Backend Developer - AI Data Services
About this role
About the Role What if your C expertise could directly shape the infrastructure powering the next generation of AI? We're looking for a Senior C Full-Stack Engineer to build and optimize the data pipelines, annotation tooling, and evaluation systems that leading AI labs depend on to train and improve their models. This is a fully remote contract role with meaningful, high-impact work — the kind where your code doesn't just sit in a backlog, it actively influences how AI systems learn and behave at scale. - 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 full-stack tooling and backend services for large-scale data annotation, validation, and quality control - Improve reliability, performance, and safety across existing C codebases used in production AI environments - Collaborate with data, research, and engineering teams to support model training and evaluation workflows - Identify bottlenecks and edge cases in data and system behavior, then implement scalable, production-ready fixes - Participate in synchronous design reviews to iterate on architecture and implementation decisions Who You Are - Native or fluent English speaker with clear written and verbal communication skills - Full-stack developer with a strong systems programming background - 5+ years of professional experience writing production-quality C - Skilled in data modeling and database access using ORM frameworks or micro-ORMs for high-performance SQL interactions - Experienced building secure, well-documented endpoints for data access and manipulation - Able to commit 20–40 hours per week consistently Nice to Have - Prior experience with data annotation, data quality pipelines, or evaluation systems - Familiarity with AI/ML workflows, model training, or benchmarking infrastructure - Experience with distributed systems or developer tooling at scale Why Join Us - Work on real production systems alongside leading AI research labs — not toy projects - Fully remote and async-friendly — work from wherever you do your best work - Freelance autonomy with the structure of meaningful, ongoing technical collaboration - Make a direct, tangible impact on how next-generation AI models are built and evaluated - Potential for ongoing work and contract extension as new projects launch
Application listings
Choose a source listing and check its country requirements.