C++ Backend Engineer - AI Data Platforms

C++ Backend Engineer — AI Data Platforms

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