Open to opportunities

Tim Dunn

@timdunn

Message

Senior fullstack developer delivering rapid performance improvements and reliable production systems.

United States

Message

What I'm looking for

I seek remote fullstack or backend roles where I can optimize performance, ship fast, work across Rails/Python/React stacks, and support mission-critical systems.

I am a senior fullstack software engineer with 8+ years building production web applications in Ruby on Rails, Python, and React, focused on jumping into existing codebases and shipping working code rapidly.

I have a proven track record of dramatic performance optimizations and reliable launches: 10x query performance gains on mission-critical systems, an 80% database query reduction, MVP delivery with zero production bugs, and 22 products shipped including PWAs and Chrome extensions.

I enjoy solving backend bottlenecks, building integrations (HL7/FHIR), and maintaining systems at scale while practicing TDD and automation to ensure maintainability and fast delivery.

Experience

Work history, roles, and key accomplishments

Current

Public Health Informatics Scientist

Current

Southern Nevada Health

Jan 2025 - Present (1 year 2 months)

Delivered 10x performance gains on disease surveillance queries and built HL7/FHIR healthcare data integrations using Python/Flask, maintaining production systems serving thousands of healthcare professionals across Nevada.

Python Flask HL7 FHIR PostgreSQL Rails Performance Tuning REST APIs ETL

Current

Freelance Fullstack Developer

Current

Dunn Web Studio

Jan 2018 - Present (8 years 2 months)

Independent contract fullstack developer delivering 22 products for startups and companies, building web apps, PWAs, and automation pipelines processing 50,000+ records with Ruby on Rails, Python, and React.

Ruby on Rails Python React PostgreSQL Selenium Automation REST APIs TDD

Software Engineer

Farmlink Project

Apr 2021 - Oct 2021 (6 months)

Built produce-to-food-bank matching platform from scratch with Rails, GraphQL, Elasticsearch, and PostgreSQL; launched MVP in 4 months with zero production bugs using strict TDD.

Ruby on Rails GraphQL Elasticsearch PostgreSQL RSpec TDD Integration Testing DevOps

Software Engineer

Performant Software Solutions

Nov 2019 - Oct 2020 (11 months)

Provided fullstack Rails development for digital humanities research platforms, contributing across React, Ember, and Backbone.js microservices to deliver feature-rich research tools.

Ruby on Rails React Ember Backbone.Js JavaScript API Integration PostgreSQL Frontend Development

Software Engineer

Pwnie Express

Jul 2018 - Nov 2019 (1 year 4 months)

Optimized Rails/PostgreSQL backend to cut database query times 80% and doubled page speed for a cybersecurity SaaS platform while building React front-end reporting features.

Ruby on Rails PostgreSQL React Performance Optimization JavaScript API Development Monitoring CI CD

Software Engineer

Nathan Research

Apr 2016 - Jun 2017 (1 year 2 months)

Built a multi-level marketing platform using Rails and Neo4j and created an API generator tool that produced tests, controllers, and models from configuration templates.

Ruby on Rails Neo4j API Design Automation JavaScript SQL Backend Development