Freelance Fullstack Engineers in Denver

Freelance Fullstack Engineers in DenverFreelance Fullstack Engineers in Denver

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Software Engineer | JavaScript, React, Python, SQL, Flask

Software Engineer | JavaScript, React, Python, SQL, Flask

Cover image for Personal Portfolio Website Development

Personal Portfolio Website Development

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Cover image for Paws-ibilities Rescue Web Application

Paws-ibilities Rescue Web Application

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3

Cover image for Branded Book Collection Website Design

Branded Book Collection Website Design

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3

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Fullstack Engineer(2)

Full stack developer with 13 years of experience.

New to Contra

Full stack developer with 13 years of experience.

Cover image for Zero-JavaScript Astro one-page site with

Zero-JavaScript Astro one-page site with Lighthouse 98+, WCAG 2.1 AA compliance, and AI discovery optimization. Built the exact kind of site I want to be hired to build. One-page portfolio site for my own creative studio, built to demonstrate the performance and accessibility work I offer clients. Astro 5 static site with zero JavaScript shipped to the browser. CSS Custom Properties for theming, self-hosted WOFF2 fonts (no third-party requests), deployed on Cloudflare Pages. Lighthouse scores consistently 98-100 across performance, accessibility, best practices, and SEO. WCAG 2.1 AA compliant with tested color contrast, keyboard navigation, and semantic HTML throughout. AI discovery optimized with structured content designed for LLM retrieval. ::Live at elementalsugar.com (http://elementalsugar.com).

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Cover image for Full-stack Rails development for an

Full-stack Rails development for an RV camping discovery platform serving 750,000+ members across 39,000+ campgrounds with 170,000+ user reviews. Enhanced Mapbox-based campground discovery with advanced filtering by amenity, price, and accessibility. Implemented cross-brand OAuth supporting single sign-on across Roadpass Digital's portfolio of travel products. Optimized PostgreSQL queries and refactored legacy code, reducing page load times by ~30% on high-traffic search pages. Built Segment analytics tracking user behavior across discovery and booking flows. Standardized React and Stimulus components into a shared library with RSpec test coverage across 3 Rails applications.

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Cover image for Enterprise marketing site migration for

Enterprise marketing site migration for a food safety SaaS company. Two full builds: initial Astro + DatoCMS implementation, then a ground-up Next.js 14 migration with a modular block system so marketing could independently build, preview, and publish landing pages without developer involvement. Built a custom TypeScript component library with GraphQL type safety, reducing new page build time from days to hours. Migrated 246 blog posts and 32 landing pages with zero data loss, maintaining SEO rankings through redirect mapping and metadata preservation. Drove Lighthouse scores from the high 80s to 98-99. Documentation doubled as developer onboarding and AI context, so SafetyChain's own developers could ship features directly from the docs.

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Cover image for Multi-year technical partnership (2019-present) for

Multi-year technical partnership (2019-present) for a women-only off-road navigation rally across Nevada and California. Work has spanned WordPress, custom plugins, a real-time GPS tracking dashboard (React + Mapbox, 65+ vehicles with satellite failover), scoring system modernization, and live broadcast graphics. Most recent: browser-based live overlay system for OBS/vMix. Built a PHP API layer on top of the existing scoring database without touching the scoring logic, then created JavaScript overlays that production controls in real-time. Standings, challenge results, sponsor graphics, all running as transparent overlays during the 2025 rally. Also built a team bio pipeline (JotForm to WordPress, 130+ profiles/season) and Arduino-based vehicle telemetry hardware for areas with zero cell coverage.

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Fullstack Engineer(4)

Software Engineer || Data Analyst || Musician

Software Engineer || Data Analyst || Musician

Cover image for FAQ Application

FAQ Application

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Cover image for Time Tracker

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3

Cover image for Money Transfer Application

Money Transfer Application

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Cover image for Vending Machine Application

Vending Machine Application

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Fullstack Engineer(5)

Fullstack Engineer Crafting Scalable Solutions

Fullstack Engineer Crafting Scalable Solutions

Cover image for HomeHopper: Your Gateway to Seamless Vacation Rentals

HomeHopper: Your Gateway to Seamless Vacation Rentals

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Cover image for BoundTogether: A Social Media Application

BoundTogether: A Social Media Application

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Cover image for Clevernote: Smart, Streamlined Note-Taking for Organized Minds

Clevernote: Smart, Streamlined Note-Taking for Organized Minds

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3

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Fullstack Engineer(3)

Marketing Operations + Web Developer

1x: Hired

1: Followers

Marketing Operations + Web Developer

Cover image for What would you improve about social media? I'm starting to b...

What would you improve about social media? I'm starting to build a site based on the Interpals model, with a higher focus on privacy and security. My biggest peeve with that site is that most people who have joined in the last five years don't even understand its purpose. The number of bad actors and disengaged members has become absurd. A site birthed by the idea of international pen pals using the internet has become FILLED with people who want private language tutoring for free, a marriage visa to go to another country, or just plain troll (or send "Hi," and then disappear). I'm trying to plan ways for my new site to cultivate a culture towards genuine connection and interaction, along with putting a lot more roadblocks up for bots and the like (using MFA with auth, rate limiting my APIs, etc.). What might you plan?

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Cover image for I threw it in my portfolio, but now realizing I can share mo...

I threw it in my portfolio, but now realizing I can share more here, thought I'd mention I built a data normalization tool that works directly with your HubSpot account. With a couple clicks, it helps normalize common data fields to save you hours of manual work.

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Cover image for Optimizing HubSpot for Global Staffing

Optimizing HubSpot for Global Staffing

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Cover image for Data normalization SaaS for HubSpot

Data normalization SaaS for HubSpot

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Fullstack Engineer(1)

Expert frontend web developer with 20 years of experience.

Expert frontend web developer with 20 years of experience.

Cover image for Collaborative web based Code editor

Collaborative web based Code editor

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Cover image for iOS Game: Matchy-match

iOS Game: Matchy-match

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Cover image for Project Search - Mac Desktop App

Project Search - Mac Desktop App

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9

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Fullstack Engineer(1)

Tech-Agnostic MVP Creator

Tech-Agnostic MVP Creator

Cover image for Essential Startup Bytes

Essential Startup Bytes

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2

Cover image for Fakey - Media Literacy App

Fakey - Media Literacy App

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Cover image for Leadership Analytics/AI - for ghSMART

Leadership Analytics/AI - for ghSMART

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4

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Fullstack Engineer(2)

Oyediran Olumide

Creating intuitive & user-friendly interface

Creating intuitive & user-friendly interface

Cover image for InterVault Digital Banking Platform Development

InterVault Digital Banking Platform Development

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Cover image for Cartplex E-Commerce Website Development

Cartplex E-Commerce Website Development

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Cover image for Dynamic Cleaning Expert – Cleaning Services Website

Dynamic Cleaning Expert – Cleaning Services Website

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Fullstack Engineer(1)