Senior AI-Native Engineer - Remote, High-Impact SaaS

The Flex; Buenos Aires; Remote; ARS 181,747,000 - 272,620,000; Full time

Benefits offered by this job

Contractor agreement (USD)

100% remote work

Argentina public holidays

English classes

Referral program

Learning platforms access

Job summary

Darwoft in LATAM is seeking a Senior/Staff Software Engineer to drive AI-native software development using Claude Code, Codex, and other AI coding agents to accelerate delivery. You will own architecture, navigate a large production codebase, design scalable backend and SaaS capabilities, and improve reliability while balancing speed and quality in a remote, contractor setting.

Join a world-class, remote-first team building a modern transaction platform with strong engineering standards and a

Qualifications

• Production-grade software experience and ability to operate in production environments.
• Strong fundamentals in architecture, system design, debugging, testing, and maintainability.
• Experience with large or complex existing codebases and modern web apps/SaaS.
• Proficient in backend or full-stack development and APIs & distributed systems.
• Familiarity with cloud environments, CI/CD, and observability practices.

Responsibilities

• Navigate and evolve a large production codebase with pragmatism.
• Design and implement new capabilities across a complex SaaS platform.
• Make architectural decisions as the product scales.
• Identify debt, risks, and reliability issues, and improve systems.
• Use Claude Code, Codex, Cursor, Copilot, Windsurf, or similar AI agents extensively.
• Improve development workflows, testing, automation, and production readiness.

Skills

Production systems

Architecture design

Large codebases

Backend/full-stack

Web apps SaaS

APIs & distributed

Cloud environments

CI/CD

Ownership

Product mindset

Tools

Claude Code

OpenAI Codex

Cursor

GitHub Copilot

Windsurf

Job description

Darwoft in LATAM is seeking a Senior/Staff Software Engineer to drive AI-native software development using Claude Code, Codex, and other AI coding agents to accelerate delivery. You will own architecture, navigate a large production codebase, design scalable backend and SaaS capabilities, and improve reliability while balancing speed and quality in a remote, contractor setting.

Join a world-class, remote-first team building a modern transaction platform with strong engineering standards and a