Lead Python Engineer, AI Data & ML Infra (Remote)

Alignerr Corp.; Sydney; Remote; AUD 165,000 - 248,000; Part time

Job summary

Alignerr Corp. in Sydney seeks a Principal Python Engineer to design and build data pipelines, annotation tooling, and evaluation systems for producing scalable AI infrastructure. This fully remote, hourly contract role targets a senior engineer who thrives in high-performance environments.

You will own critical Python components, optimize performance, and collaborate with cross-functional teams to support model training and evaluation workflows. Remote, flexible, 20–40 hours per week.

Qualifications

• 5+ years of professional experience writing production Python for large-scale infrastructure or platform engineering.
• Strong experience designing distributed systems and managing concurrency with advanced asynchronous patterns.
• Intimately familiar with Python internals and performance optimization for compute-heavy workloads.
• Able to drive technical strategy and architectural decisions clearly and confidently.
• Excellent written and verbal English communication skills.

Responsibilities

• Design, build, and optimize high-performance Python systems powering 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 production Python codebases.
• Identify bottlenecks and edge cases in data and system behavior and implement scalable fixes.
• Collaborate with data, research, and engineering teams to support model training and evaluation workflows.
• Lead architectural and system design decisions through synchronous technical reviews.

Skills

Python

Distributed systems

Async programming

Performance optimization

Full-stack development

Tools

Annotation tooling

Backend services

Distributed computing frameworks

Job description

Alignerr Corp. in Sydney seeks a Principal Python Engineer to design and build data pipelines, annotation tooling, and evaluation systems for producing scalable AI infrastructure. This fully remote, hourly contract role targets a senior engineer who thrives in high-performance environments.

You will own critical Python components, optimize performance, and collaborate with cross-functional teams to support model training and evaluation workflows. Remote, flexible, 20–40 hours per week.