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GoFasti

Senior Full-Stack Software Engineer

GoFasti

. Work on a TypeScript monorepo containing a Next.js 16 web app and API, an Expo mobile app, and a Cloudflare Worker .

Posted 10/7/2026full-timeRemote • New York • United StatesSenior💰 $9,200 - $10,000 per monthWebsite

Tech Stack

Tools & technologies
JavaScriptNext.jsNode.jsPostgresReactReact NativeTypeScript

About the role

Key responsibilities & impact
  • Work on a TypeScript monorepo containing a Next.js 16 web app and API, an Expo mobile app, and a Cloudflare Worker
  • Maintain a PostgreSQL and Prisma data model shared across applications
  • Develop and maintain webhook handlers for Plaid, Stripe, and Linq
  • Work on queued inbound-message batching and scheduled jobs
  • Handle security-sensitive systems involving encrypted bank tokens, encrypted chat content, per-user data scoping, and authentication across web and mobile
  • Build and maintain the AI layer, including LLM tool-calling over users' financial data, long-term memory, and proactive insights
  • Review AI-generated code, including personal contributions, critically

Requirements

What you’ll need
  • English-fluent; written English sufficient for PR descriptions or incident write-ups without follow-up questions
  • 6+ years as a software engineer
  • 3+ years shipping production TypeScript/Node backends
  • Shipped work at a company that moved money or handled bank or card data
  • Deep PostgreSQL knowledge, including live-data-safe migrations, indexes, transactions, and query plans
  • Real experience with asynchronous systems, including idempotency, retries, webhook deduplication, and partially failed jobs
  • Security-first approach to PII, encryption at rest, authentication tokens, and least privilege
  • Solo ownership of production, including on-call, error tracking, and root-cause analyses
  • Daily use of AI coding tools such as Claude Code, Cursor, or similar
  • Preferred location: New York, preferably Manhattan
  • Plus: Production Plaid experience; production LLM experience; Next.js App Router and React Server Components; SMS or messaging compliance or Stripe subscription billing; Expo / React Native

Benefits

Comp & perks
  • Full-time contract through a payroll platform
  • Remote work