Architect- Architecture Design Job at CriticalRiver Inc. in Pleasanton

Summary: Were hiring an exceptional Principal Architect to lead the ground-up design and build of our next-generation, multi-tenant SaaS platform for AI-powered financial intelligence and workflow automation. This is a true greenfield opportunity: architect, build, and launch a production-ready platform. Responsibilities: Own platform architecture end-to-end, including tech stack selection, multi-tenant design, auth systems, data architecture, and service topology. Lead the intelligence layer: LangGraph agent system, LLM integration strategy, and contextual intelligence design. Contribute high-impact code, drive engineering excellence, and accelerate execution velocity. Ensure infrastructure, security, reliability, and DevOps readiness. Requirements: ~12+ years of software engineering experience, including 5+ years in architect roles ~ Proven success in architecting and launching greenfield multi-tenant SaaS platforms ~ Product development experience with aggressive timelines ~ Expertise across frontend, backend, data, and cloud infrastructure (AWS preferred) ~ Strong experience with EKS/ECS, PostgreSQL, enterprise authentication, and high-performance systems ~ AI/LLM architecture experience: LangGraph/LangChain, agent-based systems, OpenAI/Anthropic integrations ~ Strong technical leadership and communication skills Good to have: Financial services experience, startup/rapid growth background, security/compliance expertise, and cost optimization skills.