Senior C++ Full-Stack Engineer — AI Data & Infrastructure

Alignerr is seeking a Senior C++ Full-Stack Engineer to build and optimize data pipelines and evaluation systems for advanced AI systems. This role involves collaborating with data, research, and engineering teams to support model training and evaluation workflows, while ensuring high-performance and reliability in C++ systems.

Responsibilities:

• Design, build, and optimize high-performance C++ systems supporting AI data pipelines and evaluation workflows
• Develop full-stack tooling and backend services for large-scale data annotation, validation, and quality control
• Improve reliability, performance, and safety across existing C++ codebases — from concurrency bottlenecks to memory safety issues
• Collaborate closely with data, research, and engineering teams to support model training and evaluation workflows
• Identify edge cases and systemic bottlenecks in data and system behavior, then implement scalable, production-ready fixes
• Participate in synchronous design reviews to iterate on architecture and implementation decisions

Requirements:

• Full-stack developer with a strong systems programming foundation and a bias for clean, performant code
• 3–5+ years of professional experience writing production C++, with fluency in modern standards (C++17 or C++20)
• Deep understanding of systems programming fundamentals — performance optimization, concurrency (threading, atomics), and memory safety (RAII, smart pointers, sanitizers)
• Native or fluent English speaker with clear written and verbal communication skills
• Self-directed and reliable with the ability to commit 20–40 hours per week
• Prior experience with data annotation, data quality systems, or evaluation pipelines
• Familiarity with AI/ML workflows, model training, or benchmarking infrastructure
• Experience with distributed systems or developer tooling at scale