C++ Engineer — High Performance Computing (HPC)
About The Role
What if your mastery of C++ could directly shape the infrastructure powering the next generation of AI? We're looking for senior C++ engineers to build and optimize the high-performance systems, data pipelines, and evaluation tooling that leading AI labs depend on — working on real production code with tangible, measurable impact.
This is a fully remote, flexible contract role for engineers who know how to write fast, clean, production-grade C++ and want to do meaningful work at the frontier 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, performance, and safety across existing 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 system architecture and implementation decisions
Who You Are
Native or fluent English speaker with clear written and verbal communication skills
Full-stack developer with a strong systems programming background
5+ years of professional experience writing production C++ — preferably modern C++17 or C++20
Deep understanding of computer architecture, SIMD intrinsics, and cache coherency to optimize compute-heavy workloads
Experienced with 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 with distributed systems or developer tooling
Why Join Us
Work on cutting-edge AI infrastructure alongside leading research labs
Fully remote and flexible — work when and where it suits you
Freelance autonomy with the structure of high-impact, production-grade engineering work
Make a direct contribution to the systems that power next-generation AI models
Potential for ongoing work and contract extension as new projects launch