Remote Backend Engineer, AI Data Pipelines & Evaluation

Alignerr; New York (NY); On-site; USD 83,000 - 124,000; Part time

Job summary

Alignerr is seeking an experienced C# Backend Engineer to design and optimize data pipelines, annotation tooling, and evaluation systems used by leading AI labs. This remote contract role focuses on production-grade infrastructure and collaborating with data, research, and engineering teams.

You should bring 5+ years of C# experience, strong API skills, and a track record in data modeling and high-performance SQL interactions.

Qualifications

• 5+ years of professional C# experience.
• Experience building data pipelines, annotation tooling, and evaluation systems.
• Strong API design and secure backend services.
• Ability to work asynchronously in a remote team.

Responsibilities

• Design, build, and optimize high-performance C# systems for data pipelines and model evaluation workflows.
• Develop full-stack tooling and backend services for large-scale data annotation, validation, and quality control.
• Improve reliability and performance across existing C# codebases.
• Collaborate with data, research, and engineering teams to accelerate model training and evaluation.
• Identify bottlenecks and implement production-ready fixes.

Skills

C# programming

APIs design

Data modeling

SQL/ORMs

Distributed systems

Tools

Entity Framework

Dapper

Job description

Alignerr is seeking an experienced C# Backend Engineer to design and optimize data pipelines, annotation tooling, and evaluation systems used by leading AI labs. This remote contract role focuses on production-grade infrastructure and collaborating with data, research, and engineering teams.

You should bring 5+ years of C# experience, strong API skills, and a track record in data modeling and high-performance SQL interactions.