Senior Full-Stack Software Engineer

GoFasti

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

Posted 10/6/2026full-timeRemoteSenior💰 $3,000 - $3,200 per monthWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates extensive experience in TypeScript and Node.js development, with a strong focus on security practices and data management in financial applications. Proficient in PostgreSQL and async systems, with a solid understanding of AI coding tools and their application in production environments.

Highest-signal resume keywords

TypeScript DevelopmentPostgreSQL ExpertiseAsync Systems ExperienceSecurity Practices in SoftwareAI Coding Tools Utilization

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

TypeScriptNode.jsPostgreSQLPrismaWebhook DevelopmentAsync ProgrammingData EncryptionError TrackingRoot-Cause AnalysisAI Tool Utilization

Soft Skills

English FluencyCritical Review Skills

Tools & Technologies

Next.jsExpoCloudflare WorkerPlaidStripeLinq

Industry Keywords

Financial Data ManagementPII SecurityComplianceTransaction ProcessingMessaging Compliance

Tech Stack

Tools & technologies

JavaScriptNext.jsNode.jsPostgresReactReact NativeTypeScript

About the role

Key responsibilities & impact

Work across a TypeScript monorepo containing a Next.js 16 web app and API, an Expo mobile app, and a Cloudflare Worker
Maintain and extend a PostgreSQL + 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
Implement and maintain security-sensitive paths involving encrypted bank tokens, chat content, per-user data scoping, and authentication across web and mobile
Build and maintain the AI layer with LLM tool-calling over users' financial data, long-term memory, and proactive insights
Review AI-generated code, including your own, with a skeptical eye

Requirements

What you’ll need

English-fluent
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 (Plaid, Stripe Treasury, Unit, Synapse-era BaaS, card issuing, lending, payroll)
Deep PostgreSQL: migrations safe to run on live data, indexes, transactions, query plans
Real experience with async systems: idempotency, retries, deduplicating webhooks, jobs that fail halfway
A security-first instinct around PII, encryption at rest, auth tokens and least privilege
Solo ownership of production at least once: on-call, reading error tracking, writing root-cause analyses
Daily use of AI coding tools (Claude Code, Cursor or similar), and clear views on where they go wrong
Written English good enough that a PR description or incident write-up needs no follow-up questions
It's a plus: Plaid in production: webhooks, item re-authentication, transaction sync cursors
It's a plus: LLMs in production: tool-calling, prompt evaluation, cost and latency control
It's a plus: Next.js App Router and React Server Components
It's a plus: SMS or messaging compliance (opt-outs, TCPA), or Stripe subscription billing
It's a plus: Expo / React Native