👋 Hi, I’m Andre Jilderda,
Experienced front-end developer who moves your project forward
With my background in design and front-end development, I build solid websites and web applications that feel good to use and look great. With the experience I’ve gained from countless projects, big and small, I set the direction, contribute hands‑on, and make sure everything runs smoothly. Curious what I can do for your project? Let’s connect!
15+ years of online experience as a developer & designer
Whether it’s scalable code or smoother teamwork, I help projects move forward with quality, focus and a sense of fun.
Clean, scalable and future-proof code
I mainly work with Astro, React and TypeScript, building applications that are fast, stable and enjoyable to use. Clean, efficient and well-tested code is the foundation. Performance, accessibility and reusable components are second nature to me. With my design background I translate designs effortlessly into code and give them that extra
*At the moment I’m not taking on Angular assignments, sorry!
Enjoyable teamwork
I’m a front-end developer who likes to make both processes and teamwork run smoother. As a certified scrum master I know the ins and outs of agile, but I stick to what works best for the team in practice. Whether it’s refining requirements, writing user stories or gathering input, I step in where it helps most. For me, it’s all about working together with a sense of fun, and getting better results along the way.
I’ve worked on more than 150 websites for great organizations 👌
From international startups to large organizations such as the Dutch Railways and VodafoneZiggo.
- Lead front-end developer, freelance
- 9292 REISinformatiegroep, Utrecht
- June 2023 – August 2025
- Astro, TypeScript, React, Vitest, Storybook, Tailwind CSS and more
- Tooling
Astro, TypeScript, React, Vitest, Storybook, Tailwind CSS and more
- Work & responsibilities
- Set up new front-end architecture for 9292.nl, focusing on speed, scalability and future-proofing,
- Building the Journey Planner – the core of 9292 that millions of travelers use monthly to plan their trips,
- Developing other website functionalities such as station information, real-time departure times, subscription advisor, content pages and more,
- Setting up a flexible design system in Storybook to increase productivity and consistency,
- Writing unit and component tests with Vitest and Storybook to ensure stability,
- Connecting to a headless CMS for easy content management,
- Mentoring three developers and together establishing a positive, proactive team culture,
- Met both deadlines and ensured everything went live on time and without stress,
- Nominated for Website of the Year in the category Mobility.
- Senior front-end developer, freelance
- Shell Renewables and Energy Solutions, Rotterdam
- November 2022 – June 2023
- TypeScript, React, GraphQL, Apollo Server, Testing Library/Jest, Storybook, styled‑components
- Tooling
TypeScript, React, GraphQL, Apollo Server, Testing Library/Jest, Storybook, styled‑components
- Work & responsibilities
- Developing features for an internal application built with React, TypeScript & GraphQL for managing Proofs of Sustainability from renewable energy sources, among other things,
- Reducing tech debt and improving code quality,
- Writing unit and integration tests,
- Creating user stories and streamlining the development process,
- Mentoring a fellow developer,
- Within an international agile Scrum team.
- Senior front-end developer, freelance
- CloudNatix, Silicon Valley (US) - Remote
- August 2021 – July 2022
- TypeScript, React, Testing Library/Jest, Cypress, Storybook, styled‑components, REST API's
- Tooling
TypeScript, React, Testing Library/Jest, Cypress, Storybook, styled‑components, REST API's
- Work & responsibilities
- Developing a complex React application with a lot of interaction and state. Think of dashboards, filters, server settings, data visualizations and communicating with APIs,
- Expand the design system and document new components in Storybook,
- Writing unit, integration and E2E tests,
- Front-end lead for the planning and development of several new features,
- Work in an agile Scrum team of 4 senior front-end developers.
- Lead front-end developer @ team Conversion rate optimisation, freelance
- Nederlandse Spoorwegen, Utrecht
- October 2019 – August 2021
- JavaScript, TypeScript, Angular, RxJS, Jest, REST API's, Alpine.js, HTML, CSS/Sass, eslint, Webpack + Babel, Handlebars, Relay42, Git, Bamboo, Azure, Figma
- Tooling
JavaScript, TypeScript, Angular, RxJS, Jest, REST API's, Alpine.js, HTML, CSS/Sass, eslint, Webpack + Babel, Handlebars, Relay42, Git, Bamboo, Azure, Figma
- Work & responsibilities
- A/B-testing: develop new features and optimisations throughout the entire NS-website,
- Developed a wizard that helps consumers and business users decide on what subscription best fit their needs (single page Angular 10 app),
- JavaScript tooling and libraries to make it easier to setup and develop A/B-tests,
- Develop, optimise and maintain new page-templates for subscriptions and business context,
- Helped the team to improve the development process and code quality,
- So, how much extra conversion did this bring in? Loads. ;)
- Interim-scrum master for a period of 2 months.
- Designer & front-end developer, freelance
- VodafoneZiggo, Utrecht
- Mei 2018 – oktober 2019
- JavaScript, HTML, CSS/Sass, Adobe Experience Manager, Jenkins, Webpack, een vleugje Vue 2 + Jasmine + Cypress, Webpack + Babel, Git, Sketch, Figma, Photoshop
- Tooling
JavaScript, HTML, CSS/Sass, Adobe Experience Manager, Jenkins, Webpack, een vleugje Vue 2 + Jasmine + Cypress, Webpack + Babel, Git, Sketch, Figma, Photoshop
- Work & responsibilities
- Migration of Vodafone's Internet of Things platform to a new content management system with a modern front-end stack,
- Design and implementation of the new Vodafone Smarter Working proposition,
- Facilitating design system workshops for designers, developers & copywriters. Goal: developing more consistent digital products in less time.
