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CirrusLabs

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Python Backend Engineer

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Summary

CirrusLabs is hiring a Python Backend Engineer in Toronto to design and build microservices-based backends using Python/FastAPI, Snowflake, and SQL databases, secured with JWT/OAuth2 and deployed via Docker on cloud platforms. 5-7 years of experience is expected, with fintech/payments experience valued.

Technical Skills

• Experience designing and implementing microservices architectures, including service discovery, inter-service communication, API versioning, and distributed tracing/logging for observability.

• Proficiency in Python for backend development, including FastAPI async patterns, and Pydantic-based data validation.

• Hands-on experience with SQL and analytical databases for writing optimized queries, aggregations, and data transformations.

• Experience developing Snowflake-native applications: stored procedures (JavaScript/Python), Tasks, Streams, Dynamic Tables, and Snowpark for building backend processing engines.

• Understanding of REST API design, OpenAPI specifications, and API integration patterns in frontend applications.

• Knowledge of authentication and authorization patterns including JWT, OAuth2, and role-based access control.

• Experience with Docker and Docker Compose for local development and containerized deployments.

• Familiarity with CI/CD pipelines for automated testing and deployment.

• Experience with version control using Git, including branching strategies and code review workflows.

• Ability to work with cloud platforms (AWS, Azure, or GCP) for data storage, compute, and deployment.


Qualifications and Skills

• Bachelor’s degree (Master’s preferred) in Computer Science, Software Engineering, Information Systems, or a related discipline.

• 5-7 years of professional full stack development experience, with demonstrated delivery of production-grade web applications.

• Experience in the Payments or Fintech industry would be a strong asset.

• Proven ability to work independently, manage multiple concurrent workstreams, and deliver with minimal oversight.

• Excellent communication and interpersonal skills, with the ability to engage both technical and non-technical audiences.

• Unquestionable personal and business ethics and integrity

Skills

See also

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