xAI

Understand the Universe

x.ai

xAI

Understand the Universe

x.ai

HQRemote

Team Size5262

Open Jobs52

Total Funding$37B

Latest FundraiseUnknown

TL;DR

Founded: 2023

Founder / CEO: Elon Musk

Core product: Grok chatbot (Grok model family) and related generative tools

Notable funding: $6B Series C (May 2024); $20B Series E announced (Jan 2026)

Employees (reported): 5262

Company Overview

Problem Domain

Artificial intelligence / conversational and generative AI

Founded

2023

Industry

Technology, Information and Internet

Funding Track Record

Series C- 2024-05-26

$6 billion

Reported participation from a16z, Sequoia, Valor, BlackRock, Fidelity, Kingdom Holdings, Lightspeed, MGX, Morgan Stanley, OIA, QIA among others.

Series E- 2026-01-06

$20 billion

Company announced Series E with named investors including Valor Equity Partners, Fidelity, Qatar Investment Authority and others.

Investor Signal

“Includes participation from major institutional and strategic investors such as Andreessen Horowitz (a16z), Sequoia Capital, Valor Equity Partners, Fidelity, BlackRock, Kingdom Holdings, Morgan Stanley, Qatar Investment Authority, Nvidia and Cisco.”

Founders

What we do

Join the Team

Mobile iOS Engineer

On-SitePalo Alto, CA, US

On-Site • Palo Alto, CA, US

Related Companies

Company	HQ	Industry	Total Funding
Magic	🇺🇸US	Software	$465M
Essential AI	🇺🇸San Francisco, US	Data and AnalyticsDeepTechEducationInformation TechnologySoftware	$65M
Reflection AI	🇺🇸US	DeepTech	-
Parallel Web Systems	🇺🇸Stanford, US	Data and AnalyticsDeepTechInformation TechnologySoftware	$160M
Liquid AI	🇺🇸US	Data and AnalyticsDeepTechInformation TechnologySoftware	-

About XAI xAI's mission is to create AI systems that can accurately understand the universe and aid humanity in its pursuit of knowledge.

Our team is small, highly motivated, and focused on engineering excellence. This organization is for individuals who appreciate challenging themselves and thrive on curiosity.

We operate with a flat organizational structure. All employees are expected to be hands-on and to contribute directly to the company's mission. Leadership is given to those who show initiative and consistently deliver excellence. Work ethic and strong prioritization skills are important.

All engineers are expected to have strong communication skills. They should be able to concisely and accurately share knowledge with their teammates.

About The Role We're seeking an exceptional iOS engineer to join a small, high-impact team dedicated to creating the world's most valuable AI application, judged by the impact it delivers to users. You'll shape cutting-edge mobile experiences, blending technical mastery with product brilliance. An ideal candidate meets at least the following requirements:

Expert in Swift, with deep knowledge of UIKit and SwiftUI.
Proficient in performance optimizationâ€”memory, CPU, GPUâ€”using low-level tools to deliver blazing-fast systems.
Experienced in designing and shipping intuitive, pixel-perfect mobile UIs that redefine how users interact with AI.
Skilled in concurrency and reactive programming (Combine) for responsive, real-time apps.
Built high-throughput integrations with APIs (REST, gRPC) or AI model outputs, ensuring seamless data flow.
Capable of owning complex features end-to-end, from architecture to App Store deployment, with a focus on speed and scalability.

Additionally, experience in any of the following may set you apart:

Deep expertise in the Apple ecosystem and related development tools.
Rust for working with our backend components.
AVFoundation for real-time audio processing.
Track record of shipping standout apps or standout features within apps.

What You'll Do

Dream up and craft delightful, intuitive user experiences that redefine how people interact with AI on mobile.
Obsess over every pixel, animation, and interaction, ensuring the experience feels magical and seamless.
Build blazing-fast, highly performant systems where every millisecond counts.
Drive technical and product decisions, collaborating with AI researchers and engineers to deploy state-of-the-art models globally.

Who You Are

Technically ExceptionalYou possess deep expertise in iOS development, particularly with Swift. We seek individuals who operate at the highest levels of their craft.
EfficientYou excel at delivering results swiftly, often in a fraction of the time others require. Speed is a core value at xAIâ€”we must act decisively to succeed.
Hardworking
High AgencyYou don't wait for directionâ€”you take initiative and make things happen.
Product-MindedYou have a sharp product sense, with an ability to empathize with users, anticipate their needs, and translate that into features that delight and deliver value.

Location You can work out of xAI's Palo Alto, London or NYC offices.

Interview Process After Submitting Your Application, The Team Reviews Your CV And Statement Of Exceptional Work. If Your Application Passes This Stage, You Will Be Invited To a 15 Minute Interview ("phone Interview") During Which a Member Of Our Team Will Ask Some Basic Questions. If You Clear The Initial Phone Interview, You Will Enter The Main Process, Which Consists Of 3 Technical Interviews

Initial Interview with a senior member of the iOS Team.
Technical Interviews: Demonstrate practical skills in live problem-solving sessions.
Final Interview.

Our goal is to finish the main process within one week. All interviews will be conducted via Google Meet.

Annual Salary Range $180,000 - $440,000 USD

Benefits Base salary is just one part of our total rewards package at xAI, which also includes equity, comprehensive medical, vision, and dental coverage, access to a 401(k) retirement plan, short & long-term disability insurance, life insurance, and various other discounts and perks.

xAI is an equal opportunity employer. For details on data processing, view our Recruitment Privacy Notice

xAI

xAI