1159 - Senior Full-Stack Software Engineer

GoFasti; United States; Remote; USD 33,000 - 36,000; Full time

Job summary

GoFasti is a remote-first talent-as-a-service company connecting LatAm developers with global clients. We seek a Senior Full-Stack Software Engineer, based in Latin America, to work remotely on a TypeScript/Node backend and Next.js frontend with fintech data workflows.

You will engage in security-centric development, on-call ownership, and continuous learning in a fast-changing environment. The role emphasizes strong communication, proactive collaboration, and the ability to review AI-assisted

Qualifications

• 6+ years as a software engineer with 3+ years shipping production TS/Node backends.
• Experience with payments or fintech data securely (Plaid, Stripe, etc.).
• Deep PostgreSQL with migrations, indexes, transactions, and query plans.
• Security-first approach to PII, encryption at rest, and least privilege.

Responsibilities

• Maintain a TypeScript monorepo with Next.js web app, API, Expo app, and Cloudflare Worker.
• Manage shared PostgreSQL models and migrations across apps.
• Handle webhook integrations, queued jobs, and background processing.
• Ensure secure handling of tokens and per-user data scope across web and mobile.
• Develop AI layer features: tool-calling, memory, and proactive insights.
• Review AI-generated code for quality and security.

Skills

TypeScript/Node

Backend development

SQL/PostgreSQL

Security-focused coding

On-call ownership

Tools

Next.js

React

Prisma

Cloudflare Worker

Job description

We Make Remote Work Remarkable - TopTalent from LatAm

Hello! We are GoFasti, a Talent-as-a-Service. GoFasti bridges the gap between world-class developers and designers from LatAm and first-class companies around the globe.

We need an English-fluent Senior Full-Stack Software Engineer, based in Latin America, available to work remotely.

We are looking for someone with exceptional communication and relationship-building skills, who embraces changes while maintaining strong attention to detail. An interested and proactive person, who's constantly learning and improving their skills.

Are you the one we are looking for?

Responsibilities:

• A TypeScript monorepo: a Next.js 16 web app and API, an Expo mobile app, and a Cloudflare Worker.
• A PostgreSQL + Prisma data model with dozens of models and a long migration history, shared across apps.
• Background systems: webhook handlers (Plaid, Stripe, Linq), queued inbound-message batching, and scheduled jobs.
• Security-sensitive paths: encrypted bank tokens and chat content, per-user data scoping, auth across web and mobile.
• The AI layer: LLM tool-calling over users' financial data, long-term memory, and proactive insights.
• Reviewing AI-generated code, including your own, with a skeptical eye.

Requirements:

• 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.
• LLMs in production: tool-calling, prompt evaluation, cost and latency control.
• Next.js App Router and React Server Components.
• SMS or messaging compliance (opt-outs, TCPA), or Stripe subscription billing.
• Expo / React Native.

Compensation:

The salary range offered for this position varies from (USD) $3,000 - $3,200 per month, depending on seniority and skillset.

This position is for a full time contract, through a payroll platform.

The talent will work remotely allocated at our client.

Thank you!