GP

Gabriel Payan

Available to hire

I'm a full stack AI engineer who builds production-ready web applications and backend services, with a strong focus on integrating large language models into real business workflows.

About

I’m a full stack AI engineer who builds production-ready web applications and backend services, with a strong focus on integrating large language models into real business workflows. Over the past 8+ years, I’ve combined Python and TypeScript with modern frontend frameworks to deliver reliable features end-to-end from API design and databases to polished React/UX experiences.

Most recently, I’ve worked on retrieval-augmented generation (RAG) and agent-assisted workflows, using tools like Azure OpenAI, LangChain, LangGraph, and vector search to ground AI answers in enterprise knowledge. I enjoy turning requirements into maintainable systems, improving retrieval quality with evaluation and metadata filtering, and deploying scalable containerized services to cloud environments like Azure - while keeping testing, monitoring, and automation firmly in the mix.

  • Joined October 2026

Industry experience

  • Software & Internet
  • Professional Services
  • Computers & Electronics

More experts in Phoenix, United States

Projects · 4

Bakekick - Bakers Marketplace and Community Web App

Bakekick is a bakery owners and buyers marketplace and community web app, I developed their Landing page, Web and mobile app designs with latest develop trend

  • AI Engineer
  • Back-End Developer
  • Full Stack Developer
  • +2
Sayfoone Full-Stack VOIP Calling Platform

Sayfone is a full VOIP calling platform where I worked as the full-stack developer, taking the product from concept to a fully working real-time communication system. I started by shaping the UX/UI and building a clean, responsive interface for calling, chat, and contact management. On the backend, I developed the complete VOIP engine using WebRTC, real-time signaling, secure peer connections, and a scalable server setup to handle call routing, messaging, and user sessions. The final result is a smooth, reliable, Skype-style calling experience with fast call setup, stable audio/video quality.

  • AI Engineer
  • Back-End Developer
  • Full Stack Developer
  • +2
Divorce ai

Divorce AI is an intelligent web platform designed to simplify and manage the complex divorce process using AI-driven guidance. The system streamlines user onboarding and dynamically collects essential information, including assets, income & expenses, debts & liabilities, and children & custody details. It features a structured workflow and a comprehensive dashboard that helps users organize data, track progress, and prepare for filing efficiently. The platform focuses on clarity, automation, and user-friendly navigation to make a legally complex process more manageable and structured.

  • AI Engineer
  • Back-End Developer
  • Full Stack Developer
  • +2
Aegean - Airline Platform(Sitecore, Leaflet)

Aegean is a leading airline brand delivering a high-traffic, customer-facing digital experience for flight booking and travel management. As a Senior Frontend Engineer, I worked on a Sitecore-based platform using Microsoft ASP.NET and AngularJS, contributing to scalable, enterprise-grade features. I also implemented PWA capabilities and Leaflet map integrations to enhance performance, usability, and cross-device user experience.

  • AI Engineer
  • Back-End Developer
  • Full Stack Developer
  • +2

Work experience· 4 roles

Senior Full Stack AI Engineer · AvanadeJun 2023 – Aug 2026 · 3 yrs 3 mos

Designed and developed enterprise AI-enabled web applications using Python, FastAPI, React, and TypeScript, integrating large language models with internal APIs, databases, and business workflows. Built retrieval-augmented generation services with Azure OpenAI, LangChain, and Azure AI Search, improving relevance through metadata filtering, chunking strategies, and evaluation of response quality. Implemented agent-assisted workflows with LangGraph and structured tool interfaces to enable controlled, AI-powered execution of routine business tasks. Developed REST APIs with PostgreSQL-backed services for document processing, user management, and workflow execution, adding authentication, validation, and consistent error handling. Deployed containerized applications to Microsoft Azure using Docker and CI/CD automation, collaborating with stakeholders on architecture, testing, monitoring, and production troubleshooting.

Full Stack Software Engineer · DataArtJan 2021 – May 2023 · 2 yrs 5 mos

Developed enterprise web applications using React, TypeScript, Python, and Node.js, translating product requirements into maintainable frontend and backend features. Built FastAPI and Express.js backend services integrating PostgreSQL, MongoDB, and third-party REST APIs to support business workflows and customer-facing applications. Created reusable React components, dashboards, and authentication workflows across desktop and mobile experiences. Addressed an integration issue where duplicate records could occur after network timeouts by adding idempotency checks, request validation, and controlled retries while preserving compatibility with existing clients. Maintained automated unit and integration tests and supported CI/CD pipelines and production monitoring through code reviews and troubleshooting.

Software Engineer, Full Stack Development · ThoughtworksOct 2018 – Dec 2020 · 2 yrs 3 mos

Built full-stack features for enterprise digital products using JavaScript, TypeScript, React, Node.js, and relational databases. Implemented RESTful API endpoints and reusable backend services for account management, data retrieval, and business process automation. Delivered responsive, accessible frontend components in collaboration with UX designers. Improved slow reporting performance on large datasets by optimizing SQL queries and adding API pagination rather than introducing unnecessary caching infrastructure. Participated in Agile development, code reviews, automated testing, technical documentation, and continuous integration workflows.

Junior Software Developer · SlalomJan 2018 – Sep 2018 · 9 mos

Education

Bachelor of Science in Computer Science · University of Arizona2013 – 2017

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