Top 21 senior ml engineer i Jobs

Sr. Machine Learning Engineer I
HubSpot —Remote
- $165,500 - $248,300 a year
- Remote
- 5 years
- Senior level
Senior Data and Software Engineer I (API) (32_2026.1)
Affinity Solutions —New York, NY
- $145,000 - $160,000 a year
- Full-time
- Remote
- 6 years
- Senior level
- Paid holidays
- Health insurance
Sr. Software Engineer I
Invoca —San Francisco, CA
- $127,000 - $191,000 a year
- On call
- Remote
- Travel
- Senior level
- Paid holidays
- Health insurance
Quick Apply
Senior Software Engineer 1, ML
Dotdash Meredith —Remote
- $170,000 - $195,000 a year
- Full-time
- Remote
- Computer Science
- 5 years
- System design
- Commuter assistance
- Paid parental leave
Senior Machine Learning Engineer I // II
Signifyd —Denver, CO
- $140,000 - $190,000 a year
- Remote
- Computer Science
- Research
- Master's degree
- Paid parental leave
- Disability insurance
Senior Software Engineer, 1
Dotdash Meredith —Remote
- $125,000 - $150,000 a year
- Full-time
- Remote
- Computer science
- Computer Science
- 5 years
- Commuter assistance
- Paid parental leave
11d
Sr. Software Engineer I (6521)
MetroStar —Tysons, VA
- $121,000 - $151,000 a year
- Full-time
- Remote
- Computer Science
- Mid-level
- 3 years
- Paid training
- Paid holidays
Quick Apply
Sr. AI/ML Engineer I (6407)
MetroStar —Washington, DC
- $133,000 - $147,000 a year
- Full-time
- Computer Science
- Analysis skills
- US work authorization
- Paid training
- Paid holidays
Quick Apply
Senior Engineer I, Digital Products
Phillips 66 —Bartlesville, OK
- $141,300 - $172,700 a year
- Full-time
- System design
- 3 years
- Doctor of Philosophy
- Health savings account
- Health insurance
Machine Learning Engineer II / Senior Machine Learning Engineer I, Physical Sciences
Lila Sciences —Cambridge, MA
- $128,000 - $198,000 a year
- Computer science
- Computer Science
- Bachelor of Science
- Commuter assistance
- Paid parental leave
Senior AI Engineer, IT Solutions 1
Celestica —New Hampshire
- Hybrid work
- Azure
- Computer Science
- 11+ years
Senior Software Engineer I, Computational Geometry & BIM
ICON —Austin, TX
- Computer science
- Computer Science
- Bachelor of Science
Principal Data Scientist I
LexisNexis —Raleigh, NC
- $118,300 - $219,800 a year
- Full-time
- Computer Science
- SQL
- Doctor of Philosophy
7d
Senior ML Engineer I
Waystar —Atlanta, GA
- Full-time
- Computer Science
- System design
- Research
- Paid parental leave
- Paid holidays
Principal Data Scientist I
RELX —Raleigh, NC
- $118,300 - $219,800 a year
- Full-time
- Computer Science
- SQL
- Doctor of Philosophy
7d

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Sr. Machine Learning Engineer I
HubSpot —Remote
Hands-on experience working with large language models in production: prompt engineering, fine-tuning, evaluation, inference optimization.
$165,500 - $248,300 a year

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Sr. Machine Learning Engineer I

HubSpot -
Remote

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Job Details

$165,500 - $248,300 a year

Benefits

Qualifications

AI models
Design of experiments
AI platforms (beyond public GPTs)
Computational framework
Prompt engineering
Production systems
Machine intelligence
Developing large-scale AI models
Model training
Machine learning (ML) fundamentals
Model evaluation
Machine learning frameworks

Full Job Description

Engineering

Remote - USA

POS-23565

About the Role

HubSpot's Agent Platform team is building Breeze Studio, our custom agent creation product that lets customers define, deploy, and improve AI agents that work on their behalf inside HubSpot. As a Machine Learning Engineer on the Agent Orchestration ML team, you'll own the models and systems that determine whether those agents are any good.

