About the role

Full Stack Engineer leading backend architecture and platform development for Commons’ sustainable spending app. Building end-to-end features, integrations, infrastructure, and security.

Responsibilities

Build features end to end, from database to UI, and review pull requests
Design and evolve core data models and review migrations
Own third-party integrations and make build-versus-buy decisions
Run CI/CD using GitHub Actions and CircleCI
Manage monitoring with New Relic and Sentry
Maintain infrastructure on Render, Postgres, and Redis
Lead infrastructure-related outages and escalations
Keep dependencies up to date and simplify the technology stack
Work with the data team to improve privacy and security practices
Help build AI coding tools and workflows across the team
Lead backend architecture and own backend and platform decisions
Collaborate with product, design, marketing, and data teams on new features and capabilities
Explain technical decisions in code reviews and design discussions
Build across frontend, backend, mobile, and web surfaces as needed

5+ years building production software across the stack, with most depth on the backend; fewer years may be considered with the right experience
Experience building and shipping features end to end
Experience building backend systems from the ground up and owning production at a startup
Experience setting up CI, adding monitoring, and responding to outages or emergencies
Strong knowledge of Postgres, including designing schemas from scratch and running migrations on active systems
Experience building and maintaining third-party integrations and making build-versus-buy decisions
Serious commitment to data security and privacy
Deep experience with AI and agentic coding tools
Ability to explain technical tradeoffs to nontechnical audiences
Interest in tackling new and different problems
Preference for an individual contributor role rather than management
Must provide work authorization information and location during application