About Me
I'm a full-stack software engineer running an independent consultancy, with 4+ years of production experience across AI/LLM platforms, fintech, hospitality, and consumer streaming. I help teams ship multi-tenant SaaS, modern auth and billing systems, and end-to-end products on Rails 8 and SvelteKit.
My Journey
My journey began with a Bachelor of Music in double bass performance from the University of Colorado Boulder. Curiosity about how the software powering modern life actually works led me through the full-stack engineering bootcamp at Flatiron School — a background that still shapes how I approach product work today.
Since 2024 I've run my own consultancy, Zachary Flynn Engineering LLC, taking on concurrent engagements across AI/LLM platforms (Soligo.ai), hospitality (100x Hospitality), consumer delivery (Vyblee), and agency work at CodePilot — shipping apps like IndyX, Nylo, Donor Red, and Westhill Financial.
What drives me is the intersection of product thinking and solid engineering — building Stripe billing that actually reconciles, auth that scales across tenants, and interfaces that feel obvious. Equally happy owning a feature solo for a startup or plugging into a senior engineering team.
Skills & Technologies
Experience
Founder & Principal Engineer
Zachary Flynn Engineering LLC
Independent software consultancy delivering full-stack engineering across multiple concurrent client engagements — 100x Hospitality, Soligo.ai, Vyblee, and CodePilot. Focused on multi-tenant SaaS billing, modern auth systems, and end-to-end product delivery on Rails 8 and SvelteKit.
Full Stack Engineer (Contract)
100x Hospitality
Boutique live music event production company specializing in destination events and VIP travel. Built admin and customer-facing dashboards for event operations, replaced legacy auth with BetterAuth, and shipped an embedded vacation package wizard converting browse traffic into multi-night booking inquiries.
Full Stack Engineer (Contract)
Soligo.ai
Multi-tenant B2B SaaS for training professionals to build and monetize branded AI coaching assistants. Built end-to-end Stripe integration powering subscriptions, voucher codes, and creator payouts. Owned Supabase auth architecture with row-level security, and shipped creator dashboards plus the transactional email system. Company has since closed.
Frontend Engineer (Contract)
Vyblee
Returned for a focused engagement supporting Vyblee's pivot to hotel-branded on-demand food delivery. Rebuilt the customer-facing frontend in SvelteKit + Tailwind, stood up CI/CD and ephemeral test environments on Vercel + GitHub Actions, and built a Looker Studio reporting dashboard. Contributed to a 23% revenue lift over the engagement.
Full Stack Engineer (Agency)
CodePilot
Software agency engagement shipping production applications across fintech, consumer PWAs, and civic-tech — IndyX (algorithmic Bitcoin trading on SvelteKit), Nylo (children’s storytime PWA on Rails 8), Donor Red (blood donation coordination on Rails 8), and Westhill Financial (digital banking). Standardized CI/CD, PWA capabilities, and payment/auth integrations.
Senior Frontend Software Engineer
Seel
Generative AI risk-assessment platform for venture capital firms. Led a 3-engineer frontend team, built a multipart pitch-deck uploader (FilePond) feeding LLM-based due diligence pipelines, implemented AWS Cognito auth with SSR, and integrated typed GraphQL schemas. Led investor-facing UI design in Figma.
Frontend Software Engineer
Vyblee
Customizable food delivery storefront generator. Built a Stripe-powered cart and checkout flow, delivered a no-code storefront generator letting operators launch a branded delivery brand in minutes, and designed SvelteKit authentication and onboarding flows contributing to a 25% increase in user adoption.
Full Stack Software Engineer
Lively
Multimedia streaming platform and music NFT marketplace. Delivered custom storefronts for bands to release albums and live recordings as music NFTs, built a digital live-streaming venue serving 200+ artists, integrated Web3 frontend tools (wallet login, NFT redemption), and developed a custom audio player with advanced playback controls.