§ FOUNDER
Dušan Dželebdžić
Founder of Biro. Thirty years of writing and running software, ten of them running an agency.
An engineer who ran an agency.
Dušan is a full-stack developer. On the frontend he works with React and Next.js; on the backend with TypeScript, PHP (Symfony), and Python. He has shipped native mobile apps and runs his own infrastructure on AWS, because knowing how everything runs underneath is most of the job.
He works with a bench of specialists he has trusted for years: architects, security testers, frontend developers, and marketers. Clients still talk to him, and he still owns the result.
Ten years, 350+ projects.
Before Biro, Dušan ran Symbiotica, a web and digital agency. Over ten years it delivered more than 350 projects for clients in the United States, Europe, Asia, and the Middle East, from small businesses to oil companies, universities, and NGOs.
A fair share of that work was white-label: sites built and looked after for other agencies, under their names. One of those partnerships began with a conversation at Social Media Marketing World in San Diego and lasted years. The agency held the client relationships in North America; Symbiotica did the delivery.
Biro carries that experience forward, for agencies that want the same arrangement.
Notes from production.
Dušan writes about the engineering side of the work at ddz.dev: the bugs, bills, and outages behind websites that are supposed to just work. A few to start with:
- WordPress fleets on AWS are rotting from the database up
- NAT Gateway is eating your AWS bill
- Modernization usually means rewriting everything wrong
- 280 vulnerabilities, one unused package
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