Kornelis Sietsma
Principal Engineer at John Lewis Partnership
England, United Kingdom
Summary
🤩
Rockstar🎓
Top SchoolKornelis Sietsma is a Principal Software Engineer with 15 years of experience helping organisations design resilient systems and delivery models across financial services, healthcare, telecoms, media and the public sector. He blends hands-on polyglot engineering (Java, C#, JavaScript/TypeScript, Rust, Clojure, Scala) with team design, developer experience and technical strategy, regularly stepping into roles from Staff Engineer to interim Head of Engineering. Known for practical use of research-driven practices (Accelerate/DORA) and Team Topologies, he has led everything from small R&D teams to large, multi-year transformations and time-critical regulatory projects delivered early through pragmatic technology choices. Comfortable in both on-prem and fully remote contexts, he also champions diversity and equity as core drivers of better outcomes. A tinkerer at heart, he built a software-visualization tool used by colleagues to understand large codebases, reflecting a curiosity for tooling that improves everyday engineering work.
15 years of coding experience
2 years of employment as a software developer
B.Sc. Computer Science, B.Sc. Computer Science at Monash University
Stackoverflow
2,008reputation
89kreached
14answers
6questions
clojure
top-5%
Github Skills (200)
excel10
xls10
scanner10
spreadsheet10
xlsx10
container10
code-metrics10
clojure9
verify9
command-line-tool9
husky9
openxml9
configurations9
exceptions9
git-hooks9
Programming languages (13)
Github contributions (5)
kornysietsma/cloc2flare
Mar 2018 - Jul 2020
Contributions:2 releases, 4 pushes, 1 branch in 2 years 4 months
kornysietsma/d3-react-demo
Jul 2020 - Aug 2022
Demo of using D3 and React together nicely
Contributions:1 review, 1 PR, 6 pushes in 2 years 1 month
reactd3js
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.