Lead Systems Engineer (Rust) - AI Platform

Labelbox; Remote; GBP 100,000 - 125,000; Part time

Job summary

An innovative AI infrastructure company is seeking a Senior Rust Full-Stack Engineer to design and develop high-performance systems supporting AI data pipelines. The role requires 5+ years of Rust experience, focusing on system architecture and API design. Responsibilities include building full-stack tools for data validation and collaborating with cross-functional teams. This contract position offers flexible hours (20-40/week) and competitive hourly rates ranging from $50 to $75, based on experience.

Qualifications

• 5+ years of professional experience writing production Rust.
• Deep expertise in FFI and unsafe Rust boundaries.
• Excellent written and verbal communication skills.

Responsibilities

• Design and optimize high-performance systems in Rust.
• Develop full-stack tooling and backend services.
• Collaborate with teams to support model training.

Skills

Fluent English

Rust programming

System architecture

API design

Asynchronous runtimes

Thread safety in multi-threaded environments

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)

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, with a focus on system architecture and API design.
• Deep expertise in FFI (Foreign Function Interface) and unsafe Rust boundaries to optimize interactions between Rust and other languages.
• Advanced knowledge of asynchronous runtimes and ensuring thread safety in complex, multi-threaded environments.
• Clear written and verbal communication skills for leading system design reviews.
• 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