MACA
ENGINEERING
LEADER
WHO STILL
SHIPS.
Twenty years of production software. Currently shipping four products solo through Xaymaca LLC — native iOS & Android apps, a 3D Atlanta mapping platform, and the B2B property-data API behind it.— Open to Engineering Manager, Technical Director, Staff / Principal IC, and Fractional CTO conversations.
Resume (PDF)in the Last 90 Days
on iOS + Android
2026
A dated section so you know the site is alive.
Just shipped Ticklr's “warm redesign” v2 — a complete cross-platform UI overhaul on native iOS and Android, localized into 21 languages, with the design system pushed to a shared submodule both apps consume. One development cycle, against a comprehensive test suite, with explicit human-review backlogs for the LLM-translated locales.
In parallel, I replaced a commercial third-party property-data backend for Beltline Living with my own REST API (Project Minerva), migrated production traffic behind a 7-day parallel-run safety net, and brought the corridor work under Proxiva, my location-based property-intelligence platform — architected so data backends can be swapped at deploy time.
Looking for: engineering leadership conversations. EM / Technical Director / Staff / Principal IC / Fractional CTO. I respond personally.
FIVE PRODUCTS.
ONE OPERATOR.
Shipped solo in the last 90 days. Native mobile, web, GIS, open source, and the API behind it.
Ticklr
A relationship-tickling app I built and shipped on the App Store and Google Play. Native iOS (SwiftUI) and native Android (Jetpack Compose), localized into 21 languages including RTL (Arabic, Hebrew) and non-Latin scripts (Hindi, Japanese, Korean, Chinese). On-device only — no analytics, no account, no server. The kind of privacy posture I treat as an engineering invariant, not a marketing line.
Proxiva
My platform brand for location-based corridor intelligence — the infrastructure that turns public parcel and assessment data into a map-first product for a real-estate corridor. Beltline Living is the first corridor built on it, with the foundation designed so additional corridors stand up on the same stack and the data backend can be swapped at deploy time.
Beltline Living
The first corridor on Proxiva — a 3D map of the Atlanta Beltline corridor with property popups for valuation, owner-occupancy, exemption status, structure details, and sales history. Live waitlist behind Google OAuth gating with whitelist enforcement, mobile-performance-budgeted from day one. The consumer surface that proves the platform on a real corridor.
Project Minerva
A standalone B2B property-data API, multi-tenant from day one — Beltline Living is its first customer, not a special case. Migrated production traffic from a commercial third-party data provider to my own API behind a 7-day parallel-run safety net, with providers swappable at deploy time. Ingested Fulton County 2025 assessment data via a sequenced 11-step plan.
GlucoBridge
An open-source iOS app that bridges FreeStyle Libre 3 Plus CGM readings into Apple Health — pulling from the LibreLinkUp cloud API and writing into HealthKit so my glucose data lives alongside the rest of my health metrics. Swift 6 and SwiftUI, with background refresh (BGAppRefreshTask), Keychain-stored credentials, and structured os_log logging. Built in public and AI-augmented, it scratches a real diabetes-management itch the official apps leave open. Unofficial, not affiliated with Abbott, not a medical device — a personal tool I shipped because I needed it.
RANGE,
JUDGMENT,
AND THE WILLINGNESS
TO MAKE THE CALL.
I'm most interested in roles where range, judgment, and the willingness to make the call are valued together — Engineering Manager, Technical Director, Staff or Principal IC, or fractional CTO engagements at early-stage companies that need senior operational thinking now rather than later.
Twenty years of production engineering have taught me which corners can't be cut, which patterns scale, and how to keep an engineering organization legible to itself. Now amplified by AI tooling I've calibrated to ship faster without shipping junk. Three things show up in everything I do.
I ship.
Not demos. Not prototypes. Things in production, on a real store, in front of real users. Twenty years in, I still believe the only measurement that matters is whether a stranger can use the thing.
AI-native, calibrated.
Claude is in my workflow every day. Tests are in my workflow every day. Decision documents are in my workflow every day. I shipped 17 LLM-translated locales — and the same day, filed the human-review issue. The art is knowing which one of those steps to skip is malpractice.
The operational layer is engineering.
Linear isn't where I track tickets after I forget about them. It's where I decompose problems before I have permission to code them, document the decisions I'd otherwise have to defend three months later, and make my own thinking legible to a teammate who isn't in the room yet. The most underrated leadership skill in our industry.
WHERE I'VE
SHIPPED
Shipping four products solo through my software practice: Ticklr (privacy-first contact app on iOS + Android, 21 locales), Beltline Living (3D Atlanta property-intelligence map on Next.js + Mapbox), Project Minerva (B2B property-data REST API, migrated to production via a parallel-run cutover), and Proxiva (location-based corridor-intelligence platform).
Senior backend engineer at Backbase, the AI-Native Banking OS. Focused on production reliability, observability (Datadog & Grafana), and incident response — and integrating AI tooling (GitHub Copilot, Gemini) to accelerate SQL development, RCAs, and technical documentation.
Built Microsoft Defender for Threat Intelligence. Led sovereign cloud integrations, AI/ML streaming pipelines, and SIEM deployments across Azure China and US Gov clouds.
Helped traditional banks compete with fintech. Microservices with Java + Spring Boot on Azure and AWS. Third-party financial API integrations.
Engineered clustered ActiveMQ systems for enterprise-critical transaction messaging. Automated with Puppet & Splunk Cloud.
Built out the entire Java dev team at Sharecare from the ground up. Architected Forbes Travel Guide's luxury platform. Saved $72K/yr via CMS optimization.
12+ years co-organizing the largest Java conference in the US. Monthly meetups, global speakers, thousands of developers. Community is in the DNA of everything I build.