Senior Full Stack Engineer, Conversational Interfaces

San Jose/ San Francisco Bay Area

interface.ai is the industry's-leading specialized AI provider for banks and credit unions, serving over 100 financial institutions. The company's integrated AI platform offers a unified banking experience through voice, chat, and employee-assisting solutions, enhanced by cutting-edge proprietary Generative AI.

Our mission is clear: to transform the banking experience so every consumer enjoys hyper-personalized, secure, and seamless interactions, while improving operational efficiencies and driving revenue growth.

interface.ai offers pre-trained, domain-specific AI solutions that are easy to integrate, scale, and manage, both in-branch and online. Combining this with deep industry expertise, interface.ai is the AI solution for banks and credit unions that want to deliver exceptional experiences and stay at the forefront of AI innovation.

About the Role

We are seeking a Senior Full Stack Engineer to join the Sphere team, building our flagship conversational AI platform that powers millions of voice and chat interactions for credit unions and banks.

This is a highly impactful role where you will design and implement modern frontend applications and high-performance backend services. You will own systems end-to-end - from responsive, interactive web applications to distributed microservices - ensuring that every experience is performant, secure, and delightful.

You will collaborate closely with design, product, and AI teams to create seamless, intelligent, and scalable customer journeys. This is an opportunity to shape a platform that serves end-users, frontline agents, and enterprise leaders - all through data-driven, AI-first experiences.

What You’ll Do

  • Architect and build modern frontend applications using React (or equivalent) with micro-frontend architecture, design libraries, and reusable UI components.

  • Build customer-facing applications and digital assistants with real-time personalization and contextual rendering.

  • Design and develop distributed microservices that support high-concurrency, low-latency conversational experiences.

  • Build complex backend architectures to power APIs, events, orchestration layers, and data pipelines.

  • Implement event-driven systems, caching layers, and scalable API contracts

  • Optimize for performance, reliability, observability, and fault tolerance in production environments.

What You Bring

  • 6+ years of full stack engineering experience with proven expertise in both frontend and backend development.

  • Advanced proficiency in JavaScript/TypeScript and experience with React.js (or equivalent modern frameworks).

  • Experience architecting micro-frontends, reusable UI libraries, and design systems for large-scale applications.

  • Deep understanding of distributed backend systems, concurrency patterns, and performance tuning.

  • Proficiency in at least two backend languages (e.g., Node.js, Go, Java) with hands-on experience in building scalable microservices.

  • Experience integrating AI/ML systems or APIs (e.g., LLMs, RAG pipelines, NLP/NLU services) into production systems.

  • Familiarity with DevOps, CI/CD pipelines, observability tooling, and modern cloud environments (AWS/GCP/Azure).

  • Strong product sense and ability to collaborate across design, product, and AI/ML teams to deliver user-centric features.

  • Experience in B2B SaaS or regulated industries (fintech preferred) is a plus.

  • Familiarity with AI-driven personalization, conversation flows, or agent orchestration is a strong plus.

Why Join Us

  • Work on mission-critical, revenue-generating AI products used by millions of credit union members.

  • Shape end to end architecture, ensuring a seamless AI-powered journey for users.

  • Collaborate with top-tier engineers, product leaders, and AI researchers solving complex technical problems at scale.

Be part of a fast-growing, AI-first company where engineering craft and innovation are highly valued.

Compensation

Base compensation is expected to be between $165,000 - $190,000. Exact compensation may be based on skills and location with equity included.

Benefits

  • Health: medical, dental, and vision insurance and wellbeing resources and programs
  • Time away: Public holidays and discretionary PTO package for flexible days off with manager approval
  • Financial: 401K, ESPP, Basic life and AD&D insurance, long-term and short-term disability
  • Family: parental leave
  • Development: Access to internal professional development resources.

At interface.ai, we are committed to providing an inclusive and welcoming environment for all employees and applicants. We celebrate diversity and believe it is critical to our success as a company. We do not  discriminate on the basis of race, color, religion, national origin, age, sex, gender identity, gender expression, sexual orientation, marital status, veteran status, disability status, or any other legally protected status. All employment decisions at Interface.ai are based on business needs, job requirements, and individual qualifications. We strive to create a culture that values and respects each person's unique perspective and contributions. We encourage all qualified individuals to apply for employment opportunities with Interface.ai and are committed to ensuring that our hiring process is inclusive and accessible.

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