Sr. AI Engineer

The posting, as 6sense wrote it

Our Mission

6sense's mission is to multiply what matters: growth, retention, and efficiency. We envision a future where companies, teams and people reach their full potential.

Our People

People are the heart and soul of 6sense. We serve with passion and purpose. We live by our Being 6sense values of Win as One Team, Stay Curious, Do The Right Thing, Own the Outcome, and Create Belonging. Every 6sensor plays a part in defining the future of our industry-leading technology. 6sense is a place where difference-makers roll up their sleeves, take risks, act with integrity, and measure success by the value we create for our customers. We want 6sense to be the best chapter of your career.

Senior AI Engineer, Agentic Platform
Location: San Francisco Bay Area or Austin, TX (Hybrid)

About the Role

6sense has agents and an MCP server in production today, used by real customers. This role takes them further by building more capable agents, strengthening the API and tool layer, and expanding an ecosystem that external agents, clients, and partners can connect to.

You'll work across the full path from a customer's agent to 6sense data and actions, including APIs, tools, MCP, orchestration, context, evaluation, and security.

6sense is working to become the default Contextual Intelligence layer for B2B, and agents and MCP are how that context reaches customers, partners, and their AI tools. You'll partner closely with the team building contextual intelligence, write production Python daily, own multi-month projects, support the teams and customers who depend on these systems, and keep the platform current as the agent tooling landscape evolves.

What You'll Own

Agents and Orchestration

• Extend LangGraph orchestrators with typed state, conditional routing, subgraphs, checkpointing, durable execution, and human-in-the-loop workflows.
• Select and implement routing, orchestrator-worker, plan-and-execute, reflection, and multi-agent handoff patterns based on business needs.
• Run agents headless through API-first and MCP-first architectures across in-app, chat, workflow, and partner surfaces from a shared core.
• Build and maintain reusable components for state management, memory, tool-calling, and agent-to-agent delegation with scoped permissions.

APIs, Tools, and MCP

• Evolve the APIs and tools agents use to access 6sense data and take action for both human and LLM consumers.
• Optimize tool design for agent success, including naming, descriptions, schemas, response formats, error handling, and token efficiency.
• Re-design and scale the MCP layer for production workloads, including concurrency, per-tenant quotas, latency budgets, caching, graceful degradation, backward compatibility, and adoption of emerging MCP capabilities.
• Onboard external MCP clients, AI assistants, agent platforms, and partners. Develop integration guides and reference clients and define trust boundaries for third-party MCP server integrations.
• Strengthen platfor

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n, and stock options if approved by 6sense’s board. In addition, 6sense provides a variety of benefits, including generous health insurance coverage, life, and disability insurance, a 401K employer matching program, paid holidays, self-care days, and paid time off (PTO).

Our Benefits

Full-time employees can take advantage of health coverage, paid parental leave, generous paid time-off and holidays, quarterly self-care days off, and stock options. We’ll make sure you have the equipment and support you need to work and connect with your teams, at home or in one of our offices.

We have a growth mindset culture that is represented in all that we do, from onboarding through to numerous learning and development initiatives including access to our LinkedIn Learning platform. Employee well-being is also top of mind for us. We host quarterly wellness education sessions to encourage self care and personal growth. From wellness days to ERG-hosted events, we celebrate and energize all 6sense employees and their backgrounds.

Equal Opportunity Employer

6sense is an Equal Employment Opportunity and Affirmative Action Employers. Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender perception or identity, national origin, age, marital status, protected veteran status, or disability status. If you require reasonable accommodation in completing this application, interviewing, completing any pre-employment testing, or otherwise participating in the employee selection process, please direct your inquiries to jobs@6sense.com .

We are aware of recruiting impersonation attempts that are not affiliated with 6sense in any way. A ll email communications from 6sense will originate from the @6sense.com domain . We will not initially contact you via text message and will never request payments . If you are uncertain whether you have been contacted by an official 6sense employee, reach out to jobs@ 6sense.com