C++ Backend Engineer - AI Data Platforms
About this role
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
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