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Senior Backend Engineer (C#) - AI Data Platform
Alignerr
Denver, CO
Position Overview Senior Backend Engineer (C#) --- AI Data Platform About The Role What if your C# expertise could directly shape the inf...
$50.00 – $75.00/hr Apply Now
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
Hadoop Developer
Covetus
Addison, TX
Position Overview Only Full time role, No H1B **Note- OPT, USC and GC and GC Ead will work.** Job Overview **1. Role- Hadoop developer** ...
$100k – $120k/year Apply Now
IOS Developer
Pyramid Consulting, Inc
Plano, TX
Position Overview Immediate need for a talented IOS Developer for an 11-month contract opportunity in Plano, TX (Hybrid). Job ID: 26-11758 P...
$60.00 – $65.00/hr Apply Now
Mobile Application Developer
LanceSoft, Inc.
McLean, VA
Role: Mobile Technology Lead Location: McLean, VA -- 100% ONSITE Hiring Mode: Contract (6+ months) Pay: $70/Hr. Role Description: The Mob...
$70.00 – $70.00/hr Apply Now
ServiceNow Developer
Largeton Group
Richmond, VA
ServiceNow Developer role at CapitalOne with locations in McLean, VA; Richmond, VA; Plano, TX (Local candidates only; in-person intervie...
$55.00 – $60.00/hr Apply Now
Frontend Web Developer
Air Apps
San Francisco, CA
Position Overview Front-End Web Developer at Air Apps Job Overview Crafting seamless, high-performance, and visually engaging web experie...
$99k – $170k/year Apply Now
ETL Developer
Rose International
BatonRouge, LA
About this job Date Posted: 04/14/2026 Job overview Hiring Organization: Rose International What you'll do Design, develop, and mainta...
$60.00 – $60.00/hr Apply Now
Software Developer - Loan & Lease Servicing
Robert Half
Torrance, Ca
About this job Description Job overview We are looking for a skilled Software Developer to join our team in Southern California. This long-t...
$55.00 – $55.00/hr Apply Now
Gift Registry Consultant, Manhasset - Full Time
Macy's
Manhasset, NY
Be part of an amazing story. Macy's is more than just a store. We're a story. One that's captured the hearts and minds of America for more th...
$20.42 – $33.42/hr Apply Now
Senior Backend Engineer (C#) - AI Data Platform

Position Overview Senior Backend Engineer (C#) --- AI Data Platform About The Role What if your C# expertise could directly shape the infrastructure powering the next generation of AI?...

$50.00 – $75.00/hr Apply Now

Position Overview
  • Senior Backend Engineer (C#) --- AI Data Platform
About The Role
  • What if your C# expertise could directly shape the infrastructure powering the next generation of AI? We're looking for a Senior Backend Engineer to design and build the data pipelines, annotation tooling, and evaluation systems that leading AI labs depend on to train and improve their most advanced models.
  • This is a fully remote, flexible contract role for a seasoned engineer who thrives on solving hard systems problems and wants their work to matter at scale.
  • Organization: Alignerr
  • Type: Hourly Contract
  • Location: Remote
  • Commitment: 20--40 hours/week
What You'll Do
  • Design, build, and optimize high-performance C# systems supporting large-scale AI data pipelines and evaluation workflows
  • Develop backend services and tooling for data annotation, validation, and quality control at scale
  • Improve the reliability, performance, and safety of existing C# codebases
  • Collaborate with data, research, and engineering teams to accelerate model training and evaluation
  • Identify and resolve bottlenecks and edge cases across data and system behavior
  • Participate in synchronous design reviews and iterate rapidly on architecture and implementation decisions
Who You Are
  • 5+ years of professional experience building scalable backend services in C#
  • Strong systems programming background with full-stack development experience
  • Deep expertise in modern frameworks for RESTful APIs and RPC services
  • Experienced with cloud-native data services and message bus architectures for workflow orchestration
  • Native or fluent English speaker with clear written and verbal communication skills
  • Self-directed and reliable --- able to commit 20--40 hours per week and deliver independently
Nice to Have
  • Prior experience with data annotation platforms, data quality pipelines, or evaluation systems
  • Familiarity with AI/ML workflows, model training pipelines, or benchmarking infrastructure
  • Experience with distributed systems design or developer tooling
  • Background working directly with or alongside AI research teams
Why Join Us
  • Work on real production systems used by leading AI research labs --- not toy projects
  • Fully remote and asynchronous-friendly --- work from wherever you do your best work
  • Flexible contract structure with meaningful, high-impact technical work
  • Collaborate with top engineers and researchers pushing the boundaries of AI
  • Potential for ongoing contract extensions as projects grow and new initiatives launch
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