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Seattle
Senior Backend Engineer (C#) - AI Data Platform
Alignerr
Seattle, WA
Position Overview Senior Backend Engineer role at Alignerr for their AI Data Platform Fully remote hourly contract position with flexible ho...
$50.00 – $75.00/hr Apply Now
Senior C Full-Stack Engineer — AI Data & Infrastructure
Alignerr
Seattle, WA
Position Overview Fully remote, flexible contract role for Senior C++ Engineers at Alignerr Opportunity to work on high-performance ...
$50.00 – $75.00/hr Apply Now
JavaScript Developer
Alignerr
Seattle, WA
Position Overview Fully remote, flexible contract role with Alignerr No AI background required, just deep JavaScript knowledge Job Overvie...
$60.00 – $90.00/hr Apply Now
Quantitative Analyst (Quant)
Alignerr
Seattle, WA
What if your quantitative expertise could directly shape how AI reasons about financial models, risk, and forecasting for millions of users w...
$40.00 – $80.00/hr Apply Now
Aesthetic Nurse Practitioner
Pinch
Seattle, WA
Position Overview Grow your aesthetics practice with more flexibility, autonomy, and support under the Pinch brand. Opportunity for experien...
$10k – $250k/year Apply Now
C# Infrastructure Engineer - Data Pipelines
Alignerr
Seattle, WA
About this job C# Infrastructure Engineer — Data Pipelines (AI Training) About The Role What if your C# skills could directly shape the infra...
$50.00 – $75.00/hr Apply Now
Senior Rust Engineer — AI Data & Infrastructure
Alignerr
Seattle, WA
About The Role What if your systems programming expertise could directly shape the infrastructure behind some of the world's most advanced A...
$50.00 – $75.00/hr Apply Now
Data Infrastructure Developer (C++)
Alignerr
Seattle, WA
About The Role What if your systems programming expertise could directly shape the infrastructure powering the world's most advanced AI mode...
$50.00 – $75.00/hr Apply Now
Sales Engineer
Finvari
Seattle, WA
Position Overview As a Sales Engineer, you'll bring your technical expertise to life through compelling product demos, consultative disc...
$140k – $160k/year Apply Now
Software Engineer, Loans Originations
SoFi
Seattle, WA
Position Overview Join us in revolutionizing the lending landscape. SoFi is seeking enthusiastic Software Engineers who are ready to learn a...
$106k – $198k/year Apply Now
Senior Backend Engineer (C#) - AI Data Platform

Position Overview Senior Backend Engineer role at Alignerr for their AI Data Platform Fully remote hourly contract position with flexible hours Opportunity to work on high-performance data...

$50.00 – $75.00/hr Apply Now

Position Overview
  • Senior Backend Engineer role at Alignerr for their AI Data Platform
  • Fully remote hourly contract position with flexible hours
  • Opportunity to work on high-performance data pipelines, annotation tooling, and evaluation systems for AI labs
What You'll Do
  • Design, build, and optimize high-performance backend systems in C# for AI data pipelines
  • Develop backend services and tooling for data annotation, validation, and quality control
  • Build and maintain RESTful APIs and RPC services for inter-service communication
  • Integrate with cloud-native data services and orchestrate workflows via message bus architectures
  • Identify and fix bottlenecks, edge cases, and reliability issues in existing codebases
  • Collaborate with research and engineering teams on model training and evaluation workflows
  • Participate in design reviews and iterate on system architecture decisions
Who You Are
  • 5+ years of experience building scalable backend services in C#
  • Proficient in modern C# frameworks for RESTful APIs and RPC-based communication
  • Experienced with cloud-native data services and message bus architectures
  • Strong problem-solving skills and ability to architect scalable solutions
  • Effective written and verbal communicator, comfortable in cross-functional teams
  • Native or fluent English speaker, able to commit 20-40 hours per week
Nice to Have
  • Experience with data annotation platforms, data quality systems, or evaluation pipelines
  • Familiarity with AI/ML workflows, model training, or benchmarking infrastructure
  • Knowledge of distributed systems design or developer tooling
  • Full-stack background with frontend exposure alongside strong backend skills
Why Join Us
  • Work on cutting-edge AI projects with leading research labs
  • Fully remote work environment with flexibility
  • Freelance autonomy with impactful engineering work
  • Contribute to shaping next-generation AI systems
  • Potential for ongoing work and contract extension
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