Principal Software Engineer Breeze Assistant
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Job Location:
Cambridge, MA - USA
Monthly Salary:
Not Disclosed
Posted on:
Yesterday
Vacancies:
1 Vacancy
Job Summary
POS-31592
About the Team
Breeze Assistant is HubSpots AI-powered System of Action. Our mission is to transform how marketers sales representatives and support professionals work by moving beyond simple chat interfaces to an autonomous proactive assistant that executes GTM (Go-To-Market) workflows.
Unlike traditional search-based AI Breeze Assistant is deeply integrated into the HubSpot CRM. We build the intelligence and infrastructure that allow AI to not just answer questions but to take actionslike preparing for a complex meeting researching prospects across the web and automating multi-step cross-functional tasksall while maintaining the trust and brand voice of our customers.
About the Role
We are seeking a Principal Software Engineer to be the technical anchor for the Breeze Assistant product line. This role is for a builder who thrives at the intersection of robust distributed systems and bleeding-edge Generative AI.
As a Principal Engineer you are not just following a roadmap; you are helping define it by identifying what is possible with the latest LLM capabilities and turning those possibilities into production-grade features. You will balance the need for speed in AI experimentation with the need for scale required to support millions of users.
Key Expectations
- Architectural Leadership for AI Actions: Define the patterns for how AI agents safely and predictably interact with HubSpots CRM and third-party ecosystems (Slack Google Workspace Microsoft 365).
- Rapid GenAI Experimentation: Act as a zero-to-one builder. You stay current with the latest trends in LLMs RAG (Retrieval-Augmented Generation) and Agentic frameworks (like LangGraph or AutoGen) to rapidly prototype and validate new System of Action capabilities.
- Hands-on High-Leverage Contributor: You ship production code. You will lead the development of high-impact initiatives moving from a Jupyter notebook prototype to a petabyte-scale production system with ease.
- System Reliability & Trust: Ensure that GenAI outputs are not just cool but trustworthy. You will drive the strategy around LLM evaluation observability and guardrails to ensure accuracy and data privacy.
- Technical Mentorship & Multiplier: You will elevate the AI fluency of the entire engineering org. Youll mentor senior engineers on prompt engineering model selection and the nuances of building non-deterministic systems.
- Cross-Functional Influence: Partner with Product and AI Research teams to scope opportunities where GenAI can solve real-world GTM friction ensuring our technical bets align with HubSpots broader AI strategy.
- Rapid Domain Fluency: The AI landscape changes weekly. You must be able to dive into a new paper model or framework today and explain its strategic value to the team tomorrow.
What You Bring
- User-First Mindset: You have a track record of building products that people love. You advocate for the end-user in design reviews and are willing to pivot technical strategies if it means a better outcome for the customer.
- Proven Expertise in Distributed Systems: You have experience building and scaling high-throughput low-latency systems with strict reliability requirements.
- GenAI Proficiency: Deep experience with LLM orchestration vector databases and building production-grade RAG pipelines. You understand the trade-offs between different model architectures (GPT-4o Claude open-source models).
- Agentic Thinking: A background in building autonomous or semi-autonomous systems where AI takes actions handles tool-calling and manages complex states.
- A Bias for Action: You prefer a working prototype over a 20-page design doc. You have a habit of turning ambiguity into clear plans and working software.
Product Intuition: You care about the why behind the what. You understand the pain points of sales and marketing professionals and build technology that solves them.
Pay & Benefits
The cash compensation below includes base salary on-target commission for employees in eligible roles and annual bonus targets under HubSpots bonus plan for eligible addition to cash compensation some roles are eligible to participate in HubSpots equity plan to receive restricted stock units (RSUs). Some roles may also be eligible for overtime pay. Individual compensation packages are tailored to your skills experience qualifications and other job-related reasons.
This resource will help guide how we recommend thinking about the range you see. Learn more about HubSpots compensation philosophy.
Benefits are also an important piece of your total compensation package. Explore the benefits and perks HubSpot offers to help employees grow better.
At HubSpot fair compensation practices arent just about checking off the box for legal compliance. Its about living out our value of transparency with our employees candidates and community.
We know the confidence gapand impostor syndrome can get in the way of meeting spectacular candidates so please dont hesitate to apply wed love to hear from you.
If you need accommodations or assistance due to a disability please reach out to us using this form.
At HubSpot we value both flexibility and connection. Whether youre a Remote employee or work from the Office we want you to start your journey here by building strong connections with your team and peers. If you are joining our Engineering team you will be required to attend a regional HubSpot office for in-person onboarding. If you join our broader Product team youll also attend other in-person events such as your Product Group Summit and other gatherings to continue building on those connections.
If you require an accommodation due to travel limitations or other reasons please inform your recruiter during the hiring process. We are committed to supporting candidates who may need alternative arrangements
Massachusetts Applicants: It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.
Germany Applicants: (m/f/d) - link to HubSpots Career Diversitypagehere.
India Applicants: link to HubSpot Indias equal opportunity policy here.
About HubSpot
HubSpot (NYSE: HUBS) is an AI-powered customer platform with all the software integrations and resources customers need to connect marketing sales and service. HubSpots connected platform enables businesses to grow faster by focusing on what matters most: customers.
At HubSpot bold is our baseline. Our employees around the globe move fast stay customer-obsessed and win together. Our culture is grounded in four commitments: Solve for the Customer Be Bold Learn Fast Align Adapt & Go! and Deliver with HEART. These commitments shape how we work lead and grow.
Recognized globally for our award-winning culture by Comparably Glassdoor Fortune and more HubSpot is headquartered in Cambridge MA with employees and offices around the world.
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HubSpot may use AI to help screen or assess candidates but all hiring decisions are always human. More information can be found here. By submitting your application you agree that HubSpot may collect your personal data for recruiting global organization planning and related purposes. Refer to HubSpots Recruiting Privacy Notice for details on data processing and your rights.
Required Experience:
Staff IC
Key Skills
- Continuous Integration
- Docker
- Jenkins
- Python
- System Design
- Agile
- C/C++
- Go
- Systems Engineering
- Software Development
- Java
- Distributed Systems
About Company
HubSpot develops cloud-based, inbound marketing software that allows businesses to transform the way that they market online.
