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Adrian Marcellus

Full Stack Software Engineer

Lima, NY

Summary

Full stack engineer looking for an innovative team using the latest technologies to ship high-quality products fast.

Experience

JPTabb & Co.Jan 2025 – Present
Full Stack Web DeveloperFL
  • Main developer of a multi-tenant business directory and marketplace in Next.js, React and Postgres, where each city gets its own hub of businesses, events, deals, news and products.
  • Built multi-vendor checkout on Stripe Connect that splits one cart into per-vendor charges and payouts, with refunds, returns and cancellations that settle back to the right party.
  • Built dynamic shipping on the three major carrier APIs: live rates at checkout, package building and label purchase.
  • Built the Playwright and Vitest suites that gate every release, recording each user journey in a real browser, and an AI-assisted workflow where agents follow a spec, build and test process I designed.
  • Built the ETL pipeline that fills each new city: Google Maps scraping, geographic filtering, entity resolution, LLM enrichment and SQL seeds.
JPTabb & Co.May 2024 – Sep 2024
Full Stack Web Developer Intern / Co-opFL
  • Main developer of Page Parrot, an embeddable live-chat widget delivered as a single JavaScript URL and themed per account. Written by hand.
  • Integrated the Slack and Discord platforms, so each visitor conversation becomes a thread and the team's replies reach the site in real time.
  • Built the Node.js REST API and Firebase data model on AWS, plus self-serve Stripe subscriptions.
Xerox CorporationMay 2023 – Dec 2023
Software Engineering Intern / Co-opWebster, NY
  • Replaced manual reporting with live Azure Workbooks dashboards backed by KQL queries.
  • Designed and instrumented a C# telemetry event set for print and scan workflows on an enterprise product line, after investigating gaps and presenting options to engineering management.
Skyport-IT Inc.Jan 2021 – Aug 2022
IT TechnicianRochester, NY
  • Network administration, hardware installation and repair, and front-line support for non-technical customers.

Skills

Languages & Runtimes:
TypeScript, JavaScript, Node.js, SQL, C#, Python
Frontend:
React 19, Next.js (App Router), Tailwind CSS, Accessibility (ARIA), Radix UI, TanStack Router / Query, Electron
Backend & Data:
PostgreSQL (Postgres), Supabase (Auth, Storage, RLS), REST APIs, ETL pipelines, Redis, SQLite
AI & Automation:
LLM integration (OpenAI, Anthropic, GLM), Playwright, Entity resolution, Web scraping (Crawlee, Cheerio), Vitest, QA automation, Vision models
Cloud & Infrastructure:
Stripe / Stripe Connect, Vercel (serverless, ISR), Docker, AWS (S3, EKS), Microsoft Azure, Kubernetes, Git

Education

Rochester Institute of TechnologyDec 2024
B.S. Computer Science · GPA 3.46Rochester, NY
Finger Lakes Community CollegeDec 2020
A.S. Computer Science · GPA 3.71Canandaigua, NY