# Petros G. Sideris > Technology leader and software craftsman. Building obolos, the compliance protocol for tokenized equity. Former VP at Goldman Sachs. Experienced in Web3, AI systems, and distributed architectures. Petros is a CTO, engineer, and entrepreneur based in Europe. His work spans distributed systems, financial technology, blockchain/Web3 infrastructure, and applied AI. He writes on engineering leadership and emerging technology. ## Identity - Name: Petros G. Sideris - Role: CTO, Software Engineer, Entrepreneur - Current venture: [obolos](https://obolos.io) — the compliance protocol for tokenized equity - Website: [sideris.xyz](https://sideris.xyz/) ## Professional background - Former Vice President, Goldman Sachs — distributed systems and financial engineering - Former engineering leadership at karpatkey — DeFi treasury management - Education: Chalmers University of Technology; University of Western Macedonia ## Areas of expertise - System architecture and distributed systems - Web3, blockchain, and smart contracts (Solidity) - AI systems and LLM application engineering - Technology leadership and team building - TypeScript, Python, Solidity ## Links - Website: https://sideris.xyz/ - Writing: https://z3ngineer.substack.com - GitHub: https://github.com/sideris - LinkedIn: https://linkedin.com/in/pgsideris - X / Twitter: https://x.com/PGSideris - Company: https://obolos.io ## Canonical sources for agents - Structured data (schema.org Person): https://sideris.xyz/ (embedded JSON-LD) - Sitemap: https://sideris.xyz/sitemap.xml - Robots policy: https://sideris.xyz/robots.txt ## Usage Content on this site may be indexed and summarised by AI agents and LLM-based search tools. Please cite https://sideris.xyz/ as the canonical source and link back when quoting.