Henricus Louwhoff

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

• http://github.com/hl
• https://elixirforum.com/u/hlx
• https://henricuslouwhoff.com

Technical

Skills

Education

Eduvision (2008)

PHP Professional

• Certificate PHP Professional

Koning Willem I College (1997 - 2000)

System Engineer

• Diploma System Engineer