Telehealth client delivery
Patient intake, scheduling, payment collection, and transactional email delivered around existing practice software. The engagement was delivered through AIntellect, a part-time solutions practice I co-founded.

Customer-facing software engineer with nine years in production software. I own SQL, API and integration investigations through production validation. At Vestmark, I measured a file-delivery bottleneck and coordinated improvement from about five hours to about 45 minutes. I also built and released Vouch and Standsong on iPhone and Android.
Customer delivery, released products, and technical systems, with their operating evidence and current limits stated plainly.
Patient intake, scheduling, payment collection, and transactional email delivered around existing practice software. The engagement was delivered through AIntellect, a part-time solutions practice I co-founded.
A live home-improvement marketplace with a Houston roofing-first focus. I co-founded Junta with Davia Hudson, who leads business direction. I lead engineering, and we both work on the launch. Homeowners compare sealed bids on a shared project scope before choosing a contractor. Its payment-race correction prevents a losing request from cancelling a shared payment created by the winning request. It is live on the web, the App Store and Google Play.
A Houston restaurant app for choosing where to eat from recent recommendations. Newer vouches carry more weight, the whole Top 10 is free, and membership never adds voting power. I directed and verified its AI-assisted implementation across Flutter, Firebase, subscriptions and linked sign-in, and released it on iOS and Android.



A football songbook app released on the App Store and Google Play in November 2026. Saved Matchday packs remain available offline. The work includes reviewed supporter Call-Ups, dated-source Terrace Proven evidence, and native media tooling in Swift and Kotlin, tested on iPhone and Pixel. I chose original badges drawn in code for 20 clubs and a lyrics policy that leaves out the distinctive lines of 36 of the 193 starter chants and points to the original song. These are rights-risk decisions; they do not establish legal clearance.
Production operations software deployed at a permitted transitional-housing facility, with authorization enforced beyond the interface and a per-facility retention date defaulting to five years.
A voice-intake demo on a real phone line, for collecting request details, classifying urgency and confirming what the caller said. Replay recordings bind to a hash of the prompt, so changed behavior cannot inherit a stale pass. Booking is simulated; a person handles fulfillment.

A Claude-backed document-assistant demo with access filtering inside retrieval. A local evaluation uses saved public OPM/GSA policy snapshots, BGE embeddings with Qdrant, table-preserving ingestion and simulated HR and finance groups. Tools with external effects are simulated and approval-gated.
In one recorded Claude Sonnet 4.6 run over fixed retrieval context, 13 of 14 answerable questions received supported answers (implementing-agent assessment only). The retrieval miss led to abstention.
The local evaluation contains 20 questions: 14 answerable, four simulated access denials and two asking for facts absent from the snapshots. Eighteen questions received model responses and two were refused locally without model inference. All 18 responses passed structural citation checks. Strict whole-response grounding was 15 of 18 because three correct refusals added advice outside the supplied context. Only the implementing AI agent made those judgments. The original responses and retrieval miss are preserved. The new evaluation is local and does not establish production identity integration, end-to-end service testing or ongoing AI usage.
61 deterministic security and retrieval evaluations ran across eight documented threat classes and retrieval behavior without model calls. The recorded CI matrix covered three supported combinations of Qdrant or pgvector backends with native or LangGraph runtimes. Per-session and per-IP spend caps bound model cost. The demo uses a role switcher and simulated side-effecting tools; real-world effects cannot execute through those simulated tools. A document outside the selected role's access is never a candidate for the answer. In a separate attack test, poisoned content induced a simulated email action addressed to an attacker; the action gate blocked it before execution.
A private football prediction beta, co-developed with independent approval on every merged web pull request. The work includes server-owned prediction boundaries, provider-data integrity, and collaborator-reviewed mobile changes.
Analytics with dependency-aware freshness, a read-only Postgres role scoped to the marts schema, and Prometheus, Grafana, and Loki observability. A read-only Model Context Protocol server exposes bounded queries over the reporting marts. Separate local fault injection showed a failed source stopped dependent work and preserved the last complete dashboard.
Why a passing check is not evidence until you have watched it fail on purpose.
Read the technical note ↗ AI judgment · Privacy · ProductWhy changing the shape of the data produced a stronger guarantee than another model pass.
Read the technical note ↗Over nine years in production software, I have worked across code, data, infrastructure, support, and customer experience. At Vestmark, I measured transfer and database work separately and coordinated improvement of one file delivery from about five hours to about 45 minutes. A separate client workflow reached roughly 10 to 15 minutes. Since July 2025, I have also worked part-time through AIntellect, a solutions practice I co-founded with Ben Bolaji. Across that work and my product builds, I stay accountable for behavior through client constraints, real calls, live operations, collaborative review, and release decisions.
I build with Claude Code and Codex as peer implementers and reviewers. I define requirements, choose checks that can expose the failure, preserve evidence for handoffs and approve releases. Cross-model review caught a credential-exposure defect, while measured experiments help me avoid unnecessary architecture.
HondaSSI SchäferVeracrossVestmark