Yuriy K.

I build backend systems and AI-powered products that work in production. Over 10+ years I've specialized in PHP/Laravel — SaaS platforms, REST/GraphQL APIs, multi-tenant systems, complex business logic. For the past several years that work has increasingly centered on AI: RAG pipelines (custom implementation, pgvector), multi-agent systems with tool/function calling, and integrating text, vision, and audio models into real products. I've worked with: OpenAI, Claude, Gemini, Perplexity, AlibabaCloud — not as experiments, but as production features with streaming, fallbacks, and cost control. Flagship project — TransparenTerra (5 years) Sustainability data platform. I joined at day zero and owned backend architecture through 5 years of continuous production. Designed the system from scratch, scaled it as data and complexity grew, refactored without breaking production. What I help you build: — Laravel APIs, SaaS backends, multi-tenant systems — RAG systems, AI agents, LLM integrations — REST/GraphQL APIs, background queues, performance optimization — AI features added to existing products — properly, not as hype How I work: I think in architecture, not just tasks. I ask the right questions before writing code. I'm comfortable leading development or joining an existing team. If you need someone who treats your product like his own — let's talk.