Johan Dorland
Software Developer at Topicus
North Holland, Netherlands
Summary
🤩
Rockstar🎓
Top SchoolJohan Dorland is a pragmatic software developer with 10 years of experience building backend systems and supporting platform operations across finance and edtech companies in the Netherlands. He holds a Cum Laude Bachelor's and a Master's in Computer Science from Universiteit Utrecht and has practical DevOps experience onboarding teams to Kafka clusters and maintaining Java services. Currently at Topicus after a multi-year engineering role at Iddink Group, Johan combines production-focused development with a strong grounding in algorithms and systems from his academic tutoring background. He contributes to open-source—having implemented core features and precision fixes in the well-regarded gojsonschema project—demonstrating attention to correctness and dependency hygiene. Colleagues rely on him for dependable, detail-oriented solutions that bridge operational needs and robust software design.
10 years of coding experience
4 years of employment as a software developer
Bachelor's degree, Informatica, Cum Laude, Bachelor's degree, Informatica, Cum Laude at Universiteit Utrecht
Dutch, English
Github Skills (9)
go10
json-schema10
apidoc9
api9
algorithms8
data-structures8
algorithm8
data-structure8
testing7
Programming languages (5)
Github contributions (5)
xeipuuv/gojsonschema
Dec 2017 - Oct 2019
An implementation of JSON Schema, draft v4 v6 & v7 - Go language
Role in this project:
Back-end Developer
Back-end DeveloperContributions:3 releases, 30 commits, 51 PRs in 1 year 9 months
Contributions summary:Johan implemented core functionalities for the JSON Schema implementation, focusing on features such as ID parsing and reference resolution. Their contributions included changes to `schema.go`, `schema_test.go`, `schemaPool.go`, `subSchema.go`, and `schemaReferencePool.go`, suggesting a deep understanding of the project's internal workings. They also addressed rounding errors by utilizing `math/big.Rat` instead of `float64` and upgraded dependencies.
json-schemago-languagejson
johandorland/gojsonschema
Dec 2016 - Oct 2019
An implementation of JSON Schema, draft v4 - Go language
Contributions:38 pushes, 18 branches in 2 years 9 months
golangjsonschemago-languagejson-schemajson
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