Jens Krause
Independent Software Developer (Blockchain) at jkrause.io
Lübeck, Schleswig-Holstein, Germany
Summary
🤩
Rockstar🎓
Top SchoolJens Krause is an independent software developer and blockchain engineer with over two decades of coding experience and more than 11 years focused on professional contributions to decentralized systems. Based in Lübeck, Germany, he combines deep Haskell and Rust backend expertise with front-end work in PureScript, Vue and TypeScript, having shipped components for projects like Cardano's explorer and FOAM's geospatial TCR. Jens has architected p2p solutions using libp2p and prepared DAG implementations for Substrate, and contributed UI/UX improvements to the popular Rust TUI library ratatui, showing a rare blend of protocol-level and terminal-facing design work. His open-source footprint (github.com/sectore) reflects sustained, practical contributions across cryptographic currency tooling, wallets and explorer APIs. Colleagues value him for turning research-grade ideas into deployable PoCs and production integrations, often bridging functional-language backends with modern web frontends.
11 years of coding experience
2 years of employment as a software developer
1. Staatsexamen (First State Examination), Education, Sport, History, 1. Staatsexamen (First State Examination), Education, Sport, History at University of Hamburg
German, English
Stackoverflow
94reputation
2kreached
7answers
0questions
Github Skills (25)
tui10
widgets10
back-end-development10
apidoc10
terminal-emulator10
terminal-application10
api10
blockchain10
terminal-ui10
rust10
api-design9
apim9
ux-design9
ui-design9
database-design9
Programming languages (26)
Github contributions (5)
input-output-hk/cardano-sl
Dec 2016 - Mar 2018
Cryptographic currency implementing Ouroboros PoS protocol
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1000 commits, 83 PRs, 233 pushes in 1 year 3 months
Contributions summary:Jens's contributions primarily focused on modifying and adding features to the Cardano SL explorer's backend, specifically related to transaction processing. They implemented new routes for fetching data, including genesis addresses and their history, and also modified existing API endpoints. They extended the core functionalities by integrating database and transaction-related data. Additionally, the user worked on enhancing the user interface by integrating changes in various views, like the transaction and blocks views.
cardanocryptographyposadacryptographic
ratatui/ratatui
Oct 2023 - Jan 2025
A Rust crate for cooking up terminal user interfaces (TUIs) 👨🍳🐀 https://ratatui.rs
Role in this project:UI/UX Designer & Frontend Developer
UI/UX Designer & Frontend DeveloperContributions:1 review, 1 PR, 3 comments in 1 year 3 months
Contributions summary:Jens focused on enhancing the user interface and user experience within the ratatui TUI framework. Their contributions involved adding features like customizable tab dividers and refining the appearance of existing widgets, specifically the `Tabs` and `LineGauge` widgets. The user also addressed documentation and example code to improve usability and ensure compatibility with the CI/CD pipeline. The user's work directly impacts the visual presentation and configurability of terminal user interfaces built using the ratatui library.
craterustterminaltuicli
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