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Arjan Van Der HulstAV

Arjan Van Der Hulst

(Lead) Backend Developer

€650/day
Amsterdam, NL
15+ years

Average response time: 1 hour

About Arjan

Senior backend developer met 20 jaar ervaring in PHP, Symfony en Laravel. Ik bouw en optimaliseer schaalbare backend-systemen, REST API's en complexe koppelingen tussen applicaties, met PostgreSQL en MySQL als vertrouwde basis.

Mijn specialisatie ligt in systeem- en ERP-integraties. Ik heb onder meer koppelingen gebouwd met Twinfield, Exact Online en AFAS, en weet wat er nodig is om data betrouwbaar tussen systemen te laten stromen. Daarnaast zet ik Python en moderne AI-tooling (function calling, n8n) in om processen te automatiseren en handmatig werk te verminderen.

Als (lead) backend developer combineer ik diepgaande technische kennis met het overzicht om teams en projecten aan te sturen. Ik werkte onder meer in de verzekerings-, e-commerce- en mediasector.

Waar ik het verschil maak: stabiele, onderhoudbare code, snellere systemen en integraties die fouten en handwerk wegnemen. Beschikbaar voor opdrachten in en rond Amsterdam (tot 50 km) en remote.
  • Dutch

    Native or bilingual

  • English

    Fluent

Can work on-site
Amsterdam (up to 50km)

Experience

  • Inshared
    Freelance (Lead) Backend Developer
    BANKING AND INSURANCE
    June 2020 - Today (6 years)
    Leusden, Netherlands
    • • Performance improvement. Due to technical debt multiple queries (some of which were over 700 lines of SQL) took anywhere from 3-30 minutes. I've been able to refactor those queries, resulting in an execution time of less than a minute.
    • • Create a machine learning model to detect fraud.
    • • Added automatic payment of applicable Home and Household claims, so they don't have to be processed manually by employees
    • • Develop a new animal insurance product, with automatic processing and payment of claims.
    • • Connected / implemented several API's:
    ◦ o HCAI (Canadian platform that handles health insurance claims)
    ◦ o CompanyInfo (provides an UBO check, which is used to check if persons and companies which are recipients of a payment are not members of a criminal organisation or on a terrorism list)
    ◦ o HIS: A German organisation where insurers need to report claims and claimants for InShared Germany.
    PHP PostgreSQL Symfony API REST ERP
  • CHALET.NL
    Freelance Developer
    TRAVEL AND TOURISM
    October 2019 - May 2020 (7 months)
    Woerden, Netherlands
    Chalet.nl is a winter sports agency specialized in chalets and apartments for 2 to 50 people. I’m part of a
    team of 6 responsible for porting the old backoffice based on PHP 5.4 to a new backoffice that is driven by
    PHP 7 and Symfony 4.3.
    Tasks:
    • Identifying and porting features from unstructured code to OOP PHP 7 code.
    • Optimizing SQL Queries
    Symfony PHPUnit MySQL API REST ERP
  • IFS EUROPE
    Senior Developer
    AUTOMOBILE
    January 2019 - March 2020 (1 year and 2 months)
    Lelystad, Netherlands
    IFS Europe is responsible for the sales and support of General Motors vehicles outside the US. For IFS I have rewritten the old Order Management Systeem (OMS). The original system was written in (not object oriented) PHP 5 and MySQL. This OMS is being used by employees and dealer to amongst others manage and place orders, campaigns and recalls.
    MySQL PHP Symfony API REST PHPUnit

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Education

  • HAVO
    Herbert Vissers College
    2002
    HAVO
  • MBO ICT Niveau
    ROC
    2006
    MBO ICT Niveau

Skill set

Categories