This is core ML work: prompt optimization, LLM evaluation, model fine-tuning, and inference infrastructure. You'll work directly with LLM vendors like OpenAI, run model performance experiments, and ship improvements that customers notice. The team is small (currently 2 MLEs), the surface area is large, and the scope is yours to define.

Custom agents are central to HubSpot's strategic direction as an AI-first CRM. This is not a supporting role.

What You'll Do

Design and run experiments to improve agent quality: better tool use, better reasoning, better outputs, using frameworks like DSPy and VLLM
Build and maintain evaluation infrastructure to measure what's working and catch regressions before customers do
Optimize LLM inference: latency, cost, model routing, and quality tradeoffs
Partner with product teams on model selection and performance benchmarking
Work closely with product engineers and PMs to translate customer quality problems into ML hypotheses and solutions
Own models end-to-end: from research and experimentation to production deployment

What We're Looking For

5+ years of experience in a dedicated ML Engineer role (not ML-adjacent software engineering)
Strong Python skills; experience with PyTorch, VLLM, DSPy or similar LLM optimization frameworks
Hands-on experience working with large language models in production: prompt engineering, fine-tuning, evaluation, inference optimization
Ability to move from ambiguous problem ("this agent isn't performing well") to experimental design to shipped improvement
Comfort working with limited supervision in an early-stage product environment

Why This Role

Autonomy with impact: Small team, large surface area. Your work directly affects the quality of agents that hundreds of customers build.
Strategic positioning: Breeze Studio is how HubSpot competes in the AI-native CRM market. Agent quality is the bottleneck while you'll help own.
Interesting ML problems: Evaluating open-ended agent behavior, optimizing for latency and quality simultaneously, working at the frontier of LLM capabilities.

Pay & Benefits

The cash compensation below includes base salary, on-target commission for employees in eligible roles, and annual bonus targets under HubSpot’s bonus plan for eligible roles. In addition to cash compensation, some roles are eligible to participate in HubSpot’s 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.

Benefits are also an important piece of your total compensation package.

At HubSpot, fair compensation practices aren’t just about checking off the box for legal compliance. It’s about living out our value of transparency with our employees, candidates, and community.

Annual Cash Compensation Range:

$165,500—$248,300 USD

We know the confidence gap and impostor syndrome can get in the way of meeting spectacular candidates, so please don’t hesitate to apply — we’d love to hear from you.

At HubSpot, we value both flexibility and connection. Whether you’re 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, you’ll 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.

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. HubSpot's 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.

We’re building a company where people can do their best work. We focus on brilliant work, not badge swipes. By combining clarity, ownership, and trust, we create space for big thinking and meaningful progress. And we know that when our employees grow, our customers do too.

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.

Explore more:

HubSpot Careers
Life at HubSpot on Instagram

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. We may use CLEAR ID Verification during the hiring process to confirm your identity and help maintain a safe, secure, and trusted experience for all candidates. Refer to HubSpot's Recruiting Privacy Notice for details on data processing and your rights.

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senior ml engineer i jobs

Sr. Machine Learning Engineer I

Senior Data and Software Engineer I (API) (32_2026.1)

Sr. Software Engineer I

Senior Software Engineer 1, ML

Senior Machine Learning Engineer I // II

Senior Software Engineer, 1

Sr. Software Engineer I (6521)

Sr. AI/ML Engineer I (6407)

Senior Engineer I, Digital Products

Machine Learning Engineer II / Senior Machine Learning Engineer I, Physical Sciences

Senior AI Engineer, IT Solutions 1

Senior Software Engineer I, Computational Geometry & BIM

Principal Data Scientist I

Senior ML Engineer I

Principal Data Scientist I

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