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Labelbox

Principal Python Engineer - ML Infrastructure

Labelbox, Seattle, Washington, us, 98127

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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 Python 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

Python

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 Python 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 Python, specifically for large‑scale infrastructure or platform engineering

Expertise in designing distributed computing systems and managing concurrency with advanced asynchronous patterns

Deep understanding of Python internals (GIL limitations, memory profiling) and experience optimizing performance for compute‑heavy workloads

Clear written and verbal communication skills for driving technical strategy and architectural decisions

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

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