Got a wild idea? 💡 You bring the vision, I'll bring the magic!
Got a wild idea? 💡
You bring the vision, I’ll bring the magic!
Let’s make it real!! 🚀
I’m Leon Nowakowski, a full-stack AI-focused web and mobile developer with 6+ years of experience building scalable SaaS platforms, cross-platform applications, and practical AI-powered products. I combine strong engineering skills with product-minded thinking—turning ideas into production-ready systems using modern React/Next.js, Node.js, Python, and mobile development with React Native, Flutter, and native iOS/Android.
Across my roles, I’ve integrated LLMs, built RAG and retrieval pipelines, and delivered AI agents and automation workflows that improve real business outcomes. I’ve led technical implementation across authentication, billing, dashboards, cloud deployments (AWS/GCP), and data modeling, while partnering closely with product/design teams to ship fast and maintain reliable architectures.
An intelligent platform designed to support culinary students and instructors with real-time recipe guidance, step-by-step cooking instructions, ingredient substitutions, safety tips, and personalized feedback — enhancing learning through interactive and hands-on experiences. React Native Node.js Generative AI AI Development TypeScript
Cutting-edge AI platform that harnesses the power of AI to revolutionize the home and interior design process. Allowing users to create and visualize their ideal living spaces simplifies the design journey for homeowners. The platform generates personalized design solutions based on user preferences, space constraints, and design inspirations, making it accessible to individuals with varying levels of design experience.
Designed and developed a full-stack AI healthcare platform that delivers personalized medical insights, lab interpretation, and clinical decision support. Built scalable LLM pipelines integrated with structured medical data and knowledge bases, enabling real-time health assistance for patients and healthcare providers. The system supports multi-user environments and processes high-volume queries while maintaining accuracy and reliability.
Built and deployed AI-powered applications using LLMs, generative AI, conversational AI, and custom GPT systems. Developed AI voice agents with integrations (e.g., ElevenLabs) and created AI image generation pipelines for multimodal experiences. Created multi-agent AI systems for automation and intelligent task handling across different domains. Delivered end-to-end AI-native products by integrating backend systems, AI models, and user-facing interfaces into scalable solutions. Built full-stack web and mobile apps using React, Next.js, React Native, Flutter, and Python backends.
Designed and built end-to-end SaaS platforms for startups and mid-market clients, covering authentication, subscription billing, multi-tenant dashboards, and cloud deployment. Led integration of OpenAI and Anthropic APIs into 8+ client products, including a RAG-based support assistant that reduced customer response time by over 50% for a healthcare SaaS vertical. Architected vector databases and retrieval pipelines (Pinecone) for AI search and recommendations, reducing query latency by 40%. Owned cloud infrastructure decisions across AWS/GCP and performed cost optimizations that reduced monthly infrastructure spending by 30%, serving as the primary technical lead across product and engineering stakeholders.
Developed backend services and REST APIs using Python/FastAPI and Node.js, integrating third-party tools including Stripe, analytics platforms, and CRM systems. Contributed to early firm machine learning efforts by building initial ML model integration and data pipeline work for client products entering the AI feature space. Designed database schemas for multi-tenant SaaS usage patterns using PostgreSQL and MongoDB, and worked in cross-functional pods (design, QA, engineering) to deliver features on fast two-week sprint cycles.
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