09/12/2026 updated
100 % available
Senior AI Full Stack Engineer
Lubelskie, Poland
Only remote
Information Technology - Software Engineering, Western Governors UniversityAbout me
Seasoned Senior AI Full Stack Engineer with over 8 years of experience delivering cutting-edge AI-driven applications. Expertise in integrating complex machine learning models with intuitive UIs and designing scalable, end-to-end software solutions.
AI & Machine Learning
Expertise in NLP, Multilingual AI Agents, Voice Bots, and 3D Web Experiences. Development of RAG knowledge systems using LangChain and Pinecone, as well as integration of GPT-4 into customer-facing applications, improving efficiency and reducing workload significantly.
Full Stack Development
Proficiency in frontend technologies such as React.js, Next.js, Vue.js, Tailwind CSS, GSAP, and Three.js, combined with backend expertise in Node.js, Python (Django, FastAPI, Flask), MongoDB, PostgreSQL, MySQL, and Supabase. Delivery of over 30 AI-powered full-stack applications for SaaS startups.
Cloud & Deployment
Hands-on experience with AWS (Lambda, API Gateway, S3), Vercel, Firebase, Docker, and CI/CD pipelines via GitHub Actions. Design and deployment of scalable, serverless backends handling thousands of concurrent users.
Frontend Development
Strong command of React.js, Next.js, Vue.js, Tailwind CSS, GSAP, and Three.js for building responsive, mobile-first, and high-performance user interfaces.
Backend Development
Solid foundation in Node.js, Python frameworks (Django, FastAPI, Flask), and databases including MongoDB, PostgreSQL, MySQL, and Supabase for building robust server-side solutions.
API Integration & Web3
Experience with REST and GraphQL APIs as well as Web3 Technologies, enabling seamless integration of third-party services and decentralized application components.
Tools & Frameworks
Practical use of Firebase Cloud Firestore, Nuxt.js, Next.js, React Native, and Expo for cross-platform and scalable application development.
Database Management
Deployment and management of scalable PostgreSQL, MongoDB, Redis, and Chroma systems with secure authentication for production environments.
Expertise in NLP, Multilingual AI Agents, Voice Bots, and 3D Web Experiences. Development of RAG knowledge systems using LangChain and Pinecone, as well as integration of GPT-4 into customer-facing applications, improving efficiency and reducing workload significantly.
Full Stack Development
Proficiency in frontend technologies such as React.js, Next.js, Vue.js, Tailwind CSS, GSAP, and Three.js, combined with backend expertise in Node.js, Python (Django, FastAPI, Flask), MongoDB, PostgreSQL, MySQL, and Supabase. Delivery of over 30 AI-powered full-stack applications for SaaS startups.
Cloud & Deployment
Hands-on experience with AWS (Lambda, API Gateway, S3), Vercel, Firebase, Docker, and CI/CD pipelines via GitHub Actions. Design and deployment of scalable, serverless backends handling thousands of concurrent users.
Frontend Development
Strong command of React.js, Next.js, Vue.js, Tailwind CSS, GSAP, and Three.js for building responsive, mobile-first, and high-performance user interfaces.
Backend Development
Solid foundation in Node.js, Python frameworks (Django, FastAPI, Flask), and databases including MongoDB, PostgreSQL, MySQL, and Supabase for building robust server-side solutions.
API Integration & Web3
Experience with REST and GraphQL APIs as well as Web3 Technologies, enabling seamless integration of third-party services and decentralized application components.
Tools & Frameworks
Practical use of Firebase Cloud Firestore, Nuxt.js, Next.js, React Native, and Expo for cross-platform and scalable application development.
Database Management
Deployment and management of scalable PostgreSQL, MongoDB, Redis, and Chroma systems with secure authentication for production environments.
Experience
Professional experience10+ years
Freelancer since2016
Languages
EnglishNative speaker
Project history
Built 30+ AI-powered apps for startups using Next.js, React Native, Python (FastAPI/Django), Supabase, and AWS. Developed a Next.js SaaS dashboard with AI analytics achieving a Lighthouse score of 98/100. Created a React Native wellness app with NLP mood tracking. Built a RAG knowledge system using LangChain, Pinecone, and Supabase, improving accuracy by 60%. Integrated GPT-4 into customer support portals, reducing agent workload by 50%. Designed serverless backends on AWS using Docker and GitHub Actions CI/CD. Deployed scalable PostgreSQL, MongoDB, Redis, and Chroma systems with secure authentication.
Led development of an NLP-driven web platform using React, Node.js, Python, and MongoDB. Delivered sentiment analysis, text classification, and role-based dashboards enhancing user decision-making. Deployed the platform on AWS EC2 using Docker, ensuring scalability, security, and maintainability. Integrated AI-driven analytics, increasing actionable insights for users by 40%.
Built MVPs and full-stack applications using React, Express, Python, and PostgreSQL, integrating OpenAI APIs and JWT authentication. Developed mobile-first, responsive UIs using Tailwind CSS. Extended functionality with React Native and Expo, ensuring accessibility across all environments. Delivered production-ready, high-performance applications enabling startups to rapidly iterate and deliver investor-ready products.