Synthetic Data Engineer.
St. Louis.
$154,000
median salary, 7% below the national average
$117,000 to $201,000. Last updated April 2026.
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Data points to own the conversation.
A Synthetic Data Engineer in St. Louis earns a median of $154,000 in 2026. That is 7% below the national average. The range runs from $117,000 to $201,000, and where you land depends on your experience, your skills, and how well you negotiate. Synthetic data engineering is a rapidly emerging specialty where salaries are driven by expertise in generative models for data augmentation.
Salary range
Where do you fall?
Salary by experience
The gap between entry and lead level is typically $139,000. Where you land depends on years of experience and what you bring to the table.
Entry (0-2 yrs)
$100,000
to $123,000
Mid (3-5 yrs)
$131,000
to $162,000
Senior (6-9 yrs)
$169,000
to $200,000
Lead (10+ yrs)
$193,000
to $239,000
Salary trend
+5% YoYTotal compensation
Base salary is not the full picture. Equity, bonus, and signing can add $33,000 to the total package.
Base
$154,000
Equity
$18,000
Bonus
$12,000
Signing
$3,000
Estimated total: $187,000
How St. Louis compares
St. Louis, MO
$154,000
Cost of living: 10% below average
National Average
$165,000
St. Louis is $11,000 below
Synthetic Data Engineer salary by city
Salary by role in St. Louis
What you should know
The Synthetic Data Engineer landscape in St. Louis is not what most salary sites will tell you. St. Louis offers one of the most affordable major metro areas in the country, with a strong base in healthcare, financial services, and manufacturing. The region's anchor employers include Boeing, Centene, and Washington University's medical campus. A growing biotech and plant sciences corridor centered on the Cortex Innovation District is attracting new investment and talent. Synthetic data engineering is a rapidly emerging specialty where salaries are driven by expertise in generative models for data augmentation. Experience with privacy-preserving data generation for regulated industries like healthcare and finance commands 15 to 25% premiums. Knowledge of differential privacy and statistical validation of synthetic datasets is highly valued.
Junior synthetic data engineers earn $125,000 to $148,000. Engineers with 2 to 4 years of specialized experience reach $165,000 to $215,000. Senior engineers and technical leads earn $220,000 to $290,000, while directors of synthetic data programs at large enterprises can command $300,000 to $380,000. In St. Louis, cost of living sits near the national average, so the numbers you see are roughly what you keep.
Base salary is not the full picture. Startups in the synthetic data space offer equity packages of 0.1 to 0.5% that can be worth significantly more than base salary if the company succeeds. Established tech firms offer RSUs worth 20 to 35% of base salary plus bonuses of 10 to 20%. And on the tax side: missouri's top income tax rate is about 4.8%, and St. Louis City adds a 1% earnings tax. The low base cost of living means your after tax salary still stretches further than in most metros. When someone quotes you $154,000, ask what the total package looks like. The gap between base and total comp is where real money hides.
On negotiation: Emphasize your willingness to work in person at Cortex or the BJC campus. St. Louis employers offer higher packages for candidates who commit to the local innovation hubs. The range for Synthetic Data Engineers in St. Louis runs from $117,000 to $201,000. That is not a narrow window. Where you land inside it depends almost entirely on whether you negotiate and how well you prepare.
Sources: SEC filings, H-1B LCA (DOL), BLS OES, 50+ job posting platforms. COL: BEA Regional Price Parities (2025). Data verified by Justin Bartak, Founder & Chief AI Officer. Last verified April 8, 2026. Full methodology
Considering a related role?
- A Robotics AI Engineer in St. Louis earns $153,000 (1% less)
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Common questions.
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