C++ Backend Engineer - AI Data Platforms
About this role
About the Role What if your expertise in high-performance C++ could directly shape the infrastructure that powers the world's most advanced AI systems? We're looking for a senior C++ engineer to design and build the data pipelines, annotation tooling, and evaluation infrastructure that leading AI labs depend on to train and validate next-generation models. This is a fully remote, flexible contract role for an experienced systems engineer who wants to do meaningful, high-impact work at the frontier of AI development. - 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 backend services and tooling for large-scale data annotation, validation, and quality control - Improve reliability, performance, and correctness across existing C++ codebases - Identify bottlenecks and edge cases in data and system behavior, and implement scalable solutions - Collaborate closely with data, research, and engineering teams to support model training and evaluation - Participate in synchronous design reviews to iterate on system architecture and implementation decisions Who You Are - 5+ years of professional experience writing production-grade C++ - Strong background in asynchronous network programming — event loops, RPC frameworks, or high-performance microservices - Experience working with high-throughput databases or message queues - Native or fluent English speaker with clear written and verbal communication skills - Able to commit 20–40 hours per week with consistency and reliability - Self-directed and comfortable operating in fast-moving engineering environments Nice to Have - Prior experience with data annotation, data quality pipelines, or evaluation systems - Familiarity with AI/ML workflows, model training, or benchmarking infrastructure - Experience with distributed systems architecture or developer tooling - Background working alongside research teams or in AI-adjacent environments Why Join Us - Work directly with leading AI labs on production systems that matter - Fully remote — work from wherever you do your best work - Flexible hours with meaningful, high-impact engineering challenges - Contribute to the infrastructure that shapes how next-generation AI is built and evaluated - Potential for ongoing work and contract extension as projects evolve
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