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Senior Backend Engineer; C AI Data Platform

Job in Denver, Denver County, Colorado, 80285, USA
Listing for: Alignerr
Full Time position
Listed on 2026-01-12
Job specializations:
  • IT/Tech
    Data Science Manager, AI Engineer
Salary/Wage Range or Industry Benchmark: 50 - 75 USD Hourly USD 50.00 75.00 HOUR
Job Description & How to Apply Below
Position: Senior Backend Engineer (C#) - AI Data Platform

Join to apply for the Senior Backend Engineer (C#) – AI Data Platform role at Alignerr.

This range is provided by Alignerr. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.

Base Pay Range

$50.00/hr – $75.00/hr

Employment Details

Employment Type: Contract
Location: Remote
Commitment: 20–40 hours/week

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.

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

Referrals increase your chances of interviewing at Alignerr by 2x.

Apply BELOW

Position Requirements
10+ Years work experience
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