Tooling
What I've built with
An inventory of the systems, services, and disciplines I've designed, integrated, or run in production — across my own products, client engagements, and twenty-two years of enterprise data work.
AI & LLM integration
Anthropic Claude API (server-side SDK)Multi-model routing by taskCost/quality model tieringVision & image analysis pipelinesEphemeral prompt cachingDomain system-prompt librariesStructured JSON output contractsMalformed-response retry logicMulti-turn conversational stateContent-guard pre-screeningNSFW & off-domain rejectionPer-feature AI cost attributionToken usage loggingTemperature & max-token tuningAI-assisted matching engines
Payments, billing & payouts
Stripe Checkout subscriptionsStripe webhooksStripe Connect (Express onboarding)Outbound transfers & disbursementIdempotent payout runsRevenueCat subscription infrastructureUnified multi-app webhook routingEntitlement lifecycle modelingFree-tier quota enforcementTeam & seat-based billingPay-upfront booking flowsRevenue-share payout enginesCompletion-weighted revenue poolsLargest-remainder split mathRecoupable advances with capsInteger-cent money handlingPrice-drift guards against StripeMerchant-of-record modelingMoney-transmission posture & ADRAppend-only obligations ledgersPayout redistribution logicApplication-fee revenue splits
Realtime, audio & mobile
WebRTC peer connectionsWeb Audio APITone.jsBrowser-based DAWMultitrack recording & mixingAudio effects processingReal-time multi-user collaborationiOS & Android app deliveryPush notificationsGPS / geolocation discoveryIn-app messagingShared calendarsProgressive web appsOffline-first mobile capture
Data architecture
PostgreSQLDb2 (LUW)OracleMicrosoft SQL ServerTeradataSupabase PostgresRow-level security policiesSchema-per-tenant multi-tenancyTenant-context middleware injectionTenant isolation designSequential migration managementDatabase triggersWrite-once immutable recordsState-transition guards in SQLServer-authoritative event streamsPer-type dedupe indexingRetention pruningCascade deletionConnection poolingOLTP & OLAP designETL pipelinesData warehousing (Inmon & Kimball)Star & snowflake schemasQuery tuning & explain plansIndex & memory managementHigh availability & clusteringHADR & log shippingBackup, recovery & DR
Authentication & access control
Supabase AuthEmail/password & magic linkGoogle OAuthJWT verification middlewareServer-side session verificationCookie-based SSR sessionsRole-based access controlPer-action authorizationAdmin allowlist gatingService-role key isolationPrivilege-escalation remediationscrypt PIN hashingHMAC unlock cookiesRoute-level middleware gatesGuest & low-friction access tiersNo-public-signup provisioning
Compliance, privacy & safety
COPPA-compliant data modelingVerifiable parental consentConsent versioning & revocationPIN-gated parent controlsData export on requestAccount deletion cascadesFirst-party-only CSPNo-tracker guard testsProfanity filtering & moderationContent takedown workflowsAdmin review queuesExecutable compliance controlsCIS benchmark crosswalksFDA, HIPAA & SOX environmentsBanking audit & regulatory supportTokenized PII vault designStorage isolation hardeningTOCTOU race remediationE-signature & contract locking
Frontend engineering
Next.js App RouterReact 18 & 19TypeScript (strict)Vite SPA buildsReact RouterTailwind v4CSS-variable design tokensMulti-brand theming systemsReact Flow node graph editorsService worker shell cachingClient-side image compressionNative camera capture inputsResponsive layout systemsReduced-motion supportKeyboard & focus accessibilityLoading, empty & error states
Offline & resilience
IndexedDB offline queuesQueue-and-replay on reconnectOptimistic queued-state UINetwork-failure fallbacksDuplicate-submission toleranceDeferred completion notifications
Backend & infrastructure
Express.js on NodeServerless function deploymentVercel hosting & edge configNext.js Server ActionsMultipart upload handlingObject storage bucketsSigned-URL deliveryEntitlement-gated asset servingRate limitingHoneypot spam protectionTransactional email (Resend)SMS & multi-channel fan-outBatch & scheduled jobsEnvironment & secret separationMulti-repo architectureGit submodulesWindows Server, Linux & AIXPowerShell & shell scripting
Testing, CI & quality
Vitest unit testingpgTAP database testingGitHub Actions CISeparate database CI jobsZod schema validationInvariant testsBuild-failing vocabulary guardsArchitecture decision recordsStop-and-verify delivery checkpointsAcceptance-criteria specsObservability & error tracking design
Product engines & domain systems
Ink narrative scriptingCompiled story runtimesStructured-to-Ink compilersPortable dependency-free runtimesSingle-source validatorsBundle import/export with dry-runCondition-aware rule checkingCustom rich-text tokenizersDeclarative unlock rule enginesAchievement & collection systemsProgress aggregationSpaced-repetition schedulingExam & practice-test enginesReadiness scoringCertification content pipelinesJurisdiction-specific content at scaleMatching & recommendation logicMarketplace listing & application flowsNegotiation enginesRatings & reputation systemsBooking & confirmation workflowsVoting & contribution mechanicsGroup & band formationAvailability-based scheduling & assignmentDocument generation from templatesAdmin dashboards & aggregationCSV export
Systems architecture & specification
Multi-tenant SaaS architecture100+ tenant isolation designSubdomain tenant resolutionShared-DB vs per-tenant analysisBuild-vs-buy evaluationVendor selection & scoringPhased build planningCost & effort modelingModule decompositionOpenAPI specification & versioningRate limits, quotas & edge cachingPayments regulatory analysisData model specificationInfrastructure requirements docsVideo streaming architectureCMS & headless commerce evaluationClient technical vetting
Growth, SEO & analytics
Puppeteer build-time prerenderingHeadless Chromium in CIStatic route generationLead capture & funnelsEmail capture with dedupeConversion-oriented landing pagesSocial post automationUsage & cost dashboardsMarketplace health metrics
Game & 3D
Unreal Engine 5 (C++)UCLASS/UPROPERTY class designWorld PartitionLandscape stamp workflowsBiome & path toolingMultiplayer systems designVisual Studio 2022
Commercial & advisory
Financial modelingMulti-scenario revenue models10-year enterprise projectionsCap table modelingMarket selection scoringSeller & deal diligence reviewEntity structuringInvestor & partner decksTerm-sheet draftingOnboarding funnel designPricing & tier designUnit economics analysis
Leadership & delivery
Executive IT strategy & budgetingVendor & consultant managementChange advisory boardsGovernance & SOP authoringTeam leadership up to 18Mentoring & standards settingRequirements gatheringPhased scoping with explicit non-goalsClient handoff documentationITIL v3Lean Six Sigma (Green Belt)
248 capabilities, and the list keeps growing. If what you need isn't here, ask — the answer is usually that I've done something adjacent.