Multimodal AI Applications Engineer.

Where do you fall?

Salary trend

Estimated total: $181,000

Here is what the Multimodal AI Applications Engineer market actually looks like in St. Louis. 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. Expertise in building systems that process and generate across text, image, audio, and video modalities drives compensation. Engineers with production experience integrating vision-language models, audio understanding, and cross-modal retrieval earn premiums. Deep understanding of transformer architectures and attention mechanisms across modalities is essential.

Junior multimodal engineers start at $110,000 to $130,000 integrating pre-trained models. Mid-level engineers building custom multimodal pipelines reach $150,000 to $175,000. Senior engineers architecting end-to-end multimodal systems earn $185,000 to $230,000. Staff-level roles at frontier labs exceed $300,000 in total compensation. 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. Equity at multimodal AI companies adds $30,000 to $100,000 annually. Bonuses of 12% to 18% are standard. Compute budgets for experimentation are generous. Conference travel and publication incentives support career growth. 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 $150,000, 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 Multimodal AI Applications Engineers in St. Louis runs from $116,000 to $185,000. That is not a narrow window. Where you land inside it depends almost entirely on whether you negotiate and how well you prepare.

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