Niels Leenheer - Co-founder And CTO at Salonhub

Niels Leenheer

Co-founder And CTO at Salonhub

Opende, Groningen, Netherlands

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Summary

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Rockstar

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Top School

Niels Leenheer is a UX-focused frontend engineer and Co-founder/CTO with 15 years of experience building polished interfaces and web applications. He combines formal training in computer science and graphic design to bridge visual design and pragmatic frontend engineering, with deep expertise in HTML, CSS, JavaScript and PHP. As CTO of Salonhub and a UX consultant at Sights he ships customer-facing products and refines interactions for web and mobile, including Adobe AIR and iPhone webapps. An active open-source contributor, he enhanced the EscPosEncoder project with multilingual (Hanzi) codepage support, raw printer commands and optimized QR code features for receipt printers — a niche but impactful example of solving real-world integration problems. Based in the Netherlands, he’s known for turning browser quirks and UI complexity into intuitive, production-ready experiences.

15 years of coding experience

10 years of employment as a software developer

Hogere Informatica Opleiding, Hogere Informatica Opleiding at NHL Hogeschool

Grafische vormgeving, Grafische vormgeving at Kunstacademie Minerva

Stackoverflow

Stats

21reputation

9kreached

1answer

0questions

Github Skills (19)

javascript10

node-js10

decode10

decoding10

javascripts10

encoding10

encode10

utf-89

codegeneration9

code-generator9

qr-codes9

code-generation9

qr-code9

code-gen9

base648

Programming languages (9)

TypeScriptC++BikeshedCJavaScriptPHPObjective-CHTML

Github contributions (5)

NielsLeenheer/EscPosEncoder

Nov 2017 - Jul 2021

Create a set of commands that can be send to any receipt printer that supports ESC/POS

Role in this project:

Back-end Developer

Contributions:5 releases, 34 commits, 16 PRs in 3 years 8 months

Contributions summary:Niels contributed to the development of the `escposencoder` project, which focuses on generating commands for receipt printers. They added support for various features, including Hanzi-based codepages (Simplified Chinese and Japanese), italic text, and text alignment. Furthermore, the user implemented the ability to include raw printer commands and optimized the QR code functionality.

poszplescposprinteresc

nursit/WhichBrowser

Oct 2014 - Mar 2015

Contributions:11 commits in 5 months

sniffingagentuser-agent

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