Andrii B.

Full Stack Developer React Next.js Node Nest.js Typescript AI

⚡ Full Stack Developer specializing in React Nextjs TypeScript Nodejs Nestjs PostgreSQL MongoDB AWS Supabase Firebase OpenAI Claude LangChain GraphQL REST APIs and cloud native architectures for SaaS platforms AI products MVP marketplaces and business web applications. 3+ years of experience 20+ delivered products 10+ industries I help startups in full stack development and growing businesses turn ideas into production ready software. From architecture planning and UI implementation to backend systems cloud infrastructure integrations and deployment I take ownership of the entire development process and focus on building products that are reliable scalable secure and easy to maintain. ✅ What Clients Can Expect ✔️ 20+ production applications delivered ✔️ Experience across 10+ industries including SaaS AI FinTech Healthcare EdTech E commerce Marketplaces Real Estate and Logistics ✔️ MVP development in as little as 4-8 weeks ✔️ Regular progress updates every 1-2 days ✔️ Clean maintainable code designed for long term growth ✔️ Experience working with startups founders product owners and distributed teams across various time zones ✔️ End to end ownership from planning and development to deployment and ongoing support ✔️ Focus on business goals not just writing code ⚙️ Tech Stack Full stack Frontend React Nextjs TypeScript JavaScript Redux Redux Toolkit Redux Saga TailwindCSS Material UI Shadcn UI Styled Components HTML5 CSS3 Framer Motion Recharts ApexCharts Backend Nodejs Nestjs Expressjs GraphQL REST API WebSockets Prisma TypeORM Sequelize Drizzle ORM Redis RabbitMQ Kafka Elasticsearch Databases PostgreSQL MongoDB MySQL Supabase Firebase Firestore Redis DynamoDB ClickHouse AI & LLM OpenAI ChatGPT GPT 4 GPT 4o Claude Gemini LangChain LangGraph Pinecone ChromaDB Vector Databases RAG AI Agents AI Automation Prompt Engineering Embedding Models Function Calling Structured Outputs Semantic Search Knowledge Bases Cloud & DevOps AWS EC2 S3 Lambda RDS Cognito Amplify CloudFront CloudWatch ECS EKS API Gateway Route53 SQS SNS SES IAM Secrets Manager Systems Manager Docker Kubernetes Github Actions Gitlab CI Vercel Railway Netlify DigitalOcean Nginx Terraform Cloudflare Integrations & Payments Stripe PayPal Shopify Twilio SendGrid Mailgun Auth0 OAuth JWT Firebase Auth Clerk Supabase Auth Google APIs Google Maps Google Places Google Analytics HubSpot Salesforce Xero QuickBooks Zapier Make n8n Slack Discord Telegram WhatsApp Business API 💡 What I Build as a Full stack developer ✔️ SaaS Platforms and Business Applications - from MVPs launched in 4-8 weeks to platforms serving thousands of users ✔️ AI Powered Products and Automation Tools - OpenAI integrations chatbots copilots RAG systems AI assistants document processing recommendation engines and AI workflows ✔️ Admin Panels and Internal Dashboards - analytics reporting and operations platforms used by teams of 10-500+ employees ✔️ E commerce and Marketplace Platforms - payment systems subscriptions multi vendor solutions customer portals and business automation ✔️ Real Time Applications and Messaging Systems - WebSockets notifications live updates collaboration tools and event driven architectures ✔️ Payment Subscription and Billing Platforms - Stripe PayPal recurring subscriptions invoicing and custom payment workflows ✔️ CRM ERP and Workflow Management Systems - helping businesses automate processes and reduce manual work by up to 70% ✔️ Mobile Applications for iOS and Android - Flutter React Native Firebase push notifications analytics and cloud integrations ✔️ MVP Development and Existing Product Scaling - from idea validation to long term product growth 🌍 Industries I Work With SaaS & Business Software AI & Automation FinTech Healthcare EdTech E commerce & Marketplaces Real Estate Logistics & Transportation Social & Community Platforms Fitness & Wellness 💼 Recent Project Outcomes Full stack development • Delivered 20+ production ready applications • Built AI powered solutions processing thousands of requests daily • Reduced manual operations by up to 70% through workflow automation • Improved platform performance by up to 60% through architecture optimization • Implemented cloud infrastructure supporting high availability and scalability • Helped startups launch MVPs validate ideas acquire early customers and prepare for fundraising 🤝 How I Work as a Full Stack Developer ✔️ Fluent English and clear communication throughout the entire project ✔️ Progress updates every 1-2 days ✔️ Realistic timelines and transparent estimates ✔️ Scalable architecture and clean maintainable code ✔️ Long term maintainability documentation and knowledge transfer ✔️ Flexible collaboration for both short term projects and long term partnerships ✔️ Fast onboarding into existing codebases and development teams ✔️ Strong focus on reliability performance security and user experience Let's discuss your project and find the fastest path from idea to launch 🎯