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Alignerr · 3 weeks ago

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

United States

Contract

Remote

Mid, Senior Level

$50/hr - $75/hr

3+ years exp

Alignerr connects top technical experts with leading AI labs to build, evaluate, and improve next-generation models. The Senior C++ Full-Stack Engineer will design, build, and optimize high-performance systems in C++ supporting AI data pipelines and evaluation workflows, as well as develop full-stack tooling and backend services for large-scale data annotation and quality control.

Computer Software

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

Qualification

C++Full-stack developmentPerformance optimizationConcurrencyMemory safetyAI/ML workflowsData annotation experienceDistributed systemsClear communication

Required

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