Jonnie Hallman is a principal design engineer based 📍 HCMC, working at Era during the day and building Cushion at night.
My work focuses on building thoughtful, intuitive, and delightful interactions for the web, with a devotion to process, transparency, and sharing what I learn.
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Startups optimize for finding the right answer. Established products optimize for not giving the wrong one.
May 4, 2026
20 năm, 40 ví điện tử, hàng tỷ USD đốt vào khuyến mãi. Cuối cùng kẻ thắng cuộc là một chuẩn kỹ thuật không có launch event ầm ĩ…
January 28, 2026
AI today is no different. People don’t wake up and decide which model to use. They open Outlook, Excel, their IDE, Search, Chat. Whichever AI is already there wins.
June 28, 2025
Grab calls its drivers “partners.” In 2024, Grab posted $2.8 billion in revenue. Its partners averaged 6.2 million dong a month. Same word, two very different arrangements.
December 25, 2024
That’s it for now. Need more?
Read the blog, where I document the process of building this site from scratch, as well as share a behind-the-scenes look at my work