C# Infrastructure Engineer - Data Pipelines
About this role
About the Role What if your C engineering skills could directly shape the infrastructure powering the world's most advanced AI systems? We're looking for a senior C engineer to design and build the high-performance data pipelines, annotation tooling, and evaluation infrastructure that leading AI labs depend on to train and improve next-generation models. This is a fully remote, flexible contract role for an experienced engineer who wants meaningful, high-impact work — without the overhead of a full-time commitment. - 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 existing C codebases - Identify bottlenecks and edge cases in data and system behavior, then implement scalable, resilient fixes - Collaborate with data, research, and engineering teams to support model training and evaluation workflows - 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 - Full-stack developer with a strong systems programming background - 5+ years of professional experience writing production-grade C - Deep experience building streaming data pipelines using asynchronous streams and reactive programming concepts - Skilled at optimizing I/O-bound operations and implementing resilient retry policies for distributed data ingestion - Able to commit 20–40 hours per week with reliable availability Nice to Have - Prior experience with data annotation, data quality, or AI evaluation systems - Familiarity with AI/ML workflows, model training, or benchmarking pipelines - Experience with distributed systems architecture or developer tooling Why Join Us - Work directly on production systems used by leading AI research labs - Fully remote and flexible — structure your hours around your life - Freelance autonomy with the depth and consistency of real, ongoing engineering work - Make a tangible impact on the infrastructure shaping the future of AI - Potential for ongoing work and contract extension as projects scale
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