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.

Cupping is the heart of specialty coffee evaluation, a practice where we explore flavor, balance, and aroma with precision and…

When we talk about coffee, most people think about roast levels, brewing methods, or origin. But there’s a sticky, sweet,…
Honey process coffee is pulped like a washed coffee but never rinsed. The skin comes off, the sticky sugar-rich mucilage…
Kopi Luwak, commonly referred to as civet coffee, is often described as one of the world’s most unique and luxurious…
Get to Know the Indonesian Wet-hulled Coffee Process The wet-hulled process, known locally in Indonesia as Giling Basah, significantly impacts…
1. What Makes Papua New Guinea Coffee So Intriguing? Tucked away in the South Pacific, Papua New Guinea (PNG) produces…
Why Peoples Drink Americano Before Exercise: Is It Really Effective? In the world of fitness and health, pre-workout supplements and…
1. The Forgotten Layer Behind Every Gayo Coffee In the misty highlands of Takengon, Aceh, where coffee trees rise from…
I. Introduction: Why Espresso Matters Espresso is more than just a strong little shot of coffee — it’s the foundation…
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…
Our cupping team is ready to build a profile around your brand — from single-origins for specialty cafés to consistent blends for export.