CriticalRiver Inc.
Senior Full Stack Engineering Lead (Pleasanton)
CriticalRiver Inc., Pleasanton, California, United States, 94566
Title:
Senior Engineering Lead (Full-Stack, Enterprise SaaS Systems) Location:
Pleasanton, California (hybrid work, 2-3 days per week onsite) Job type:
Fulltime/Contract
Role Overview: This is a senior individual contributor role requiring 12+ years of software engineering experience, with at least 10+ years building enterprise-grade, B2B SaaS applications. As a Senior Engineering Lead, you will own end-to-end architecture, design, and implementation of complex systems across frontend, backend, APIs, microservices, and data pipelines. Youll drive technical execution through hands-on contributions, applying AI-assisted developer workflows to accelerate delivery and quality. You will serve as a technical authority, collaborating closely with peers and stakeholders, while ensuring that our platform is scalable, performant, secure, and reliable.
Core Responsibilities: Architect and scale enterprise systems: Design across frontend, backend, APIs, microservices, and data pipelines, aligned to SaaS reliability and security standards. Hands-on development: Write production-quality code, conduct architecture reviews, lead complex refactors, and contribute to critical development cycles. Rapid feature delivery: Ship robust features at speed using modern development practices and AI-assisted workflows. AI-accelerated engineering: Leverage tools such as Copilot, Cursor, Replit, Claude/other agents, PromptPex for coding, refactoring, and testing. Spike-first prototyping: Validate new feature ideas through quick prototypes and experiments before full implementation. Cloud-native integration: Build services and infrastructure for LLMs, RAG pipelines, vector databases, and AI agent workflows. Technical documentation: Produce high-quality design docs, specs, and internal technical narratives. Cross-functional collaboration: Work with Product, UX, Analytics, and Security to align technical solutions with business needs. System reliability: Define SLOs/SLIs, enhance observability, and ensure services meet performance and availability targets.
Required Qualifications: 12+ years in software engineering, with a focus on enterprise B2B SaaS systems. 10+ years of hands-on development building scalable, reliable, modular SaaS products. Proficiency in frontend and backend engineering (React/TypeScript, Node.js/Python, SQL/NoSQL). Strong experience with system design, distributed systems, and cloud infrastructure (AWS, GCP, or Azure). Familiarity with microservices, containerization, Kubernetes, CI/CD pipelines, and observability tooling. Demonstrated ability to ship complex features under tight deadlines in high-growth or startup environments. Experience integrating AI-assisted developer tools into workflows.
Senior Engineering Lead (Full-Stack, Enterprise SaaS Systems) Location:
Pleasanton, California (hybrid work, 2-3 days per week onsite) Job type:
Fulltime/Contract
Role Overview: This is a senior individual contributor role requiring 12+ years of software engineering experience, with at least 10+ years building enterprise-grade, B2B SaaS applications. As a Senior Engineering Lead, you will own end-to-end architecture, design, and implementation of complex systems across frontend, backend, APIs, microservices, and data pipelines. Youll drive technical execution through hands-on contributions, applying AI-assisted developer workflows to accelerate delivery and quality. You will serve as a technical authority, collaborating closely with peers and stakeholders, while ensuring that our platform is scalable, performant, secure, and reliable.
Core Responsibilities: Architect and scale enterprise systems: Design across frontend, backend, APIs, microservices, and data pipelines, aligned to SaaS reliability and security standards. Hands-on development: Write production-quality code, conduct architecture reviews, lead complex refactors, and contribute to critical development cycles. Rapid feature delivery: Ship robust features at speed using modern development practices and AI-assisted workflows. AI-accelerated engineering: Leverage tools such as Copilot, Cursor, Replit, Claude/other agents, PromptPex for coding, refactoring, and testing. Spike-first prototyping: Validate new feature ideas through quick prototypes and experiments before full implementation. Cloud-native integration: Build services and infrastructure for LLMs, RAG pipelines, vector databases, and AI agent workflows. Technical documentation: Produce high-quality design docs, specs, and internal technical narratives. Cross-functional collaboration: Work with Product, UX, Analytics, and Security to align technical solutions with business needs. System reliability: Define SLOs/SLIs, enhance observability, and ensure services meet performance and availability targets.
Required Qualifications: 12+ years in software engineering, with a focus on enterprise B2B SaaS systems. 10+ years of hands-on development building scalable, reliable, modular SaaS products. Proficiency in frontend and backend engineering (React/TypeScript, Node.js/Python, SQL/NoSQL). Strong experience with system design, distributed systems, and cloud infrastructure (AWS, GCP, or Azure). Familiarity with microservices, containerization, Kubernetes, CI/CD pipelines, and observability tooling. Demonstrated ability to ship complex features under tight deadlines in high-growth or startup environments. Experience integrating AI-assisted developer tools into workflows.