Backend Developer - AI Data Services
Alignerr · New York, NY
- Hybrid
- Contract
- $85,000 / year
- New York, NY
Job highlights
- Build AI data infrastructure with C#.
- Optimize data pipelines and model evaluation systems.
- Develop tools for data annotation and quality.
- Work remotely on production AI systems.
- Collaborate with leading AI research teams.
About the role
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
Key skills/competency
- C#
- Backend Development
- AI Data Services
- Data Pipelines
- Model Evaluation
- API Development
- Database Management
- Systems Programming
- Remote Work
- Full-Stack Development
Skills & topics
- C#
- Backend Developer
- AI
- Data Services
- Data Pipelines
- Model Evaluation
- Remote
- Contract
- Systems Programming
- API Development
How to get hired
- Tailor your resume: Highlight your 5+ years of C# experience and full-stack skills, emphasizing AI data services, pipelines, and model evaluation.
- Showcase system programming: Detail your experience with secure APIs, database access, and optimizing performance in production environments.
- Emphasize remote readiness: Mention your experience with asynchronous work and a remote-first culture.
- Prepare for technical questions: Be ready to discuss C# system design, data modeling, and performance optimization.
- Demonstrate collaboration: Provide examples of working effectively with cross-functional teams on complex projects.
Technical preparation
Practice C# coding challenges.,Build a sample data pipeline.,Design secure API endpoints.,Optimize SQL queries and ORMs.
Behavioral questions
Describe a complex system you designed.,How do you handle asynchronous collaboration?,Share an experience improving system performance.,How do you identify and fix bottlenecks?
Frequently asked questions
- What is the work arrangement for the Backend Developer - AI Data Services role at Alignerr?
- This is a fully remote contract role, offering flexibility in your work schedule. You can structure your work around your life, committing 20-40 hours per week on an ongoing basis.
- What are the primary responsibilities of a Backend Developer - AI Data Services at Alignerr?
- As a Backend Developer - AI Data Services at Alignerr, you will design, build, and optimize C# systems for AI data pipelines and model evaluation. This includes developing full-stack tooling for data annotation, validation, and quality control, while improving existing C# codebases.
- What programming languages and technologies are essential for this role?
- The primary technology for this role is C#. A strong foundation in systems programming, data modeling, database access (including ORM frameworks), and secure API development is essential. Experience with distributed systems and high-throughput data processing is a plus.
- What experience level is required for the Backend Developer - AI Data Services position?
- The ideal candidate is a full-stack developer with a strong systems programming foundation and at least 5 years of professional C# experience. Native or fluent English communication is also required.
- Does Alignerr offer opportunities for long-term engagement with this role?
- Yes, Alignerr indicates potential for ongoing work and contract extension. As projects evolve and grow, there may be opportunities for continued engagement beyond the initial contract period.
- How does Alignerr support remote work for this role?
- Alignerr is a remote-first company. This role is fully remote, and candidates are expected to be self-directed and comfortable working asynchronously. Clear written and verbal communication in English is a key requirement.
- What kind of projects can I expect to work on as a Backend Developer - AI Data Services?
- You will work on real production systems that support leading AI research labs. This involves building and optimizing the infrastructure for training and evaluating AI models, focusing on data pipelines, annotation tools, and quality control systems.