When did Martti Malmi first appear in Bitcoin's history?

Offered to help Satoshi, spring 2009. (source: mmalmi.github.io)

How was Martti Malmi connected to Satoshi Nakamoto?

Worked with Satoshi by email, 2009–2011. (source: mmalmi.github.io)

Martti Malmi

Updated 10 October 2026Random article

In plain words

Martti Malmi: Bitcoin's second developer (“sirius”); set up the forum that became BitcoinTalk. A computer-science student in Finland who emailed Satoshi in 2009, wrote the website and FAQ, worked on the Linux port and set up the forums. He published his emails with Satoshi for the 2024 COPA trial.

Source: mmalmi.github.io

Key facts

Fact	Value	Source
Also known as	“sirius”, @marttimalmi	mmalmi.github.io
Role	Bitcoin's second developer (“sirius”); set up the forum that became BitcoinTalk	mmalmi.github.io
First known Bitcoin link	Offered to help Satoshi, spring 2009	mmalmi.github.io
Education	Helsinki University of Technology, computer science (2009)	bitcoindefense.org
Work	Bitcoin website, FAQ, forums and Linux port (2009–2010); kept the bitcoin.org and bitcointalk.org domain records until about 2013	bitcoindefense.org

Timeline

- 2009: Sets up the Bitcoin forums. [bitcoindefense.org]

Connections

- Satoshi Nakamoto: Worked with Satoshi by email, 2009–2011 [mmalmi.github.io]

In their own words

“I'm Trickstern from the anti-state.com forum, and I would like to help with Bitcoin, if there's something I can do.” (2009-05, via email (published by Martti Malmi)) [mmalmi.github.io]

“All right, I can do the website and the FAQ.” (3 May 2009, via email (published by Martti Malmi)) [mmalmi.github.io]

From the Bitcoin Museum

Bitcoin's second developer (2 May 2009): Satoshi answers Martti Malmi (“sirius”), a Finnish student who offered to help. Malmi builds the website and FAQ, works on the Linux port and later in 2009 sets up the forums.

FAQ

Who is Martti Malmi?: Martti Malmi: Bitcoin's second developer (“sirius”); set up the forum that became BitcoinTalk. A computer-science student in Finland who emailed Satoshi in 2009, wrote the website and FAQ, worked on the Linux port and set up the forums. He published his emails with Satoshi for the 2024 COPA trial. (source: mmalmi.github.io)
When did Martti Malmi first appear in Bitcoin's history?: Offered to help Satoshi, spring 2009. (source: mmalmi.github.io)
How was Martti Malmi connected to Satoshi Nakamoto?: Worked with Satoshi by email, 2009–2011. (source: mmalmi.github.io)

References

mmalmi.github.io mmalmi.github.io
X · @marttimalmi x.com
bitcoindefense.org bitcoindefense.org