Backend Developer - AI Data Services

Backend Developer - AI Data ServicesWhat if your C# expertise could directly shape the infrastructure powering the world's most advanced AI systems? We're looking for a seasoned C# engineer to design and build the data pipelines, annotation tooling, and evaluation systems that leading AI labs depend on to train and improve next-generation models.This is a fully remote contract role with meaningful, high-impact work on real production systems — not toy projects. If you thrive on complex engineering challenges and want your work to matter at scale, this is the opportunity.Organization: AlignerrType: Hourly ContractLocation: RemoteCommitment: 20–40 hours/weekWhat You'll DoDesign, build, and optimize high-performance C# systems that support AI data pipelines and model evaluation workflowsDevelop full-stack tooling and backend services for large-scale data annotation, validation, and quality controlImprove reliability, performance, and safety across existing C# codebasesCollaborate closely with data, research, and engineering teams to support model training and evaluation pipelinesIdentify bottlenecks and edge cases in data and system behavior — then implement scalable, production-ready fixesParticipate in synchronous design reviews to iterate on architecture and implementation decisionsWho You AreNative or fluent English speaker with clear written and verbal communication skillsFull-stack developer with a strong systems programming background5+ years of professional experience writing production-grade C#Strong skills in data modeling and database access — ORMs, micro-ORMs, and high-performance SQLExperienced building secure, well-documented endpoints for data access and manipulationAble to commit 20–40 hours per week consistentlyNice to HavePrior experience with data annotation, data quality systems, or evaluation pipelinesFamiliarity with AI/ML workflows, model training, or benchmarking infrastructureExperience with distributed systems or developer tooling at scaleWhy Join UsWork directly with leading AI research labs on systems that influence next-generation model developmentFully remote — work from wherever you do your best workFlexible contract engagement with a consistent, meaningful workloadCollaborate with a sharp, mission-driven team across data, research, and engineeringPotential for ongoing work and expanded scope as projects growApply now