Staff Software Engineer (Backend & AI)

Join our team as a Staff Software Engineer focused on Backend & AI. In this role, you will design and build backend systems that power real-time voice AI at scale, develop AI prompting strategies, and drive architectural decisions. You will also mentor engineers, contribute to technical strategy, and collaborate closely with product and customers. Enjoy benefits such as unlimited vacation days, 401k with match, and platinum medical benefits.

• Concevoir et construire des systèmes backend qui alimentent l'IA vocale en temps réel à grande échelle, en mettant l'accent sur la latence, la fiabilité et l'observabilité.
• Développer et affiner les stratégies de prompt AI pour les agents vocaux conversationnels, en optimisant le dialogue naturel, la précision et la gestion des cas limites.
• Posséder la couche d'orchestration AI, de l'ingénierie des prompts à la gestion du contexte, en passant par l'appel d'outils et le streaming des réponses.
• You're obsessed with building reliable, low-latency infrastructure and equally passionate about crafting prompts and orchestration layers that make AI feel magical. You understand that great AI products aren't just about the models—they're about the systems that surround them. You take ownership of complex problems, influence technical direction across teams, and elevate those around you
• Excellent communication skills—you can explain complex technical concepts clearly to both engineers and non-technical stakeholders
• Experience with low-latency systems where milliseconds matter
• Hands-on experience with LLMs—prompt engineering, fine-tuning, RAG architectures, or building AI-powered features
• 10+ years of software engineering experience, with significant time spent in backend or infrastructure roles
• Deep expertise in Python or Go (or similar languages) for building production systems
• Track record of technical leadership—influencing architecture, mentoring engineers, and driving cross-functional initiatives
• A bias toward shipping—you balance technical excellence with pragmatism
• Strong understanding of distributed systems, including event-driven architectures, async processing, and real-time data pipelines
• Experience with voice AI, telephony, or real-time communication systems (WebRTC, SIP, SBCs)
• Familiarity with speech-to-text, text-to-speech, or VAD technologies
• Background in prompt optimization at scale—A/B testing prompts, building prompt management systems
• Experience with telecom, contact center, or conversational AI products
• Exposure to early-stage startups or high-growth companies, with a passion for driving results in fast-moving environments