Backend Developer - Python / AI (ID#5520)

New Value Solutions, a national IT consulting company, is seeking a Senior Backend Developer to support the development of two pre-launch, AI-native software products. This is a hands-on senior individual contributor role with significant ownership of backend architecture, development, deployment, and ongoing operations. The successful candidate will bring strong production Python experience together with practical experience building LLM-powered applications and agent-based systems. You will work as part of a small senior team using AI-assisted development tools as part of the day-to-day engineering workflow. This opportunity is expected to begin as a 3-month contract/fractional engagement, with the potential to move into a permanent full-time position. Candidates must be located in the Greater Toronto area. The role is a hybrid working arrangement. Responsibilities • Own backend architecture and development across two AI-native products. • Design and develop scalable APIs and backend services using Python and FastAPI. • Build and enhance LLM-powered features, including tool-calling agents, agent routing, conversation memory, structured outputs, and RAG. • Design and maintain PostgreSQL databases, schemas, migrations, and data access layers. • Build secure, scalable multi-tenant services and real-time/data-processing capabilities. • Support production deployment and operations, including CI/CD and cloud infrastructure. • Maintain strong engineering practices around testing, documentation, security, and code quality. Requirements • 7+ years of backend software engineering experience. • 3+ years of experience building production Python services, ideally using FastAPI or similar asynchronous frameworks. • Hands-on experience developing LLM-powered product features or agent systems, beyond basic API integration. • Strong PostgreSQL and relational database experience, including schema design, migrations, indexing, and query performance. • Experience developing multi-tenant SaaS applications, including authorization, tenant isolation, and RBAC. • Production experience with Docker, Kubernetes, CI/CD, and infrastructure-as-code. • Regular hands-on use of AI development tools such as Claude Code, Cursor, GitHub Copilot, or similar. • Strong written communication and documentation skills. • Experience with Go, Temporal or similar workflow engines, RAG/vector search, real-time systems, and gRPC/Protobuf would be considered an asset. If you have the necessary expertise and are able to work in a hybrid arrangement in the Greater Montreal area, please submit your resume. While we thank all candidates in advance for their application, only those shortlisted will be contacted. ID# 5520