10/14/2026 updated

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Full Stack Engineer | AI SaaS & Web3 Platforms | React, Node.js, Python, LLM Integration

Lviv, Ukraine
Only remote
Ivan Franko National University of Lviv
Lviv, Ukraine
Only remote
Ivan Franko National University of Lviv

Profile attachments

Eugen_Skibchuk_CV_1 (2).pdf

AI AgentsJava (Programming Language)JavaScriptC++ (Programming Language)Cascading Style Sheets (CSS)JSONPython (Programming Language)PostgreSQLMongoDBMySQLNode.jsNext.jsTypeScriptOop LanguageReact.jsExpress.jsFastAPIAWS Data AnalyticsFigmaGraphQLWeb3.jsReact ReduxNestJSRestful Api
Full Stack Web Development
Expertise in building end-to-end web applications using React, Next.js, Vue.js on the frontend and Node.js, Express, NestJS, FastAPI, and Django on the backend, covering architecture, data modeling, API design, and deployment.

AI & LLM Integration
Deep hands-on experience integrating large language models including OpenAI, Anthropic Claude, and Gemini, designing AI agent and fine-tuning workflows, implementing retrieval-augmented generation (RAG) with vector databases, and building multi-agent orchestration systems.

Web3 & Blockchain Development
Proficiency in developing dApps and smart contracts on Solana and EVM/Ethereum chains, including wallet connectivity, transaction handling, on-chain data indexing, and front-end integration using ethers.js and web3.js.

TypeScript & JavaScript
Strong command of TypeScript and JavaScript as primary programming languages across frontend and backend projects, ensuring type safety and scalable codebases.

Python Development
Solid Python skills applied in backend services, AI/LLM pipelines, data evaluation workflows, and fine-tuning tooling using frameworks such as FastAPI and Django.

Cloud & DevOps
Practical experience with AWS, Docker, CI/CD pipelines, Vercel, and Git for deploying and maintaining production-grade cloud infrastructure.

Database Management
Proficiency with relational and non-relational databases including PostgreSQL, MongoDB, and Redis, covering data modeling, query optimization, and production workload management.

REST & GraphQL API Design
Design and implementation of RESTful and GraphQL APIs, including authentication, subscription and payment flows, and third-party integrations.

Mobile Development with Flutter
Cross-platform mobile feature development using Flutter, backed by Node.js services, delivering production-ready mobile applications.

Solidity & Smart Contract Development
Writing and auditing smart contracts in Solidity for EVM-compatible chains, ensuring secure and well-tested on-chain logic.

Experience

Professional experience5 - 10 years
Freelancer since2020

Languages

EnglishFluentUkrainianNative speaker

Project history

Full Stack Engineer - editor, AI integrations & export systems

Syllabbles (getsyllabbles.com)
All-in-one AI suite that turns one idea into ebooks, flipbooks, audiobooks, podcasts, and designs from a single dashboard. Built the rich-text editor with drag-and-drop layout, live preview, auto-save, and section management. Integrated multi-model AI (GPT, Claude, Gemini, DeepSeek) for AI writing, brand-voice training, and content humanization. Implemented import pipelines (DOCX/PDF/URL/YouTube) plus voice-to-text and AI cover/design generation. Developed marketplace-ready export to PDF, ePub, MP3, and M4B for KDP, Audible, and Spotify. Tech: React, Node.js, multi-LLM APIs, AWS S3, audio/PDF/ePub processing.

Full Stack Engineer - video pipeline & multi-platform publishing

Taja AI (taja.ai)
AI platform that repurposes one long-form video into 25+ pieces of content including shorts, clips, blog posts, and social posts. Built YouTube ingestion and transcription that analyzes a channel niche and brand voice. Developed the clip/shorts generation engine and automated SEO for titles, descriptions, and tags. Implemented a scheduler publishing to YouTube, X, Instagram, Facebook, TikTok, and LinkedIn via their APIs. Added a next video idea generator surfacing high-volume, low-competition keywords. Tech: TypeScript, React, Node.js, video/transcription pipelines, social platform APIs.

