C++ Engineer - High Performance Computing (HPC)

C++ Engineer — High Performance Computing (HPC)About The RoleWhat if your mastery of C++ could directly shape the infrastructure powering the next generation of AI? We're looking for senior C++ engineers to build and optimize the high-performance systems, data pipelines, and evaluation tooling that leading AI labs depend on — working on real production code with tangible, measurable impact.This is a fully remote, flexible contract role for engineers who know how to write fast, clean, production-grade C++ and want to do meaningful work at the frontier of AI development.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 full-stack tooling and backend services for data annotation, validation, and quality control at scaleImprove reliability, performance, and safety across existing production C++ codebasesIdentify bottlenecks and edge cases in data and system behavior — then implement scalable, robust fixesCollaborate with data, research, and engineering teams to support model training and evaluation workflowsParticipate in synchronous design reviews to iterate on system 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 C++ — preferably modern C++17 or C++20Deep understanding of computer architecture, SIMD intrinsics, and cache coherency to optimize compute-heavy workloadsExperienced with lock-free programming and maximizing parallelism using threading librariesAble 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 or developer toolingWhy Join UsWork on cutting-edge AI infrastructure alongside leading research labsFully remote and flexible — work when and where it suits youFreelance autonomy with the structure of high-impact, production-grade engineering workMake a direct contribution to the systems that power next-generation AI modelsPotential for ongoing work and contract extension as new projects launch