09/02/2026 updated
Premium member
100 % availableSenior Full-Stack AI Engineer | JavaScript, Python, LangChain, AWS
Arlington, USA
Only remote
Bachelor's in Computer ScienceAI AgentsRAGLLMJavaScriptApplication Programming Interfaces (APIs)Amazon Web ServicesSoftware as a ServiceCloud EngineeringDevOpsDjangoPython (Programming Language)Node.jsNext.jsMulti-Agent SystemsBackend
Full-Stack Web Development
Expertise in building high-performance web applications using JavaScript, TypeScript, React, Next.js, Node.js, ExpressJS, NestJS, and Tailwind CSS, covering both frontend and backend development for SaaS products and client-facing platforms.
AI & LLM Application Development
Hands-on experience developing AI-powered applications, including AI agents, chatbots, and LLM-powered products using LangChain, Pinecone, pgvector, FastAPI, and prompt engineering techniques such as few-shot examples and RAG workflows.
Cloud Infrastructure & DevOps
Proven ability to design, deploy, and maintain cloud-native solutions on AWS, including CI/CD pipelines, Docker-based deployments, and scalable backend architectures, improving system reliability and reducing deployment time.
PostgreSQL & Database Optimization
Modeling relational data and optimizing complex queries in PostgreSQL to improve API response times and overall system reliability.
REST API Design
Design and implementation of RESTful APIs using Node.js, ExpressJS, NestJS, and FastAPI to handle authentication, data ingestion, reporting, and third-party integrations.
Prompt Engineering & Evaluation
Designing and iterating on prompt strategies for chat, summarization, extraction, and reasoning tasks, including building prompt evaluation and regression testing pipelines to measure accuracy and response consistency.
React Native & Mobile Development
Experience with React Native for cross-platform mobile application development as part of a broad full-stack skill set.
Testing & Quality Assurance
Utilization of testing frameworks such as Jest and Cypress for unit, integration, and end-to-end testing to ensure code quality and reliability.
Agile & Collaborative Development
Strong collaborator with product, design, and engineering teams, working within Agile methodologies and using Git-based version control for code reviews, refactoring, and feature delivery.
Expertise in building high-performance web applications using JavaScript, TypeScript, React, Next.js, Node.js, ExpressJS, NestJS, and Tailwind CSS, covering both frontend and backend development for SaaS products and client-facing platforms.
AI & LLM Application Development
Hands-on experience developing AI-powered applications, including AI agents, chatbots, and LLM-powered products using LangChain, Pinecone, pgvector, FastAPI, and prompt engineering techniques such as few-shot examples and RAG workflows.
Cloud Infrastructure & DevOps
Proven ability to design, deploy, and maintain cloud-native solutions on AWS, including CI/CD pipelines, Docker-based deployments, and scalable backend architectures, improving system reliability and reducing deployment time.
PostgreSQL & Database Optimization
Modeling relational data and optimizing complex queries in PostgreSQL to improve API response times and overall system reliability.
REST API Design
Design and implementation of RESTful APIs using Node.js, ExpressJS, NestJS, and FastAPI to handle authentication, data ingestion, reporting, and third-party integrations.
Prompt Engineering & Evaluation
Designing and iterating on prompt strategies for chat, summarization, extraction, and reasoning tasks, including building prompt evaluation and regression testing pipelines to measure accuracy and response consistency.
React Native & Mobile Development
Experience with React Native for cross-platform mobile application development as part of a broad full-stack skill set.
Testing & Quality Assurance
Utilization of testing frameworks such as Jest and Cypress for unit, integration, and end-to-end testing to ensure code quality and reliability.
Agile & Collaborative Development
Strong collaborator with product, design, and engineering teams, working within Agile methodologies and using Git-based version control for code reviews, refactoring, and feature delivery.
Experience
Professional experience5 - 10 years
Freelancer since2018
Languages
EnglishFluent
Project history
Owned development of an AI-powered customer support and knowledge assistant built with Next.js, React, TypeScript, and Tailwind CSS. Designed a modular backend architecture with Node.js and PostgreSQL. Integrated LangChain, Pinecone, and pgvector for semantic search and AI agent workflows. Built production-ready AI chatbots using Python and FastAPI, reducing customer support resolution time by 45%. Deployed and maintained cloud infrastructure on AWS, reducing deployment time by 40%.
Designed and iterated on prompt strategies for chat, summarization, extraction, and reasoning tasks across multiple LLM-powered products. Built structured system prompts and constraint-based outputs for consistent JSON and tool-call responses. Developed RAG workflows with LangChain, Pinecone, and pgvector. Integrated prompt logic into production APIs using FastAPI and frontend applications built with React and Next.js. Created prompt evaluation and regression testing pipelines.
Built multi-tenant web applications for client dashboards, admin panels, and internal tools using React, Next.js, and TypeScript. Implemented REST APIs with Node.js, ExpressJS, and NestJS. Modeled relational data and optimized complex queries in PostgreSQL. Deployed and monitored applications on AWS ensuring scalability and high availability.