Igor Rončević · Software engineer
I like taking difficult technical problems and turning them into products people can use.
Selected work
What shipped first, then the engineering behind it.
[ Work ]
2 projects
Led the core vault from design to production, including its vault contract, hooks, libraries, oracle registry, and supporting infrastructure.
[ Client projects ]
2 projects
[ Other projects ]
1 project
Writing
Agent skills are scalable units of institutional knowledge that compartmentalize smaller portions of one’s workflows. They aren’t as flashy as autonomous agents, but they offer something more valuable for senior engineers: reproducibility and leverage. The key is managing prompts and inputs deliberately.
A practical definition of what “done” means for secure blockchain protocols. This post explains how mature teams move beyond “audit before launch” by embedding security into requirements, development, testing, reviews, audits, monitoring, and incident response, so protocols can scale without getting exploited.
After years of (technically) being in a public beta, Solidity is finally preparing for something it hasn’t dared to do for a decade: hit version 1.0, the first official stable version of the language. But it wouldn’t be the blockchain world if we didn’t have a fork once in a while.
On September 2nd, an attacker turned Bunni's innovative math against itself, draining two pools across Ethereum and Unichain and stealing $8.4M in under 5 minutes. No fancy vulnerabilities, just a price manipulation and 44 carefully crafted micro withdrawals that exploited a precision bug everyone missed, even after three audits...
If you’ve ever upgraded a smart contract and watched perfectly good state turn to junk, you’ve seen storage collisions. Old state gets written over and variables become corrupted, rendering the contract useless. There are examples of how simple storage collisions can cause millions of dollars in damages, which happened to Audius...
About
I'm Igor Rončević, an independent software engineer who builds and secures on-chain products.
I work close to the difficult parts: protocol architecture, smart contracts, security reviews, integrations, and the product infrastructure that makes a system useful in practice.
Based in Serbia and working remotely, I partner with teams that need technical ownership from the first design decision through a production release. My focus is protocol engineering, security, and AI.
Outside work, I'm an amateur pizzaiolo, a weightlifter, and a curious mind that keeps a growing reading list of books and essays that shape how I think about my craft and life in general.
Contact
I build and secure onchain products - vaults, bridges, marketplaces, and product infrastructure. For a project, audit, or technical conversation, send a message.
Direct line — you will speak with the engineer building the work.