Staff/Senior Python Engineer

We are looking for a Senior/Staff Backend Engineer to own the core services at the heart of the platform — the data-intensive computation layer that turns curated financial and operational data into correct, reproducible, fully traceable results. This is the structured engineering beneath the product: not dashboards, not an LLM wrapper, but the services that do the heavy computation and stand behind every number the platform produces.You would be responsible for building reusable, configuration-driven computation components, enforcing strong controls and guardrails over automated output, and guaranteeing every result can be reproduced and audited. You provide technical leadership for the backend team and partner with data, AI, and product to translate domain logic into robust, reusable services.Essential functionsCore Computation Services (35%)Own the services that perform the platform's core financial and operational computationBuild a composable library of reusable computation components driven by configurationProduce results that are fully traceable to their source inputsCompute the supporting quality and confidence signals around each resultComputation & Correctness (20%)Express complex logic as correct, performant, set-based computation over the warehouseGuarantee results reconcile and are reproducibleOwn performance and cost of the core servicesConfiguration Runtime (15%)Build the runtime that executes per-domain configurationAdd new domains and use cases through configuration — never a bespoke code pathKeep the component library extensibleControls & Auditability (15%)Enforce guardrails over automated output in codeBuild the controls / feature-flag system to scope or disable automated behavior per tenant or featureBuild audit logging and lineage for end-to-end traceability to sourceMulti-Cloud & Multi-Tenant (10%)Build for a multi-cloud-ready, multi-tenant-ready, customer-hosted deployment modelServices that run inside a customer's environment with strong isolation and no egressTechnical Leadership (5%)Set patterns, review designs, and mentor the backend teamPartner with data, AI, and product on service designQualificationsLanguages & ServicesPythonProduction service design & testingConfig-driven / rules-engine architecturesData & ComputeSQL (window functions, large joins)Snowflake / PostgreSQLSet-based, reproducible computationPlatformDocker / Kubernetes / TerraformMulti-tenant, customer-hosted deploymentAudit logging & lineageRequired QualificationsCore8+ years backend engineering (Python / Go / Java or similar), with significant Staff+ time owning complex, data-intensive systems.An passion for correctness, traceability, and testability — "every result is explainable and reproducible" as a requirement.Bachelor’s degree in Computer Science, Business, Engineering, or a related field.Technical DepthElite SQL and data modeling — window functions, large-scale joins, and rigorous reasoning about correctness and performance.Experience designing configuration-driven, extensible service architectures.Strong system design for reliability, isolation, and reproducibility.Would be a plusFinance / accounting / analytics domain, or genuine willingness to learn how financial statements are built and reconciled.dbt, Snowflake / PostgreSQL; multi-tenant, customer-hosted deployment; Docker / Kubernetes / Terraform.Exposure to ML / statistical workflows and LLM application patterns — enough to integrate them well.Experience building auditable systems in a regulated environment.