C++ Backend Engineer - AI Data Platforms

C++ Backend Engineer — AI Data PlatformsAbout The RoleWhat if your systems programming expertise could directly shape the infrastructure powering next-generation AI? We're looking for senior C++ engineers to build, optimize, and scale the data pipelines, annotation tooling, and evaluation systems that leading AI labs depend on.This is a fully remote contract role with meaningful technical depth — real production systems, real impact, and the kind of engineering challenges that actually push your skills forward.Organization: AlignerrType: Hourly ContractLocation: RemoteCommitment: 20–40 hours/weekWhat You'll DoDesign, build, and optimize high-performance C++ systems supporting large-scale AI data pipelines and evaluation workflowsDevelop backend services and tooling for data annotation, validation, and quality control at scaleImprove reliability, performance, and safety across existing C++ codebasesIdentify bottlenecks and edge cases in system and data behavior — then implement clean, scalable fixesCollaborate with data, research, and engineering teams to support model training and evaluation workflowsParticipate in synchronous design reviews to iterate on architecture and implementation decisionsWho You AreNative or fluent English speaker with clear written and verbal communication5+ years of professional experience writing production-grade C++Strong background in asynchronous network programming — event loops, RPC frameworks, or high-performance microservicesExperienced working with high-throughput databases or message queuesFull-stack developer mindset with a deep systems programming foundationAble to commit 20–40 hours per week consistentlyNice to HavePrior experience with data annotation, data quality pipelines, or evaluation systemsFamiliarity with AI/ML workflows, model training, or benchmarking infrastructureExperience with distributed systems design or developer toolingWhy Join UsWork directly with leading AI research labs on systems that matterFully remote — work from wherever you do your best thinkingFlexible contract engagement with meaningful, high-impact technical workCollaborate with top-tier engineers across data, research, and infrastructurePotential for ongoing work and contract extension as projects scale