C++ Developer - Internal Tooling & Optimization

Alignerr; Seattle (WA); Remote; USD 83,000 - 131,000; Part time

Benefits offered by this job

Fully remote contract

Flexible schedule

20–40 hours/week

Job summary

Alignerr is seeking an experienced C++ developer for internal tooling and optimization to support AI training workflows. The role is a fully remote, hourly contract with a commitment of 20–40 hours per week, enabling contribution to high-performance data pipelines and tooling.

You will work alongside AI researchers to shape production-grade C++ solutions that accelerate model training and evaluation. Ideal candidates have 3–5+ years of production C++ experience, strong systems programming

Qualifications

• 3–5+ years of production-grade C++ experience.
• Fluent English communication skills, written and verbal.

Responsibilities

• Design, build, and optimize high-performance C++ systems for AI data pipelines and evaluation workflows.
• Develop backend services and tooling for data annotation, validation, and quality control.
• Improve reliability, performance, and safety across existing C++ codebases.
• Profile and benchmark code to identify bottlenecks and implement scalable solutions.
• Embed scripting languages within C++ applications to create flexible internal tools.
• Collaborate with data, research, and engineering teams to accelerate model training and evaluation.

Skills

C++

Systems programming

Profiling

Scripting embedding

Full-stack tooling

Job description

C++ Developer — Internal Tooling & Optimization (AI Training)

About The Role

What if your C++ expertise could directly shape the infrastructure behind the most advanced AI systems in the world? We're looking for experienced C++ engineers to design, build, and optimize the internal tooling and data pipelines that power next-generation AI research and production workflows.

This is a fully remote, flexible contract role for engineers who thrive at the intersection of systems performance, data infrastructure, and high-impact technical work. You'll be embedded in real engineering workflows alongside leading AI labs — writing code that matters.

• Organization: Alignerr
• Type: Hourly Contract
• Location: Remote
• Commitment: 20–40 hours/week

What You'll Do

• Design, build, and optimize high-performance C++ systems supporting AI data pipelines and evaluation workflows
• Develop backend services and full-stack tooling for large-scale data annotation, validation, and quality control
• Improve reliability, performance, and safety across existing production C++ codebases
• Profile and benchmark code to identify bottlenecks in data processing systems and implement scalable solutionsEmbed scripting languages within C++ applications to create flexible, extensible internal tools
• Collaborate with data, research, and engineering teams to accelerate model training and evaluation
• Participate in synchronous design reviews to iterate on system architecture and implementation decisions

Who You Are

• 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-grade C++
• Experienced in embedding scripting languages within C++ applications for flexible tooling
• Skilled at profiling code and identifying performance bottlenecks in data-intensive systems
• Able to commit 20–40 hours per week consistently
• Self-directed and reliable when working in a remote, asynchronous environment

Nice to Have

• Prior experience with data annotation, data quality, or AI evaluation systems
• Familiarity with AI/ML workflows, model training pipelines, or benchmarking infrastructure
• Experience with distributed systems or developer tooling at scale
• Background in systems design for high-throughput or low-latency environments

Why Join Us

• Work on real production systems alongside top AI research labs — not toy projects
• Fully remote and flexible — structure your work around your life
• Freelance autonomy with the substance of high-impact, technically demanding work
• Contribute directly to infrastructure that shapes the future of AI development
• Potential for ongoing contracts and expanded scope as new projects launch