AlignerrAbout 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.
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
Interested in this role?