Senior Software Engineer

Founding Senior Software Engineer (Backend)

Location: San Carlos, CA (Onsite)

Compensation: $200K – $275K base + bonus + equity

Visa Sponsorship Available

A fast-moving AI company is looking for a Senior Backend Engineer to join a small, high-performing team building the infrastructure that powers intelligent, voice-based agents in real-world, high-stakes environments. This role is ideal for an engineer who loves solving complex problems, building for scale, and working alongside some of the best technical minds in AI.

We move fast, iterate even faster, and ship to production frequently. It’s a work hard, play hard culture—demanding, rewarding, and designed for builders who take pride in delivering rock-solid backend systems that power real-time AI at scale.

What You’ll Be Doing

Architect, design, and implement scalable backend services that support real-time voice-based AI interactions

Own and improve core infrastructure components including APIs, databases, and distributed systems

Optimize systems for performance, reliability, and maintainability under heavy load

Collaborate closely with product, ML, and frontend teams to bring new features to life

Proactively identify bottlenecks and propose innovative solutions to improve system performance

Write clean, well-documented, and testable code with a focus on long-term maintainability

Help set engineering best practices and mentor junior team members as the team scales

What You Bring:

Bachelor's degree in Computer Science, Electrical Engineering, or a related technical field at TOP Computer Science University

3+ year of experience in a technical role (software engineering, systems integration, or similar)

Deep expertise in at least one backend language (Python, Go, Rust, Java, etc.)

Strong experience with cloud infrastructure (AWS/GCP), databases (SQL + NoSQL), and distributed systems

Strong communication and interpersonal skills—you can clearly explain complex topics to both technical and non-technical audiences

Comfortable working across both engineering and sales functions; highly collaborative and results-driven

Fast-moving and adaptable—able to manage multiple priorities and pivot quickly as needs evolve

Passionate about learning and eager to grow with a mission-driven team

Perks & Benefits:

100% employer-paid medical, dental, and vision insurance

Free daily meals (breakfast, lunch, dinner) and unlimited snacks

Gym access and commuter reimbursement

Internet and mobile phone expenses covered

Visa and green card sponsorship