# Liam Duffy > Senior Software Engineer Location: Brooklyn, New York, United States Profile: https://flows.cv/liamduffy ## Work Experience ### Software Engineer @ Seso Inc. Jan 2024 – Present | New York, United States ### Software Engineer @ Prosper Health Jan 2024 – Jan 2024 | New York, United States Led the design and development of an therapy intake and appointment scheduling web app, automating a previously manual intake + scheduling process, resulting in record week-over-week increases in therapy bookings. Led migration of the codebase from silo'd frontend and backend apps to a monorepo using Turborepo, enabling code re-use and improving integration between different parts of the application. Implemented CI/CD and automated releases using Fly.io and Docker. Setup automated testing, coverage reporting, and linting checks on PRs and on staging/production releases. ### Senior Software Engineer @ Flowcode Jan 2021 – Jan 2023 Responsible for development of enterprise product and internal sales tools using Next.js, React, Firebase, and GraphQL on a fifty person engineering team. Lead front-end migration of our authentication provider for three million users from Firebase to Frontegg. Implemented SSO (SAML) and OAuth flows. Lead development of enterprise admin dashboard used by 70% of Fortune 1000 companies, with role-based access control, admin dashboards organization management, and invitation and referral systems ### Software Engineer @ Flowcode Jan 2020 – Jan 2021 | New York, New York, United States ### Full Stack Engineer @ The Juggernaut Jan 2018 – Jan 2021 | Remote Collaborated with founder on nights and weekends to build and scale product from launch over 2 years of user growth Built React (Next.js) based web app to deliver daily long-form journalism on South Asian news, culture, & politics to a global readership. Built backend to support paywall-based subscription model & user account management with Stripe, Firebase, and PostgreSQL. Deployed on Vercel (formerly Zeit) and Heroku. Designed and deployed GraphQL API written in Typescript to deliver publication content and user data to The Juggernaut’s web and mobile apps. Structured the publication’s content model in Contentful, a headless CMS, to support the editorial workflow of the founder and a network of over 100 freelance writers. Integrated with Segment, Google Analytics, Facebook Pixel, and Amplitude to measure user behavior, test product hypotheses, gauge content popularity, and inform product growth. Launched features to drive product growth, including one-click article sharing, a rewards program for new subscriber referrals, and gift subscriptions. ### Full Stack Engineer @ Socialstar Jan 2017 – Jan 2020 | Mumbai Area, India Hired as a member of the founding team to lead product development. Lead developer in an engineering team of three. Built a product to streamline corporate volunteering and employee engagement in Mumbai-based companies (product is live at socialstar.org). Built product using React (Next.js), Firebase, GraphQL API written in Typescript, and PostgreSQL. Main features included content management & rsvp management for volunteering events, employee management dashboard, and employee rewards system. Defined and implemented workflows for the engineering team, including product backlog prioritization, issue tracking, code review, QA, deployments, and database migrations. Taught & pair-programmed with junior developer on the team over the course of two years, helping them grow from zero knowledge of our stack, to full productivity in the codebase. Collaborated daily with business development, sales, and design team members to integrate new insights about customers into product with a rapid daily release cycle. Evolved initial product and data model as value proposition for company changed. Managed transition from B2B employee engagement product, to B2C events management platform, to remote corporate volunteering product (post-COVID) while keeping codebase stable. ### Co-Founder @ Code The Change Jan 2015 – Jan 2017 | Greater Los Angeles Area Co-founded student organization to build software for 5 local nonprofits and the Los Angeles Mayor’s Office. Grew from 2 founding members to 35 members in two years. ### Summer Research Intern @ The Cooper Union Jan 2012 – Jan 2012 Researched and developed designs for both a LEED platinum skyscraper, and a solar/wind/hydro powered boathouse alongside peers. ## Education ### Bachelor of Science (B.S.) in Computer Science University of Southern California Jan 2013 – Jan 2017 ### New York City High School Regents Diploma in Bard College Associate's Degree Bard High School Early College Jan 2009 – Jan 2013 ## Contact & Social - LinkedIn: https://linkedin.com/in/liamdanielduffy --- Source: https://flows.cv/liamduffy JSON Resume: https://flows.cv/liamduffy/resume.json Last updated: 2026-04-01