LLM Fine-Tuning Engineer Salary.
Across 30 U.S. cities.
$185,000
national median salary
$140,000 to $240,000. Last updated April 2026.
Highest Paying
$248,000
San Jose, CA
Best Purchasing Power
$193,000
Boston, MA
Lowest Paying
$139,000
Charleston, WV
Salary data sourced from SEC filings, H-1B Labor Condition Applications (DOL), Bureau of Labor Statistics Occupational Employment and Wage Statistics, and aggregated job postings across 50+ platforms. Ranges reflect 25th to 75th percentile for full-time positions. Cost-of-living adjustments use Bureau of Economic Analysis Regional Price Parities (2025 index). Last updated April 2026.
The average LLM Fine-Tuning Engineer salary in the United States is $185,000 in 2026, with the full range spanning $140,000 at the 25th percentile to $240,000 at the 75th. San Jose pays the most at $248,000, while Boston offers the best purchasing power after cost-of-living adjustments. Deep knowledge of parameter efficient fine tuning methods like LoRA, QLoRA, and adapter layers drives compensation.
LLM Fine-Tuning Engineer salary by city
What you should know
Deep knowledge of parameter efficient fine tuning methods like LoRA, QLoRA, and adapter layers drives compensation. Engineers who can optimize training runs for cost and quality while managing GPU infrastructure are highly sought. Experience with evaluation frameworks, dataset curation, and domain specific model adaptation adds significant salary premiums.
Junior fine tuning engineers start at $120,000 to $150,000. Mid level engineers with production deployment experience earn $165,000 to $210,000. Senior engineers reach $210,000 to $270,000. Principal engineers at leading AI companies can exceed $350,000 in total compensation with equity.
Equity at AI startups typically adds 20 to 40% of total compensation. Performance bonuses of 15 to 25% are standard. Signing bonuses of $25,000 to $75,000 are common. Benefits frequently include cloud compute credits and conference attendance budgets.