Full-Stack Engineer

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Marathon Talent

WebsiteLinkedInAll Job Openings

1 - 10 employees

Founded 2023

🎯 Recruiter

🤝 B2B

Recruitment • B2B

Marathon Talent is a recruiting and talent strategy firm that helps companies hire top bilingual professionals from Latin America quickly. They provide end-to-end recruitment, fractional people and talent strategy, market research and salary studies, and advisory/mentorship services—powered by a network of 10,000+ professionals and flexible pricing (success fee, flat fee, or monthly retainer). Marathon embeds with client teams to solve hiring, compensation, culture, and org design challenges for startups and growing companies, with a focus on building bilingual LATAM teams and improving growth through better talent foundations.

📋 Description

• Build and ship features end to end across React Native (mobile), React (web dashboards), and a serverless TypeScript backend • Implement product flows from UI and data entry through API logic, persistence, and status/error handling • Write and consume clean API contracts, with shared validation schemas across mobile, web, and backend • Own integrations with financial and payment-rails partners, wiring third-party APIs and webhooks (payment processors, settlement rails, KYC, banking) into our services with idempotent, faulttolerant handling • Work in a serverless AWS stack (Lambda, DynamoDB) with TypeScript infrastructure-as-code • Collaborate with the frontend and backend leads, absorbing work on either side as priorities shift • Keep an eye on quality where it matters: typed interfaces, sensible tests, and correct handling of edge cases in a financial product • Help maintain a clean, shared monorepo where types and components are reused, not duplicated • Use AI-assisted development as your default workflow, and help keep our shared context docs current so teammates and agents stay informed

🎯 Requirements

• AI-native / AI-first mindset (highly preferred). You already build with AI tools (Claude Code, Cursor, Copilot) as a core part of your workflow, you know how to direct them to multiply your output across the stack, and you have the judgment to know where AI accelerates and where human verification is non-negotiable (financial logic, security, compliance) • 4+ years building full-stack web/mobile products in production • Strong TypeScript skills across both frontend and backend; you think in types, not just write them • Solid React experience, and either hands-on React Native or a clear track record of picking up new frontend frameworks fast • Production experience building backend services on Node.js, ideally serverless (Lambda or similar), with a NoSQL data store (DynamoDB or equivalent) • Genuine breadth: demonstrable evidence of owning production features end-to-end (UI, backend, data modeling, and release/debugging), not just one layer • Comfort working in a small team where you own entire features end-to-end and switch context often • Agency background is a strong plus: you've shipped across many projects and clients, and you context-switch without friction • Startup background is a strong plus: you're comfortable with ambiguity, ownership, and wearing several hats • Exposure to infrastructure-as-code (SST, CDK, Pulumi, or Terraform) is a plus Fintech or payments experience is a plus but not required • Strong english level.

🏖️ Benefits

• Remote work