Wim van der Zijden
Verified Expert in Engineering
Software Engineer and Developer
Twello, Netherlands
Toptal member since November 26, 2019
As a former senior software development engineer at AWS, Wim specializes in building full-stack applications in the cloud that scale from 0 to millions of users, leveraging AWS's robust and scalable infrastructure to ensure high availability and performance. Additionally, Wim has broad expertise encompassing system design, SQL and no-SQL databases, and front-end development, making him a versatile and comprehensive full-stack developer.
Portfolio
Experience
- React - 6 years
- AWS SDK - 6 years
- AWS CloudFormation - 6 years
- AWS Cloud Development Kit (CDK) - 6 years
- Amazon Web Services (AWS) - 6 years
- TypeScript - 6 years
- Node.js - 6 years
- Amazon API Gateway - 6 years
Availability
Preferred Environment
Git, Linux, Visual Studio Code (VS Code), Figma, AWS SDK
The most amazing...
...project I've worked on was building a completely new AWS service from scratch: Amazon Monitron.
Work Experience
Senior Front-end Engineer
Amazon Web Services (AWS)
- Led the UX team for Amazon Monitron on the technical side, tasked with all UX components of Amazon Monitron: web/Android/iOS app and the AWS Management console for Amazon Monitron.
- Communicated with leadership on strategy and long-term vision for Amazon Monitron.
- Collaborated with UX designers and product managers to conduct a UX operational readiness review.
Software Development Engineer II
Amazon Web Services (AWS)
- Designed initial architecture for Amazon Monitron, a then-new AWS service for predictive maintenance.
- Designed and implemented the DynamoDB database structure and handling code for Amazon Monitron.
- Designed and implemented the Amazon Monitron web, Android, and iOS apps.
- Designed and implemented the AWS Management Console for Amazon Monitron.
Software Development Engineer I
Amazon
- Built a guided buying plugin in Datapath for Amazon Business.
- Customized the cart page on Amazon.com to display guided buying badges.
- Helped develop the policy evaluator for the Amazon business' guided buying functionality.
Software Engineer
ActFact
- Created a REST API platform on an ERP system to make it suitable for developing REST APIs.
- Developed an Android app as an alternate UI to an ERP system.
- Built, from scratch, invoice recognition software to import PDF invoices into an ERP system.
- Constructed a business logic evaluator with ANTLR for validation fields within an ERP system.
- Developed a shipping cost calculator based on real-time shipping data for a webshop that can efficiently handle the partial matching of postal codes.
- Built a "Rainmodule" in AngularJS: After answering several questions, the system would calculate what kind of system and products they need and create a quote in the backing ERP system.
- Created, from scratch, a module to import and export UBL invoices into an ERP system.
- Made several webshops on top of an ERP system, using and extending the module WebCMS.
- Led the development of a customization module to make an ERP system suitable for use by construction companies.
- Built custom business intelligence and SQL reports for customers.
Experience
Amazon Monitron App
https://app.monitron.awsInvoice Recognition System
In the case of PDF, OCR was used to extract the text. I developed an algorithm for extracting the most critical data from plain text: an identifier of the business partner in the ERP system and the line and total amounts, with and without VAT.
UBL is an XML standard for invoices. I leveraged JAXB code generation for this import to simplify writing the import logic in Java.
AA 1942 Calculator
https://aa1942calc.comIt is a very popular tool amongst the top players of this game. The calculator has about 2.5k monthly active users.
Education
Master of Science Degree in Computer Science
University of Twente - Enschede, Netherlands
Bachelor's Degree in Business IT and Management
Saxion University of Applied Sciences - Deventer, Netherlands
Skills
Libraries/APIs
React, REST APIs, Node.js, HTML5 Web Workers, JAXB, AWS Amplify
Tools
Git, AWS SDK, AWS CloudFormation, AWS Cloud Development Kit (CDK), Amazon CloudFront CDN, Amazon Simple Queue Service (SQS), Amazon Simple Notification Service (SNS), Cordova Plugins, ANTLR, Figma
Languages
SQL, TypeScript, JavaScript, CSS, HTML, Java, Python, UML, GraphQL
Frameworks
Redux, Material UI, Next.js
Paradigms
Declarative Programming, REST, Imperative Programming, Functional Programming, Business Process Modeling Notation (BPMN), Change Management, Database Design, Secure Code Best Practices
Platforms
Amazon Web Services (AWS), AWS Lambda, Linux, Android, Visual Studio Code (VS Code), iOS, Docker
Storage
MySQL, Amazon DynamoDB, Amazon S3 (AWS S3), JSON, Databases
Other
Writing & Editing, Amazon API Gateway, Web App Development, APIs, Web Development, Back-end, Cordova, Web Scraping, Website Data Scraping, Information Systems, Algorithms, Information Retrieval, Modeling, Software Development Management, Requirements & Specifications, Big Data Architecture, Tesseract, Single Sign-on (SSO)
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