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

Alignerr is seeking a Senior C++ Full-Stack Engineer to design, build, and optimize systems that support AI data pipelines and evaluation workflows. The role involves improving performance and reliability of C++ codebases and collaborating with various teams to enhance model training and evaluation processes.

Responsibilities:

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

Requirements:

• Native or fluent English speaker with strong written and verbal communication skills
• Full-stack developer with a deep systems programming background
• 3–5+ years of professional experience writing production C++, with a strong command of modern standards (C++17 or C++20)
• Proven expertise in performance optimization, concurrency (threading, atomics), and memory safety (RAII, smart pointers, sanitizers)
• Self-directed and reliable — able to commit 20–40 hours per week and deliver consistently in a remote environment
• Prior experience with data annotation pipelines, data quality systems, or evaluation infrastructure
• Familiarity with AI/ML workflows, model training, or benchmarking pipelines
• Experience with distributed systems or developer tooling