Location: San Francisco/Milpitas, CA
We're growing our backend engineering team and looking for a Senior Python Developer to help design and build core services for a data-intensive SaaS platform. You'll work on business logic services, third-party integrations, and data pipelines that power our product.
< dir="ltr">Responsibilities</>Design and build backend services and APIs using Python and FastAPI (or similar frameworks)
Build and maintain integrations with third-party platforms via REST APIs, webhooks, and OAuth
Design and maintain PostgreSQL schemas, with attention to data integrity, precision, and auditability
Build and maintain scheduled/batch processing pipelines (e.g., Celery) for recurring data processing jobs
Collaborate with data science/ML engineers on services that consume or serve model outputs via API
Write thorough unit and integration tests for core business logic
Participate in architecture decisions, code reviews, and on-call rotation
Work closely with frontend engineers to design clean, well-documented APIs
5+ years professional experience with Python, including strong proficiency with FastAPI
Strong experience with PostgreSQL, including schema design, indexing, and query optimization
Comfort with precise numeric handling in contexts where accuracy and correctness are critical
Experience with task queues/schedulers (Celery, APScheduler, or similar) for batch/async processing
Experience integrating with third-party REST/SOAP APIs (webhooks, OAuth, retries, idempotency patterns)
Solid understanding of software testing practices, especially for business-rule-heavy systems
Strong written communication skills
Experience with systems requiring high data integrity or auditability (e.g., regulated industries, financial or compliance-adjacent systems)
Experience with enterprise system integrations (ERP, CRM, or similar platforms)
Familiarity with pandas, scikit-learn, or forecasting/ML libraries
Experience with event-driven architectures (Kafka, RabbitMQ, SQS)
Experience with gRPC/Protobuf or other strongly-typed service contracts
Prior experience in fintech or other audit-adjacent domai
