Sports learning platform
React/canvas product architecture
"Zack took detailed plain-English specs and translated them into a functioning product architecture that is genuinely ambitious in scope."
5.0 Upwork review
I build useful systems
I turn complex workflows into production-ready software.
Product engineer with a bias for shipping. I design, build, and automate the systems behind SaaS products, dashboards, AI workflows, and internal tools that save time and drive growth.
Builder. Problem solver.
// ship -> learn -> iterate -> scale
Top Rated Plus
Upwork
100%
Job Success
$50K+
Earned on Upwork
GitHub
DeliriumPulse
2017-Present
Building & Shipping
Client proof
What clients actually say
Exact short excerpts from public Upwork review screenshots, trimmed for space without rewriting the client's words.
Healthcare MVP
Clinical documentation workflow
"He is highly responsive, thoughtful, and demonstrates strong technical and product awareness."
5.0 Upwork review
AI search engineering
Listing data, filters, Pinecone
"He quickly assessed the existing AI architecture, untangled model and pipeline issues, and rebuilt core components with a clear, production-first mindset."
5.0 Upwork review
Gym management PWA
React/Firebase product build
"Zack is a rare find who treats the project as his own. If you need a high-level developer to take full ownership and deliver fast, hire him immediately."
5.0 Upwork review
Senior API integrator
SaaS MVP and integrations
"Zack has always been responsive, understanding, and willing to work through everything with me."
5.0 Upwork review
Construction reporting
AI-powered operations platform
"Zack moves fast without compromising technical skill. He made it a priority to understand our vision, then over delivered on the execution."
5.0 Upwork review
Selected work
Case studies
These summaries stay public-safe: no private repos, client dashboards, user data, or contract details.
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AI product rescue
Search, filters, and vector workflows
Rebuilt core AI-search pieces after an earlier team missed the mark, with clearer data structure, Pinecone search, and measurable delivery loops.
PineconeLLM workflowsData mappingProduction rebuild
Workflow systems
Complex product architecture
Turned plain-English specs into working product architecture across dashboards, role-based workflows, canvas-style UI, and operational tools.
ReactNext.jsFirebaseSupabase
Operations tools
Dashboards, reporting, and automation
Built practical interfaces for small teams that need the system to save time, expose the right signal, and survive real client use.
DashboardsAutomationStripeAPIs
Open source and private builds
Public repos show range. Private builds show product depth.
The strongest recent work is a mix of public repos, private client contracts, and private product builds. Public links are shown where appropriate; client-sensitive details stay redacted.
Past independent product
VETTR
Solo-built crypto signal and wallet tooling with Telegram delivery, gated access, payment/wallet checks, and outage-aware verification. It is not a live offer; it is here as proof I can build and operate a real system end to end.
PythonasyncioFastAPITelegramSolana APIs
Private SaaS build
A2P Desk
Agency preflight workspace for A2P readiness, evidence capture, public reports, review workflows, and production hardening.
Next.jsSupabasePlaywrightTwilio
Private product build
Lancer
AI-assisted scope and payment protection desk for freelancers, built around invoices, milestones, risk signals, and practical project handoff.
Next.jsAI workflowsPaymentsPostgres
Stack and fit
Broad enough to own the workflow. Practical enough to ship.
Product surfaces
ReactNext.jsTypeScriptTailwindCanvasPWAs
Backend and data
PythonFastAPINode.jsPostgreSQLSupabaseFirebase
AI and automation
OpenAIGeminiVector searchPineconen8nLangChain
Integrations
StripeTelegramWebSocketsTwilioSolana APIsVercel
Services
Focused milestone work, or a serious full-time role.
Milestone-based work keeps scope honest: one visible result, one clean handoff, then the next decision.
Production rescue
$750-$2.5K milestone
Diagnosis and stabilization for broken workflows, deploy issues, data problems, and unclear handoffs.
Feature module
$1.5K-$5K milestone
Contained product work across UI, backend, data, third-party APIs, and handoff notes.
MVP build sprint
$5K-$15K milestone
A usable first product slice with auth, data, deploys, and practical scope control.
W2 or contract
Role-dependent
Open to remote, relocation, contract-to-hire, or full-time roles where independent execution matters.
Contact
Available for broken workflows, half-built apps, and roles that need a practical builder.
Best fit: founders, small teams, AI workflow products, and companies that value independent research, ownership, and direct communication.