DanielFullerton.

Work

Selected work

Figures generalized - no customer names or internal identifiers.

1. 01

   Near-real-time charge reconciliation

   Owner · Commerce billing platform

   I own the reconciliation layer for a commerce platform that processes billions of billing events a month across nine processing units and multiple Azure regions. I built automated dropped-event detection and replay, and hardened the alignment and comparison logic that keeps open and closed orders in agreement.

   ~10k dropped events/mo → 0100% reconciliation accuracybillions of events / month
2. 02

   Legacy pipeline shutdown & streaming cutover

   Multi-quarter program

   Led the cutover of hundreds of thousands of billing groups off a legacy consumption pipeline onto a new streaming-sourced path - standing up processing and reconciliation infrastructure across regions and running auditable, financially-tiered batch cutovers with disciplined rollback when discrepancies appeared.

   100s of thousands of billing groups100% accuracy at closezero SLA breaches
3. 03

   Livesite, reliability & cost

   On-call DRI · platform operations

   As the on-call directly-responsible engineer, I'm the person the pager wakes. I run calm, telemetry-driven root-cause analysis on production incidents, hold the line through the highest-stakes week of every month at close, and mentor teammates through their first on-call rotations. Alongside that I cut recurring cloud spend, reduced CI build time, and shaved reconciliation runtime so month-close validation lands hours earlier for every partner team.

   telemetry-driven RCA~78% faster CI builds~$35K/yr cloud cost removed
4. 04

   SOX ownership, security & compliance

   Owner · SOX / Security

   I own four SOX controls end-to-end for the platform - compiling the annual audit-evidence packages, leading auditor and tester walkthroughs to minimal follow-ups, and authoring a reusable, AI-assisted evidence workflow that makes the process repeatable year over year. On the security side, I brought ~95 cloud resources into network-security-perimeter compliance across public and sovereign clouds and delivered managed-identity auth uplifts across every production region.

   4 SOX controls owned95 resources → compliant10 production regions

Projects

Built end to end

Designed, built, deployed, and run by me.

1. 01

   Lean Site Services

   Freelance · Design, build, hosting & launch

   

   I rebuilt a construction-services company's website end to end and launched it on their domain. The old WordPress site on shared hosting became a static Next.js site on Azure Static Web Apps, with quote and contact forms delivered by a serverless function and a Pay Your Bill checkout through Authorize.Net that takes live card payments. I ran the DNS cutover through Cloudflare with a tested rollback path, and every push runs the unit tests before deploying to production, dev, or a per-PR preview.

   live card payments$0/mo hosting141 unit + 16 end-to-end tests

   Next.js · TypeScript · Tailwind CSS · Azure Static Web Apps · Azure Functions · Cloudflare · Resend · Authorize.Net · Vitest · Playwright

   Visit leansiteservices.com↗

Stack

What I
work with