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Senior Backend Engineer (C#) - AI Data Platform

Senior Backend Engineer (C#) - AI Data Platform

Remote

New york, United states

$ 75 /hour

Senior

Freelance

26-01-2026

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Skills

Communication C# Research Training Programming benchmarking

Job Specifications

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 building scalable backend services in C#.
Mastery of modern frameworks for building RESTful APIs and RPC services for inter-service communication.
Experience integrating with cloud-native data services and orchestrating workflows via message bus architectures.
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

About the Company

We're looking for experts to help train better AI. At Alignerr, we offer paid, flexible projects for writers, coders, and subject matter experts to refine and align advanced artificial intelligence. Work when you want, where you want. Apply today at Alignerr.com or through our open Job Postings. Know more