Senior Python Engineer

ph3Senior Backend Engineer (Python / FastAPI): Multi-Tenant Cloud Migration /h3h3About the Project /h3pWe are migrating multiple business-critical applications from a single-tenant Hub-and-Spoke architecture to a scalable, multi-tenant, cloud-native backend. The platform must be highly available, secure, scalable, and high-throughput, with a strong focus on async processing, API performance, database efficiency, authentication, and production readiness. This is a delivery-driven engagement with firm deadlines and a broad group of stakeholders. It is a high-visibility position within the organization, with a strong likelihood of extension for engineers who deliver. /ph3The Role /h3pYou will combine hands-on application migration with backend development. You will work independently, own your deliverables end to end, and communicate clearly and proactively with technical and business stakeholders. /ph3Key responsibilities /h3ulliMigrate business-critical applications from a single-tenant Hub-and-Spoke architecture to a multi-tenant, cloud-native platform /liliEnable multi-tenancy across existing applications and services /liliDesign and build new REST APIs and backend functionality using Python and FastAPI /liliDevelop scripts and automation for data and configuration migration /liliDesign and optimize PostgreSQL schemas, queries, and data access patterns for efficiency at scale /liliImplement async processing and high-throughput API design /liliImplement authentication and security, including SSO, OAuth, OIDC, PKCE, On-Behalf-Of (OBO) flow, and API key authentication /liliContainerize applications with Docker and deploy them on Azure Container Apps /liliBuild and maintain CI/CD pipelines in Azure DevOps /liliEnsure production readiness through automated testing, logging, monitoring, and observability /liliDebug, troubleshoot, and optimize performance in production environments /liliIntegrate Azure AI services into the backend /li /ulh3Technology Stack /h3ulliLanguages and frameworks: Python, FastAPI /liliDatabase and ORM: PostgreSQL, SQLAlchemy /liliContainerization: Docker /liliCloud: Azure Container Apps, Azure Database for PostgreSQL Flexible Server, Azure AI Search, Azure Document Intelligence, Azure AI Foundry /liliDevOps: Azure DevOps, CI/CD /liliArchitecture: Multi-tenant, cloud-native /li /ulh3Required Skills and Experience /h3ulliPython developmentulliStrong Python development experience /liliDeep FastAPI expertise (essential) /liliStrong object-oriented programming skills and application of SOLID principles /liliAsync programming /li /ul /liliScripting and automation /liliDatabaseulliDeep understanding of PostgreSQL and its capabilities /liliStrong database design skills /liliExperience with SQLAlchemy or an equivalent Python ORM (essential), including transactions and connection management /liliNoSQL experience (a plus) /li /ul /liliAPI design and developmentulliREST API design /liliRate limiting and validation /liliAPI versioning and error handling /liliHigh-throughput API design /li /ul /liliAuthentication and securityulliSSO, OAuth, OIDC, and PKCE /liliOn-Behalf-Of (OBO) flow /liliAPI key authentication /liliSecure API development practices /li /ul /liliArchitecture and scalabilityulliMulti-tenant architecture /liliHighly available and scalable systems /liliResilience and fault tolerance /liliDistributed-system concepts /li /ul /liliCloud and containerizationulliAzure-based application architecture /liliDocker and containerized applications /liliAzure DevOps and CI/CD /li /ul /liliProduction engineeringulliAutomated testing /liliLogging, monitoring, and observability /liliDebugging and troubleshooting /liliPerformance optimization /li /ul /liliAI fluencyulliFamiliarity with RAG, document processing, and visual processing concepts /liliExperience working with AI-assisted development tools (e.g., GitHub Copilot) /li /ul /li /ulh3What Sets a Strong Candidate Apart /h3ulliDirect experience delivering a migration project, ideally moving legacy or single-tenant systems to a multi-tenant, cloud-native architecture /liliA track record of independent ownership: you can clearly explain the technical decisions you made and the parts you personally designed and implemented /liliClear, proactive communication with stakeholders under tight deadlines /liliComfort defending architectural and technical decisions in a deep, rigorous technical discussion /li /ulh3Interview Process /h3pThe technical interview will be conducted by a senior engineer and will be in-depth. Expect detailed questions on your hands-on contributions, technical decision-making, and specific examples of ownership from previous projects, particularly around Python, API design, Azure, Docker, security and authentication, and migration work. Please be prepared to discuss what you personally built and delivered, rather than what the team accomplished. /p /p #J-18808-Ljbffr