Senior Frontend Engineer with 10+ years architecting large-scale, high-load applications — now focused on building production-grade UIs for AI products, engineering agentic coding pipelines, and pioneering Generative UI frameworks.
Currently founding UI developer at Tesari.ai, building interfaces for an AI-driven intelligence platform where auditability and real-time depth are non-negotiable.
I help teams ship LLM-powered interfaces, architect autonomous developer-agent ecosystems, and adopt AI-assisted development workflows (Claude Code, agentic tooling) without sacrificing architecture, performance, or quality.
AI ENGINEERING, AGENTIC DEVELOPMENT & GENERATIVE UI
• Building production UIs for AI/LLM products: chat & agent interfaces, streaming responses, tool-calling visualizations, human-in-the-loop review flows.
• Generative UI Architecture: Designing and implementing systems for real-time, dynamic interface generation, transforming structured LLM outputs into context-aware UI components on the fly.
• Agentic Coding Pipelines & Infrastructure: Engineering autonomous developer-agent environments using Claude Code; setting up project contexts, custom agent skills, and multi-agent execution workflows.
• Automated Quality & Security Guardrails: Developing specialized monitoring agents dedicated to autonomous code review, continuous technical debt tracking, and security vulnerability detection.
• Advanced Workflow Automation: Designing custom agentic orchestrations to automate complex refactoring, end-to-end test generation, and multi-step repository-wide development tasks.
• Integrating LLM APIs (Anthropic, OpenAI): Embedding advanced capabilities into apps via high-performance streaming, structured outputs, function/tool calling, and RAG-driven UIs.
• Designing UX for AI Trust: Architecting interfaces focused on source provenance, citations, deep auditability, and explainable AI outputs.
• Enterprise-Grade Workflows: Establishing AI-assisted workflows that scale without sacrificing core codebase quality, performance, and maintainability.
CORE EXPERTISE
Frontend Architecture & Scalability
• Architecting large-scale, high-performance frontend applications
• Microfrontend architecture (Webpack Module Federation, Islands Architecture)
• Refactoring and modernizing legacy codebases
• Step-by-step migration without functionality loss
• Team leadership (up to 5 persons)
TECHNICAL SKILLS
Yurij A. earns an estimated $7.2k/mo. That's 4.9× the typical freelancer and more than 99.75% of everyone we track.
JavaScript / TypeScript
• Modern JavaScript/TypeScript for enterprise applications
• Deep OOP knowledge and SOLID principles
• Advanced React Patterns: HOCs, Render Props, Compound Components
• Unit testing: Jest, React Testing Library, Playwright
React
• Distributed, high-load applications with TypeScript
• Server Components and Concurrent Features (React 18+)
• Next.js, Vite, performance optimization
• State management: Redux, MobX, Zustand
• Bundle size optimization and code splitting
Architecture & Systems
• Design Systems (Figma tokens, Storybook)
• Headless components architecture
• Domain-Driven Design and architectural patterns
• Monorepo: Nx, Lerna, Turborepo
• Private npm registries and UI libraries
• Auth management with Okta
• GraphQL with subscriptions/real-time
Node.js
• Backend development with Express/NestJS
• TypeORM/Prisma, MongoDB, PostgreSQL
• GraphQL implementation
Development & Quality
• Performance profiling and Web Vitals optimization
• Frontend security best practices
• Accessibility compliance (WCAG)
• i18n and analytics integration
• Git workflows, Docker, Kubernetes
• Agile methodologies, JIRA, Azure DevOps