Yaroslav T.
FreelancerTop Rated PlusAI Engineer building LLM agents, RAG pipelines and voice AI that run in production, not in demos. Python, FastAPI, Next.js, React, AWS, n8n.
WHAT I BUILD:
🤖 AI agents and workflows
Agents that plan, hold memory and run multi-step tasks through tool calling. Built with LangChain and LangGraph on OpenAI, Claude and Gemini APIs, plus MCP servers where the agent needs to reach your own systems. Every tool call is logged, with human approval on anything that moves money.
📚 RAG pipelines and knowledge retrieval
Retrieval-augmented generation over your internal data: chunking strategy, embeddings, metadata filtering, hybrid search and reranking. Vector databases including Qdrant, Pinecone and pgvector. Answers come with citations, so your team can verify instead of trusting. Every change is measured against a golden dataset, because tuning retrieval by eye is guesswork.
🎙️ Voice AI and conversational systems
Low-latency STT to LLM to TTS pipelines on Twilio, with interruption handling, barge-in and backend-controlled dialogue logic. Built a voice bot running 5,000 calls a day that qualifies customers and returns an offer. Chat agents on WhatsApp, Instagram and Messenger through the Meta Cloud API.
📄 Document processing and data extraction
OCR, parsing and structured extraction from PDFs, contracts, invoices and shipping documents. Every field carries a confidence score, and anything below threshold goes to a human review queue instead of silently into your database. The hard part is never the model call, it is output that is 90% right.
⚡ AI workflow automation
Zapier, Make and self-hosted n8n connected to real business systems: Slack, Salesforce, HubSpot, Monday, Airtable, Notion, Google Workspace, Shopify and Stripe. OAuth, webhooks, rate limits, retries, idempotency keys and sync state, with error workflows and a dead letter queue, built to survive the day the API changes.
⚙️ Backend engineering and data pipelines
Python, FastAPI, Django, Ruby on Rails, Node.js, NestJS and TypeScript. PostgreSQL, Supabase, MongoDB, Redis and Elasticsearch. Real-time and event-driven pipelines, including one processing 2.5 million articles a day and serving an API from 10M+ records in around 100ms.
💻 Frontend
React, Next.js App Router and TypeScript. Chat interfaces with streaming, tool states and history. Dashboards, admin panels and reporting UI, mobile-first and bilingual where it matters.
Poland#52 / 8,143Top 0.64%
Yaroslav T. earns an estimated $6.9k/mo. That's 5.9× the typical freelancer and more than 99.73% of everyone we track.