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Jona HalffmanJH

Jona Halffman

Software engineer \ Next.Js, VBA & Marketing

€480/day
Rumst, BE
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Jona

I have personally built countless websites & web apps for every budget. Sometimes alone, and sometimes with a self-assembled team of 2 to 8 people.

I work for small businesses as well as multinationals: Mondelez, Pfizer, etc.

As a civil engineer, I always like to maintain broad knowledge & expertise, which sometimes goes very deep.

With my diverse background as a startup founder, I have filled various roles in all sorts of young companies & corporates:
- Web developer Next.Js & Node
- Data scientist
- Recruiter
- Independent advisor
- Automation engineer
- Digital marketing & growth-hacker
- UX/UI with Figma

My main specialty is in Next.Js, but my favorite projects are those where I can combine knowledge from different domains.

Projects with a real challenge and great people. Those are always the best, of course.
  • Dutch

    Native or bilingual

  • English

    Fluent

Can work on-site
Rumst (up to 40km), Arrondissement Brussel-Hoofdstad (up to 15km), Arrondissement Mechelen (up to 40km), Lier (up to 15km), Arrondissement Antwerpen (up to 30km)

Experience

  • Elektrotechnieker.be
    Own platform: 100% custom work order application
    CIVIL ENGINEERING
    July 2022 - Today (4 years and 1 month)
    Rumst, Belgium
    Create a work order application for white goods technicians in Belgium with a minimal budget.

    Using MUI template: https://minimals.cc/

    - Multilingual i18n
    - Time-tracking
    - Invoicing
    - User-friendly
    - Parts ordering & follow-up
    - Communication synchronization with photos and replies.
    - Signing of orders
    - Manufacturer login
    - Automatic tariff calculation
    Next.js Vercel Material Design Figma Project Management NestJs SQL
  • De Kamer van Volksvertegenwoordigers
    Saving & documenting lost knowledge
    PUBLIC SECTOR
    March 2022 - Today (4 years and 5 months)
    Brussel, Belgium
    Improved 45,000 XML metadata regulations with Node script. Resolved bugs in
    legacy Coldfusion system for administrative team
    Coldfusion XML Node.js
  • Lanark
    Digital supply chain engineer - VBA automations & legacy RPA
    LOGISTICS AND SUPPLY CHAIN
    September 2021 - Today (4 years and 10 months)
    Antwerpen, Belgium
    Provided Mondelez with BI analytics for workforce planning and 11 VBA
    automations to save 3 FTE workdays per week.
    Ultimo VBA Microsoft Excel Microsoft Power BI SQL AS/400 SAP Power Apps

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Education

  • Civil Engineering: Computer Science, Electronics & Business Administration
    KU Leuven
    2020
  • Industrial Sciences - Highest Distinction
    PTS Boom
    2016

Skill set

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