About P2P.Systems

P2P.Systems was co-established in July 2017 by Adam Kotucha, Jacek Sieradzki, Tomasz Korwin-Gajkowski, Tomasz Kurowski, and Wojciech Kwiatek as a General Partnership. Our initial co-operation commenced in early 2017 while working on the project of organizing the very first blockchain meetups in Krakow – Crypto@Cracow. With the passage of time, the idea has became one of the most attended Krakow’s technology speaker-series event. Based on these experiences, our p2p.systems team of professionals with a mixed area of expertise has been born.

P2P.Systems – Areas of Expertise

P2P.Systems is a place where blockchain technologies become practical daily solutions.
We value excellence of our services, so do we appreciate full satisfaction of our clients.
The team provides expert set of thorough skills and knowledge
in blockchain technology fields with no exception.



We are a team coming from different backgrounds like law, IT and finances.
We have a common interest in Bitcoin / Cryptocurrencies / Blockchain / Distributed Ledger Technology / Smart Contracts. Our goal is to popularize and exchange ideas about these new emerging technologies. Feel free to join us!
Slack: cryptocracow.slack.com
Meetup: meetup.com/Crypto-Cracow/
Facebook Group: facebook.com/groups/153326791858075/


Adam Kotucha

Adam Kotucha

Legal consultant

Director of the Legal Department in Herkules S.A. GPW, associate in the Law Firm Schiffer Sroczyński sp. j., member of the Supervisory Board in PGMB Budopol S.A., political activist - founder of the Direct Democracy Party. Co-founder of Crypto@Cracow - the biggest blockchain-related meetup group in Poland.

Jacek Sieradzki

Jacek Sieradzki

Business consultant

IT Business Analyst with a broad experience in the Finance IT technology projects. Blokchchain, Fintech and Crypto Currencies enthusiast. Co-founder of Crypto@Cracow - the biggest blockchain-related meetup group in Poland. Privately a fan and an adept of martial arts.

Tomasz Korwin-Gajkowski

Tomasz Korwin-Gajkowski

Software Consultant

Software developer. Currently works for Mercedes and also as a cryptocurrency, DLT/Blockchain consultant. Previously worked for Lord, Abbett & Co. LLC - an independent, privately held investment manager. Co-founder of Crypto@Cracow - the biggest blockchain-related meetup group in Poland. Member of the “Blockchain/DLT and digital currencies” workgroup lead by the Polish Ministry of Digital Affairs.

Tomasz Kurowski

Tomasz Kurowski

Business consultant

A financial professional with over 5 years of practical experience in agile project/change management, business analytics, and training analytics across fund accounting, custody, financial reporting and transfer agency areas. Enterprise blockchain supporter and disseminator. Co-founder of Crypto@Cracow - the biggest blockchain-related meetup group in Poland.

Wojciech Kwiatek

Wojciech Kwiatek

Software Consultant

A Blockchain evangelist, database developer, Austrian Economics enthusiast and Cryptocurrency Asset Manager investor. Has a wide knowledge of the history of economic thought. A macroeconomics and blockchain writer for an investment magazine. Co-founder of Crypto@Cracow - the biggest blockchain-related meetup group in Poland.

Janusz Nowakowski

Janusz Nowakowski

Blockchain consultant

Cloud engineer, entrepreneur. Technology passionate. IT professional, over 15 years of experience. Delivering projects for big corporations and startups



Portfolio of our successful events

Crypto@Cracow #1 – Blockchain Introduction (20.03.2017)

Crypto@Cracow #2 – Enterprise Blockchain: IBM’s Perspective (Maciej Jedrzejczyk as a guest, 26.04.2017)

Women in Technology #43 Krakow – Blockchain and Cryptocurrencies Basics (23.05.2017)

IV Digital Money and Blockchain Forum Warsaw (01.06.2017)

Crypto@Cracow #3 – Ethereum:Introduction (08.06.2017)

Crypto@Cracow #4 – Blockchain Technology Based on NEM (Bartlomiej Sanak) (19.07.2017)

Crypto@Cracow #5 – Blockchain & Cryptocurrency Fundamentals (24.08.2017)

Brown Brothers Harriman – Consultation for an Investment Bank (10.09.2017)

Crypto@Cracow #6 – Rozwoj Blockchain w Polsce – wyklad otwarty prof. K. Piech (21.09.2017)