Full Stack Engineer - monitoring, sentiment & outreach modules

BrandJet AI (brandjet.ai)
Brand-intelligence and outreach platform measuring how a brand is perceived by both people and AI models. Built real-time brand-mention monitoring across social and news with AI sentiment analysis. Implemented AI-model perception scoring showing how LLMs like ChatGPT and Claude represent a brand. Developed the unified inbox and multi-channel outreach across email, LinkedIn, WhatsApp, and Instagram. Created the PR module for discovering journalist pitch requests and managing leads. Tech: Next.js, Node.js, PostgreSQL, LLM analysis pipelines, multi-channel messaging APIs.

Full Stack / AI Engineer - agent builder & multi-agent orchestration

TeamPal (teampal.ai)
No-code platform for building, training, and deploying a custom AI workforce across business departments. Built the no-code agent builder with 80+ role templates and 30+ plugins (search, image gen, document reader). Implemented company-data knowledge bases so agents learn brand voice, workflows, and context. Developed group chat enabling multiple agents to collaborate within one conversation. Integrated multi-LLM support (GPT, Claude, Gemini) and an MCP server for tool connectivity. Tech: React, Node.js / NestJS, vector DB, multi-LLM orchestration, MCP, REST.

AI / Full Stack Engineer - dataset, evaluation & logging tooling

Finetuning.ai (finetuning.ai)
LLM fine-tuning and customization platform for building faster, cheaper, domain-specific models. Built dataset-management tooling for creating and curating fine-tuning datasets. Implemented prompt versioning and side-by-side model comparison to track performance. Developed production-data logging with filtering and tracing of real-world model behavior. Added human-in-the-loop and LLM-as-judge evaluation workflows for output quality. Tech: Python, TypeScript, React, model-provider APIs, dataset & eval tooling.

Full Stack Engineer - validation workflows & AI co-founder features

Icanpreneur (icanpreneur.com)
AI co-founder platform guiding early-stage founders from raw idea to traction with structured validation and GTM. Built guided workflows for business-model generation, problem validation, and buyer personas. Developed AI customer-interview and insight-analysis features turning inputs into actionable evidence. Implemented generation of GTM assets including positioning, landing pages, and pitch decks. Created an embeddable AI interview widget to run the platform capabilities inside external products. Tech: Next.js, Node.js, PostgreSQL, LLM workflows, embeddable widget SDK.

Full Stack Engineer

Genius HRTech Services L.L.C - FZ
Built and shipped full-stack features for AI-powered SaaS products in Next.js and Node.js, owning work from UI through API and database layers. Integrated multiple LLM providers (OpenAI, Claude, Gemini) for content generation, automation, and AI agent capabilities. Designed REST APIs, data models, authentication, and subscription/payment flows; deployed services to cloud infrastructure. Worked directly with founders and product to turn requirements into scalable features and fast release cycles.

Artificial Intelligence Engineer

TELUS Digital AI Data Solutions
Engineered AI and LLM-driven systems, including multi-agent and subagent workflows that automate complex, multi-step tasks. Built data and evaluation pipelines for fine-tuning and assessing model outputs, improving accuracy and reducing hallucinations. Implemented retrieval-augmented generation (RAG) with vector databases and production-grade prompt-engineering strategies. Delivered full-stack tooling (React + Node.js / Python) exposing AI capabilities through clean interfaces and APIs.

Full Stack Web3 Engineer

LimeChain - Blockchain & Web3 Solutions
Developed dApps and smart contracts on Solana and EVM chains, covering on-chain logic and front-end integration. Built wallet connectivity, transaction handling, and on-chain data indexing for production blockchain products. Delivered cross-platform mobile features with Flutter, backed by Node.js services. Shipped secure, audited, well-tested solutions within an agile client-facing team.

Full Stack Engineer

Intelia
Designed and built client-facing web applications end to end with React.js and Node.js over a 3+ year tenure. Developed reusable component libraries, REST APIs, and database schemas powering core product features. Optimized application performance, API response times, and database queries for production workloads. Partnered with stakeholders to scope, estimate, and deliver features on schedule.

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