About the Job

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

Type: Contract, Remote Commitment: 20–40 hours/week Compensation: Competitive, hourly (based on experience)

Role 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

Qualifications

Must-Have

– Native or fluent English speaker

– Full-stack developer experience with a strong systems programming background

– 5+ years of professional experience writing production C#.

– Strong background in building streaming data pipelines using asynchronous streams and reactive programming concepts.

– Experience optimizing I/O-bound operations and implementing resilient retry policies for distributed data ingestion.

– Clear written and verbal communication skills.

– Ability to commit 20–40 hours per week.

Preferred

– 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

Application Process

– Submit your resume

– Complete a short technical screening

– Project matching and onboarding

$50 – $75 an hour