Daniel K.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

I build AI-native products that connect LLMs to real business workflows—not isolated chatbot demos. I’m an AI-Native Full-Stack Engineer with 8+ years of product-engineering experience. I deliver complete systems across agent orchestration, backend services, APIs, databases, integrations, deployment, and polished user interfaces. RECENT AI-NATIVE WORK • Multilingual LangGraph appointment assistant integrated with Telegram and EspoCRM, supporting booking, rescheduling, cancellation, voice input, authorization controls, and human approval • Modular multi-agent personal assistant with supervisor and specialist agents, MCP integrations, scheduling, persistence, and runtime configuration • Reusable architecture for tool-enabled LangGraph agents • Directus and Nuxt website platform with structured content, visual editing, SSR/ISR, Docker, and optional AI-assisted page generation WHAT I CAN BUILD • AI agents and multi-agent workflows • LLM-powered SaaS products • CRM, CMS, payment, and third-party API integrations • MCP servers and tool-enabled assistants • Telegram bots and conversational automation • Human-in-the-loop approval workflows • Full-stack TypeScript and Python applications • Internal tools, dashboards, and workflow automation PROVEN PRODUCT-ENGINEERING FOUNDATION I bring senior engineering discipline from products used at scale. As a long-term contractor embedded in Upwork’s Reputation team, I delivered high-impact marketplace features for products serving millions of freelancers and supported production systems through on-call responsibilities. My broader commercial work includes: • Improved AI-assisted onboarding completion by 25% for 500+ users • Reduced merchant subscription setup time by 20% • Reduced cart and payment abandonment by 15% • Built analytics interfaces handling 10M+ data points • Led a four-person team building a modular CRM platform CORE STACK LangGraph, LangChain, MCP, Python, TypeScript, Node.js, Vue, Nuxt, React, Next.js, PostgreSQL, Supabase, Directus, Docker, GraphQL, and REST APIs. I focus on maintainable architecture, automated testing, authorization boundaries, privacy-conscious observability, graceful failure handling, and production-ready UX. Tell me what you want to automate or build. I’ll give you a clear technical assessment and a practical path to delivery.