Mackenzie Hatcher

Full-Stack Engineer (TypeScript, .NET, React, Next.js) — Backend, frontend, databases (SQL Server), reliable LLM systems

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Featured Projects

SupportDesk (Realtime Support + Widget)

Socket.IO support inbox with assignment, tickets, analytics, and an embeddable widget (script + iframe)

RealtimeNestJSSocket.IORedisEmbeddable WidgetPostgresPlaywright

ETL Studio

CSV → validated datasets with background jobs, SSE progress, retries/DLQ, and S3-backed uploads

ETLFastAPICelerySSES3/MinIOReliabilityMulti-tenantObservability

Pulse (Mobile Habit + Mood Tracker)

Offline-first mobile app with SQLite outbox sync, OAuth, push reminders, deep links, and share cards

MobileExpoOffline-firstSQLiteSyncOAuthPushDetox

What I optimize for

Reliability via validation and invariants — schema checks and eval harnesses catch failures before production
Observability — traces and audit artifacts for debugging, compliance, and incident response
Simple systems that ship — minimal dependencies, clear boundaries, and iteratively deliverable increments

Skills

Backend

TypeScript, Node.js, .NET, Fastify, REST APIs, schema validation (Zod)

Frontend

React, Next.js, TypeScript, responsive UI, minimal web UIs

Databases

SQL Server, Postgres, Redis, Prisma, Drizzle

LLM Systems

Structured extraction, deterministic rendering, eval harnesses, repair passes, trace/audit artifacts

Tooling

ESLint, TypeScript, Git, CI/CD, minimal web UIs

Experience

Full-stack Developer with experience building enterprise systems, LLM pipelines, and reliable backend services. Backend (TypeScript, .NET, Fastify), frontend (React, Next.js), and databases (SQL Server, Postgres, Redis). Focus on schema validation, audit trails, and production-ready APIs.