ZoomInfo Technologies LLC

ZoomInfo Technologies LLC

Principal Machine Learning Engineer

Waltham, Massachusetts, United States · Principal

Sponsorship not specified$193k-$303kDetected 15 days ago
PythonSQLMachine LearningPyTorchNLPLLMsStatistics

Stay score

odds of building a lasting career here

61Sponsors, lottery-bound
Cap-exempt (no lottery)0
Sponsors this role90
Entry-level history0
PERM / green-card track0
Lottery odds (Level IV)94
Fits your clock70

Sponsors, but it's cap-subject — you still face the weighted lottery (~61% per draw at Level IV). Good if you win; have a cap-exempt backup on your list.

Lottery odds assume a STEM candidate.

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H-1B wage level

the lottery is wage-weighted — each level is one more entry

Level IV · 4×
Level I$114,2751 entry
Level II$138,2372 entries
Level III$162,1983 entries
Level IV$186,1604 entries

This range already reaches Level IV — the maximum four lottery entries.

DOL prevailing wage, 2026-27 wage year · Software Developers (15-1252) · Boston-Cambridge-Newton, MA-NH. Wage level is derived by USCIS from the offered wage, occupation and worksite; the occupation shown is inferred from the job title.

Employer immigration record

from this employer's Department of Labor filings

Green-card follow-through: 100%

Of 8 labor certifications old enough to have been used, 0 expired without the employer filing the next step. Median time from filing to decision: 511 days.100% of their filings were for a worker who already held the job.Only certifications past the 180-day window are counted — recent ones cannot have expired yet.

Files H-1B transfers

6 transfer filings in the last year, covering 6 workers. Median labor-condition decision: 7 days. An employer that already files transfers is one that can take over an existing H-1B.

Sourced from Department of Labor LCA, PERM and prevailing-wage disclosure data. Employer matching is by name, so figures may be split across an employer's legal entities. Absence of a filing means none appears in our copy of the data, not that none exists.

Community outcomes

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About the role

  • We move fast, think boldly, and empower you to do the best work of your life.
  • You'll be surrounded by teammates who care deeply, challenge each other, and celebrate wins.
  • With tools that amplify your impact and a culture that backs your ambition, you won't just contribute.

Responsibilities

  • You will frame and ship problems nobody has framed yet, such as extraction for companies with no public footprint or semantic intent at web scale, deciding what not to build as deliberately as what to build.
  • You will lead design reviews, mentor senior engineers, shape hiring, and represent the team's technical judgment to product and leadership.

Requirements

  • You have made cost and capacity decisions for model training and serving, including when to self-host, distill, or call a hosted model, with cost tracked per unit of work.
  • You are hands-on in production Python and strong SQL with distributed data processing experience, and you use AI coding tools daily with rigorous review of their output.
  • You have experience with ranking and retrieval, including embeddings, learned re-ranking, and metrics such as recall@k, MRR, and nDCG.
  • You have trained and served open-weight models in PyTorch or an equivalent framework, including GPU capacity planning.
  • You have built user memory or context systems for agents, or defended LLM systems against adversarial inputs and prompt injection.
  • Must-Have:
  • You have set technical direction as an individual contributor for a problem area spanning more than one team, with the resulting machine learning systems in production and owned after launch - depth of impact matters more than years or past titles.
  • You bring breadth across classical machine learning on large, messy tabular data, applied statistics, language processing at scale, and LLM agents or multi-step systems, with recognized depth in at least one.
  • You have defined and driven adoption of evaluation standards beyond your own team for systems with no single right answer, including LLM judges validated against human labels and results reported with their limits.
  • You have a track record of changing how a group builds or measures - for example, introducing a baseline or review practice that other teams now use.
  • Preferred:
  • You bring entity resolution, knowledge graph, or web-scale information extraction experience on messy, real-world data.
  • #LI-Remote
  • Actual compensation offered will be based on factors such as the candidate's work location, qualifications, skills, experience and/or training. Your recruiter can share more information about the specific salary range for your desired work location during the hiring process. We want our employees and their families to thrive.

Skills

  • ZoomInfo is where careers accelerate.

Compensation

  • Actual compensation offered will be based on factors such as the candidate's work location, qualifications, skills, experience and/or training.

Company info

  • ZoomInfo (NASDAQ: GTM) is the Go-To-Market Intelligence Platform that empowers businesses to grow faster with AI-ready insights, trusted data, and advanced automation.
  • Its solutions provide more than 35,000 companies worldwide with a complete view of their customers, making every seller their best seller.
  • ZoomInfo is committed to protecting your privacy when you apply for jobs with us.
  • ZoomInfo may use a software-based assessment as part of the recruitment process.
  • More information about this tool, including the results of the most recent bias audit, is available here.
  • ZoomInfo is proud to be an equal opportunity employer, hiring based on qualifications, merit, and business needs, and does not discriminate based on protected status.
  • We also consider qualified candidates with criminal histories in accordance with legal requirements.
  • For 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.
  • ZoomInfo does not administer lie detector tests to applicants in any location.
  • We welcome all applicants and are committed to providing equal employment opportunities regardless of sex, race, age, color, national origin, sexual orientation, gender identity, marital status, disability status, religion, protected military or veteran status, medical condition, or any other characteristic protected by applicable law.
  • For Massachusetts Applicants: It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment.
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This listing is sourced directly from ZoomInfo Technologies LLC's careers page and normalized into a canonical job model.