Remote Senior C# AI Data & Infra Engineer

Alignerr Corp.; United States; Remote; MXN 1,017,000 - 1,781,000; Full time

Benefits offered by this job

Fully remote

Job summary

Alignerr is seeking a Senior C# Full-Stack Engineer to design and optimize data pipelines, annotation tooling, and evaluation systems used by leading AI labs. This is a fully remote hourly contract, with 20–40 hours per week and integration with data, research, and infrastructure teams.

You will build high-performance C# services, develop full-stack tooling for annotation and quality control, and push reliability and memory safety in production code.

Qualifications

• 3–5+ years of professional experience writing production C# code.
• Strong background in performance optimization, concurrency, and memory safety.
• Able to commit 20–40 hours per week consistently.
• Native or fluent English communication skills.
• Self-directed and comfortable working autonomously in a remote environment.

Responsibilities

• Design, build, and optimize high-performance C# systems that power 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 production C# codebases.
• Collaborate with data, research, and engineering teams to support model training and evaluation infrastructure.
• Identify bottlenecks and edge cases in data and system behavior — then implement scalable, production-ready fixes.
• Participate in synchronous design reviews to iterate on architecture and implementation decisions.

Skills

C#

Full-stack

Systems programming

Concurrency

Memory safety

Job description

Alignerr is seeking a Senior C# Full-Stack Engineer to design and optimize data pipelines, annotation tooling, and evaluation systems used by leading AI labs. This is a fully remote hourly contract, with 20–40 hours per week and integration with data, research, and infrastructure teams.

You will build high-performance C# services, develop full-stack tooling for annotation and quality control, and push reliability and memory safety in production code.