Software Engineer, AI Agent

Sendbird • San Mateo, CA

9h • Hybrid

About The Position

Sendbird, now rebranded as Delight.ai, is transitioning from being a leading CPaaS platform for in-app communications to an AI-first company focused on customer experience. For over a decade, Sendbird built the infrastructure for chat, voice, video, and messaging APIs, serving over 4,000 brands and handling 7 billion messages monthly for 300 million active users. Recognizing that AI would reshape customer interactions and commoditize existing infrastructure, the company made a strategic pivot in December 2024 to focus on AI-first customer experience. By February 2025, they launched their AI agent for enterprise CX, leveraging a decade of conversation data with added intelligence. The new brand, Delight.ai, emphasizes delivering customer delight rather than just efficiency or cost savings, aiming to make customers feel truly understood and cared for. Delight.ai's product is an AI concierge for customer experience that builds memory over time, learns preferences, and connects context across all channels (chat, SMS, email, voice, WhatsApp). Unlike most AI agents, it remembers past interactions to make customers feel understood, seen, and remembered. This Software Engineer role is crucial because AI agents often fail in production due to edge cases, prompt issues, or integration problems. The position focuses on bridging the gap between sandbox functionality and real-world performance. Engineers will deploy AI agents for major brands, each with unique workflows and data, requiring them to understand customer problems and build solutions rapidly. The role is for engineers who view AI as a core tool to accelerate timelines and deliver immediate, high-quality impact. You will own the full technical lifecycle of customer AI agent deployments, from initial integration to live monitoring, working at the intersection of product, engineering, and customer outcomes.

Requirements

• 2-3 years of hands-on software engineering experience in full-stack or backend development
• Strong Python proficiency and the ability to write clean, maintainable code under real-world constraints
• Practical experience with React and modern JavaScript/TypeScript on the frontend, plus backend frameworks like Node.js, Django, or Express
• Hands-on experience with LLM APIs (e.g., OpenAI, Claude) or agent frameworks such as LangChain
• Familiarity with RAG pipelines, knowledge base integration, and cloud deployment platforms (e.g., AWS Lambda, Vercel, GCP Cloud Functions)

Nice To Haves

• Prior experience tuning or debugging AI agent performance in live, production environments - or in a forward deployed setting
• Background in 0-to-1 builds, customer-facing implementation, or technical consulting, with a track record of navigating the messiness of real deployments

Responsibilities

• Deploy production-grade AI agents tailored to each customer's environment, owning setup, configuration, and go-live
• Tune system prompts and agent behaviors against real-world use cases, using AI-assisted workflows to move from hypothesis to working solution faster than a traditional dev cycle allows
• Prototype and ship fast, leveraging agentic coding tools to build agent interfaces, dashboards, and backend integrations with Next.js, React, and modern APIs
• Integrate RAG pipelines and knowledge bases that give agents the context they need to perform
• Monitor live deployments with logging, metrics, and observability so issues surface before customers notice them
• Collaborate with Forward Deployed PMs, core product, and design to turn customer needs into working solutions, often building a prototype before the meeting ends
• Lead technical demos, document implementation decisions, and maintain architecture diagrams that actually reflect reality

Benefits

• Medical, dental, and vision coverage, on us. Sendbird covers 100% of the premium for our employees and roughly 80% for their dependents.
• Generous time off. 20 days PTO, 13 company holidays, 7 sick days, 2 rest & rejuvenation days, 1 volunteer day, and your birthday off.
• $3,500 annual "Be Your Best Self" boost. Spend it on anything that helps you grow. Gym memberships, therapy, books, courses, massages, and more.
• Parental leave for all new parents. Time to be present for the moments that matter most.
• 401(k) from day one. Auto-enrollment, flexible contributions, and access to Vanguard's investment platform.
• HSA & FSA options. Pre-tax accounts to cover healthcare, dependent care, and commuter expenses.
• Life & disability coverage, fully paid. Life insurance and AD&D at 2x your salary, plus short- and long-term disability at no cost to you.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: No Education Listed
• Number of Employees: 101-250 employees