About the Role

What if the code you write could directly power the AI systems shaping how millions of people interact with technology? We're looking for Back End Developers in Buenos Aires to design, build, and optimize the server-side systems and APIs that drive cutting-edge AI products - from data pipelines and model-serving infrastructure to scalable microservices that handle real-world traffic at scale.

This is a fully remote, versátil contract role. Whether you're a seasoned engineer looking for meaningful project work or a strong developer ready to apply your skills to AI-adjacent infrastructure, this is your chance to build things that matter.
- Organization: Alignerr
- Type: Hourly Contract
- Location: Remote
- Commitment: 10-40 hours/week

What You'll Do
- Design, develop, and maintain robust back end services, APIs, and data pipelines
- Build scalable, high-performance server-side architecture to support AI training and inference workloads
- Write clean, well-documented, and testable code following engineering best practices
- Integrate with databases, message queues,



cloud services, and third-party APIs
- Optimize system performance, reliability, and scalability as usage grows
- Collaborate asynchronously with distributed teams of engineers, researchers, and product leads
- Troubleshoot production issues, conduct code reviews, and contribute to architectural decisions
- Work independently on task-based and project-based assignments on your own schedule

Who You Are
- Proficient in one or more back end languages - Python, Go, Java, Node.js, Rust, or similar
- Solid understanding of RESTful API design, microservices architecture, and distributed systems
- Experienced with relational and/or NoSQL databases - PostgreSQL, MongoDB, Redis, etc.
- Comfortable working with cloud platforms such as AWS, GCP, or Azure
- Familiar with version control (Git), CI/CD pipelines, and containerization (Docker, Kubernetes)
- Strong problem-solving skills and the ability to

📌 Back End Developer (Rincón de los Sauces)
🏢 Alignerr
📍 Rincón de los Sauces