Senior Machine Learning Engineer II
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Job Summary
POS-31662
Role Summary
HubSpot is building the next generation of AI experiences across our go-to-market products. Were hiring a Senior Machine Learning Engineer II to join the Flywheel Context (Contacts) team where youll build the context platform layer that powers accurate high-performing AI assistants and agents.
This is a backend-leaning ML engineering role focused on shipping production softwaredesigning systems that help other engineering teams retrieve relevant facts manage long/complex context and evaluate quality at scale. If you love building durable platforms (not just prototypes) this role is for you.
What Youll Do
Design build and operate backend services that power context retrieval and enrichment for AI assistants and agents.
Build platform capabilities for storing searching and retrieving insights and relevant facts across HubSpots GTM data.
Develop systems to manage and compress context when it gets large (e.g. long contact histories high-volume CRM data).
Create tooling that allows other engineering teams to ship assistants/agents faster with consistent APIs and reusable primitives.
Build and maintain evaluation and measurement approaches (offline evals golden datasets automated metrics human review loops) to ensure context quality and answer accuracy.
Collaborate closely with sister platform teams and downstream product engineering teams (your customers) to integrate platform capabilities into real experiences.
Own end-to-end delivery: architecture implementation observability performance reliability and iteration.
Required Qualifications
Strong track record shipping production backend systems as a senior engineer (ownership from design to delivery).
Professional Java experience building maintainable testable services in production (this is core to the role).
Experience implementing ML workflows in production (e.g. retrieval/ranking pipelines feature/data pipelines model/embedding services evaluation frameworks).
Comfort working with data tooling and data-intensive systems (large datasets pipelines and service integrations).
Experience operating software at meaningful scale (e.g. high throughput significant data volume performance and reliability constraints).
Strong engineering fundamentals: system design code quality debugging observability and operational excellence.
Nice-to-Have Qualifications
Experience with search/retrieval/relevance/ranking systems (highly aligned to context work).
Experience with RAG-style systems embeddings vector search or hybrid retrieval strategies.
Familiarity with LLM evaluation patterns (golden sets automated metrics human review) hallucination mitigation and quality measurement.
Experience with distributed systems event-driven architectures or stream processing.
Cloud/platform experience (e.g. Kubernetes AWS/GCP) and running services in production.
Some Python experience (useful but not the primary language).
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:
Senior IC
Key Skills
- Industrial Maintenance
- Machining
- Mechanical Knowledge
- CNC
- Precision Measuring Instruments
- Schematics
- Maintenance
- Hydraulics
- Plastics Injection Molding
- Programmable Logic Controllers
- Manufacturing
- Troubleshooting
About Company
HubSpot develops cloud-based, inbound marketing software that allows businesses to transform the way that they market online.
