Senior Software Engineer, Voice Agent

About Decagon Decagon is the leading conversational AI platform empowering every brand to deliver concierge customer experiences. Our technology enables industry-defining enterprises like Avis Budget Group, Block’s Cash App and Square, Chime, Oura Health, and Hunter Douglas to deploy AI agents that power personalized, deeply satisfying interactions across voice, chat, email, SMS, and every other channel. We’re building a future where customer experiences are being redefined from support tickets and hold music to faster resolutions, richer conversations, and deeper relationships. We’re proud to be backed by world-class investors who share that vision, including a16z, Accel, Bain Capital Ventures, Coatue, and Index Ventures, along with many others. We’re an in-office company, driven by a shared commitment to excellence and velocity. Our values — Just Get It Done, Invent What Customers Want, Winner’s Mindset, and The Polymath Principle — shape how we work and grow as a team. About the Team The Voice Agent team builds the real-time systems that allow Decagon agents to carry natural conversations across our omnichannels (phone, web, mobile, etc). We work across speech understanding, audio streaming, synthesis quality, and the voice specific execution logic that enables timing, pacing, and responsive dialogue. Our systems must remain accurate, responsive, and stable at scale. Voice is one of the most technically challenging surfaces in conversational AI, and our small team owns this entire capability end to end. About the Role As a Senior Software Engineer focused on Voice Agent, you will design and improve the systems that power Decagon’s live voice agents. You will work across streaming audio, transcription, synthesis, timing, and real time orchestration. You will collaborate closely with Research to bring new models to production, with Infra to optimize performance, and with Product to unlock new conversational capabilities. In this role, you will - Build the real time voice runtime that powers natural customer conversations - Improve speech understanding and synthesis quality while keeping latency low - Design systems that manage timing, interruptions, and streaming audio reliably - Create tools that make voice interactions easy to debug, test, and observe at scale Your background looks something like this - 5+ years of experience in software engineering - Proficiency with Typescript, Python, and asynchronous programming - Experience with asynchronous or streaming systems - Strong debugging skills across audio, networking, or real time pipelines - An interest in speech, audio, or multimodal AI Even better - Experience with speech recognition or synthesis systems - Experience with VAD, streaming protocols, or other real time audio systems - Experience designing or maintaining LLM driven applications - Experience optimizing performance for low latency use cases Compensation $200K – $400K + Offers Equity This range reflects the expected compensation for this role. Compensation within the range is determined based on experience, skills, and the scope of responsibilities, with flexibility for candidates who demonstrate exceptional impact. In addition to base salary, we offer competitive equity. Final compensation may vary based on location within the United States. Benefits We proudly offer the following benefits for our full-time employees: - Take what you need vacation policy - Medical, Dental, and Vision benefits for you and your family - Life Insurance and Disability Benefits - Retirement Plan (e.g., 401K, pension) - Parental Leave - Fertility and family building benefits through Carrot - Daily lunches and snacks in the office to keep you at your best These benefits are described in more detail in Decagon’s policies, may vary by location, and can change at any time according to applicable compensation and benefits plans.