C++ Engineer - High Performance Computing (HPC)

* Design, build, and optimize high-performance C++ systems supporting AI data pipelines and evaluation workflows * Develop full-stack tooling and backend services for large-scale data annotation, validation, and quality control * Improve reliability, performance, and safety across production C++ codebases * Identify bottlenecks and edge cases in data and system behavior, then implement scalable, robust fixes * Collaborate with data, research, and engineering teams to support model training and evaluation workflows * Participate in synchronous design reviews to iterate on architecture and implementation decisions

Who You Are

* 5+ years of professional experience writing production-grade C++ — modern standards (C++17 or C++20) preferred * Deep understanding of computer architecture, SIMD intrinsics, and cache coherency to optimize compute-heavy AI workloads * Expert in lock-free programming and maximizing parallelism using threading libraries * Full-stack developer background with a strong systems programming foundation * Native or fluent English speaker with clear written and verbal communication skills * Able to commit 20–40 hours per week consistently

Nice to Have

* Prior experience with data annotation, data quality, or evaluation systems * Familiarity with AI/ML workflows, model training, or benchmarking pipelines * Experience with distributed systems or developer tooling * Background in HPC, game engines, or other performance-critical domains

Why Join Us

* Work directly with leading AI labs on real production systems — not toy projects * Fully remote and flexible — work on your schedule, from anywhere * Freelance autonomy with the structure of meaningful, high-impact engineering work * Tackle genuinely hard technical problems at the frontier of AI infrastructure * Potential for ongoing work and contract extension as new projects launch