Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

Build Scalable SaaS, Web & Mobile Applications That Actually Ship 🚀 I help startups and businesses build high-performance SaaS applications, web applications, and mobile apps using Next.js, React, Node.js, and modern full-stack technologies. As a Full-Stack Developer, I specialize in SaaS development, AI app development, and API integration — delivering real products that are fast, scalable, and production-ready. If you're looking for a developer experienced in Next.js, React, Node.js, React Native, and AI development, you're in the right place. What you get working with me: ⚡ Fast MVP development for SaaS and web applications Launch your SaaS product, AI app, or web application quickly using Next.js, React, and Node.js. 🧩 Full-stack development (frontend + backend) Clean, scalable development using JavaScript, Tailwind CSS, Node.js, and FastAPI. 🤖 AI development & AI chatbot integration Build AI chatbots, AI-powered apps, and automation tools using OpenAI API, LLM prompting, and modern AI workflows. 🔗 API integration & backend systems Robust API integration with OpenAI API, Supabase, and third-party services. 📈 Scalable SaaS architecture Multi-tenant SaaS applications using Supabase, PostgreSQL, and scalable backend systems. What I build: • SaaS applications (multi-tenant SaaS, dashboards, authentication, payments) • Web applications using Next.js, React, Tailwind CSS, and JavaScript • Mobile apps using React Native • AI apps and AI chatbot systems using OpenAI API and LLM prompt engineering • Backend APIs using Node.js and FastAPI • API integrations with OpenAI API, Supabase, and external platforms Core skills & technologies: Next.js, React, Node.js, React Native, Tailwind CSS, JavaScript, FastAPI SaaS Development, Web Application Development, Mobile App Development AI Development, AI App Development, AI Chatbot Development OpenAI API, LLM Prompt Engineering, API Integration, Supabase Why clients choose me: ✔ Strong experience in Next.js, React, and Node.js development ✔ Real-world SaaS application development experience ✔ Clean, scalable, and maintainable code ✔ Focus on performance, scalability, and user experience If you're building a SaaS application, AI-powered app, web application, or mobile app using Next.js, React, Node.js, or OpenAI API — I can help you design, build, and launch it successfully. 📩 Message me to start your SaaS, AI app, or web application today.…Build Scalable SaaS, Web & Mobile Applications That Actually Ship 🚀 I help startups and businesses build high-performance SaaS applications, web applications, and mobile apps using Next.js, React, Node.js, and modern full-stack technologies. As a Full-Stack Developer, I specialize in SaaS development, AI app development, and API integration — delivering real products that are fast, scalable, and production-ready. If you're looking for a developer experienced in Next.js, React, Node.js, React Native, and AI development, you're in the right place. What you get working with me: ⚡ Fast MVP development for SaaS and web applications Launch your SaaS product, AI app, or web application quickly using Next.js, React, and Node.js. 🧩 Full-stack development (frontend + backend) Clean, scalable development using JavaScript, Tailwind CSS, Node.js, and FastAPI. 🤖 AI development & AI chatbot integration Build AI chatbots, AI-powered apps, and automation tools using OpenAI API, LLM prompting, and modern AI workflows. 🔗 API integration & backend systems Robust API integration with OpenAI API, Supabase, and third-party services. 📈 Scalable SaaS architecture Multi-tenant SaaS applications using Supabase, PostgreSQL, and scalable backend systems. What I build: • SaaS applications (multi-tenant SaaS, dashboards, authentication, payments) • Web applications using Next.js, React, Tailwind CSS, and JavaScript • Mobile apps using React Native • AI apps and AI chatbot systems using OpenAI API and LLM prompt engineering • Backend APIs using Node.js and FastAPI • API integrations with OpenAI API, Supabase, and external platforms Core skills & technologies: Next.js, React, Node.js, React Native, Tailwind CSS, JavaScript, FastAPI SaaS Development, Web Application Development, Mobile App Development AI Development, AI App Development, AI Chatbot Development OpenAI API, LLM Prompt Engineering, API Integration, Supabase Why clients choose me: ✔ Strong experience in Next.js, React, and Node.js development ✔ Real-world SaaS application development experience ✔ Clean, scalable, and maintainable code ✔ Focus on performance, scalability, and user experience If you're building a SaaS application, AI-powered app, web application, or mobile app using Next.js, React, Node.js, or OpenAI API — I can help you design, build, and launch it successfully. 📩 Message me to start your SaaS, AI app, or web application today.

