients in the Port of Rotterdam, and Amsterdam Schiphol Airport.
  • Helped to introduce TypeScript and code generation for GraphQL
  • Created a React Native app that tracks flower shipments, which received a design award from my university
  • Developed new features using tools like Java Spring Boot, PostgreSQL, Hibernate, and React & TypeScript for the front-end
Junior Developer
I contributed to several web applications using PHP & Laravel as a part-time developer besides my study.
  • Improved internal monitoring and tracking of issues of customers
  • Contributed to with several projects of several SMEs
  • Designed & maintained several custom WordPress websites
  • Helped with improving the deployment process to Apple AppStore
Along the way I have gained extensive experience in the following technologies:
  • JavaScript, TypeScript (Node.js)
  • Java
  • Python
  • PHP
  • PL/pgSQL
  • Objective-C
Back-end Tech
  • Spring Boot & Hibernate
  • Docker
  • Kubernetes
  • Next.js
  • Laravel
  • GraphQL servers
  • Express.js
  • WordPress
Front-end Tech
  • HTML5 + CSS3 + JS
  • React & React Native
  • GraphQL clients
  • TailwindCSS
  • PostgreSQL
  • Redis
  • MySQL
  • SQLite
  • MongoDB
Data Science
  • Python Jupyter lab/ notebooks
  • Numpy
  • R and Matlab

Open-Source pojects & contributions

I've first started with open-source during my high-school years where I developed an easy PHP API for better web app to access online education materials.

Since then, I have benefited a great deal from the open-source community, so I like to give back as well when possible. I do that by developing things that I find useful, and releasing it to the rest of the world, where it will hopefully also help other people.

Here I highlight some of my own (šŸ™Œ) and my contributions (šŸ™) to other open-source projects:

You can find all of my open-source work on my Github

My own project. It's an (old) iOS 8 - 10 Jailbreak tweak with more than 25 000 downloads that I made as I was tired of the default iOS' folder actions. Made in Objective-C (with Logos JB hook) and learned a lot about the iOS ecosystem and reverse-engineering.

Learn more ā†’

PgTyped is cool library to use raw SQL in TypeScript with type-safety for PostgreSQL.
I contributed by adding Support SCRAM-SHA-256 authentication šŸ”‘, fixed a bug šŸž, and I am in the process to add nullability overrides.

Learn more ā†’

As I needed a way to see what was going on on my iPhone for my Jailbreak tweak, I improved a command line tool for log messages from iOS devices: added extra filters, simulator support and support for colored log messages šŸŒˆ. Made in C.

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Postgraphile is a Node.js Server library to quickly add a GraphQL API server using PostgreSQL as its schema. I contributed to this project by adding to Windows support to the Next.js - Postgraphile starter.

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My own Python project. It's a Telegram bot that I made to help me with my financial affairs. As soon I make a payment, I get a message on Telegram to categorize it, and it puts it in my Google Sheet for budgeting.

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As a poor High-School student I wanted to tinker around iOS, but couldn't afford a Macbook. Therefore, I wrote guides and made an installer for a Hackintosh installation on my old laptop. Fortunately, I have a Macbook now, so I can focus my time on other cool projects!

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Even this website is open-source!