Backend Developer - AI Data Services
Alignerr · Seattle, WA
- Hybrid
- Contract
- $80,000 / year
- Seattle, WA
Job highlights
- Build AI infrastructure with C# expertise.
- Design data pipelines and annotation tools.
- Full-stack backend development for AI labs.
- Fully remote contract role with flexibility.
- Work on production systems shaping AI.
About the role
Backend Developer - AI Data Services
About The Role
What if your C# expertise could directly shape the infrastructure powering the next generation of AI? We're looking for a senior-level full-stack engineer to design and build 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 with flexible hours. You'll work on real production systems — not toy projects — alongside data, research, and engineering teams at the forefront 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 C# systems supporting large-scale AI data pipelines and evaluation workflows
- Develop full-stack backend tooling and services for data annotation, validation, and quality control
- Improve the reliability, performance, and safety of existing C# codebases
- Collaborate with research and engineering teams to support model training and evaluation infrastructure
- Identify bottlenecks and edge cases across 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
- Experienced full-stack developer with a strong systems programming background
- 5+ years of professional experience writing production-grade C#
- Skilled in data modeling and database access using ORM frameworks or micro-ORMs for high-performance SQL interactions
- Proven experience building secure, well-documented endpoints for data access and manipulation
- Able to commit reliably to 20–40 hours per week
Nice to Have
- Prior experience with data annotation, data quality systems, or evaluation pipelines
- 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 infrastructure projects alongside leading research labs
- Fully remote and flexible — work when and where it suits you
- Freelance autonomy with the structure and substance of high-impact, meaningful work
- Make a direct, tangible contribution to the systems that shape how AI learns and improves
- Potential for ongoing work and contract extension as new projects launch
Key skills/competency
- C#
- Full-Stack Development
- Systems Programming
- Data Pipelines
- Database Access
- API Development
- Performance Optimization
- AI Data Services
- Remote Work
- Contract Role
Skills & topics
- Backend Developer
- C#
- AI
- Data Services
- Full-Stack
- Systems Programming
- Data Pipelines
- Remote
- Contract
- SQL
How to get hired
- Tailor your resume: Highlight C# full-stack, systems programming, and AI data services experience.
- Showcase C# skills: Emphasize production-grade C# development and SQL interaction with ORMs.
- Detail AI experience: Mention any work with data pipelines, annotation, or AI/ML infrastructure.
- Apply with clear communication: Ensure your application reflects strong English communication skills.
- Demonstrate availability: Confirm your ability to commit 20-40 hours per week.
Technical preparation
Master C# for backend systems.,Practice SQL with ORMs for performance.,Build secure, documented API endpoints.,Design scalable data pipelines.
Behavioral questions
Describe a complex C# system you optimized.,How do you ensure data quality in pipelines?,Explain collaboration with research teams.,How do you handle system bottlenecks?
Frequently asked questions
- What is the primary technology stack for the Backend Developer - AI Data Services role at Alignerr?
- The primary technology stack for this role is C# for backend systems, including experience with ORM frameworks for high-performance SQL interactions. The role also involves full-stack development, implying familiarity with related frontend technologies, though the core focus is backend.
- Is this a remote position for the Backend Developer - AI Data Services job at Alignerr?
- Yes, this Backend Developer - AI Data Services position at Alignerr is a fully remote contract role, offering flexible hours to candidates.
- What kind of experience is required for the Backend Developer - AI Data Services role at Alignerr?
- Alignerr requires at least 5 years of professional experience writing production-grade C#. A strong systems programming background and full-stack development experience are also essential.
- What are the expected hours for the Backend Developer - AI Data Services contract at Alignerr?
- The commitment for this contract role at Alignerr is between 20 to 40 hours per week, offering flexibility to the selected candidate.
- Does Alignerr prefer candidates with AI/ML experience for the Backend Developer role?
- While not strictly required, prior experience with data annotation, data quality systems, evaluation pipelines, AI/ML workflows, model training, or benchmarking infrastructure is considered a 'nice to have' for this Backend Developer role.
- What is the employment type for the Backend Developer - AI Data Services position at Alignerr?
- This is an hourly contract position at Alignerr, not a full-time employee role.
- How does Alignerr define 'senior-level' for this Backend Developer role?
- Alignerr defines 'senior-level' for this Backend Developer role by requiring 5+ years of professional experience writing production-grade C# and a strong systems programming background.