Krakowski Park Technologiczny – Blockchain&Cryptocurrencies (07.10.2017)

Crypto@Cracow #7 – Prawo a Blockchain i Kryptowaluty (26.10.2017)

Blockchain & Cryptocurrency Fundamentals – StartKRKUp (28.10.2017)

Polska Grupa Energetyczna – Consultation for an energy sector company – blockchain in energetics (30.10.2017)

Brown Brothers Harriman, Spark Conference 2017 (09.11.2017)

IT Academy J-Labs – Blockchain and Cryptocurrencies (14.11.2017)

Cracow University of Economics – Blockchain Open Lecture (16.11.2017)

FXParkiet Webinar – Cryptocurrencies and Capital Markets (16.11.2017)

Crypto@Cracow #8 – Hyperledger@Cracow – Open Lecture by Marta Piekarska (23.11.2017)

Crypto@Cracow #8 – Hyperledger@Cracow – DevWorkshop by Maciej Jedrzejczyk (24.11.2017)


Blockchain & Cryptocurrency Fundamentals – StartKRKUp

One of the most innovative and disruptive technologies in the world today is ‚blockchain’ and the cryptocurrencies built on this decentralized platform. Watch the Crypto@Cracow community at BiznesLab as they went over the fundamentals (28.10.2017): Agenda: 1. What are cryptocurrencies and blockchain? 2. What is the motivation behind the technology? 3. How does it work? […]

Crypto@Cracow #7 – Law Status of Blockchain and Cryptocurrencies

Crypto@Cracow #7, that took place on the 26th of October, was fully focused on legal aspects of the blockchain. We invited four different layers who covered different legal aspects of the emerging DLT/Crypto technologies. The speakers Marcelina Szwed-Ziemichód, Adam Kotucha. Dr Paweł Opitek. and Jacek Czarnecki. Video from the event is under the below link A […]


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Blockchain FAQ

We realize that knowledge is power, that is why, we have prepared a short jargon glossary to introduce you to the world of blockchain.

What is blockchain?

Blockchain – is a continuously growing list of records, called blocks, which are linked and secured using cryptography. Each block typically contains a hash pointer as a link to a previous block, a timestamp and transaction data. By design, blockchains are inherently resistant to modification of the data. A blockchain can serve as an open, distributed ledger that can record transactions between two parties efficiently and in a verifiable and permanent way. The blockchains can be either public (bitcoin) or private (enterprise).

What is a cryptocurrency?

Cryptocurrency is a digital asset designed to work as a medium of exchange using cryptography to secure the transactions and to control the creation of additional units of the currency. Cryptocurrencies are classified as a subset of digital currencies and are also classified as a subset of alternative currencies and virtual currencies. The very first cryptocurrency was bitcoin, the others are often called as altcoins.

What is bitcoin?

Bitcoin is a worldwide cryptocurrency and digital payment system called the first decentralized digital currency, as the system works without a central repository or single administrator, It was invented by an unknown person or group of people under the name Satoshi Nakamoto and released as open-source software in 2009. The system is peer-to-peer, and transactions take place between users directly, without an intermediary. These transactions are verified by network nodes and recorded in a public distributed ledger called a blockchain.

What is a smart contract?

A smart contract is a computer protocol intended to facilitate, verify, or enforce the negotiation or performance of a contract. Smart contracts were first proposed by Nick Szabo in 1996. Proponents of smart contracts claim that many kinds of contractual clauses may be made partially or fully self-executing, self-enforcing, or both. The aim with smart contracts is to provide security that is superior to traditional contract law and to reduce other transaction costs associated with contracting.

What is a distributed ledger?

A distributed ledger (DLT) is a consensus of replicated, shared, and synchronized digital data geographically spread across multiple sites, countries, or institutions. There is no central administrator or centralized data storage. A P2P network is required as well as consensus algorithms to ensure replication across nodes is undertaken. One form of distributed ledger design is the blockchain system, which can be either public or private. But not all distributed ledgers have to necessarily employ a chain of blocks to successfully provide secure and valid achievement of distributed consensus: a Blockchain is only one type of data structure considered to be a distributed ledger.

How does a blockchain technology work?

To learn how blockchain works in a practice we encourage you to examine the below two links:
How does the blockchain work by Michele D’Aliessi
Blockchain in practice by Coindesk?
Blockchain for beginners by Blockgeek