Data Infrastructure Developer (C++)

About The Role

What if your systems programming expertise could directly shape the infrastructure powering the world's most advanced AI models? We're looking for a Senior C++ Engineer to design and build the high-performance data pipelines, annotation tooling, and evaluation systems that leading AI labs depend on — from the ground up.

This is a fully remote, flexible contract role for engineers who thrive on hard technical problems and want their work to matter at scale.

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
• 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, production-ready fixes
• 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
• 3–5+ years of professional experience writing production-grade C++
• Deep expertise in efficient binary serialization formats
• Experienced implementing zero-copy data exchange protocols for high-speed pipelines
• Self-directed and able to commit 20–40 hours per week in a remote environment

Nice to Have

• 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

Why Join Us

• Work on real production systems at the frontier of AI — not toy projects
• Collaborate directly with leading AI research labs on high-impact infrastructure
• Fully remote and flexible — work when and where you do your best work
• Freelance autonomy with the substance of meaningful, technically demanding work
• Potential for ongoing work and contract extension as new projects launch