1159 - Senior Full-Stack Software Engineer
GoFasti
WorldwideremotePosted 16 days ago
Skill Required
Full-Stack-EngineerFull-Stack-DeveloperSoftware-EngineerSenior-Full-Stack-Engineering¿Senior-Fullstack-EngineeringSenior-Full-Stack-Engineer-(React-Node.Js)Senior-Full-Stack-Engineer-(JavaScript-Python)Senior-Fullstack-DeveloperSenior-Full-Stack-Engineer-(Java-+-Cloud)Senior-Full-Stack-DevelopmentFull Stack DeveloperSoftware EngineerSoftware DeveloperReact NativeTypeScriptPostgreSQLCryptographysimilar)Next.jssecuritybuildingwrittenReactjQueryNode.jsGenerative AIUnityandGoAIFulltime
Key highlights
- Salary range: $3,000 - $3,200 per month
- Required experience: 6+ years as a software engineer, 3+ years shipping production TypeScript/Node backends
- Key benefit: Full-time contract through a payroll platform
- Notable requirement: Shipped work at a company handling bank or card data (Plaid, Stripe Treasury, etc.)
Role overview
We are GoFasti, a Talent-as-a-Service platform connecting world-class developers and designers from Latin America with global companies. We seek an English-fluent Senior Full-Stack Software Engineer based in Latin America, available for remote work. The ideal candidate should have strong communication skills, embrace change, and maintain attention to detail. They should be proactive, constantly learning, and improving their skills.
Responsibilities
- Work with a TypeScript monorepo: a Next.js 16 web app and API, an Expo mobile app, and a Cloudflare Worker.
- Manage a PostgreSQL + Prisma data model with dozens of models and a long migration history, shared across apps.
- Develop and maintain background systems: webhook handlers (Plaid, Stripe, Linq), queued inbound-message batching, and scheduled jobs.
- Handle security-sensitive paths: encrypted bank tokens and chat content, per-user data scoping, auth across web and mobile.
- Build and review the AI layer: 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
- 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.
Nice to have
- 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.
Benefits
- 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.
Additional details
- The talent will work remotely allocated at our client.
- Here are the steps for this process: Application review/approval > Screening interview with GoFasti's team > We build and send your profile to our client > Profile review/approval by client > Interview with the client > Hiring and onboarding.
- Once you apply for the job, our team will review your resume. If it meets the requirements, we will contact you and move forward in the process.
- Note for Candidates Approached Directly: If you were contacted directly by a member of our team and are interested in this opportunity, please do not apply through this link. Instead, reach out to the person who contacted you to coordinate a meeting.