What are the responsibilities and job description for the Software Engineer (C#) - Internal Tooling position at Alignerr?
Software Engineer (C#) — Internal Tooling (AI Infrastructure)
About The Role
What if your C# expertise could directly shape the infrastructure powering the next generation of AI? We're looking for experienced full-stack C# engineers to build and improve the systems that leading AI labs depend on — from data annotation pipelines to evaluation harnesses and quality control tooling.
This is a fully remote contract role with flexible commitment. You'll work on real production systems alongside data, research, and engineering teams at the frontier of AI development.
About The Role
What if your C# expertise could directly shape the infrastructure powering the next generation of AI? We're looking for experienced full-stack C# engineers to build and improve the systems that leading AI labs depend on — from data annotation pipelines to evaluation harnesses and quality control tooling.
This is a fully remote contract role with flexible commitment. You'll work on real production systems alongside data, research, and engineering teams at the frontier of AI development.
- Organization: Alignerr
- Type: Hourly Contract
- Location: Remote
- Commitment: 20–40 hours/week
- Design, build, and optimize high-performance C# systems 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 and resolve bottlenecks and edge cases in data and system behavior with scalable solutions
- Participate in synchronous design reviews to iterate on architecture and implementation decisions
- Build and maintain robust benchmarking and performance evaluation harnesses
- 3–5 years of professional experience writing production-grade C#
- Strong full-stack developer background with solid systems programming fundamentals
- Expertise in interoperability scenarios — such as invoking Python ML models from .NET or wrapping native libraries
- Experienced designing robust harnesses for benchmarking and evaluating system performance
- Native or fluent English speaker with clear written and verbal communication skills
- Able to commit 20–40 hours per week with reliability and consistency
- 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
- Background working with or alongside research teams in a fast-moving environment
- Work on cutting-edge AI projects alongside leading research labs
- Fully remote and flexible — work when and where it suits you
- Freelance autonomy with the structure of meaningful, high-impact technical work
- Build systems that directly influence how next-generation AI models are trained and evaluated
- Potential for ongoing work and contract extension as new projects launch
Salary : $50 - $75