Leo Morgan

Full Stack Developer, AI Engineer, Software Engineer, +2





Build Scalable SaaS, Web & Mobile Applications That Actually Ship 🚀 I help startups and businesses build high-performance SaaS applications, web applications, and mobile apps using Next.js, React, Node.js, and modern full-stack technologies. As a Full-Stack Developer, I specialize in SaaS development, AI app development, and API integration — delivering real products that are fast, scalable, and production-ready. If you're looking for a developer experienced in Next.js, React, Node.js, React Native, and AI development, you're in the right place. What you get working with me: ⚡ Fast MVP development for SaaS and web applications Launch your SaaS product, AI app, or web application quickly using Next.js, React, and Node.js. 🧩 Full-stack development (frontend + backend) Clean, scalable development using JavaScript, Tailwind CSS, Node.js, and FastAPI. 🤖 AI development & AI chatbot integration Build AI chatbots, AI-powered apps, and automation tools using OpenAI API, LLM prompting, and modern AI workflows. 🔗 API integration & backend systems Robust API integration with OpenAI API, Supabase, and third-party services. 📈 Scalable SaaS architecture Multi-tenant SaaS applications using Supabase, PostgreSQL, and scalable backend systems. What I build: • SaaS applications (multi-tenant SaaS, dashboards, authentication, payments) • Web applications using Next.js, React, Tailwind CSS, and JavaScript • Mobile apps using React Native • AI apps and AI chatbot systems using OpenAI API and LLM prompt engineering • Backend APIs using Node.js and FastAPI • API integrations with OpenAI API, Supabase, and external platforms Core skills & technologies: Next.js, React, Node.js, React Native, Tailwind CSS, JavaScript, FastAPI SaaS Development, Web Application Development, Mobile App Development AI Development, AI App Development, AI Chatbot Development OpenAI API, LLM Prompt Engineering, API Integration, Supabase Why clients choose me: ✔ Strong experience in Next.js, React, and Node.js development ✔ Real-world SaaS application development experience ✔ Clean, scalable, and maintainable code ✔ Focus on performance, scalability, and user experience If you're building a SaaS application, AI-powered app, web application, or mobile app using Next.js, React, Node.js, or OpenAI API — I can help you design, build, and launch it successfully. 📩 Message me to start your SaaS, AI app, or web application today.…Build Scalable SaaS, Web & Mobile Applications That Actually Ship 🚀 I help startups and businesses build high-performance SaaS applications, web applications, and mobile apps using Next.js, React, Node.js, and modern full-stack technologies. As a Full-Stack Developer, I specialize in SaaS development, AI app development, and API integration — delivering real products that are fast, scalable, and production-ready. If you're looking for a developer experienced in Next.js, React, Node.js, React Native, and AI development, you're in the right place. What you get working with me: ⚡ Fast MVP development for SaaS and web applications Launch your SaaS product, AI app, or web application quickly using Next.js, React, and Node.js. 🧩 Full-stack development (frontend + backend) Clean, scalable development using JavaScript, Tailwind CSS, Node.js, and FastAPI. 🤖 AI development & AI chatbot integration Build AI chatbots, AI-powered apps, and automation tools using OpenAI API, LLM prompting, and modern AI workflows. 🔗 API integration & backend systems Robust API integration with OpenAI API, Supabase, and third-party services. 📈 Scalable SaaS architecture Multi-tenant SaaS applications using Supabase, PostgreSQL, and scalable backend systems. What I build: • SaaS applications (multi-tenant SaaS, dashboards, authentication, payments) • Web applications using Next.js, React, Tailwind CSS, and JavaScript • Mobile apps using React Native • AI apps and AI chatbot systems using OpenAI API and LLM prompt engineering • Backend APIs using Node.js and FastAPI • API integrations with OpenAI API, Supabase, and external platforms Core skills & technologies: Next.js, React, Node.js, React Native, Tailwind CSS, JavaScript, FastAPI SaaS Development, Web Application Development, Mobile App Development AI Development, AI App Development, AI Chatbot Development OpenAI API, LLM Prompt Engineering, API Integration, Supabase Why clients choose me: ✔ Strong experience in Next.js, React, and Node.js development ✔ Real-world SaaS application development experience ✔ Clean, scalable, and maintainable code ✔ Focus on performance, scalability, and user experience If you're building a SaaS application, AI-powered app, web application, or mobile app using Next.js, React, Node.js, or OpenAI API — I can help you design, build, and launch it successfully. 📩 Message me to start your SaaS, AI app, or web application today.

Available to hire

Accrington, United Kingdom

Build Scalable SaaS, Web & Mobile Applications That Actually Ship 🚀

I help startups and businesses build high-performance SaaS applications, web applications, and mobile apps using Next.js, React, Node.js, and modern full-stack technologies.

As a Full-Stack Developer, I specialize in SaaS development, AI app development, and API integration — delivering real products that are fast, scalable, and production-ready.

If you’re looking for a developer experienced in Next.js, React, Node.js, React Native, and AI development, you’re in the right place.

What you get working with me:

⚡ Fast MVP development for SaaS and web applications
Launch your SaaS product, AI app, or web application quickly using Next.js, React, and Node.js.

🧩 Full-stack development (frontend + backend)
Clean, scalable development using JavaScript, Tailwind CSS, Node.js, and FastAPI.

