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