Mark Sellings
Documentation Manager
England, United Kingdom
Summary
🤩
Rockstar🎓
Top SchoolMark Sellings is a Documentation Manager and senior technical/UX writer based in England, with a multi-decade track record of shaping developer and customer documentation for enterprise platforms. He has led docs-as-code transformations and API reference programs at companies like Thermo Fisher, Boomi, and Camunda, combining Docusaurus, Git, Azure DevOps, ReDoc and DITA workflows to modernize content and integrate it into engineering CI/CD. Known for turning legacy WordPress and monolithic help systems into structured, developer-friendly platforms, he also brings hands-on UX, graphics and CSS skills that make complex APIs approachable. He mentors junior writers and drives documentation standards, release notes and cross-team tooling decisions that measurably improve developer onboarding and product adoption. An award-winning technical communicator, he pairs an English & Classical Studies background with practical web and e-learning development experience dating back to the early web era. Quietly pragmatic, he often bridges the gap between product teams and developers by embedding documentation into sprint processes rather than treating it as an afterthought.
2 years of coding experience
15 years of employment as a software developer
A-Levels, English, History, Sociology, A, B, B, A-Levels, English, History, Sociology, A, B, B at Harlow CollegeBA (Hons), English & Classical Studies, 2:1, BA (Hons), English & Classical Studies, 2:1 at King's College London
English, German, French
Github Skills (21)
java10
camunda10
bpmn10
orchestration-framework10
microservices10
grpc10
documentation10
workflow-engine9
zeebe9
modeling-tool7
identity7
desktop-application7
connectors6
openshift6
k8s5
Programming languages (4)
Github contributions (5)
camunda/camunda-docs
Jul 2024 - Jul 2026
Camunda 8 Documentation, including all components and features
Contributions:121 releases, 1060 reviews, 441 PRs in 1 year 11 months
camunda
camunda/camunda
Sep 2024 - Feb 2026
Process Orchestration Framework
Contributions:18 reviews, 16 comments, 2 issues in 1 year 5 months
orchestration-frameworkmicroservicesworkflow-enginejavabpmn
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