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