About The Role
What if your deep C++ expertise could directly shape the infrastructure powering the next generation of AI? We're looking for a Senior C++ Full-Stack Engineer to design, build, and optimize the systems that leading AI labs depend on — from high-performance data pipelines to annotation tooling and evaluation infrastructure.
This is a fully remote, flexible contract role for an experienced systems engineer who thrives on hard problems, cares deeply about performance and reliability, and wants 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, safety, and performance across existing C++ codebases
Identify bottlenecks and edge cases in system and data behavior — then implement scalable, production-grade fixes
Collaborate closely with data, research, and engineering teams to support model training and evaluation workflows
Participate in synchronous design reviews to iterate on 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
3–5+ years of professional experience writing production C++, with a strong command of modern standards (C++17 or C++20)
Proven expertise in performance optimization, concurrency (threading, atomics), and memory safety (RAII, smart pointers, sanitizers)
Self-directed and reliable — able to commit 20–40 hours per week and deliver consistently in a remote environment
Nice to Have
Prior experience with data annotation pipelines, data quality systems, or evaluation infrastructure
Familiarity with AI/ML workflows, model training, or benchmarking pipelines
Experience with 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 when and where it suits you
Freelance autonomy with the structure and focus of high-impact technical work
Contribute to infrastructure that shapes how next-generation AI models are built and evaluated
Potential for ongoing work and contract extension as new projects launch