Systems and protocol engineer in Ostrava, Czechia. I build the layer underneath — consensus, cryptography, storage engines, P2P networking — and the tooling that keeps large estates observable. Twelve years of Python, increasingly Rust.
bismuth — the first blockchain protocol and platform written from scratch in Python. In development since 2015, fair-launched on 1 May 2017 with no ICO and no premine, in continuous production ever since. Full node stack: P2P networking, SQLite ledger with schema migrations, block and transaction validation, mining, wallets, explorers, REST APIs — plus the Hypernode second layer and the "Crystals" plugin system behind on-chain tokens, aliases, a DEX, and cross-chain bridges to Ethereum and BSC.
nado — a phone-mineable, fair-launch, post-quantum chain. Proof-of-work's hash race is replaced by a deterministic, beacon-keyed weighted draw: one hash decides each block's producer, so faster hardware confers no advantage and there is nothing to grind. ML-DSA-44 (NIST FIPS 204) signatures in pure Python with a byte-compatible JavaScript implementation, so a zero-install browser page — wallet, miner, explorer, and alias manager at once — reproduces every address and transaction ID bit-for-bit. A STARK-proven execution layer (field-native zkVM) carries on-chain games, shielded transfers, and end-to-end-encrypted messaging.
Testnet-stage alpha — not mainnet-launched. The alphanet rerolls as consensus changes land. Run it at your own risk; don't secure value of consequence with it yet.
- Kučera, J., Hovland, G. — Tail Removal Block Validation: Implementation and Analysis. Modeling, Identification and Control 39(3), 2018. First author; deployed to the live Bismuth mainnet, cutting block times over 190 s from 5.4% to under 1% of blocks.
- Hovland, G., Kučera, J. — Nonlinear Feedback Control and Stability Analysis of a Proof-of-Work Blockchain. MIC 38(4), 2017. Cited in IBM patent US 10,880,073.
| speech-splitter | Whisper + YAMNet pipeline turning raw recordings into Hugging Face-ready TTS training datasets. Produced the Czech corpora behind the Chatterbox-TTS-Czech fine-tune. |
| ollama-batch-processor | Qt GUI for batch LLM pipelines — translation, chunking, chained operations. |
| videer | FFmpeg/AviSynth+ encoding GUI with QTGMC deinterlacing and CUDA. |
| dynatrace-mass-management | Self-hosted Tornado portal for bulk operations across many Dynatrace tenants via the API. |
| screen-monitor · mandatum | Rust client/server systems for Windows fleets: live screen monitoring and remote task execution. |
| sshauto | Automate repetitive SSH tasks — a lightweight alternative to Ansible. |
- firmostat.cz — Czech companies database aggregating 1M+ records from ARES and the Commercial & Insolvency Registers into PostgreSQL; scrapers plus REST API.
- slopinky.cz — auto-translated Czech current-events encyclopedia, built on an RSS/Trends ingestion and headless-Claude editorial pipeline (draft / review / translate).
Eight-plus years of enterprise observability engineering for global manufacturing and government clients — Dynatrace, CheckMK, Nimsoft/Ekara across estates of roughly 15,000 hosts.
bismuth.cz · nadochain.com · LinkedIn · kucera@protonmail.com