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

Remote
Alignerr San Francisco, CA $50 - $75
Contract Senior Level 3+ years

Posted 2 weeks ago

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About This Role

This role involves designing, building, and optimizing high-performance C++ systems for AI data pipelines and evaluation workflows. The engineer will also develop full-stack tooling for large-scale data annotation and collaborate with cross-functional teams to improve AI model training and evaluation.

Responsibilities

  • Design, build, and optimize high-performance systems in C++ 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
  • Collaborate with data, research, and engineering teams to support model training and evaluation workflows
  • Identify bottlenecks and edge cases in data and system behavior, and implement scalable fixes
  • Participate in synchronous reviews to iterate on system design and implementation decisions

Requirements

  • Native or fluent English speaker
  • Full-stack developer experience with a strong systems programming background
  • 3-5+ years of professional experience writing production C++ (with a focus on modern standards like C++17 or C++20)
  • Strong systems programming background in performance optimization, concurrency (e.g., threading, atomics), and memory safety (e.g., RAII, smart pointers, sanitizers)
  • Clear written and verbal communication skills
  • Ability to commit 20–40 hours per week

Qualifications

  • 3-5+ years of professional experience writing production C++

Nice to Have

  • Prior experience with data annotation, data quality, or evaluation systems
  • Familiarity with AI/ML workflows, model training, or benchmarking pipelines
  • Experience with distributed systems or developer tooling

Skills

AI * C++ * ML * Threading * C++17 * C++20 * atomics * RAII * smart pointers * sanitizers *

* Required skills

About Alignerr

Alignerr partners with the world’s leading AI research teams and labs to build and train cutting-edge AI models.

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