Backend Developer - AI Data Services

Labelbox; A distancia; MXN 400,000 - 600,000; A tiempo parcial

Descripción de la vacante

A leading AI technology firm is seeking a Senior C# Full-Stack Engineer to design and optimize high-performance systems for AI data pipelines. This remote role requires 20-40 hours of commitment per week and demands strong experience in C# and full-stack development. The ideal candidate has over 5 years of professional experience, excellent communication skills, and a solid understanding of data modeling and database access. Competitive hourly compensation based on experience is offered.

Formación

• 5+ years of professional experience writing production C#.
• Experience building secure, documented endpoints for data access.
• Strong skills in data modeling and database access.

Responsabilidades

• Design, build, and optimize high-performance systems in C#.
• Develop full-stack tooling and backend services for data annotation.
• Collaborate with teams to support model training workflows.

Conocimientos

C# programming

Full-stack development

Data modeling

Database access using ORM frameworks

Clear communication skills

Experience in model training

Descripción del empleo

About the Job

Alignerr connects top technical experts with leading AI labs to build, evaluate, and improve next-generation models. We work on real production systems and high-impact research workflows across data, tooling, and infrastructure.

Position

Senior C# Full-Stack Engineer — AI Data & Infrastructure

Type: Contract, Remote | Commitment: 20–40 hours/week | Compensation: Competitive, hourly (based on experience)

Role Responsibilities

• Design, build, and optimize high-performance systems in C# supporting 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 safety across existing C# codebases
• Collaborate with data, research, and engineering teams to support model training and evaluation workflows
• Identify bottlenecks and edge cases in data and system behavior, and implement scalable fixes
• Participate in synchronous reviews to iterate on system design and implementation decisions

Qualifications

Must-Have

• Native or fluent English speaker
• Full-stack developer experience with a strong systems programming background
• 5+ years of professional experience writing production C#
• Strong skills in data modeling and database access using ORM frameworks or micro-ORMs for high-performance SQL interactions
• Experience building secure, documented endpoints for data access and manipulation
• Clear written and verbal communication skills
• Ability to commit 20–40 hours per week

Preferred

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

Application Process

• Submit your resume
• Complete a short technical screening
• Project matching and onboarding