Senior C# Engineer for AI Infra Tooling (Remote)

Alignerr Corp.; United States; Remote; MXN 1,011,000 - 1,770,000; Part time

Job summary

Alignerr is seeking a senior software engineer to join internal tooling for AI infrastructure. You will write production C# code to power AI data pipelines, annotation systems, and evaluation tooling used by leading AI labs.

The role emphasizes interoperability with Python ML models from .NET, building benchmarking harnesses, and delivering scalable, robust systems. You’ll collaborate across data, research, and engineering teams and participate in design reviews.

Qualifications

• 3–5+ years of production-grade C# experience.
• Strong full-stack developer with systems programming foundation.
• Experience in interoperability calling Python ML models from .NET.
• Proven benchmarking harnesses and performance evaluation experience.
• Clear written and verbal communication.
• Native or fluent English speaker.
• Available to commit 20–40 hours per week.

Responsibilities

• Design and build high-performance C# systems for AI data pipelines and evaluation workflows.
• Develop full-stack tooling and backend services for data annotation, validation, and quality control at scale.
• Improve reliability, performance, and correctness across existing C# codebases.
• Build benchmarking and evaluation harnesses to measure system behavior.
• Implement interoperability solutions — calling Python ML models from .NET or wrapping native libraries.
• Identify bottlenecks and ship scalable, well-reasoned fixes.
• Collaborate with data, research, and engineering teams across model training and evaluation workflows.
• Participate in synchronous design reviews to iterate on architecture and implementation decisions.

Skills

C# proficiency

Full-stack development

Systems programming

Interoperability (Python .NET)

Benchmarking harnesses

Communication

English fluency

20–40 hours/week commitment

Tools

.NET

Python

Job description

Alignerr is seeking a senior software engineer to join internal tooling for AI infrastructure. You will write production C# code to power AI data pipelines, annotation systems, and evaluation tooling used by leading AI labs.

The role emphasizes interoperability with Python ML models from .NET, building benchmarking harnesses, and delivering scalable, robust systems. You’ll collaborate across data, research, and engineering teams and participate in design reviews.