Senior Backend Engineer (C#) - AI Data Platform

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

Descripción de la vacante

A leading AI infrastructure firm is seeking a Senior C# Full-Stack Engineer to design and optimize systems supporting AI data pipelines. The successful candidate will work remotely, develop full-stack tools, and collaborate with varied teams. Required are 5+ years in C#, strong systems programming, and fluency in English. The position entails 20–40 hours per week, offering competitive hourly compensation based on experience, ranging from $50 to $75. Apply to contribute to innovative AI projects.

Formación

• 5+ years of experience building scalable backend services in C#.
• Strong systems programming background.
• Ability to commit 20–40 hours per week.

Responsabilidades

• Design, build, and optimize high-performance systems in C#.
• Develop full-stack tooling and backend services for data annotation.
• Collaborate with data, research, and engineering teams.

Conocimientos

Fluent English

Full-stack development

C# backend services

RESTful APIs

Cloud-native services

Clear communication

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 building scalable backend services in C#.
• Mastery of modern frameworks for building RESTful APIs and RPC services for inter-service communication.
• Experience integrating with cloud-native data services and orchestrating workflows via message bus architectures.
• 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

$50 - $75 an hour