Sr. Software Engineer AI Voice & Messaging Agents

Who We Are:

Bandwidth , a prior “Best of EC” award winner, is a global software company that helps enterprises deliver exceptional experiences through voice, messaging, and emergency services. Reaching 65+ countries and over 90 percent of the global economy, we're the only provider offering an owned communications cloud that delivers advanced automation, AI integrations, global reach, and premium human support. Bandwidth is trusted for mission-critical communications by the Global 2000, hyperscalers, and SaaS builders!

At Bandwidth, your music matters when you are part of the BAND.  We celebrate differences and encourage BANDmates to be their authentic selves.  #jointheband

We are seeking a Senior Software Engineer to take an AI voice agent platform from working concept to shipping, revenue-generating product.

This isn't an R&D role. The research phase proved the concept works. The engine runs — now we need to build the car around it. We're looking for someone who builds products — someone who ships code to real customers, watches how they use it, and ships again next week. You'll be joining a small, high-caliber team with deep voice and telephony expertise, and your job is to help us turn that foundation into a SaaS platform that resellers can white-label and deploy for thousands of SMBs.

The Innovation Studio operates like a startup — backed by the infrastructure of a public company. We optimize for learning speed, not perfection. If you've spent your career inside enterprise release processes and that's where you're comfortable, this isn't the right fit. If you've been waiting for a team that ships at the pace of a startup but sits on top of a global communications network — keep reading.

How You Work Matters As Much As What You Know:

This is a senior IC role. You lead by example, not management authority.

• Engineering Fundamentals Are Non-Negotiable: You understand software design, system architecture, and why things break at scale — not because you read about it, but because you've built through it.
• Product Shipping Experience: You've built and launched products that real customers use — ideally in a startup or high-growth environment. Prototypes and POCs don't count.
• AI as a Force Multiplier, Not a Crutch: You've embraced AI development tools as a core part of how you work. You use AI to move faster while your experience and judgment ensure the output is sound.
• Deep Instincts Over Blind Trust: When AI generates code, you know whether it's good — and more importantly, you know when it's subtly wrong.
• Full-Stack Fearlessness: When you hit an unfamiliar domain, your instinct is to pick it up and move fast — using AI to operate across the full stack without sacrificing quality.

This combination — strong fundamentals amplified by AI fluency — is a first-class requirement, not a nice-to-have.

What You'll Do:

• Ship the Product: Build