Late last year, an artificial intelligence engineer at Amazon was wrapping up the work week and getting ready to spend time with some friends visiting from out of town. Then, a Slack message popped up. He suddenly had a deadline to deliver a project by 6 a.m. on Monday.

There went the weekend. The AI engineer bailed on his friends, who had traveled from the East Coast to the Seattle area. Instead, he worked day and night to finish the job.

But it was all for nothing. The project was ultimately “deprioritized,” the engineer told CNBC. He said it was a familiar result. AI specialists, he said, commonly sprint to build new features that are often suddenly shelved in favor of a hectic pivot to another AI project.

The engineer, who requested anonymity out of fear of retaliation, said he had to write thousands of lines of code for new AI features in an environment with zero testing for mistakes. Since code can break if the required tests are postponed, the Amazon engineer recalled periods when team members would have to call one another in the middle of the night to fix aspects of the AI feature’s software.

AI workers at other Big Tech companies, including Google and Microsoft, told CNBC about the pressure they are similarly under to roll out tools at breakneck speeds due to the internal fear of falling behind the competition in a technology that, according to Nvidia CEO Jensen Huang, is having its “iPhone moment.”

The tech workers spoke to CNBC mostly on the condition that they remain unnamed because they weren’t authorized to speak to the media. The experiences they shared illustrate a broader trend across the industry, rather than a single company’s approach to AI.

They spoke of accelerated timelines, chasing rivals’ AI announcements and an overall lack of concern from their superiors about real-world effects, themes that appear common across a broad spectrum of the biggest tech companies — from Apple to Amazon to Google.

Engineers and those with other roles in the field said an increasingly large part of their job was focused on satisfying investors and not falling behind the competition rather than solving actual problems for users. Some said they were switched over to AI teams to help support fast-paced rollouts without having adequate time to train or learn about AI, even if they are new to the technology.

A common feeling they described is burnout from immense pressure, long hours and mandates that are constantly changing. Many said their employers are looking past surveillance concerns, AI’s effect on the climate and other potential harms, all in the name of speed. Some said they or their colleagues were looking for other jobs or switching out of AI departments, due to an untenable pace.

This is the dark underbelly of the generative AI gold rush. Tech companies are racing to build chatbots, agents and image generators, and they’re spending billions of dollars training their own large language models to ensure their relevance in a market that’s predicted to top $1 trillion in revenue within a decade.

Tech’s megacap companies aren’t being shy about acknowledging to investors and employees how much AI is shaping their decision-making.

Microsoft Chief Financial Officer Amy Hood, on an earnings call earlier this year, said the software company is “repivoting our workforce toward the AI-first work we’re doing without adding material number of people to the workforce,” and said Microsoft will continue to prioritize investing in AI as “the thing that’s going to shape the next decade.”

Meta CEO Mark Zuckerberg spent much of his opening remarks on his company’s earnings call last week focused on AI products and services and the advancements in its large language model called Llama 3.

“This leads me to believe that we should invest significantly more over the coming years to build even more advanced models and the largest scale AI services in the world,” Zuckerberg said.

At Amazon, CEO Andy Jassy told investors last week that the “generative AI opportunity” is almost unprecedented, and that increased capital spending is necessary to take advantage of it.

“I don’t know if any of us has seen a possibility like this in technology in a really long time, for sure since the cloud, perhaps since the Internet,” Jassy said.

While companies such as Alphabet and Amazon continue to downsize their total headcount, they’re aggressively hiring AI experts and pouring resources into building their models and developing features for consumers and businesses.

Eric Gu, a former Apple employee who spent about four years working on AI initiatives, including for the Vision Pro headset, said that toward the end of his time at the company, he felt “boxed in.” 

“Apple is a very product-focused company, so there’s this intense pressure to immediately be productive, start shipping and contributing features,” Gu said. He said that even though he was surrounded by “these brilliant people,” there was no time to really learn from them.

“It boils down to the pace at which it felt like you had to ship and perform,” said Gu, who left Apple a year ago to join AI startup Imbue, where he said he can work on equally ambitious projects but at a more measured pace.  

Apple declined to comment.

An AI engineer at Microsoft said the company is engaged in an “AI rat race.”

When it comes to ethics and safeguards, he said, Microsoft has cut corners in favor of speed, leading to rushed rollouts without sufficient concerns about what could follow. The engineer said there’s a recognition that because all of the large tech companies have access to most of the same data, there’s no real moat in AI.

Microsoft didn’t provide a comment.

Morry Kolman, an independent software engineer and digital artist who has worked on viral projects that have garnered more than 200,000 users, said that in the age of rapid advancement in AI, “it’s hard to figure out where is worth investing your time.”

“And that is very conducive to burnout just in the sense that it makes it hard to believe in something,” Kolman said, adding, “I think that the biggest thing for me is that it’s not cool or fun anymore.”

At Google, an AI team member said the burnout is the result of competitive pressure, shorter timelines and a lack of resources, particularly budget and headcount. Although many top tech companies have said they are redirecting resources to AI, the required headcount, especially on a rushed timeline, doesn’t always materialize. That is certainly the case at Google, the AI staffer said. 

The company’s hurried output has led to some public embarrassment. Google Gemini’s image-generation tool was released and promptly taken offline in February after users discovered historical inaccuracies and questionable responses. In early 2023, Google employees criticized leadership, most notably CEO Sundar Pichai, for what they called a “rushed” and “botched” announcement of its initial ChatGPT competitor called Bard.

The Google AI engineer, who has over a decade of experience in tech, said she understands the pressure to move fast, given the intense competition in generative AI, but it’s all happening as the industry is in cost-cutting mode, with companies slashing their workforce to meet investor demands and “increase their bottom line,” she said. 

There’s also the conference schedule. AI teams had to prepare for the Google I/O developer event in May 2023, followed by Cloud Next in August and then another Cloud Next conference in April 2024. That’s a significantly shorter gap between events than normal, and created a crunch for a team that was “beholden to conference timelines” for shipping features, the Google engineer said.

Google didn’t provide a comment for this story.

The sentiment in AI is not limited to the biggest companies.

An AI researcher at a government agency reported feeling rushed to keep up. Even though the government is notorious for moving slower than companies, the pressure “trickles down everywhere,” since everyone wants to get in on generative AI, the person said.

And it’s happening at startups.

There are companies getting funded by “really big VC firms who are expecting this 10X-like return,” said Ayodele Odubela, a data scientist and AI policy advisor.

“They’re trying to strike while the iron is hot,” she said.

Odubela underscored the ethical risks of inadequate training for AI workers and with rushing AI projects to keep up with competition. She pointed to the problems with Google Gemini’s image creator when the product hit the market in February. In one instance, a user asked Gemini to show a German soldier in 1943, and the tool depicted a racially diverse set of soldiers wearing German military uniforms of the era, according to screenshots viewed by CNBC.

“The biggest piece that’s missing is lacking the ability to work with domain experts on projects, and the ability to even evaluate them as stringently as they should be evaluated before release,” Odubela said, regarding the current ethos in AI.

At a moment in technology when thoughtfulness is more important than ever, some of the leading companies appear to be doing the opposite.

“I think the major harm that comes is there’s no time to think critically,” Odubela said.