Niels Heisterkamp
Freelance Full Stack Engineer at IKEA
Hillegom, South Holland, Netherlands
Summary
👤
Senior🎓
Top SchoolNiels Heisterkamp is a pragmatic freelance Full Stack Engineer from the Netherlands with over a decade of hands-on experience building cloud-native, containerised systems and developer-friendly APIs. He combines strong backend expertise in Node.js, TypeScript, PostgreSQL and GraphQL with front-end experience in React, delivering end-to-end solutions for clients like IKEA and GrandVision. A former lead architect and head of development at a fast-growing RegTech startup, he has shepherded migrations to microservices, CI/CD and Kubernetes while keeping legacy platforms running. Niels is comfortable across DevOps, serverless and Azure/AWS ecosystems and has implemented production email/SMS workflows and federated GraphQL gateways. He also contributes to open source—adding LaTeX export functionality to the widely used mathjs library—illustrating attention to core-library detail beyond product work. Colleagues describe him as an effective communicator who makes complex problems simple and rapidly prototypes pragmatic business-focused solutions.
12 years of coding experience
17 years of employment as a software developer
VWO natuur en techniek, VWO natuur en techniek at Atheneum College HageveldBSc Psychology (not completed), BSc Psychology (not completed) at Leiden UniversityBSc Mechanical Engineering (not completed), BSc Mechanical Engineering (not completed) at Delft University of Technology
English, Dutch
Stackoverflow
735reputation
68kreached
18answers
0questions
momentjs
top-5%
Github Skills (26)
javascript10
evaluation10
expressions10
mathematics10
math10
eval10
evaluator10
latex10
expression10
testing9
nodejs9
momentjs9
service-worker6
html6
offline-caching6
Programming languages (3)
Github contributions (5)
josdejong/mathjs
May 2014 - May 2014
An extensive math library for JavaScript and Node.js
Role in this project:
Back-end Developer
Back-end DeveloperContributions:6 commits in 2 days
Contributions summary:Niels contributed to the `mathjs` library by implementing LaTeX conversion functionality for mathematical expressions. Their work involved adding and modifying code within the `lib/util/latex.js` and `lib/expression/node` directories, indicating a focus on core mathematical functionality. This included mapping symbols, functions, and operators to their LaTeX equivalents and adding tests to validate the conversions. The user also addressed issues and refactored code related to the LaTeX conversion process.
mathmatricesbignumbersmathematical-expressionsnode-js
Governance-com/docker-sencha
Jul 2016 - Nov 2018
Contributions:7 pushes, 3 branches, 4 tags in 2 years 4 months
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