Senior Software Engineer, Human Agent Interfaces (HAI)

The Experience

AI agents are changing how work gets done. Making them useful requires intuitive, reliable experiences that let people guide decisions, respond to requests and take action within their everyday tools.

We’re building interfaces that bring people and agents together across business workflows. You’ll help shape how users collaborate with AI, combining customer-facing product development with the engineering foundations needed to support enterprise customers.

The Team

The Human Agent Interfaces (HAI) team builds the surfaces where people and agents work together, including notifications, task interactions, conversational and Copilot experiences, and the tools agents use to act on workflows.

We’re a small team with broad ownership and a fast pace. You’ll work across the stack and own features from design and prototyping through implementation, rollout and customer feedback. Our work spans React, TypeScript, backend services, GraphQL, Model Context Protocol (MCP), and integrations with Microsoft Teams, Slack and email.

What You’ll Actually Be Doing

• Design, build and ship intuitive experiences that help people and AI agents collaborate on business workflows.
• Develop full-stack features across web applications, conversational interfaces and collaboration platforms such as Microsoft Teams, Slack and email.
• Build APIs and agent tooling using technologies such as GraphQL, REST and MCP to connect users, agents and workflows.
• Create consistent interaction patterns that let users stay informed, provide input and complete work across channels.
• Build secure, reliable integrations, including authentication, authorization, notifications and account connectivity.
• Develop conversational and agentic experiences, using evaluations and customer feedback to improve quality and reliability.
• Own the feature lifecycle, from technical design and implementation through staged rollout, production operation and iteration.

Shared

Responsibilities

• Partner with Product, Design, Customer Success and customers to translate needs into clear requirements and practical solutions.
• Write design documents and RFCs, build prototypes and communicate technical tradeoffs.
• Raise engineering quality through code review, automated testing, documentation and operational excellence.
• Use AI coding tools effectively and critically evaluate generated code for correctness, security, performance and maintainability.
• Mentor engineers and contribute to a collaborative team with strong technical judgment and shared ownership.

Long-Term Strategic Impact

• Shape the architecture and technical direction of interfaces that connect people, agents and business processes.
• Establish reusable patterns for integrations, interaction models and agent tooling as the product grows.
• Improve scalability, observability and reliability while keeping the team’s ability to deliver quickly.
• Help turn customer insights and emerging AI capabilities into a coherent product experience.

You’re Our Person If…

• You have 6+ years of software engineering experience delivering production software, with scope and technical leadership appropriate to the Senior, Lead or Principal level.
• You have strong proficiency in TypeScript/JavaScript and a modern backend language such as Go, Java or Python.
• You have experience building customer-facing web applications with React or a comparable framework.
• You have designed and implemented GraphQL or REST APIs and integrated with third-party services using webhooks and asynchronous communication.
• You understand authentication and authorization patterns, including OAuth, SSO and secure service integration.
• You have experience building and operating distributed systems or SaaS applications on a public cloud.
• You take ownership from ambiguous requirements through production delivery, including monitoring and controlled releases.
• You communicate clearly in writing and technical discussions, and collaborate effectively across engineering and product functions.
• You use AI development tools thoughtfully to accelerate delivery while maintaining engineering standards.

Even Better If…

• You have experience with MCP, LLM tool-calling, agent frameworks or evaluation-driven development.
• You have built applications or integrations for Microsoft Teams, Microsoft 365, Copilot, Slack or email.
• You have worked on conversational interfaces, notification systems or products that coordinate human and automated work.
• You have experience with workflow engines, business process automation or task-management products.
• You have hands-on experience with Go, GraphQL and PostgreSQL.
• You have helped build a product from an early stage or worked on a small team balancing rapid delivery with enterprise reliability.