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Python Software Foundation

Software Engineer – Platform & SystemsCrossTerra

Python Software Foundation, San Francisco

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NEW Software Engineer – Platform & Systems at CrossTerra

Join us to apply for the NEW Software Engineer – Platform & Systems role at CrossTerra .

About the Role: CrossTerra is building infrastructure to enable seamless cross-border commerce, including fulfillment, localization, payments, and marketplace integrations. Our stack includes APIs, Lambdas, multi-tenant frontends, and cloud-native infrastructure. We are looking for a senior engineer to help us scale effectively.

Responsibilities include:

  • Implementing standards across Python Lambdas, TypeScript frontends, Terraform modules, and container infrastructure.
  • Refactoring complex logic into clean, maintainable interfaces.
  • Owning key workflows such as CI/CD pipelines, observability, dev containers, and local development tooling.
  • Contributing to new services, including event-driven Lambdas and APIs for logistics, customs, payments, and catalog sync.
  • Leveraging AI tools like Cursor, Codex, ChatGPT to accelerate development and maintain quality.
  • Collaborating with cross-functional teams to deliver robust features on schedule.
  • Writing scalable documentation, from README guides to design notes.

Our Tech Stack includes:

  • APIs & Lambdas: Python 3.11 (FastAPI, SQLAlchemy, AWS Lambda, EventBridge, Poetry)
  • Frontends: Next.js, Tailwind, Ant Design
  • Infrastructure: Terraform, ECS/Fargate, Docker, RDS, S3, EKS
  • Tools: DevContainers, GitHub Actions
  • Data: PostgreSQL, Elasticsearch, Shopify, DeepL
  • Observability: OpenTelemetry, CloudWatch, Grafana

Requirements:

  • 7+ years in backend systems and infrastructure development.
  • Proficiency in Python and TypeScript, with experience in cloud-native environments.
  • Experience shipping features with minimal debt and understanding of system boundaries.
  • Ability to utilize AI tools effectively to speed up development.
  • Clear communication skills in PRs, documentation, and Slack.

Preferred:

  • Experience with commerce, logistics, or marketplace platforms.
  • Familiarity with Alibaba Cloud, DevOps pipelines, or deployments in China.
  • Contributions to open source or shared tooling.
  • Experience supporting multi-market, multi-language, or multi-tenant systems.

About CrossTerra: We are an early-stage company building infrastructure for global commerce, focusing on localization, fulfillment, and payments to facilitate cross-border growth seamlessly.

Why Join Us: Be a key contributor to scaling our platform, with leadership support and autonomy to make a significant impact.

Contact: Winton Welsh, , Website

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