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

Job Overview

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

Key Responsibilities

• Ship the Product: Build the SaaS platform layer that turns our AI voice agent into a multi-tenant, revenue-generating product — tenant management, partner APIs, configuration workflows, onboarding UX, operational dashboards, and the glue that holds it all together.
• Work Everywhere in the Stack: Backend services, frontend, infrastructure, AI pipeline — you go where the highest-priority work is. Role boundaries slow teams down; you ignore them.
• Close the Loop: Get features in front of real partners and real SMBs fast. You measure your work by what users do with it, not by what got merged.
• Lead Through Craft: You earn influence through code quality, smart trade-offs, and velocity — not title or tenure. You raise the bar through code review, design discussions, and pairing.
• Automate the Bottlenecks: When something in the dev cycle is slow or repetitive, your instinct is to script it, agent it, or eliminate it. You don't just build the product — you accelerate the system that builds it.

The Mindset

• Comfortable in Ambiguity: Requirements are evolving, priorities shift weekly, and the roadmap is measured in weeks, not quarters. That energizes you.
• Entrepreneurial Instinct: You think about the product, not just the code. You care whether what you built actually moves the business forward.
• Pragmatic over Clever: You prefer boring technology that scales over shiny technology that breaks. You build guardrails and observability — then move fast inside them.
• Low Ego, High Ownership: You're here to ship a product, not to be the smartest person in the room. You'll pick up whatever task moves the team forward, whether it's glamorous or not.

Nice-to-Haves

• Experience with real-time systems, voice/telephony, or conversational AI
• Hands-on experience with LLMs, agentic AI, prompt engineering, or model fine-tuning
• Experience building multi-tenant SaaS platforms or B2B2B products

What You'll Do

Ship the Product: Build the SaaS platform layer that turns our AI voice agent into a multi-tenant, revenue-generating product — tenant management, partner APIs, configuration workflows, onboarding UX, operational dashboards, and the glue that holds it all together.

Work Everywhere in the Stack: Backend services, frontend, infrastructure, AI pipeline — you go where the highest-priority work is. Role boundaries slow teams down; you ignore them.

Close the Loop: Get features in front of real partners and real SMBs fast. You measure your work by what users do with it, not by what got merged.

Lead Through Craft: You earn influence through code quality, smart trade-offs, and velocity — not title or tenure. You raise the bar through code review, design discussions, and pairing.

Automate the Bottlenecks: When something in the dev cycle is slow or repetitive, your instinct is to script it, agent it, or eliminate it. You don't just build the product — you accelerate the system that builds it.