About the Author

Putra Siregar

Putra writes for Indonesia Specialty Coffee — origins, cupping, processing, and the trade behind every cup.

Putra Siregar leads coffee curation and content at Indonesia Specialty Coffee. He writes practical guides on green-coffee handling, roasting and brewing — from diagnosing defects like mold to dialing in espresso — helping roasters and coffee lovers get the most from Indonesian beans.

Role
Head of Sourcing
Articles
199 published
Coverage
Sumatra Sourcing
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Insights & stories

Latest articles by Putra Siregar.

Arabica Puntang: The West Java Coffee That Won the World in 2016
Articles

Arabica Puntang: The West Java Coffee That Won the World in 2016

In April 2016, a coffee from a forest on a West Java mountain walked into a competition in Atlanta and…

20/08/2026Read
Timor Coffee (NTT): The Island That Gave the World Rust-Resistant Arabica
Articles

Timor Coffee (NTT): The Island That Gave the World Rust-Resistant Arabica

Some origins matter for how they taste. Timor matters for what it did to every other coffee. Timor coffee is…

14/08/2026Read
Java Malabar Coffee: West Java’s Original Volcano Arabica
Articles

Java Malabar Coffee: West Java’s Original Volcano Arabica

When someone calls coffee “a cup of Java,” this is roughly where the phrase was born. Java Malabar coffee is…

13/08/2026Read
Sulawesi Enrekang Coffee: The Home of Kalosi, and Its Move to Full-Washed
Articles

Sulawesi Enrekang Coffee: The Home of Kalosi, and Its Move to Full-Washed

If you have ever bought “Sulawesi Kalossi,” you have bought Enrekang coffee, whether the bag said so or not. Sulawesi…

12/08/2026Read
Papua Wamena Coffee: Indonesia’s Highest, Remotest Arabica from the Baliem Valley
Articles

Papua Wamena Coffee: Indonesia’s Highest, Remotest Arabica from the Baliem Valley

Most Indonesian coffee grows on a volcano. This one does not. Papua Wamena coffee is arabica grown in the Baliem…

11/08/2026Read
Minang Solok Coffee: West Sumatra’s Bright, Winey Answer to Earthy Sumatra
Articles

Minang Solok Coffee: West Sumatra’s Bright, Winey Answer to Earthy Sumatra

Everything you think you know about Sumatran coffee, Solok politely ignores. Minang Solok coffee is arabica grown in Solok Regency,…

10/08/2026Read
Bengkulu Coffee: Indonesia’s Underrated Robusta Giant and Its Highland Arabica
Articles

Bengkulu Coffee: Indonesia’s Underrated Robusta Giant and Its Highland Arabica

The British planted coffee here before there was Indonesia. Bengkulu was Bencoolen, an East India Company outpost on Sumatra’s west…

07/08/2026Read
Kerinci Coffee: Jambi’s Bright Arabica, Highland Robusta, and Jackfruit Liberica
Articles

Kerinci Coffee: Jambi’s Bright Arabica, Highland Robusta, and Jackfruit Liberica

Most Sumatra coffee tastes like Sumatra: heavy, earthy, low-acid, the taste of wet-hulling and humidity. Kerinci is the origin that…

07/08/2026Read
Tanah Karo Coffee: The Sumatra Arabica That Grew Back After the Volcano
Articles

Tanah Karo Coffee: The Sumatra Arabica That Grew Back After the Volcano

Drive up from Medan toward Berastagi, and the coffee starts about where the vegetable fields stop. A lot of it…

06/08/2026Read
Putra Siregar
Profile summary

Putra Siregar

Head of Sourcing · Indonesia Specialty Coffee

Putra Siregar leads coffee curation and content at Indonesia Specialty Coffee. He writes practical guides on green-coffee handling, roasting and brewing — from diagnosing defects like mold to dialing in espresso — helping roasters and coffee lovers get the most from Indonesian…

199
Articles published
2023
Writing since
Oct 2026
Latest article
CuppingOriginsProcessingSourcingSensoryExport
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