Equilibrium
Plans and runs qualitative market-research studies end to end; a year of business logic at Endpoint
A NestJS and GraphQL backend behind a React front end for running qualitative research projects end to end: screener questionnaires, responses mapped onto an interaction matrix, respondent samples distributed across profiles and demographics, and report authoring. The hard part was the business logic, lots of many-to-many relations that were hard to keep track of, built across both repos, May 2024 to July 2025.