Design and scale backend services for AI-driven sales automation and agentic workflows. Own end-to-end features spanning databases, APIs, background processing, and integrations. Collaborate with product, AI, and frontend teams while championing code quality, testing, performance, security, scalability, and maintainable architecture. The role involves PHP and Python development, cloud infrastructure, asynchronous processing, third-party and LLM integrations, microservices, and multi-tenant SaaS systems.