Hi! I'm Xander

I’m a 𝐒𝐞𝐧𝐢𝐨𝐫 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 with over 25 years of experience specializing in building fast, scalable, and user-centric web applications.

My core expertise lies in 𝐑𝐞𝐚𝐜𝐭, 𝐓𝐲𝐩𝐞𝐒𝐜𝐫𝐢𝐩𝐭, and 𝐍𝐞𝐱𝐭.𝐣𝐬. I focus on creating high-quality, accessible interfaces with excellent performance and clean architecture.

With a solid background at IBM and diverse projects, I also bring experience in Java, Kotlin, and GoLang. This full-stack perspective enables me to collaborate effectively across teams and deliver more robust solutions.

I’ve successfully worked with startups and enterprises across marketing, finance, sales, and retail industries — consistently delivering pragmatic, high-impact results.

I’m currently open to new opportunities where I can contribute to ambitious products alongside strong engineering teams. Let’s connect if you’re building something exciting.

My work

Bol.

Jul 2025 - Mrt 2026

• React

• Typescript

• react-router

• Storybook

• vitest

• Kotlin

• GraphQL

Frontend Developer

At Bol, we migrated from a tightly coupled legacy frontend/backend to a modular NX-based React frontend using TypeScript, React Router, Vitest, and Storybook. Our team owns the Account domain, covering orders, returns, and customer settings. I also consolidated fragmented Java/Kotlin business logic into a single service, Aloha, responsible for the order status.

The Happy Doctor

Feb 2025 - Mei 2025

• Design

• UX

• Wix Studio

• CSS

• Javascript

• SEO

• Marketing

Frontend Developer

Using Wix Studio, developed and designed a dynamic, user-friendly website, https://www.thehappydoctor.nl, leveraging Wix and its robust CMS to deliver a responsive, visually appealing design with seamless database integration and optimized SEO functionality. Handling marketing to grow online reach and interaction.

Gain.pro

Mei 2023 - Aug 2024

• React

• TypeScript

• Go

• SQL

• MUI

• Google Cloud

Frontend Developer

In my second term at Gain.pro, I focused on maintaining and optimising the APP and CMS while developing key data integrations using GoLang. I built import pipelines to integrate data from DealRoom into Gain.pro and implemented export solutions to seamlessly transfer Gain.pro insights into DealCloud customer environments.

Action

Okt 2021 - Jan 2023

• React

• Next.js

• Vercel

• Apollo GraphQL

• Algolia

• Tailwind CSS

Frontend Developer

At Action.com, we upgraded the tech stack by migrating from a Vue.js application with an EPI Server CMS hosted on Microsoft Azure to a React-based app leveraging Apollo Federation for communication. The new setup runs on Vercel while retaining the existing CMS and integrating Algolia for enhanced search and sorting capabilities.

Rabobank

Jan 2021 - Aug 2021

• React

• D3.js

• AWS

• Tailwind CSS

• Serverless

• DynamoDB

• Storybook

Frontend Developer

I developed www.raboelectric.nl for Rabobank, a platform promoting electric vans for small to medium-sized businesses. The website features an intuitive subsidy and financial lease calculator, helping businesses make informed decisions. Built with React and a serverless architecture powered by DynamoDB, it ensures scalability, performance, and seamless user experience.

NTR

Okt 2020 - Dec 2020

• React

• Next.js

• JSON

• css-modules

• framer motion

• Storybook

Senior Frontend Developer

For NTR, we developed NPOkennis.nl, a dynamic platform featuring videos, stories, series, polls, and quizzes to engage and educate users. Designed for seamless content delivery, the website enhances storytelling and interactivity.

Gain.pro

Apr 2019 - Sep 2020

• React

• Redux

• RxJS

• D3.js

• JSON-RPC

• css-modules

• Storybook

Lead Frontend Developer

At Gain.pro, a startup providing deep insights into the private equity market, I was part of a small, agile team of four, building their new website and CMS from the ground up. We leveraged React, Redux, and D3.js to create a high-performance, data-driven platform for financial professionals.Tech stack: React,

Ahold

Okt 2016 - Mrt 2019

• React

• Redux

• RxJS

• Next.js

• PWA

• JavaScript

• Docker

• Kubernetes

Senior Frontend Developer

Contributed to the development of AppieToday.nl, Ahold’s video platform, and created various promotions and widgets for AH.nl. My last project was the redesign of Allerhande.nl, enhancing the user experience for one of the Netherlands' most popular recipe platforms.

Info.nl

Apr 2016 - Sep 2016

• JavaScript

• jQuery

• Sass

• Java

• Srping

• Mockitoy

• Rest

• MVN

Frontend Developer

At Info.nl, I worked on the Greenwheels project, enhancing their REST API to support a new mobile app that seamlessly integrates multiple applications into one. This upgrade improved performance, scalability, and user experience for car-sharing services.

Ahold

Sep 2012 - Mrt 2016

• JavaScript

• Backbone

• jQuery

• Sass

• HTML5

• NPM

• Grunt

• Bower

Lead Frontend Developer

As Lead Developer at Ahold, I managed a team of 10+ front-end developers across multiple teams, driving the development of key e-commerce platforms, including AH.nl, AH.be, and Etos.nl. Focused on scalability, performance, and UX, we delivered high-impact digital experiences for millions of users.

ING

Okt 2011 - Jul 2012

• Java

• Mockito

• SQL

• JSP

• JSTL

• JavaScript

• CSS

• Jfreechart

Senior Java Developer

I created a new Web service for their exiting Vortex Credit Risk system and extended the Risk Rater Web Application with multiple screens using Jfreechart.

Mirabeau

Dec 2010 - Mei 2011

• Java

• JavaScript

• HTML5

• Apache Camel

• jQuery

• Spring

• Hibernate

Senior Java Developer

At Mirabeau I helped build the vakgilde.nl website from scratch. Building multiple use cases including setup of the database and services to the contract and vacature modules.

Quince

Mei 2010 - Jul 2010

• JavaScript

• jQuery

• jQuery UI

• HTML

• CSS

• Grails

• Groovy

Frontend Developer

I was asked to fix 2 major problems with the Vamos KPN mobile sales Web application. First was the speed of the website, second was the layout of the website.

Fortis

Jul 2009 - Nov 2009

• Java

• J2EE

• JSP

• Spring

• SQL

• CSS

• JavaScript

• SQL

Senior Java Developer

Solon project at Fortis was the migration of old and very old code of multiple web application to the newly chosen Windows environment.

Net Effect

Sep 2008 - Feb 2009

• Java

• JSP

• JSTL

• SQL

• CSS

• JavaScript

• jQuery

• Spring

• Jfreechart

Frontend Developer

European Directories wanted a new sales tool for their employees. This included building multiple web portlets and export functionality of different report to PDF.

Work

Clients