C++ Developer - Internal Tooling & Optimization
About this role
About the Role What if your C++ skills could directly shape the infrastructure powering the world's most advanced AI systems? We're looking for a Senior C++ Full-Stack Engineer to design, build, and optimize the high-performance tooling and data pipelines that leading AI labs depend on — from annotation systems to evaluation infrastructure. This is a fully remote, flexible contract role for experienced systems engineers who want meaningful, high-impact work on real production systems. - 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 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 - Identify bottlenecks and edge cases in data and system behavior, and implement scalable fixes - Embed scripting languages within C++ applications to create flexible, extensible tooling - 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 - 3–5+ years of professional experience writing production-grade C++ - Strong full-stack developer with a solid systems programming foundation - Experienced profiling and optimizing code to eliminate bottlenecks in data processing pipelines - Skilled at embedding scripting languages within C++ applications - Native or fluent English speaker with clear written and verbal communication skills - Able to commit 20–40 hours per week with consistency and reliability 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 - Background working alongside research or data science teams Why Join Us - Work on cutting-edge AI infrastructure projects alongside leading research labs - Fully remote and flexible — work when and where it suits you - Freelance autonomy with the structure of meaningful, high-impact engineering work - Contribute directly to systems that shape how next-generation AI models are built and evaluated - Potential for ongoing work and contract extension as new projects launch
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