Principal Systems Engineer; C+ AI Infrastructure

Join to apply for the Principal Systems Engineer (C++) - AI Infrastructure role at Alignerr
.

Be among the first 25 applicants.

Get AI-powered advice on this job and more exclusive features.

This range is provided by Alignerr. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.

$50.00/hr - $75.00/hr

Alignerr connects top technical experts with leading AI labs to build, evaluate, and improve next-generation models. We work on real production systems and high-impact research workflows across data, tooling, and infrastructure.

Senior C++ Full-Stack Engineer — AI Data & Infrastructure

Type:
Contract, Remote
Commitment: 20–40 hours/week
Compensation:
Competitive, hourly (based on experience)

• Design, build, and optimize high-performance systems in C++ 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 existing C++ codebases.
• Collaborate with data, research, and engineering teams to support model training and evaluation workflows.
• Identify bottlenecks and edge cases in data and system behavior, and implement scalable fixes.
• Participate in synchronous reviews to iterate on system design and implementation decisions.

• Native or fluent English speaker.
• Full-stack developer experience with a strong systems programming background.
• 5+ years of professional experience writing production C++ for large-scale systems.
• Advanced knowledge of build system architecture and package management strategies.
• Experience designing reliable systems with rigorous error handling and utilizing memory sanitizers to ensure memory safety.
• Clear written and verbal communication skills.
• Ability to commit 20–40 hours per week.

• 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.

• Submit your resume.
• Complete a short technical screening.
• Project matching and onboarding.

Mid-Senior level

Contract

Information Technology

Technology, Information and Internet

Referrals increase your chances of interviewing at Alignerr by 2x.