Research Engineer
- Salary
- $160,000 - $200,000 per year
- Level
- Mid
Not stated in the posting: work type, visa.
Open. First seen 23 October 2026.
About the role
About the company
Our client is a fast-growing software company.
The role
Raydar is recruiting for this role on behalf of our client. Apply machine learning research to real production problems, taking loosely defined questions, scoping them and shipping working solutions. The work spans model evaluation, model adaptation and autonomous software agents, in close partnership with backend engineers.
What you'll do
- Build evaluation suites to measure and improve model performance on domain-specific tasks.
- Raise the quality of language models using a mix of input design, additional training, information lookup and step-by-step reasoning techniques.
- Develop and refine agents that operate web and desktop software autonomously.
- Turn feedback from live user workflows into well-bounded research problems and deploy the resulting solutions.
- Work with backend engineers to move research improvements into production quickly.
Requirements
What we're looking for
- 3+ years of experience, with research exposure (internship, academic project or industry role) in machine learning, NLP, language models or reinforcement learning.
- A record of taking research from ambiguity into production rather than staying in notebooks or papers.
- Solid depth in applied language model work, with hands-on evaluation and model improvement experience.
- Strong Python skills and the ability to ship code into production systems.
- A BS or MS in computer science, math or machine learning.
- High agency: able to scope ambiguous problems independently and drive them to completion.
- Genuine motivation to work in an early-stage startup with a very fast pace.
- Ability to work on-site five days a week.
Bonus points
- Production experience with model adaptation, evaluation or agent-based systems.
- A published research paper or notable academic machine learning project.
- Infrastructure or distributed systems experience.
Benefits
Compensation and benefits
- Base salary: USD 160,000 to 200,000 per year
- Equity
Location and work model
- Bay Area, CA, United States
- On-site, 5 days per week in office
- Full-time
What this role asks for
Particular to this role
NLP
Rare in Raydar's other 299 open postings.
Standard for software engineering roles
Python
Common in software engineering postings at any company.
Compared with Raydar's other open jobs.
Other openings for this role
8 open postings for this role in San Francisco, first posted 23 October 2026. The company is likely hiring for more than one position. None has been taken down and posted again.
- 28 October 2026 – open
- 23 October 2026 – open
- 23 October 2026 – open
- 23 October 2026 – open
- 23 October 2026 – open
- 23 October 2026 – open
- 23 October 2026 – open (this posting)
- 23 October 2026 – open
Salary context
44 other open postings titled Research Engineer state a salary: median USD 190,000 to USD 300,000 a year.
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