Simon de Lang
DevOps Engineer at rr-wfm
The Netherlands
Summary
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RockstarSimon de Lang is a DevOps engineer based in the Netherlands with 11 years of experience building reliable infrastructure and developer workflows. He combines hands-on DevOps practice with a strong open-source mindset, contributing as a full-stack developer to notable projects like Stryker-JS where he led a TypeScript migration and refactoring of core mutation logic. Comfortable across CI/CD, automation and codebase modernization, he focuses on practical improvements that reduce technical debt and enable faster, safer deployments. Colleagues know him for translating legacy patterns into typed, maintainable code while keeping developer ergonomics in mind.
11 years of coding experience
Stackoverflow
1,416reputation
88kreached
31answers
11questions
Github Skills (19)
javascript10
typescript10
object-oriented-programming10
mutation-testing10
typescript-types10
typescripts10
refactor9
refactoring9
babeljs8
babel68
architectures8
babel-core8
architecture8
eclipse6
sql-server6
Programming languages (16)
Github contributions (5)
stryker-mutator/stryker-js
Feb 2016 - Oct 2022
Mutation testing for JavaScript and friends
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:23 releases, 42 reviews, 427 commits in 6 years 9 months
Contributions summary:Simon primarily contributed to refactoring and migrating the Stryker-JS project to TypeScript. They replaced constructor functions with TypeScript classes, fixed import statements, and converted various mutation classes (BaseMutation, ConditionalBoundaryMutation, MathMutation, RemoveConditionalsMutation, ReverseConditionalMutation, and UnaryOperatorMutation) to TypeScript. Their work involved modifying the base operator mutation class to an abstract class, fixing parameter calls, and removing deprecated features such as the ES5 mutator.
avatest-automationmutationmutation-testingjavascript
simondel/sonar-buildbreaker-vsts
May 2018 - Oct 2021
VSTS task to break your build when you failed the quality gate
Contributions:11 releases, 20 commits, 1 PR in 3 years 5 months
gatevstsfailedvscodebreak
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