Staff Engineer (Backend + AI) : Sphere

We are seeking a Staff Engineer for Sphere, our flagship conversational AI platform that powers the most impactful and widely adopted experiences in our ecosystem. Sphere spans intelligent voice agents and next-generation digital assistants—helping millions of users navigate complex, real-world tasks in regulated environments.

As a core engineering leader on this team, you will design, build, and evolve distributed systems and AI pipelines that drive human-like interactions, multimodal memory, and real-time decision-making across speech and chat modalities. This is one of the most mission-critical, revenue-generating platforms in our company, directly shaping the future of user-facing AI in financial services.

• Lead architecture and delivery of high-scale, low-latency backend systems supporting multimodal conversational agents (voice and digital)
  
• Build and maintain orchestration logic, memory frameworks, and dynamic routing for real-time, multi-turn AI interactions
  
• Design extensible APIs and interaction models that integrate with tools, transactions, and domain-specific workflows
  
• Collaborate with ML and infrastructure teams to productionize speech models, reasoning systems, and aligned LLM capabilities
  
• Drive improvements in latency, observability, fault-tolerance, and personalization across conversational surfaces
  
• Influence technical strategy, mentor engineers, and uphold engineering excellence across product lines
  
• Ensure compliance, auditability, and security are first-class considerations in all components and designs
  

• 8+ years of experience building backend or platform systems at scale, ideally in real-time or user-facing environments
  
• Deep understanding of asynchronous architecture, distributed systems, and event-driven orchestration
  
• Experience delivering production systems with real-time performance, stateful flows, and strong reliability guarantees
  
• Expertise in one or more backend stacks such as Node.js, Go, or Python, with emphasis on performance and maintainability
  
• Track record of working across product and infra teams to build secure, extensible, and AI-enabled systems
  
• Strong product instincts and a desire to contribute to platform-level thinking for conversational UX
  

• Experience with speech or voice systems, LLM-based agents, or multi-modal interface design
  
• Familiarity with memory frameworks, dialogue management, and inference orchestration at scale
  
• Background in regulated domains or enterprise-grade infrastructure design (security, logging, compliance)
  

• You'll work on the most impactful, revenue-generating AI products in the company
  
• You’ll help shape human-AI interaction at scale, across both synchronous voice and digital interfaces
  
• Your work will be foundational to millions of end-user conversations and high-stakes decision-making every day
  
• You’ll collaborate with a team that’s pushing the boundary of AI-first interfaces—moving fast, with technical rigor and user empathy

Compensation

The base salary range for this role will be between $210,000 and $240,000. Final compensation will be determined by a variety of factors, including, but not limited to your location, skills, experience, education, and/or professional certifications. During the phone screening, your recruiter will provide the location-specific salary range for this role. Regardless of your personal situation or where you are in the world, Interface.ai offers comprehensive and great benefits programs to meet your needs:

• 💡 100% paid health, dental & vision care
• 💰 401(k) match & financial wellness perks
• 🌴 Discretionary PTO + paid parental leave
• 🏡 Remote-first flexibility
• 🧠 Mental health, wellness & family benefits
• 🚀 A mission-driven team shaping the future of banking