Xin chào / Hello

Hi, I’m Biên (bienkma). I’m Vietnamese, fluent in Vietnamese and English, and I’ve spent more than fifteen years building and running infrastructure—systems, networks, and cloud—mostly on Linux and open source.

I studied information security at the Academy of Cryptography Techniques in Hanoi (engineer, 2005–2010; master’s, 2015–2017) and won first prize in Vietnam’s national Student Contest on Information Security in 2010. That foundation—security first, then everything else—still shapes how I design platforms. Along the way I picked up LPI-1, CKA, PCI DSS, and ITIL v4 Foundation; they’re useful shorthand, but most of what I know came from running production.

I love programming and working close to the metal—that’s why I began with bash, moved into Python for scripting and tooling, and later Go to build products around virtualization and cloud. The day-to-day stack grew from there (Ansible, Terraform, Kubernetes, Docker, databases, load balancers, observability), but the thread is the same: understand how things actually run, then automate and harden them.

Along the way I’ve helped major telcos in Vietnam stand up two on-premise big-data platforms—about 10 PB and 8 PB—on Hortonworks and Cloudera, with Hadoop, Kafka, ZooKeeper, Spark, HBase, Hive, Pig, and Sqoop underneath. I care about performance, security, and operability in equal measure; whether it’s tuning I/O schedulers or encryption at rest, I’d rather understand the system than paper over it.

Lately, what pulls me most is sovereign virtualization and cloud—platforms you can run, audit, and evolve on your own terms—woven together with modern cryptography: encryption at rest and in transit, key management, and the post-quantum and mesh-VPN work that’s starting to matter in production. The tools change; the aim doesn’t—build infrastructure that stays reliable, fast, and defensible, and leave it clearer than you found it.

This site is a personal notebook: curated links under Notes, longer write-ups under Posts. No newsletter, no ads, no tracking—just things I wanted to keep somewhere public.

Cảm ơn bạn đã ghé thăm — thanks for stopping by. I hope you find something useful here.