Senior AI-Native Engineer: Build Scalable SaaS, Remote

Remote Jobs; Buenos Aires; Remote; ARS 136,310,000 - 272,620,000; Full time

Benefits offered by this job

Contractor agreement

100% remote work

Argentina's public holidays

English classes

Referral program

Access to learning platforms

Job summary

Darwoft is seeking a Senior/Staff Software Engineer for an AI‑native, AI coding‑assisted platform serving LATAM customers. You will work on a modern transaction/AI‑powered SaaS product, navigate a large codebase, and shape architecture with pragmatic decisions.

You will use AI agents to accelerate delivery, collaborate with product leadership, and raise reliability, testing, and observability across services while shipping impactful features.

Qualifications

• Strong professional experience building and operating production software systems.
• Excellent software engineering fundamentals including architecture, system design, debugging, testing, and maintainability.
• Experience with large or complex existing codebases.
• Backend or full‑stack experience using modern languages and frameworks.
• Experience building modern web applications and SaaS products.
• Strong understanding of APIs, architecture, data modeling, integrations, and distributed systems.
• Experience with relational databases and production data environments.
• Strong understanding of automated testing and modern software practices.
• Familiarity with cloud environments, CI/CD pipelines, deployments, and production operations.
• Ability to reason through technical trade‑offs and make pragmatic architectural decisions.
• Strong ownership and ability to work independently in evolving product environments.
• Product mindset: understanding why a solution should be built.

Responsibilities

• Navigate, understand, and evolve a large existing production codebase.
• Design and implement new product capabilities across a complex SaaS platform.
• Make pragmatic architectural and system design decisions as the product scales.
• Identify technical debt, architectural risks, reliability issues, and improvement opportunities.
• Use Claude Code, Codex, Cursor, Copilot, or similar AI coding agents extensively.
• Leverage AI agents to explore codebases, design implementations, generate and refactor code, debug issues, write tests, and accelerate delivery.
• Build and evolve backend services, APIs, data models, and application workflows.
• Contribute across the stack when needed and strengthen automated testing, observability, and production readiness.
• Improve development workflows, tooling, automation, and engineering practices.
• Troubleshoot complex issues across application, data, and infrastructure layers.
• Balance speed with quality and long‑term maintainability.
• Collaborate with product leadership to translate business problems into technical solutions.
• Help a small team achieve greater development leverage through AI‑assisted engineering.

Skills

Production software systems

Architecture & design

Large codebases

Backend / full-stack

Web apps & SaaS

APIs & distributed systems

Relational databases

Automated testing

Cloud & CI/CD

Technical decision making

Ownership

Product mindset

Tools

Claude Code

OpenAI Codex

Cursor

GitHub Copilot

Windsurf

Job description

Darwoft is seeking a Senior/Staff Software Engineer for an AI‑native, AI coding‑assisted platform serving LATAM customers. You will work on a modern transaction/AI‑powered SaaS product, navigate a large codebase, and shape architecture with pragmatic decisions.

You will use AI agents to accelerate delivery, collaborate with product leadership, and raise reliability, testing, and observability across services while shipping impactful features.