Proper AI is an AI-first accounting service built for property managers and real estate operators.

By combining automation, technology, and a global team of accounting experts, we deliver faster, more accurate financial operations at scale.

We’re a team of builders, problem-solvers, and operators from around the world, working together to modernize one of the most critical functions in real estate.

Learn more at Proper.ai

We are looking for a Senior Software Engineer with strong backend and systems fundamentals to help own the core of our platform: the services, data models, and automations behind workflow and productivity tooling for B2B accounting operations.

This is a depth role, not a breadth role. The work is logic-heavy — multi-service data flows, third-party platform integrations, and document-processing pipelines where correctness matters more than surface area. The engineer will be a technical counterpart to the Tech Lead on architecture, and will take ownership of our AI-backed document processing service.





The adecuado candidate is language-agnostic in outlook but deep in practice: comfortable moving between Go, Python, and TypeScript, and able to build a real working model of an unfamiliar system before changing it.
Key Responsibilities

Core Functional Responsibilities
- Design, build, and maintain backend services across a microservices estate (Go, NestJS/TypeScript, Python).
- Own the AI-backed document processing and classification service (Python/FastAPI): extraction quality, accuracy measurement, and the pipeline around it.
- Design and maintain integrations with third-party platforms, including authentication, sync cadence, retries, and recovery.
- Model data deliberately — schemas, migrations, and invariants that hold as the product changes.
- Debug across service boundaries: correlate behaviour across multiple systems and databases to find the actual cause.
- Build observability and provenance into automated flows: actions should be traceable,

📌 Senior Software Engineer (Argentina)
🏢 Proper AI
📍 Argentina