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Olivier De JongOD

Olivier De Jong

Fullstack Software Engineer

€680/day
Amsterdam, NL
8-15 years

Average response time: 1 hour

About Olivier

I help founders and product teams ship serious software, from validating an idea with an MVP to scaling a production-grade SaaS that holds up to real users.

8+ years as a senior full-stack engineer, twice as the first full-time engineer at a startup (B2B SaaS, B2B fintech). I've taken products from 0→1, led architectural overhauls, and stayed through the scale-up phase to teams of 80+. I think in systems, care about code other engineers can read, and translate business problems into technical decisions.

What I usually deliver
- MVPs taken from 0 to 1, ready to be used by your clients
- Refactors and architectural overhauls
- Greenfield Laravel APIs with proper testing, typing, and observability from day one
- Full-stack feature work
  • English

    Native or bilingual

  • Dutch

    Native or bilingual

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

Experience

  • Finstack
    Fullstack Software Developer
    DIGITAL AND IT
    May 2023 - Today (3 years and 2 months)
    Amsterdam, Netherlands
    Founding engineer at a B2B fintech SaaS, scaling the product from early-stage MVP to large-scale, production-ready platform over 3+ years. Codebase, infrastructure, and engineering culture were largely shaped during this period.
    • Led a full client-side rewrite from Vue 2 to Vue 3, modernizing ~30 screens with Composition API, Pinia, and TypeScript — eliminating accumulated technical debt from the MVP and setting the foundation for the next stage of growth.
    • Migrated frontend hosting from Netlify to a Terraform-managed AWS CloudFront setup, introducing infrastructure-as-code and strict GitOps practices that brought version control and reviewability to the previously untracked infrastructure layer.
    • Contributed across the Laravel backend on feature work, architectural refactors, and reliability improvements.
    • Operated as a true full-stack engineer with extras. Owning frontend, backend, infrastructure, and DevOps, while contributing on UI/UX decisions and product scoping alongside the founding team.
    VueJS Laravel Typescript DevOps Amazon Web Services
  • Vesper
    Fullstack Software Developer
    DIGITAL AND IT
    October 2020 - April 2023 (2 years and 6 months)
    Amsterdam, Netherlands
    Founding engineer at a B2B SaaS that grew from 5 to 80+ employees during my 2.5 years. Took the product from MVP to a large-scale, production-ready platform.
    • Main focus was shipping features, refactors and bugfixes in both the front- and backend projects.
    • Identified that the backend's growing complexity needed a new architectural foundation. Pitched and shaped a year-long DDD refactor that the team committed to and executed, methodically migrating the codebase to bounded contexts.
    • Contributed to a full client-side rewrite from Vue 2 to Vue 3 (~30 screens), adopting Composition API, Pinia, and TypeScript to eliminate MVP-era technical debt and modernize the frontend architecture.
    • Operated as a true full-stack engineer across Laravel and Vue: feature work, refactors, performance fixes, and the architectural conversations that came with rapid team growth.
    Laravel VueJS Typescript MySQL Amazon Web Services
  • Sterrk
    Fullstack Software Developer
    DIGITAL AND IT
    October 2019 - October 2020 (1 year)
    Amsterdam, Netherlands
    Started my engineering career at a digital agency, beginning with a 6-month traineeship in modern web development before stepping into shipping production work for early-stage founders.

    • Owned 2–3 MVPs end-to-end for early-stage founders, working directly with them to translate business problems into shipped products on tight timelines.
    • Developed deep familiarity with the Laravel ecosystem and learned to talk business with founders and translate it into technical decisions.
    JavaScript PHP MySQL Laravel VueJS

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Education

  • Bachelor of Science
    Universiteit Utrecht
    2019
    Bachelor of Science
  • Physics and Astronomy
    Universiteit Utrecht
    2015
    Physics and Astronomy

Skill set

Categories