Anthony Costanzo

Senior Staff Engineer

mail@acostanzo.com • acoz.dev • Matawan, New Jersey

I've spent over fifteen years honing my skills as a software engineer. I'm driven by building products to solve problems that matter, with people who care. Over the course of my career, I've grown from an individual contributor to a Staff+ technical lead, driving critical architectural decisions, scaling engineering teams, and building cultures where technical excellence thrives. I'm an advocate for modern development practices, including AI-assisted workflows. In my experience, the most successful teams form when talented people work on meaningful problems while fostering cultures of continuous learning and mutual respect.

Experience

Senior Software Engineer

August

2025-09 - Present

Contributing to senior living software platform with Scala/Play Framework backend and React/TypeScript frontend.

  • Ramped up on unfamiliar language, framework (Scala/Play), and domain while course-correcting at-risk project back on track
  • Partnered with leadership to decompose complex initiative into valuable phased deliverables, significantly reducing scope and technical complexity
  • Delivered first two milestones to production in net-negative 3000 lines of code through strategic simplification
  • Assigned project ownership by Director of Engineering based on decomposition strategy and delivery results

Senior Staff Engineer

Buoy Software

2019-11 - 2025-09

First engineering hire outside founding team at healthcare technology startup building blood plasma donation software. Scaled from 4-person startup to 80-person organization, progressing from Senior Engineer to Staff to Senior Staff.

  • Built and scaled React Native mobile application using Expo platform from initial launch to 30,000+ monthly active users
  • Designed and implemented comprehensive multi-platform plasma donation ecosystem including donor management system, FDA-cleared Software as a Medical Device, and payment infrastructure
  • Developed GraphQL APIs powering multi-platform architecture (web, mobile, internal tools)
  • Implemented event-driven architecture using RabbitMQ for platform-wide integrations
  • Built custom Rails engines for modular architecture enabling independent deployment cycles
  • Led technical architecture and engineering culture
  • Mentored team members through diverse career progressions as company scaled from 4 to 80 people

Senior Software Engineer

Catch&Release

2019-02 - 2019-11

Full-stack development for creative content platform using Ruby on Rails and React.

  • Built and maintained branded design system
  • Implemented Redux-based state management
  • Collaborated on platform enhancements

Lead Frontend Engineer / Engineering Manager

Interfolio

2014-08 - 2019-02

Led frontend engineering team for academic workflow platform. Drove adoption of modern frontend frameworks and established architectural patterns.

  • Led frontend engineering team and drove adoption of AngularJS framework
  • Established architectural patterns and mentored fellow engineers
  • Balanced hands-on development with team leadership responsibilities

Engineer

Percolate Inc.

2013-01 - 2014-08

Content marketing platform development with Backbone.js and Node.js

Lead Frontend Engineer

Canvas United

2012-01 - 2013-01

Led frontend development for digital agency, building Ember.js applications

Open Standards Developer

R/GA

2011-01 - 2012-01

Web standards and responsive design for digital campaigns

Developer

Magnani Caruso Dutton

2010-01 - 2011-01

Frontend development, client projects, web fundamentals

Skills

Languages

  • Ruby
  • TypeScript
  • JavaScript
  • Scala
  • SQL
  • HTML/CSS

Frontend

  • React
  • React Native
  • Expo
  • Apollo Client
  • Styled Components
  • Tailwind CSS
  • Vite
  • Gatsby

Backend

  • Ruby on Rails
  • REST
  • GraphQL
  • Sidekiq
  • Puma
  • PostgreSQL
  • Redis
  • RabbitMQ

Mobile

  • React Native
  • Expo
  • iOS/Android deployment

DevOps

  • Docker
  • Heroku
  • AWS
  • Datadog
  • Sentry
  • CI/CD pipelines

Testing

  • RSpec
  • Jest
  • Playwright
  • Capybara
  • Testing Library

Integrations

  • Auth0
  • Twilio
  • SendGrid
  • Marqeta
  • Braze
  • Segment
  • AppsFlyer
  • Snowflake

Specializations

  • Healthcare technology (FDA-cleared SaMD)
  • Financial systems
  • AI-assisted development workflows
  • Staff+ technical leadership

Education

New York Institute of Technology

Bachelor of Science in Computer Science

Graduated 2010-05

Projects

Multi-Platform Plasma Donation Ecosystem

Comprehensive healthcare technology platform including donor management system (Ruby on Rails + React/TypeScript), donor mobile application (React Native/Expo, 30k+ MAU), FDA-cleared Software as a Medical Device, payment infrastructure, customer support system (Twilio Flex), and donor journey analytics

  • healthcare
  • react-native
  • ruby-on-rails
  • graphql
  • fda-cleared-samd
  • mobile