Petros K.

Senior Full Stack & AI Engineer helping startups turn AI ideas into production-ready products. I work with founders building SaaS platforms, AI copilots, automation systems, and LLM-powered workflows that need to actually work in the real world — not just look good in demos. Over the past years, I’ve helped design and ship systems involving: • AI assistants & multi-agent workflows • RAG pipelines with pgvector / vector search • Automation & orchestration systems • SaaS platforms with real users and scaling needs • Backend-heavy architectures with Rails & FastAPI • React / React Native applications • AI integrations using OpenAI, Anthropic, LangChain, and modern tooling What clients usually value most about working with me: • Strong product thinking, not just coding • Ability to move fast in ambiguous startup environments • Clear communication with founders & product teams • Focus on maintainable architecture and long-term scalability • End-to-end ownership from idea → production Tech stack includes: Ruby on Rails, FastAPI, React, React Native, PostgreSQL, Supabase, Sidekiq, Celery, Redis, LangChain, OpenAI APIs, vector databases, AWS, Docker, and modern AI infrastructure. If you’re building an AI-powered product and need someone who can combine engineering, architecture, and product execution — let’s talk.