Senior Software Engineer (Python/Go, Infrastructure)

Location - Hybrid

About Us

The Role:

Responsibilities

• Design, build and operate backend services for authentication, authorisation and account management.
• Model multi-tenant account structures — organisations, teams, membership and roles — and keep the model correct as the product grows.
• Design and evolve public and internal APIs, including versioning and backward compatibility.
• Integrate enterprise identity: single sign-on over SAML and OIDC, and provisioning over SCIM.
• Build event-driven integrations over Kafka, including schema design and compatibility.
• Keep services available and fast on the request path, across several regions.
• Own what you build in production: metrics, tracing, alerting, and on-call for your own services.

Requirements

• Languages and frameworks:
• Python 3.12+ — Expert
• Go 1.23+ — Intermediate
• FastAPI — Advanced
• Django and Django REST Framework — Advanced
• Datastores:
• MongoDB — Intermediate — document modelling, indexing, schema migrations, and the trade-offs of denormalisation
• MySQL — Intermediate — schema migrations, transactions, reasoning about query cost
• Redis — basics
• LDAP / directory services — basics
• Messaging and API contracts:
• Kafka — basics— consumer groups, partitioning and ordering, idempotent consumption, retries and dead-letter handling
• REST and OpenAPI — Intermediate
• Identity and access:
• Multi-tenancy modelling — Advanced — organisations, teams, membership and roles; the difference between a hierarchy and a relation, and the consequences of each
• Token-based authentication, JWT — Advanced — issuing, validating, claims design, expiry and revocation
• OIDC — Advanced
• SAML — Advanced
• Session management — Advanced — where a session lives, how it is inspected and revoked
• Role-based and attribute-based access control — Advanced
• SCIM provisioning — Familiarity
• Infrastructure and delivery:
• Docker — Intermediate
• Kubernetes — Advanced — deploying, inspecting and debugging a service
• Helm — Intermediate
• CI/CD pipelines (GitLab CI or equivalent) — Intermediate
• Observability:
• OpenTelemetry and distributed tracing — Advanced
• Prometheus and PromQL — Advanced — diagnosing from metrics, not only reading dashboards
• Grafana — Advanced
• Log querying at scale — Advanced
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• At Sauce, we will commit to supporting the health and safety of employees and properties, partnering with internal stakeholders to learn and act on ever-evolving security protocols and procedures. You’ll be expected to fully comply with all policies and procedures related to security at the department and org wide level and exercise a ‘security first’ approach to how we design, build & run our products and services.