C++ Engineer - High Performance Computing (HPC)

C++ Engineer — High Performance Computing (HPC) About The Role What if your deep systems programming expertise could directly shape the infrastructure powering the next generation of AI? We're looking for senior C++ engineers to build, optimize, and scale the high-performance systems that leading AI labs depend on — from data pipelines and annotation tooling to evaluation infrastructure and backend services. This is a fully remote, flexible contract role working at the frontier of AI development. If you live and breathe modern C++ and thrive on performance-critical engineering challenges, this is where your skills make the biggest impact. Organization: AlignerrType: Hourly ContractLocation: RemoteCommitment: 20–40 hours/week What You'll Do Design, build, and optimize high-performance C++ systems supporting AI data pipelines and evaluation workflowsDevelop backend services and full-stack tooling for large-scale data annotation, validation, and quality controlImprove reliability, performance, and safety across existing C++ codebasesIdentify and resolve bottlenecks and edge cases in data and system behavior with scalable, production-ready solutionsCollaborate with data, research, and engineering teams to support model training and evaluation workflowsParticipate in synchronous design reviews and contribute to system architecture decisions Who You Are 5+ years of professional experience writing production-grade C++ — you're fluent in modern standards (C++17 or C++20 preferred)Deep understanding of computer architecture, SIMD intrinsics, and cache coherency — you know how to squeeze performance out of compute-heavy workloadsExpert in lock-free programming and maximizing parallelism using threading librariesStrong full-stack developer with a solid systems programming backgroundNative or fluent English speaker with clear written and verbal communication skillsAvailable to commit 20–40 hours per week consistently Nice to Have Prior experience with data annotation, data quality pipelines, or evaluation systemsFamiliarity with AI/ML workflows, model training, or benchmarking pipelinesExperience with distributed systems or developer toolingBackground in high-performance computing, game engines, or financial systems Why Join Us Work on cutting-edge AI projects alongside leading research labs at the frontier of the fieldFully remote and flexible — work from wherever you do your best thinkingFreelance autonomy with the structure of meaningful, high-impact engineering workTackle genuinely hard performance and systems challenges that push the limits of modern C++Potential for ongoing work and contract extension as new projects launch