- Senior visual designer, front-end development team‑lead & Scrum Master
- Angi Studio, Den Haag
- September 2012 – June 2018
- JavaScript, jQuery, Handlebars, Fractal, Gulp, HTML, CSS/Sass, Figma, Sketch
- Tooling
JavaScript, jQuery, Handlebars, Fractal, Gulp, HTML, CSS/Sass, Figma, Sketch
- Work & responsibilities
- As a senior visual design and/or front-end developer involved in large online projects for Greenchoice, Municipality of the Hague, Sanoma, NEN, Triodos Bank, Reed Business International, International Business Cards, et al..
- As front-end development team-lead responsible for improving the multidisciplinary workflow and quality.
- Setup reusable pattern libraries in Fractal,
- Design & front-end development combined with scrum master role.
- Lead visual designer & front-end developer
- iWink, Groningen
- May 2010 – September 2012
- JavaScript, jQuery, HTML, CSS, SVN
- Tooling
JavaScript, jQuery, HTML, CSS, SVN
- Work & responsibilities
- As lead visual designer and/or front-end developer responsible for design and/or development of over 60 websites for Festival Zwarte Cross, Gasunie, Martiniplaza, Bevrijdingsfestival Groningen et al..
- Design & development of e-mailtemplates for inhouse tool
- Design and create animations in Adobe Premiere & After Effects,
- Dutch Interactive Awards nominee in the category 'best Corporate website' for redesign gasunie.nl
- Visual designer & front-end developer
- Koenencom CMCR, Appingedam
- June 2009 – April 2010
- jQuery, HTML, CSS
- Tooling
jQuery, HTML, CSS
- Work & responsibilities
- Front-end development,
- UX- & visual design,
- Implement content management systems,
- Consulting, project management and offline DTP activities.
- Web Designer & front-end developer
- Landstra & De Groot, Appingedam
- July 2008 – January 2009
- jQuery, HTML, CSS
- Tooling
jQuery, HTML, CSS
- Work & responsibilities
- Website design,
- Front-end development
- Implement CMSs based on ASP.NET.
Education
- Graphic design (Bachelor's degree)
- Royal Academy of Art (KABK), The Hague (NL)
- 2012 – 2016
- Communication, Multimedia & Design, specialisation 'Brand- & Designmanagement' (Bachelor's degree)
- Hanze University of Applied Sciences, Groningen (NL)
- 2005 – 2009
Certificates
- Scrum Master Advanced Training
- Scrum Academy
- April 2016
- Professional Scrum Master I (PSM1)
- Scrum.org
- December 2015
- Scrum Master in interactive projects
- Scrum Academy
- January 2015
- What I do
- Front-end developer (primary), designer & scrum master
- Languages
- TypeScript, JavaScript, HTML, CSS
- Frameworks
- React, Astro,
AngularAt the moment I’m not taking on Angular assignments, sorry! - Tooling
- Vite, Storybook, Vitest, Playwright, Turborepo and more
🔍 These are just a few of the technologies I’ve worked with. Looking for something specific? Just ask!
Seven things you might want to know about me
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Right now I’m taking on limited work, but I always find a way for the right projects. Feel free to get in touch and we’ll see what’s possible!
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Depending on the assignment I work hourly or on a project basis. What fits best depends on the context. Feel free to get in touch so I can get a clear sense of what’s needed and whether I’m the right fit for your project.
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I’m a hands‑on type and love trying out new techniques and tools, so I tend to pick things up fast. Need very specific skills? Drop me a line and we’ll see if I can help.
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A few years ago I swapped the Randstad for the green city of Arnhem. Too far from your office? No worries, I’m used to working remotely. And if a hybrid setup works better (for example a few days a week on-site), that’s no problem either.
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I did, both the design and the build. I studied Graphic Design as well as Communication & Multimedia Design, but these days I mainly work as a front-end developer. The nice thing is that I can seamlessly bring design and code together.
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This site has gone through a few iterations. The first version was built with Eleventy, later I switched to Next.js for a better developer experience. These days the site runs on Astro: a framework that’s a much better fit for simple, fast landing pages like this one. By default it ships zero JavaScript, has lazy loading out of the box and feels light and fast. I also used Astro for the landing page of Dash. The few interactive elements on this page are built with Alpine.js, since React would be overkill here. That’s why you’ll see some
x-binds and other attributes in the HTML, that’s Alpine.js at work. -
I love trail running in the beautiful surroundings of Arnhem, hit the gym, play indoor soccer and go mountain biking. I also play football every week as a volunteer with young people with mild intellectual disabilities. I practice meditation and, whenever I can, work on one of my hobby projects (like Dash, a plugin for Figma) or contribute to open source code. Yeah, I know it sounds like work, but I basically turned my hobby into my job. ;)
Looking for a front-end developer to move your project forward? Call me or send me a message, I'm always up for a good chat.
Registered at the Netherlands Chamber of Commerce under number 89978072.