About

Work Experience

• Open source blockchain developer, Ergo

  Mar, 2021 - Present

  Responsible for blockchain Consensus and Settlement layer (peer-to-peer networking, off-chain/on-chain synchronization, mempool, handling miners - block candidate generation and validation) while playing with Computational layer built on top of Sigma protocols and ErgoScript.

  • Scala, Akka, Blockchain, ...

• Open source blockchain explorer/analyzer developer, Ergo uExplorer

  Sep, 2022 - Present

  Supplementary ergo chain explorer/analyzer with Cassandra backend, rapid indexing speed, UTXO state, hot address statistics, JanusGraph, plugin framework, GraphQL api, etc.

  • Scala, Akka, Cassandra, JanusGraph, GraphQL, Blockchain, ...

• Senior software engineer, Globalwebindex

  Jan, 2015 - Apr, 20216 years 3 months

  I was an engineer hired for boostrapping a company branch specializing on anonymous and GDPR compliant internet user tracking, which means distributed data processing, analyzing and structuring terabytes of data from billions of impressions into meaningful representation

  • Scala, Akka, ScyllaDb, Druid, Kubernetes, ...

• open source dev, Mawex

  Jan, 2016 - Jan, 20193 years

  Lightweight library for distributed task scheduling based on Master Worker Executor model.

  • scala, akka

• open source dev, Saturator

  Jan, 2016 - Jan, 20193 years

  Finite State Machine that is satisfying dependencies within partitioned/layered directed acyclic graph until it is fully saturated.

  • scala, akka

• open source dev, Replayed

  Jan, 2015 - Jun, 20155 months

  A tool for writing and managing markdown documents - becoming collaboration/specification/documentation app for PM

  • scala.js, Monifu, ScalaTags, uPickle, uTest, bootstrap

• open source dev, Postfix Deliverability Analytics

  Jan, 2015 - Jun, 20155 months

  Postfix Mass Mail log processing tool, mining reasons of bounced messages for newsletter analytics

  • scala, akka, MapDB

• open source dev, Scalajs Rx IDb

  Jan, 2015 - Jun, 20155 months

  DBMS for IndexedDB engine, based on Rx principles (type safety, resilience, backpressure, user friendly (reduces all Idb CRUD features to 4 API methods)

  • scala.js, Monifu, uPickle, uTest

• open source dev, Scalajs Gremlin Client

  Jan, 2015 - Jun, 20155 months

  Gremlin-Server client with ad-hoc extensible, reactive, typeclass based API allowing for using turing complete graph traversal language gremlin to query graph databases from browser

  • scala.js, reactive-websocket, Monifu, uPickle, uTest

• open source dev, Reactive Websocket

  Jan, 2015 - Jun, 20155 months

  Very light websocket server and browser client based on Rx principles

  • scala.js, scala, java-websocket, Monifu, uPickle, uTest

• open source dev, Scala.js keyboard polyfill

  Jan, 2015 - Jun, 20155 months

  Improves keyboard event handling experience in hostile browser environment and allows for avoiding onpress events that are cross-browser incompatible and soon to be deprecated

  • scala.js

• Senior software engineer, FG Forrest

  Jan, 2012 - Dec, 20142 years 11 months

  Mass Mailing service development

  • Scala, Akka, MapDB, ...

• Startup founder, 

  Jan, 2011 - Dec, 201111 months

  Joins demand (people, companies) with supply (professional translators) (hibernated due to lack of business skills)

  • Built on top of Liferay portal as a few complex plugins

  • Java

• Software developer, Komix

  Jan, 2009 - Dec, 20101 year 11 months

  Software integration of Schengen Information System with Czech Law enforcement

  • Mission critical piece of software and high security measures

  • JavaEE, Spring framework

Skills

Education

Interests