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 real technical depth — you'll work on production systems that matter, alongside data, research, and engineering teams at the frontier of AI development. - 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 - 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 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-grade C - Strong skills 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 with reliability and consistency 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 Why Join Us - Work directly with leading AI labs on real production infrastructure — not toy projects - Fully remote and async-friendly — work from wherever you do your best thinking - Freelance autonomy with the structure of meaningful, ongoing technical work - Contribute to systems that have a measurable impact on how next-generation AI is built and evaluated - Potential for extended engagement as new projects and infrastructure needs grow
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