About The Role
What if your deep C++ expertise could directly shape the infrastructure that powers the world's most advanced AI systems? We're looking for a Senior C++ Full-Stack Engineer to build and optimize the high-performance data pipelines, annotation tooling, and evaluation systems that leading AI labs depend on every day.
This is a fully remote contract role with serious technical depth — real production systems, meaningful engineering challenges, and direct collaboration with top AI research teams.
Organization: Alignerr
Type: Hourly Contract
Location: Remote
Commitment: 20–40 hours/week
What You'll Do
Design, build, and optimize high-performance C++ systems that power AI data pipelines and evaluation workflows
Develop full-stack tooling and backend services supporting 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 at scale
Identify bottlenecks and edge cases in data and system behavior — then implement scalable, production-ready fixes
Participate in synchronous design reviews to iterate on 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
Hands-on experience implementing zero-copy data exchange protocols for high-speed pipelines
Able to commit 20–40 hours per week with reliability and professionalism
Nice to Have
Prior experience with data annotation, data quality pipelines, or evaluation systems
Familiarity with AI/ML workflows, model training, or benchmarking infrastructure
Background in distributed systems or developer tooling
Why Join Us
Work directly with leading AI labs on real production systems — not toy projects
Fully remote and flexible — work from anywhere on a schedule that suits you
Freelance autonomy with the structure of meaningful, high-stakes engineering work
Make a tangible impact on the infrastructure shaping the future of AI
Potential for ongoing work and contract extension as projects scale