Software Engineer (C#) - Internal Tooling

Alignerr • New York City, NY

50d • $50 - $75 • Remote

About The Position

Alignerr connects top technical experts with leading AI labs to build, evaluate, and improve next-generation models. We work on real production systems and high-impact research workflows across data, tooling, and infrastructure. Position Senior C# Full-Stack Engineer — AI Data & Infrastructure

Requirements

• Native or fluent English speaker
• Full-stack developer experience with a strong systems programming background
• 3-5+ years of professional experience writing production C#.
• Expertise in interoperability scenarios, such as invoking Python ML models from .NET or wrapping native libraries.
• Experience designing robust harnesses for benchmarking and evaluating system performance.
• Clear written and verbal communication skills.
• Ability to commit 20–40 hours per week.

Nice To Haves

• Prior experience with data annotation , data quality, or evaluation systems
• Familiarity with AI/ML workflows, model training, or benchmarking pipelines
• Experience with distributed systems or developer tooling

Responsibilities

• Design, build, and optimize high-performance systems in C# supporting AI data pipelines and evaluation workflows
• Develop full-stack tooling and backend services for large-scale data annotation , validation, and quality control
• Improve reliability, performance, and safety across existing C# codebases
• Collaborate with data, research, and engineering teams to support model training and evaluation workflows
• Identify bottlenecks and edge cases in data and system behavior, and implement scalable fixes
• Participate in synchronous reviews to iterate on system design and implementation decisions

What This Job Offers

• Job Type: Part-time
• Career Level: Mid Level
• Education Level: No Education Listed