Senior Platform Engineer – Voice AI

Stealth Startup; San Francisco (CA); On-site; USD 180,000 - 240,000; Full time

Job summary

Stealth Startup is hiring a Senior Platform Engineer to design and scale the core platform for a cutting-edge conversational AI product. You will shape the voice infrastructure, APIs, and developer-facing systems, collaborating closely with product and engineering teams to deliver scalable solutions.

The ideal candidate has senior-level software engineering experience with Voice AI and a track record building production-grade platforms in fast-paced startup environments using modern AI-assisted

Qualifications

• Professional-level software engineering experience.
• Must have Voice AI experience.
• Experience building platforms at a Voice AI startup preferred.
• Experience with real-time conversational systems or AI platforms.

Responsibilities

• Design, build, and scale core platform infrastructure for a conversational AI product.
• Develop high-performance systems for voice and conversational AI.
• Work on platform architecture, APIs, infrastructure, and developer-facing systems.
• Partner with engineering/product teams to deliver scalable solutions.
• Solve complex challenges in real-time voice and AI systems.
• Improve reliability, performance, and developer experience.
• Use AI-assisted coding tools to speed development.
• Own projects from architecture to production deployment.

Skills

Voice AI

Real-time systems

System design

Startup environment

AI coding tools

Tools

APIs

Scalability frameworks

Job description

We are seeking a Senior Platform Engineer to help build and scale a conversational AI platform focused on creating natural, human-like conversations.

This is a highly technical role for an experienced engineer who has worked with Voice AI and can move quickly using modern AI-assisted development tools. The ideal candidate has experience at a voice AI startup and is comfortable building scalable platform infrastructure.

Responsibilities

• Design, build, and scale core platform infrastructure for a conversational AI product.
• Develop reliable, high-performance systems supporting voice and conversational AI applications.
• Work on platform architecture, APIs, infrastructure, and developer-facing systems.
• Partner closely with engineering and product teams to deliver scalable solutions.
• Solve complex technical challenges involving real-time voice and AI systems.
• Improve system reliability, performance, scalability, and developer experience.
• Use AI-assisted coding tools to accelerate development and iteration.
• Take ownership of projects from architecture through production deployment.

Qualifications

• Senior-level software engineering experience.
• Required: Professional experience with Voice AI.
• Experience building products or platforms at a Voice AI startup is strongly preferred.
• Experience with real-time conversational systems, voice infrastructure, or AI platforms.
• Strong software engineering and system-design skills.
• Experience building scalable, production-grade platforms.
• Ability to code quickly and effectively using modern AI coding tools.
• Strong ownership, problem-solving, and communication skills.
• Comfortable working in a fast-paced startup environment.