Roman Kaftanchikov
Zesh AI — Web3 SaaS Ecosystem for AI Agents, Decentralized Platform for Deploying and Monetizing AI Agents
Experience
Zesh AI — Web3 SaaS Ecosystem for AI Agents, Decentralized Platform for Deploying and Monetizing AI Agents
- Architected Zesh AI, a Web3 platform enabling decentralized AI agent creation and monetization.
- Developed modular agents for analytics, retrieval-augmented generation techniques, KOL analysis, and fraud detection using LangChain and Solidity.
- Built dashboards for predictive modeling, token-based rewards (ZAI), DAO governance, and multi-platform agent deployment (Telegram, X, Discord).
Tarotap — AI-Powered Tarot Reading SaaS, Multilingual AI Tarot Platform with Conversational Agents
- Built AI-driven tarot modules for personalized divination using LangChain, OpenAI API, and Python.
- Designed conversational UI with emotion-based insights, interactive card selection, and voice/text interactions.
- Delivered GDPR-compliant multilingual scaling across multiple regions.
Senior AI & SaaS Architect
IBM
- Led architecture and development of AI-native SaaS platforms serving enterprise teams across legal, healthcare, and finance verticals.
- Designed multi-agent LLM systems using LangChain, LangGraph, LangSmith, and OpenAI GPT-4 for dynamic knowledge workflows, document intelligence, and AI copilots.
- Developed modular SaaS architecture using Next.js, NestJS, AWS, PostgreSQL, Vercel, vector databases, and delivering secure, high-availability CI/CD, deploying globally via Vercel and AWS Lambda with HIPAA-compliant applications.
- Implemented advanced RAG pipelines with Pinecone, Chroma, and LlamaIndex, enhancing document recall by over 60% across large enterprise datasets.
- Integrated Stripe for metered billing, access tiers, and invoice automation; built real-time analytics and usage dashboards with D3.js and Supabase.
- Collaborated directly with product managers, AI researchers, and cloud engineers across 5+ international time zones, delivering quarterly product expansions.
Shipixen — AI-Enabled SaaS Boilerplate Generator, Developer-First SaaS Tool for Next.js Applications
- Contributed to Shipixen, an AI-driven platform generating production-ready Next.js boilerplates.
- Integrated OpenAI API for automated content generation.
- Developed customizable UI systems with Shadcn UI and Tailwind.
- Implemented Vercel one-click deployment with SEO optimization and modular design components.
EaseUS VoiceWave — Real-Time AI Voice Changer, AI-Powered SaaS for Games & Streaming
- Developed real-time AI voice manipulation features for EaseUS VoiceWave, supporting Discord, Zoom, and OBS.
- Engineered low-latency voice modulation, integrated 300+ AI voice presets, and built audio tools such as noise reducer, recorder, and mixer.
- Collaborated on AI voice generation (TTS) and multilingual UX for gaming environments.
Lead Mobile & BlockChain Engineer
CryptoBlock.Domains
- Led development of a cross-platform mobile SaaS platform using React Native, Expo, and Firebase, enabling over 100K users to track vitals, receive diagnostics, and securely interact with care providers.
- Integrated OpenAI GPT-4, LangChain, and custom vector models to power intelligent care plan generators, multilingual triage bots, and AI-driven patient history summarization.
- Architected secure, HIPAA-compliant mobile infrastructure with NestJS, Node.js, and OAuth2 — including encrypted data flows, session token handling, and audit-ready logging systems.
- Implemented SMART on FHIR APIs, HL7 connectors, and full EMR/EHR integration for real-time health data sync.
- Designed provider dashboards and WebSocket-powered chat UIs with OneSignal-based push alerts, real-time vitals charts, and patient triage prioritization.
- Introduced Web3-enabled features such as tokenised health ID systems, private wallet auth, and patient-owned data sharing via Solidity-based smart contracts on Polygon testnets.
- Piloted blockchain-based audit trails using IPFS and Ethereum, enabling traceable, tamper-proof clinical records and AI decision logs.
- Built offline support with SQLite, biometric login, and role-based multilingual UIs optimised for field clinics and global distribution.
B2B Loan Marketplace Platform for Asset Buying & Selling, Generative AI & Multi-Agent Systems — SaaS Platform Connecting
- Developed a nationwide SaaS platform connecting loan servicers and institutional investors for asset transactions.
- Built valuation and bidding systems with Laravel and MySQL.
- Integrated XL Value Engine for instant property estimates.
- Implemented Vue.js interfaces for buy/sell workflows.
- Ensured secure CRM integration, asset filtering, knowledge graphs, document intelligence, AI SEO, and responsive design.
Full Stack SaaS Engineer
Social Snowball
- Delivered over a dozen full-stack MVPs for early-stage startups in AI, health, edtech, and fintech — building scalable SaaS platforms and mobile apps using React Native, Next.js, and NestJS.
- Designed microservice-based backend systems using Node.js, PostgreSQL, and Firebase, supporting real-time features, analytics pipelines, and user role management.
Summary
Senior Full Stack & AI Engineer with 9 years of experience in building scalable SaaS products, AI systems, and Web3 platforms across web and mobile. Expertise in multi-agent systems with LLMs (GPT-4, Claude, etc.), LangChain, RAG, and front-end/mobile technologies like Next.js, React, and React Native. Skilled in backend development with JavaScript, TypeScript, Python, and Node.js, experienced in integrating Web3 solutions, blockchain, and smart contracts. Proficient in AWS, Vercel, vector databases, and delivering secure, high-availability HIPAA-compliant applications. Proven track record in collaborating with startups to modernize legacy systems and ensure long-term product success.
Skills
Full Stack & Saas Architecture — React.js, Next.js, Node.js, Nestjs, Fastapi, Typescript, Graphql, Rest Apis, Postgresql, Supabase, Firebase, Real-time Systems (Websockets), Serverless Functions, Microservices Architecture, Modular Saas Design
Web3 & Decentralized Systems — Solidity, Ethereum, Polygon, Smart Contracts, Wallet Integration, Tokenized Identity Systems, Ipfs, Decentralized Storage, Blockchain-based Audit Trails
Frontend & Mobile Development — React Native, Expo, Tailwind Css, Material Ui, Responsive Ui/ux, State Management (Redux, Zustand), Offline Sync, Biometric Auth, Performance Optimization
Machine Learning & Data Engineering — Python, Tensorflow, Pytorch, Scikit-learn, Pandas, Numpy, Vector Embeddings, Fine-tuning Llms, Model Evaluation, Prompt Engineering, Data Preprocessing, Feature Engineering, Embedding Search Optimization
Generative Ai & Multi-agent Systems — Langchain, Langgraph, Langsmith, Openai Gpt-4/4o, Claude, Mistral, Llama, Anthropic, Retrieval-augmented Generation (Rag), Ai Agents, Vector Databases (Pinecone, Chroma, Llamaindex), Knowledge Graphs, Document Intelligence, Ai Copilot Design, Function Calling, Context Orchestration
Ai Automation & Workflow Orchestration — N8n, Zapier, Make.com, Custom Webhook Pipelines, Automated Data Flows, Event-driven Workflows, Llm-based Process Automation
Cloud Infrastructure & Mlops — Aws (Lambda, Ec2, S3, Cloudfront, Sqs, Dynamodb), Gcp, Vercel, Docker, Kubernetes, Ci/cd Pipelines, Github Actions, Model Deployment, Api Scaling, Serverless Ml Integration, Monitoring And Logging
Languages
Education
Universitat Politècnica de València (UPV)
Bachelor of Applied Science, Computer Science · Computer Science · Valencia, Spain
Profile
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