🤖 AI development & AI chatbot integration
Build AI chatbots, AI-powered apps, and automation tools using OpenAI API, LLM prompting, and modern AI workflows.

🔗 API integration & backend systems
Robust API integration with OpenAI API, Supabase, and third-party services.

📈 Scalable SaaS architecture
Multi-tenant SaaS applications using Supabase, PostgreSQL, and scalable backend systems.

What I build:

• SaaS applications (multi-tenant SaaS, dashboards, authentication, payments)
• Web applications using Next.js, React, Tailwind CSS, and JavaScript
• Mobile apps using React Native
• AI apps and AI chatbot systems using OpenAI API and LLM prompt engineering
• Backend APIs using Node.js and FastAPI
• API integrations with OpenAI API, Supabase, and external platforms

Core skills & technologies:

Next.js, React, Node.js, React Native, Tailwind CSS, JavaScript, FastAPI
SaaS Development, Web Application Development, Mobile App Development
AI Development, AI App Development, AI Chatbot Development
OpenAI API, LLM Prompt Engineering, API Integration, Supabase

Why clients choose me:

✔ Strong experience in Next.js, React, and Node.js development
✔ Real-world SaaS application development experience
✔ Clean, scalable, and maintainable code
✔ Focus on performance, scalability, and user experience

If you’re building a SaaS application, AI-powered app, web application, or mobile app using Next.js, React, Node.js, or OpenAI API — I can help you design, build, and launch it successfully.

📩 Message me to start your SaaS, AI app, or web application today.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

AI Full-Stack Engineer at Decagon

October 31, 2023 - November 30, 2025

Led frontend architecture using React to build scalable, responsive enterprise UI interfaces, applying advanced state management patterns (Redux Toolkit, Context API), performance profiling, memoization, lazy loading, and reusable design-system components. Developed backend RESTful APIs with Python (FastAPI), including validation, authentication (JWT/OAuth), and database transactions with PostgreSQL schema design and query optimization. Debugged and refactored legacy Python services and frontend modules to reduce production incidents. Built production RAG pipelines using LangChain and LangGraph, integrating vector databases (FAISS/Pinecone) and implementing deterministic agent orchestration via LangGraph state machines with retries and fallback handling. Deployed and maintained end-to-end AI workflows supported by robust reliability and scalability practices.

AI/ML Engineer – LLM Systems at Instinctools

December 31, 2021 - September 30, 2023

Built LLM-powered intelligent agents for customer support and internal operations, reducing manual workload (~60%) and improving response times. Designed agent pipelines for intent detection, decision logic, tool execution, and response generation, improving automation reliability and consistency. Implemented RAG-enabled agent systems that retrieved enterprise knowledge dynamically to improve answer accuracy and reduce hallucinations. Created robust Python orchestration frameworks for agent state management, retries, fallbacks, and execution paths to increase resilience. Deployed and monitored agentic AI services on AWS using Docker and Kubernetes to achieve high availability and scalable throughput, collaborating with product, data, and platform teams to integrate agent-based AI into enterprise SaaS workflows.

Full-Stack Software Engineer (Python / React) at Fusionbox (Remote)

January 1, 2020 - December 1, 2021

Developed scalable backend services using Django and Flask for data-intensive applications and ML-driven features. Improved database schema design and query performance to reduce system response times and database load (~30%). Implemented CI/CD pipelines and automated testing to increase release reliability and reduce production defects. Built and deployed secure, auditable LLM-powered agent systems for automating and validating complex internal financial documentation workflows, supporting data consistency and internal compliance. Delivered modern React UIs for internal tools and analytics, including routing, controlled forms, API integration, and frontend validation/error handling. Refactored legacy Angular modules into React-based architecture to improve maintainability and performance (~30%). Integrated event-driven pipelines using Kafka for scalability and decoupling.

Software Engineer – Python & Automation at Ighty Support

March 1, 2017 - December 1, 2019

Built Python-based automation and data processing tools supporting backend services and ML experimentation. Applied algorithmic and data structure optimizations to improve efficiency and reduce compute overhead. Contributed to early-stage ML feature development by integrating models into backend services and workflows. Supported rapid iteration in a fast-paced environment while balancing feature delivery with system stability.

Software Engineer – Automation & Testing at Optum

February 28, 2016 - December 30, 2016

Developed automation frameworks that reduced manual testing effort and improved regression coverage across healthcare systems. Automated functional, regression, and performance test suites using Python, C/C++, Java, and VB. Led load and performance testing for production releases to validate scalability and stability. Tested healthcare applications handling X12, JSON, XML, and text-based claims using MySQL, MongoDB, and Cassandra. Led and mentored a team of 5 engineers during critical delivery phases and was recognized by leadership and clients for execution and ownership, working across Agile, Incremental, and Waterfall methodologies.