C++ Backend Engineer - AI Data Platforms

Alignerr is seeking a Senior C++ Engineer to design and build high-performance data pipelines and evaluation systems for advanced AI models. This role involves optimizing C++ systems that support AI data workflows and collaborating with various teams to enhance model training and evaluation processes.

Responsibilities:

• 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

Requirements:

• 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
• 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