Backend Developer - AI Data Services
About this role
About the Role What if your C expertise could directly shape the infrastructure powering next-generation 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 every day. This is a fully remote contract role with meaningful, high-impact work. You won't be maintaining legacy CRUD apps — you'll be solving real engineering problems 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 model evaluation workflows - Develop full-stack tooling and backend services for large-scale data annotation, validation, and quality control - Improve reliability, performance, and safety across production C codebases - Collaborate with data, research, and engineering teams to support model training and evaluation infrastructure - 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-grade C - Experienced in data modeling and database access using ORM frameworks or micro-ORMs for high-performance SQL interactions - Proven ability to build 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 researchers and engineers at leading AI labs - Fully remote and async-friendly — work from wherever you do your best work - Freelance autonomy with the structure and consistency of ongoing, meaningful project work - Gain direct exposure to cutting-edge AI development at the infrastructure level - Potential for extended engagement as projects evolve and new workstreams launch
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