Curriculum vitae

Henricus Louwhoff
Email: henricus@louwhoff.org
Birthday: 1982
Languages
- Dutch (ILR Level 5 – Native proficiency)
- English (ILR Level 4 – Full professional proficiency)
Info
In my 20+ years of being a developer, I have written software in many different languages, built and maintained large-scale production systems and lead multilingual, in-house and remote teams as CTO.
Work Experience
Chief Technology Officer (2019-current)
J&S Services
- Building a product aggregator platform for multiple marketplaces and webshops (200M+ products, 2TB+ database) (Elixir/PostgreSQL)
- Building an order aggregator and processor platform for multiple marketplaces and webshops (EUR 60k+/day) (Elixir/PostgreSQL)
Chief Technology Officer (2015-2019)
Just in Ten
During this time, I was working for an investment company with the following responsibilities:
- Giving technical advice for new and current projects and companies
- Setting up the IT department
- Programming the initial MVP or helping set up the final product
Novatargeting
- Building a user re-targeting system for the affiliate market (Python/DynamoDB)
- Building an automated bidding system (Elixir/PostgreSQL)
MVP Digital
- Building the backend for a proxy network (Elixir/PostgreSQL)
- Building the hardware nodes for the proxy network (RaspberryPI)
MyMobia
- Giving advice for building an affiliate marketing CMS (Ruby/RethinkDB)
- Building a broadcast text message system (Elixir/PostgreSQL)
Advalley
- Setting up the IT department by moving outsourced work in-house
- Building a new hotel reservation system (Ruby/MySQL)
Chief Technology Officer (2014-2015)
Clickdealer
- Being in charge of tracking system and campaigns (PHP/MySQL)
- Building new tracking system for campaigns (PHP/MySQL)
Senior Software Developer (2013-2014)
SEOshop (Lightspeed)
- Maintaining the legacy e-commerce platform (PHP/Percona)
- Building a new e-commerce platform to replace the legacy platform (PHP/Percona)
Chief Technology Officer (2010 - 2013)
SD&P Global
- Being in charge of day-to-day IT operations, planning, and management
- Designing new web/mobile products and services (PHP)
PHP Programmer (2010 - 2013)
SD&P Global
- Maintaining front-end/back-end systems (PHP/MySQL)
- Developing new front-end/back-end systems (PHP/MySQL)
- Creating and maintaining B2B API connections (PHP)
- Developing products and systems with international Payment API's (PHP)
- Developing products and systems with international Mobile Billing API's (PHP)
- Being in charge of technical assistance for international Affiliate partners/networks (PHP)
Web programmer (2009 - 2010)
Interveste Groep BV
- Building and maintaining internal web-based products and services (PHP/MySQL)
Groupware Engineer (2008 - 2009)
Staffplanning groep
- Building and maintaining internal Lotus Notes databases and applications (Lotus Notes)
Designer (2004 - 2009)
Freelance
- Designing and developing websites and web applications (PHP/MySQL)
Webspecialist (2000 - 2008)
IT Construction Company BV
- Designing client websites (Lotus Notes)
- Building client templates for use in company's CMS (Lotus Notes)
Personal projects
PECAN (2017 - current)
Elixir, PostgresSQL, CoackroachDB, ElasticSearch, Nginx, Kubernetes
Phoenix E-Commerce API-first Node build as an umbrella app:
pecan
- business logic layer (Ecto)
pecan_api
- API layer (GraphQL)
pecan_pay
- payment gateway layer
pecan_web
- routing layer (Phoenix)
Sites
Technical
Skills
Language |
Years |
Elixir |
5 |
Ruby |
4 |
PHP |
6 |
SQL |
10 |
NoSQL |
4 |
JavaScript |
3 |
Typescript |
0,5 |
Education
Eduvision (2008)
PHP Professional
- Certificate PHP Professional
Koning Willem I College (1997 - 2000)
System Engineer