C++ Backend Engineer - AI Data Platforms
C++ Backend Engineer — AI Data Platforms 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 to train and improve next-generation models. This is a fully remote, flexible contract role for a seasoned C++ engineer who thrives on performance-critical systems and wants their work to have real, lasting impact on the AI landscape. 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 model evaluation workflows Develop backend services and full-stack tooling supporting large-scale data annotation, validation, and quality control Improve reliability, safety, and throughput across existing production C++ codebases Identify and resolve bottlenecks, edge cases, and failure modes in complex distributed systems Collaborate closely with data, research, and engineering teams to accelerate model training and evaluation Participate in synchronous design reviews and contribute to architectural decisions that shape the platform Who You Are Native or fluent English speaker with clear written and verbal communication skills 5+ years of professional experience writing production-grade C++ Strong background in asynchronous network programming — event loops, RPC frameworks, and high-performance microservices Experienced with high-throughput databases or message queues Full-stack developer mindset with a deep systems programming foundation Able to commit 20–40 hours per week with consistency and reliability
Nice to Have
Prior experience with data annotation platforms, data quality systems, or model evaluation infrastructure Familiarity with AI/ML workflows, model training pipelines, or benchmarking systems Experience with distributed systems architecture or internal developer tooling
Why Join Us
Work on real production systems for leading AI research labs — not toy projects Fully remote and async-friendly — work from wherever you do your best work Flexible contract hours that fit around your life and other commitments Contribute to infrastructure that directly shapes how the next generation of AI models is built and evaluated Potential for ongoing work and contract extension as projects grow and evolve