Senior Software Engineer - AI Tools & Context Team

At HubSpot, we’re on a mission to help millions of organizations grow better. Our platform is used by businesses worldwide to manage their marketing, sales, service, and operations — and under the hood, our product is built to be flexible, secure, and empowering for both our customers and our own engineering teams. We believe in autonomy, curiosity, and building a workplace where everyone can thrive.

Senior Software Engineer, Backend

Meet the Team: AI Tools & Context Team - Flywheel Group

Flywheel: Help HubSpot’s internal sales teams become the most efficient and effective in the industry by creating AI-powered tools to eliminate repetitive tasks, enhance collaboration, and drive consistent deal progression.

Our goal is to enable each sales rep to improve deal velocity, adopt best practices seamlessly, and spend more time engaging with prospects/customers, providing an excellent buying experience.

The AI Tools & Context team is building internal tools that power smarter and more efficient AI agents. There are multiple agents used across the Flywheel Group, and our mission is to build a reusable set of tools that allows us to rapidly extract, reuse, and act on contextual insights. We also aim to create a more unified user experience by allowing multiple agents to seamlessly share context when a user is transferred between them.

This is a greenfield team where you’ll have the opportunity to shape the foundation of a high-impact capability area at HubSpot.

What’s the day-to-day like?

• Building backend systems and AI tooling that enable agent capabilities across the Flywheel Product Line.

• Working closely with other engineers, product managers, and internal stakeholders to solve complex data and infrastructure problems.

• Collaborating on system design, implementation, and best practices.

• Building data pipelines, retrieval systems, and backend integrations with AI models.

• Solving hard problems related to data and data quality. 

• Mentoring teammates and helping shape the engineering culture on a new team.

How are we growing?

We’re starting small but plan to grow the team over the next several months, and potentially beyond. You’ll be part of the foundational team that defines how we build, collaborate, and deliver impact.

Responsibilities:

• Building reusable agent infrastructure and internal tools to serve multiple product teams.

• Developing intelligent systems that can search and extract meaning from complex data sources (e.g. hours of call transcripts).

• Owning the backend architecture for search, retrieval, and orchestration of agent context.

• Build scalable data pipelines and AI integrations with performance and reliability in mind.

• Collaborate with product and engineering stakeholders across HubSpot.

• Help improve team processes, technical standards, and code quality 

• Ensure quality and resilience in all phases — from design to deployment.

We’re looking for someone who:

• Is a strong senior backend engineer with experience in building and scaling backend systems.

• Has worked with AI/ML systems or has strong interest in applying AI in practical, production use cases.

• Understands the challenges of building and scaling data pipelines.

• Writes reliable, maintainable, well-tested code and cares deeply about code quality.

• Thrives in a greenfield or ambiguous environment, and enjoys building foundational systems.

• Is excited about empowering internal teams with tools that multiply their impact.

If you’re excited to work on foundational AI infrastructure, shape a new team, and help HubSpot build smarter, more contextual agent experiences, we’d love to hear from you!