Denis Cornehl
Selbstständiger IT-Berater Und Entwickler
Berlin, Germany
Summary
🤩
RockstarDenis Cornehl is a Berlin-based software architect and independent IT consultant with over 14 years of professional experience and a software career dating back to 2000. He blends hands-on backend and database engineering with leadership experience as CTO and VP of Software Engineering, currently shaping architecture at Thermondo while freelancing. Denis is passionate about Python and Rust, cloud platforms like Heroku, and improving developer tooling—evidenced by contributions to notable open-source projects such as docs.rs and the eza modern ls alternative. His work often focuses on pragmatic quality improvements (timezone-aware timestamps, query indexing, clearer parsing) that boost performance and user experience. Colleagues value him for delivering durable, data-aware systems and for quietly improving developer workflows across languages and stacks.
14 years of coding experience
6 years of employment as a software developer
Stackoverflow
4,142reputation
229kreached
109answers
0questions
django-models
top-5%
django
top-5%
heroku
top-5%
django-rest-framework
top-1%
Github Skills (42)
database-migrations10
postgresql10
plugin-development10
formatting10
schema-design10
language-server-protocol10
text-formatting10
neovim10
lua10
language-server10
django-rest-framework10
database-design10
parse10
db-schema10
database-schema10
Programming languages (20)
Github contributions (5)
rust-lang/docs.rs
Dec 2020 - Jan 2023
crates.io documentation generator
Role in this project:
Back-end Developer & Database Engineer
Back-end Developer & Database EngineerContributions:678 reviews, 310 commits, 982 PRs in 2 years 1 month
Contributions summary:Denis's commits primarily focused on improving the `docs.rs` documentation generator's database interaction and performance. They migrated timestamp fields to timestamptz, ensuring timezone awareness, and optimized database queries by adding indexes for key columns. The user also made several code changes related to database schema migrations. These changes enhanced the database schema and functionality of the `docs.rs` project.
rustcrates-iodocumentation-generatorcrates
jose-elias-alvarez/null-ls.nvim
Oct 2021 - Sep 2022
Use Neovim as a language server to inject LSP diagnostics, code actions, and more via Lua.
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:4 reviews, 9 commits, 8 PRs in 10 months
Contributions summary:Denis primarily contributed to the `null-ls.nvim` project by implementing new features, fixing bugs, and updating metadata related to language server integrations. They added new diagnostics capabilities for `curlylint` and `pydocstyle`, extended support for `deno_fmt`, and fixed issues related to `sqlfluff` integration. Furthermore, the user modified existing functionality of the project, improving progress reporting. These changes indicate involvement across different aspects of the project, including integration and core functionality.
luavimlspneoviminject
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