JEFF SMITH

Lead Full Stack Software Engineer | AI Platform Engineer

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Areas of Expertise

Micro-service architecture, REST APIs, .NET services, Authentication and Authorization, Front-end web development, Amazon Web Services (AWS), Infrastructure as Code (IAC), Clean code refactoring, CI/CD, Test Automation

Programming Languages

Python, TypeScript, JavaScript, C#, Ruby, Rust, Kotlin, Java

Databases

PostgreSQL, pgvector, JSONB, HNSW indexing, Microsoft SQL Server, MongoDB, MariaDB, DynamoDB, data modeling, SQL, NoSQL

Education

BS Computer Science
Portland State University

Qualification Highlights

AI / LLM Platform Engineering

Multi-agent systems, agent orchestration, OpenAI-compatible APIs, tool calling / function calling, RAG, hybrid vector + full-text search, incremental embeddings, llama.cpp, MCP (Model Context Protocol), context management, agent memory

API Architecture and Development

Micro-services architectural design, REST, .NET, ASP.NET, GraphQL, WebSockets, Server-Sent Events (SSE), event-driven architecture, FastAPI, RabbitMQ, OpenAPI

Identity Management & Security

IAM, Cognito, Microsoft.Identity, OAuth2, OpenID Connect, SSO, JWT, SAML, API key authentication, encryption, HIPAA, HITRUST

Front-End Development

React 19, TypeScript, Tailwind CSS, Material UI, real-time web applications, responsive design, accessibility, globalization, Vite, HTML5, CSS3, Node.js

Back-End Development

FastAPI, Uvicorn, Pydantic, SQLAlchemy 2.0 (async), ASP.NET, ServiceStack, Quartz.NET, Dapper.NET, RabbitMQ, MassTransit, OpenIddict, GraphQL, Swagger, Node.js, asyncpg

Cloud Services, Hosting, DevOps, CI/CD

AWS (EC2, RDS, IAM, SQS, SNS, EKS, Route53, S3, Lambda, Cognito, g5 GPU instances), Ansible, Terraform, Kubernetes, Git, Bitbucket, CircleCI, Linux, performance and cost analysis

Monitoring, Test Automation, and Scripting

pytest, Vitest, Playwright, Cypress, k6, Jest, Selenium, NUnit, Bash, PowerShell, Prometheus, Grafana, New Relic, Splunk, Postman

Professional Experience

Founder | Principal AI Engineer03/2019 - Present

Code Smiths LLC - Portland, OR

Architected, built, and production-deployed a multi-agent collaborative chat platform under Code Smiths LLC: FastAPI + WebSockets, React 19 + TypeScript, PostgreSQL 16 + pgvector, hybrid vector + full-text search, streaming LLM responses, user sessions, RAG pipelines
Built an OpenAI-compatible REST API supporting streaming SSE + WebSocket responses, function calling, tool use, chat history, prompt caching, and multi-model routing across GPT, Claude, Gemini, and Llama with prompt templates, fallback models, rate limiting, and observability
Designed and deployed a production RAG pipeline (PDF/Docx/HTML parsing, LangChain chunking, pgvector HNSW indexing, hybrid dense + sparse retrieval, reranking, citation-aware retrieval) on PostgreSQL 16 with pgvector HNSW vector search, JSONB metadata, and 20M+ vectors indexed
Implemented GPU-accelerated LLM inference on AWS g5 instances with llama.cpp, vLLM, and vLLM proxy API, achieving sub-500ms response times on 8B parameter models
Engineered a multi-agent orchestration system with LangGraph and CrewAI featuring 5+ specialized agents (research, analysis, coding, writing, review), shared memory, task delegation, parallel execution, human-in-the-loop approval gates, and tool use (web search, code execution, PDF generation)
Built real-time AI agent workspace with WebSocket-driven collaborative editing, agent activity feeds, tool execution logs, and streaming responses
Implemented OAuth2 / OpenID Connect with AWS Cognito for user auth, JWT-based API auth, and SSO across multi-tenant SaaS deployment
Deployed on AWS (EC2, ECS, RDS PostgreSQL, SQS, S3, CloudFront, Route53) with CI/CD (CircleCI), Infrastructure as Code (Ansible, Terraform), monitoring (Prometheus, Grafana, New Relic, Splunk)

Lead Software Engineer01/2018 - 03/2019

Code Smiths LLC

Led development of a microservices-based SaaS platform serving 10K+ users with real-time collaboration, multi-tenancy, and complex business workflows
Architected event-driven message processing pipeline using RabbitMQ with 99.9% message delivery guarantees
Mentored team of 5 engineers on clean code practices, test-driven development, and CI/CD optimization

Senior Software Engineer2012 - 2018

Built and maintained enterprise web applications in C#, ASP.NET, and JavaScript for healthcare, finance, and logistics domains
Implemented HIPAA-compliant systems with audit logging, role-based access control, and encryption at rest
Led migration of legacy monoliths to microservices architecture, reducing deployment time by 70%