Backend Developer - AI Data Services

Alignerr Corp.; New York (NY); Remoto; USD 83.000 - 138.000; Part-time

Descrizione del lavoro

Alignerr is seeking a seasoned C# Backend Developer to design and optimize data pipelines, annotation tooling, and evaluation systems powering AI labs. This fully remote hourly contract role offers 20-40 hours per week and collaboration with data, research, and engineering teams at the frontier of AI development.

You will build high-performance C# systems, develop full-stack tooling for data annotation and quality control, and improve reliability across existing codebases, all while working

Competenze

• 5+ years of professional C# experience.
• Full-stack developer with strong systems programming foundation.
• Data modeling and database access with ORM/micro-ORMs for high-performance SQL.
• Experience building secure, well-documented APIs.
• Able to commit reliably to 20-40 hours per week on an ongoing basis.
• Self-directed and comfortable working asynchronously in a remote-first environment.

Mansioni

• Design, build, and optimize high-performance C# systems for 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 correctness across existing C# codebases.
• Collaborate with data, research, and engineering teams to accelerate 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.

Conoscenze

C# Experience

Data pipelines

ORM / Micro-ORM

APIs

Remote work

English communication

Descrizione del lavoro

About The Role

What if your C# expertise could directly shape the infrastructure powering next-generation AI? We're looking for a seasoned C# 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.

Backend Developer - AI Data Services

About The Role

What if your C# expertise could directly shape the infrastructure powering next-generation AI? We're looking for a seasoned C# 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 collaborate with data, research, and engineering teams at the frontier of AI development, solving hard infrastructure problems that have a direct impact on how the world's most advanced models are built.

• 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 correctness across existing C# codebases
• Collaborate closely with data, research, and engineering teams to accelerate model training and evaluation workflows
• 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 foundation and 5+ years of professional C# experience
• Skilled in data modeling and database access - including ORM frameworks and micro-ORMs for high-performance SQL interactions
• Experienced building secure, well-documented APIs and endpoints for data access and manipulation
• Able to commit reliably to 20-40 hours per week on an ongoing basis
• Self-directed and comfortable working asynchronously across a remote-first environment

Nice to Have

• Prior experience with data annotation platforms, data quality systems, or model evaluation pipelines
• Familiarity with AI/ML workflows, model training infrastructure, or benchmarking systems
• Experience with distributed systems, developer tooling, or high-throughput data processing

Why Join Us

• Work directly with leading AI research labs on production systems that matter
• Fully remote and flexible - structure your work around your schedule
• Freelance autonomy with the substance of meaningful, technically challenging work
• Contribute to infrastructure that shapes how next-generation AI models are built and evaluated
• Potential for ongoing work and contract extension as projects grow and evolve