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Senior C++ Full-Stack Engineer — AI Data & Infrastructure
Remote (Global)
$50 – $75/hr
June 26, 2026
Job description
Senior C++ Full-Stack Engineer — AI Data & Infrastructure
About the Role
What if your systems programming expertise could directly shape the infrastructure powering the world's most advanced AI models? We're looking for Senior C++ Engineers to design and build the high-performance data pipelines, annotation tooling, and evaluation systems that leading AI labs depend on to train and improve next-generation AI.
This is a fully remote, flexible contract role for engineers who write clean, fast, production-grade C++ and want to work on problems that genuinely matter.
- 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 large-scale AI data pipelines and evaluation workflows
- Develop full-stack tooling and backend services for data annotation, validation, and quality control
- Improve reliability, performance, and memory safety across existing production C++ codebases
- Identify bottlenecks and edge cases in system and data behavior — then implement scalable, production-ready fixes
- Collaborate with data, research, and engineering teams to accelerate model training and evaluation
- Participate in synchronous design reviews to iterate on architecture and implementation decisions
Who You Are
- Full-stack developer with a strong systems programming background
- 3–5+ years of professional experience writing production C++, with a focus on modern standards (C++17 or C++20)
- Deep familiarity with performance optimization, concurrency (threading, atomics), and memory safety (RAII, smart pointers, sanitizers)
- Native or fluent English speaker with clear written and verbal communication skills
- Able to commit 20–40 hours per week with professional reliability
- Self-directed and effective when working independently in a remote environment
Nice to Have
- 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
- Exposure to working with research teams or in fast-moving technical environments
Why Join Us
- Work directly with leading AI labs on production systems that power cutting-edge research
- Fully remote and flexible — work when and where you're most productive
- Freelance autonomy with the substance of meaningful, high-impact engineering work
- Tackle genuinely hard technical problems with real consequences for AI development
- Potential for ongoing work and contract extension as new projects launch
Apply now
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About Vercel: Vercel is the agentic infrastructure company. We free people and agents to ship what’s next. For more than a decade, Vercel has shaped how the web is built.
About Vercel: Vercel is the agentic infrastructure company. We free people and agents to ship what’s next. For more than a decade, Vercel has shaped how the web is built.
AI Engineer (Contract) Please note that this is a contract role providing services to Microsoft through external staffing partners of Allegis Global Solutions. If you are selected for this role, you will be employed by AGS and will not be an employee of Microsoft.