C++ Engineer - High Performance Computing (HPC)

C++ Engineer — High Performance Computing (HPC) for AI
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

Work arrangement
Yes