Software Engineer

Zoriah Cocio

Full-stack and systems engineer with production experience across TypeScript/React web applications, Go and Python services, APIs, applied AI, and real-time systems.

Client engagements

50+

Production web applications across B2B SaaS, fintech, and AI tooling

Systems work

Go/C++17

Control planes, storage engines, realtime data, and API boundaries

Quality gates

CI/CD

Automated testing, deterministic modes, eval fixtures, and documentation

Positioning

Engineering Profile

I build and maintain production web applications, backend services, API integrations, applied AI workflows, and real-time interfaces. My work spans TypeScript/React frontends, Go and Python services, CI/CD, observability, and documentation.

I also use modern AI coding assistants to accelerate implementation while reviewing, testing, debugging, and taking ownership of generated code before it is integrated.

Software EngineerFull-Stack EngineerFrontend EngineerSystems EngineerProduct Engineer

Selected projects

Resume Project Evidence

Cardinal — Sharded Time-Series Database

C++17 + Go

Built a Go control plane exposing an HTTP/JSON API with backpressure, a cardinality guard, Prometheus self-metrics, and a C++ storage engine with Gorilla compression and a crash-safe write-ahead log.

Systems and backend engineering

C++17GoHTTP/JSONPrometheusWAL

RevAssist — Applied AI Workflow

Next.js + AI SDK + Zod + PostgreSQL

Built a production AI workflow with structured outputs validated server-side before persistence, deterministic CI behavior, regression/eval fixtures, failure handling, and audit/history layers.

Full-stack AI product engineering

Next.jsAI SDKZodPostgreSQLCI

Ledgerline — Real-Time Trading UI

React + TypeScript + WebSocket

Built a low-latency interface for sustained live market-data streams using workers and buffered queues while preserving responsive rendering.

Frontend and realtime systems engineering

ReactTypeScriptWebSocketWorkersBuffered queues

Case studies

Portfolio Case Studies

Cardinal

Sharded time-series database

Shows backend and systems depth beyond frontend polish: binary protocols, crash recovery, shared-memory ingest, consistency tradeoffs, observability, and test discipline across two runtimes.

Systems & backend engineering

C++17GoHTTP/JSONUnix socketsPrometheus

SpendBoard

Finance dashboard

Shows product-grade frontend architecture for high-volume data UI: predictable state, table ergonomics, performance budgets, and calm scanning under pressure.

Design & build

ReactTypeScriptViteTanStack TableTanStack Virtual

FrontGuard

Frontend security playground

Shows secure frontend thinking, scoped ingestion, Redis-backed telemetry, dashboard UX, and the ability to turn education into a real product workflow.

Design & build

Next.jsTypeScriptRedisRoute HandlersRBAC

Ledgerline

Realtime trading interface

Shows realtime product engineering: workers, buffered queues, coalesced renders, calm motion, and instrumentation that explains whether the chart can be trusted.

Design & build

ReactTypeScriptWebSocketWorkerBuffered queue

dealbrief

Agentic LLM pipeline

Shows agentic AI design: structured handoffs between specialized models, embeddings as a tool rather than a feature, streaming UX as a first-class concern, and a clear distinction between when an LLM is the right answer and when it isn't.

Design & build

Next.jsTypeScriptAnthropic ClaudeVoyage AIZod

RevAssist

AI workflow product

Shows applied AI product thinking: schema-first output, server-side risk boundaries, independently editable surfaces, persistence, and eval-minded architecture.

Design & build

Next.jsTypeScriptAI SDKZodPostgres

Impact

Selected Engineering Evidence

Delivered production web applications for 50+ client engagements across B2B SaaS, fintech, and AI tooling, owning scope, architecture, implementation, testing, and delivery.
Built TypeScript/React frontends and backend services in Go, Node.js, and Python, including REST, WebSocket, and SSE integrations.
Built a Go control plane for Cardinal with an HTTP/JSON API, backpressure, a cardinality guard, Prometheus self-metrics, and a C++ storage engine.
Built AI-powered workflows with server-side schema validation, deterministic mock modes for CI, eval fixtures, persistence, and audit/history layers.
Produced technical documentation, architecture notes, setup/deployment instructions, and handoff materials for maintainable production systems.

Skills

Technical Strengths

Frontend

React / Next.js / TypeScript / Tailwind CSS / Zustand / TanStack Query

Backend and APIs

Go / Node.js / Python / REST / HTTP/JSON / WebSocket / SSE / PostgreSQL / Zod

Cloud and DevOps

AWS / Docker / GitHub Actions / CI/CD / Vercel / Supabase / Prometheus

Testing

Go race detector / Property/fuzz testing / Deterministic CI modes / Eval fixtures / Regression testing

Systems and AI

C++17 / Shared-memory IPC / Write-ahead logging / Quorum replication / OpenAI APIs / Anthropic APIs / Structured outputs

Source of truth

Experience and Education

Jan 2019 – Present / Experience

Independent Full-Stack Engineer — Zoriah Cocio

Remote / Tucson, AZ. Delivered production web applications for 50+ client engagements across B2B SaaS, fintech, and AI tooling, owning scope, architecture, implementation, testing, and delivery.

Jun 2018 – Dec 2021 / Experience

Full-Stack Engineer — APRE Instruments

Remote / Tucson, AZ. Built and integrated web and backend systems, custom CMS functionality, e-commerce flows, third-party APIs, payment integrations, deployment documentation, and stakeholder-facing features.

April 3, 2025 / Education

Stanford University — B.S. Computer Science, 2025

Bachelor of Science in Computer Science. Degree conferred April 3, 2025. Computer Science — School of Science.

Keywords

Core Technologies and Workflows

GoTypeScriptJavaScriptPythonC++17ReactNext.jsTailwind CSSZustandTanStack QueryPostgreSQLREST APIsWebSocketServer-Sent EventsAWSDockerGitHub ActionsCI/CDPrometheusProperty/fuzz testingDeterministic CI modesOpenAI and Anthropic APIsStructured outputs