William Ortiz - Software Developer

Overview

Senior full-stack engineer focused on end-to-end product development across frontend, backend, distributed systems, and cloud. Built production healthcare AI workflows including GenAI agents and RAG pipelines using FastAPI, LangGraph, LlamaIndex, and Pinecone. Also developed enterprise SaaS platforms with event-driven services, integrations, and reliable deployments on AWS.

Technical skills

JavaScript• Senior • 10y+

Node JS• Senior • 10y+

TypeScript• Senior • 10y+

Go• Middle • 3y+

Python• Junior

Python

FastAPI

Flask

Pydantic

Databases

Supabase

MySQL• 10y+

PostgreSQL• 7y+

pgvector• 3y+

Redis• 3y+

DynamoDB

Pinecone

RabbitMQ

AI/ML

AI Agents

Claude

Multimodal AI

Embeddings• 3y+

LangChain• 3y+

RAG• 3y+

Semantic Search• 3y+

LangGraph

LlamaIndex

LLM

Frontend

React.js• 10y+

GraphQL• 7y+

Next.js

DevOps

Azure

GCP

Jenkins

PagerDuty

Terraform

CI/CD• 10y+

Docker• 10y+

Kubernetes• 10y+

Rest API• 10y+

AWS• 7y+

gRPC• 3y+

AWS Lambda

QA

Cypress• 7y+

Jest• 7y+

Timeline

Senior Software Engineer • Senior

Viz.ai • Full-Time

Oct 2024 to Present 1 Year 10 Months In office

Built clinician-facing healthcare applications and production services for medical imaging and care-coordination workflows. Migrated legacy Flask services to FastAPI with async endpoints and validation, improving API contracts and service boundaries. Developed GenAI workflows using LangGraph and LLM APIs, including RAG pipelines with LlamaIndex and Pinecone, and designed stateful agent behaviors with tool calling and guardrails. Implemented event-driven microservices and deployed them on AWS with observability, testing, and CI/CD for production AI.

AWS

AWS Lambda

JavaScript

TypeScript

Python

FastAPI

Flask

Pydantic

Next.js

React.js

LangGraph

LangChain

LLM

LlamaIndex

Pinecone

RAG

Embeddings

Rest API

PostgreSQL

DynamoDB

Redis

RabbitMQ

Docker

CI/CD

gRPC

Software Engineer • Middle

Pylon • Full-Time

Jan 2023 to Oct 2024 1 Year 9 Months In office

Developed a B2B customer-support platform focused on Slack and Microsoft Teams experiences and expanded it into ticketing, email, and AI-assisted support. Built full-stack features with React and TypeScript, and designed Go microservices with gRPC APIs for routing, SLAs, notifications, search, and workflow execution. Implemented event-driven integrations with major external systems and introduced LLM-assisted triage and suggestions using LangChain and OpenAI APIs. Created early RAG workflows with PostgreSQL/pgvector, embeddings, and semantic search, and improved reliability with AWS infrastructure and CI/CD.

AWS

Docker

CI/CD

TypeScript

React.js

Node JS

Go

GraphQL

PostgreSQL

gRPCsince 2023

Redissince 2023

pgvector

Embeddingssince 2023

Semantic Search

LangChainsince 2023

RAGsince 2023

Rest API

Fullstack Engineer • Middle

Retool • Full-Time

Sep 2019 to Dec 2022 3 Years 3 Months In office

Worked on a developer platform for building data-driven internal applications and connecting databases and business systems. Implemented frontend application-builder capabilities with React and TypeScript, including reusable components and state management for complex tools. Built backend services and secure data-source integrations supporting PostgreSQL, MySQL, REST, and GraphQL, along with workflow features like scheduled jobs, webhooks, ETL tasks, and retries. Supported enterprise deployments and improved quality with Jest, Cypress, observability, and CI/CD.

AWSsince 2019

Docker

Kubernetes

CI/CD

Jest

Cypress

JavaScript

TypeScriptsince 2019

React.js

Node JS

PostgreSQLsince 2019

MySQL

GraphQLsince 2019

Rest API

Software Engineer • Middle

Box • Full-Time

May 2016 to Aug 2019 3 Years 3 Months In office

Built enterprise collaboration and content management features for securely storing, sharing, and governing business documents across organizations. Implemented frontend capabilities in React and JavaScript for browsing, uploading, previewing, searching, and collaboration using Box APIs. Developed Node.js and Java backend services for content access, permissions, shared links, versions, and integrations, and built event-driven workflows for review and approvals. Enhanced deployments and testing with Docker, Kubernetes, CI/CD, and monitoring while integrating external systems via REST APIs and OAuth-style authentication.

Dockersince 2016

Kubernetessince 2016

CI/CDsince 2016

JavaScriptsince 2016

React.jssince 2016

Node JSsince 2016

Rest APIsince 2016

MySQLsince 2016