Backend & Tooling Engineer (Rust)

Labelbox; Remote; GBP 80,000 - 100,000; Part time

Job summary

A leading AI solutions provider is seeking a Senior Rust Full-Stack Engineer to design and optimize systems for AI data pipelines. The role is remote, committing 20-40 hours per week, and requires over 5 years of Rust experience. Candidates must have a strong proficiency in backend web services and CLI tools. Ideal candidates will have experience in data annotation, AI workflows, and distributed systems. Competitive hourly compensation is offered based on experience.

Qualifications

• 5+ years of professional experience writing production Rust.
• Proficiency in building high-performance backend web services.
• Experience with type-safe database interactions and connection pooling.

Responsibilities

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

Skills

Native or fluent English speaker

Production Rust experience (5+ years)

High-performance backend web services

User-friendly command-line interface (CLI) tools

Job description

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 Rust Full-Stack Engineer — AI Data & Infrastructure

Type: Contract, Remote | Commitment: 20–40 hours/week | Compensation: Competitive, hourly (based on experience) | $50 - $75 an hour

Role Responsibilities

• Design, build, and optimize high-performance systems in Rust 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 Rust 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
• 5+ years of professional experience writing production Rust
• Proficiency building high-performance backend web services and robust, user-friendly command-line interface (CLI) tools
• Experience with type-safe database interactions and connection pooling for handling large-scale data
• 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