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Android Engineer, Payments

Android Engineer, Payments

xAIPalo Alto, CA, US
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Job Description

Job Description

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 looking for an exceptional Android Engineer for a new payments platform being built at X which serves 600 million+ monthly users. This is a high-priority role responsible for protecting users and the platform from fraud, abuse, and risk.

As an Android engineer on the team, you'll help shape the user experience and mobile architecture of these new payments services from the ground up. You'll work closely with the design and backend teams to build secure, responsive, and elegant payment services directly into the X Android app. This is a rare opportunity to define how users engage with money in a social context—unlocking new digital experiences powered by speed, trust, and simplicity.

What You'll Do

  • Design and build high-quality, scalable Android features for payments, wallets, identity, and more
  • Collaborate closely with backend and design to deliver seamless end-to-end user flows
  • Ensure reliability, performance, and security of payments transactions on mobile
  • Contribute to the architectural evolution of X's Android codebase with a focus on modularity and reusability
  • Write clean, testable code and maintain high engineering standards across development and release
  • Participate in code reviews, technical discussions, and roadmap planning

Who You Are

  • Experienced : 5+ years building Android applications in Kotlin, with deep understanding of Android SDK and modern Android architecture components
  • Product-minded : You care about user experience, polish, and performance—especially in sensitive financial contexts
  • Security- and privacy-conscious : You understand how to handle sensitive user data securely and responsibly
  • Builder mentality : You're energized by zero-to-one problems and thrive in fast-paced, iterative environments
  • Collaborative communicator : You work well with cross-functional teams and clearly explain technical trade-offs

    • Bonus

  • Experience working on mobile payments, digital wallets, or identity verification flows
  • Familiarity with mobile security best practices (e.g., secure storage, encryption, biometric auth)
  • Comfortable contributing across mobile architecture and backend APIs

    • Tech Stack (Optional)

  • Kotlin
  • Golang
  • Postgres
  • Kafka
  • Memcached

    • 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 30 minute phone interview, during which a member of our team will ask technical questions. If you clear the phone interview, you will proceed to next steps :

  • Coding assessment in a language of your choice.
  • Systems design : Translate high-level requirements into a scalable, fault-tolerant service.
  • Project deep-dive : Present your past exceptional work to a small audience.
  • Meet and greet with the wider team.

    • Our goal is to finish the main process within one week.

    Location

    The role is based in Palo Alto. Candidates are expected to be located near the Bay Area or open to relocation.

    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.

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    Android Engineer • Palo Alto, CA, US