C++ Engineer - High Performance Computing (HPC)
About this role
About the Role What if your expertise in high-performance C++ could directly shape the infrastructure powering next-generation AI? We're looking for a Senior C++ Engineer to build and optimize the systems that leading AI labs depend on — from data pipelines and annotation tooling to evaluation infrastructure that influences how frontier models are trained and benchmarked. This is a fully remote, flexible contract role for a seasoned systems engineer who wants meaningful, high-impact work at the cutting edge of AI development. - Organization: Alignerr - Type: Hourly Contract - Location: Remote - Commitment: 20–40 hours/week What You'll Do - Design, build, and optimize high-performance C++ systems supporting large-scale AI data pipelines and evaluation workflows - Develop full-stack tooling and backend services for data annotation, validation, and quality control at scale - Improve reliability, throughput, and safety across existing production C++ codebases - Identify performance bottlenecks, edge cases, and systemic issues — then implement scalable, elegant fixes - Collaborate with data, research, and engineering teams to accelerate model training and evaluation cycles - Participate in synchronous design reviews to iterate on system architecture and implementation decisions Who You Are - Native or fluent English speaker with strong written and verbal communication skills - Full-stack developer with a deep systems programming background - 5+ years of professional experience writing production-grade C++ (C++17 or C++20 preferred) - Deep understanding of computer architecture, SIMD intrinsics, and cache coherency for compute-heavy workloads - Expertise in lock-free programming and maximizing parallelism using threading libraries - Able to commit 20–40 hours per week consistently Nice to Have - Prior experience with data annotation, data quality pipelines, or evaluation systems - Familiarity with AI/ML workflows, model training, or benchmarking infrastructure - Experience building distributed systems or developer tooling Why Join Us - Work directly on production systems used by leading AI research labs — your code ships and it matters - Fully remote and async-friendly — work from wherever you do your best thinking - Flexible hours with meaningful, technically challenging work - Collaborate with world-class engineers and researchers on high-impact AI projects - Potential for ongoing engagement and expanded scope as projects scale
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