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Martijn JongkindMJ

Martijn Jongkind

Senior Software Engineer (Typescript, React)

€760/day
Nieuw Vennep, NL
15+ years

Average response time: 1 hour

Freelancer profile translated to English.
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About Martijn

I have been working as a front-end web developer since 2000 and have witnessed the rise and fall of Internet Explorer. The companies I have worked for range from startups, internationals (KLM, DHL), and everything in between, and I feel comfortable everywhere.

My "weapon of choice" is React, which I have been using for over 7 years now, recently combined with TypeScript.

Besides building a web application, I can also contribute to:
  • Contributing to product ideas
  • Mentoring junior developers
  • Building a (scrum) team
  • Scrum master tasks
  • Hackathons
  • Dutch

    Native or bilingual

  • English

    Fluent

Can work on-site
Nieuw Vennep (up to 50km)

Experience

  • CloudNatix
    Senior Front-end/React Developer
    July 2021 - November 2022 (1 year and 4 months)
    Build a web application to manage resources like clusters, workloads and users across cloud platforms (AWS, Google, Azure, on-premise). Give insights in cost and utilization and show recommendations to optimize services and save money. Worked with a small group of Dutch react developers for this American startup. Stack: Typescript, React, Carbon Design System, Victory Graphs, Styled Components, Storybook, Internationalization, react-query, Jest (unit tests), Cypress (end-to-end tests + component testing), Sentry (application monitoring), RESTAPI with microservices backend (Golang).
  • T-Mobile
    Senior Front-end Developer
    September 2019 - August 2020 (11 months)
    Worked together with the Design/UX team and different tech teams to migrate Tele2.nl into the T-mobile tech stack. Focus on creating a shared Design System with modular and composable components using brand specific styling with minimal implementation differences. Stack: Typescript, jQuery, Razor templates (.net), D3 visualization library, Storybook, Cypress (end-to-end tests).
  • Fashiontrade
    Lead Front-end/React Developer
    April 2016 - July 2019 (3 years and 3 months)
    FashionTrade.com is a b2b ecommerce startup for global fashion brands and retailers. As the first developer, started building a prototype with React to form the vision for the product. This turned into the actual platform connecting to microservice backends on Google Cloud. Also responsible for onboarding new front-end developers. Stack: Typescript, React, Redux (state management) with Normalizr, Styled Components, Storybook, Internationalization, Jest (unit tests), Cypress (end-to-end tests), Sketch, Zeplin, RESTAPI with microservices backend (Java).

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Education

  • Hogere Informatica opleiding (HIO)
    Hogeschool van Amsterdam
    1998

Skill set

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