Data Platform Engineer (Python)
About this role
About the Role What if your Python expertise could directly shape the infrastructure powering next-generation AI? We're looking for a Senior Python 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 working on real production systems — not toy projects. You'll be embedded alongside data, research, and engineering teams doing meaningful, high-visibility work 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 Python systems supporting large-scale AI data pipelines and evaluation workflows - Develop full-stack tooling and backend services for data annotation, validation, and quality control - Identify and fix bottlenecks, edge cases, and reliability issues across production Python codebases - Collaborate directly with data, research, and engineering teams to support model training and benchmarking - Participate in synchronous design reviews to iterate on architecture and implementation decisions - Improve performance, safety, and scalability across existing infrastructure Who You Are - Native or fluent English speaker with clear written and verbal communication skills - 5+ years of professional experience writing production-grade Python for data engineering - Strong full-stack developer background with solid systems programming fundamentals - Proficient with workflow orchestration tools for managing complex dependency graphs - Experienced with dataframe processing libraries and cloud data warehouse SDKs - Able to commit reliably to 20–40 hours per week 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 Why Join Us - Work on cutting-edge AI projects alongside leading research labs at the frontier of the field - Fully remote and flexible — work from wherever you do your best thinking - Freelance autonomy with the structure and consistency of meaningful, ongoing technical work - Make a direct, tangible impact on the systems that shape how AI models learn and improve - Potential for extended engagement and expanded scope as projects evolve
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