OKX

1 week ago

Senior / Staff Software Engineer, Mobile — Core (Account & Risk)

✓ Verified Job

Canonical indexed version, validated from employer's careers page.

Source: Company careers pageValidated by: Fursa AI

Last checked: 16 hours agoStatus: Live

Job Summary

Own end-to-end mobile account-system subsystems for a CeFi platform, spanning authentication, MFA, passkeys/WebAuthn, session/device trust, and account registration/recovery. Build secure, low-friction flows at millions-of-DAU scale while partnering with risk and security teams to ship mobile defenses. Create an AI-native engineering practice with agentic workflows, evals, guardrails, and CI integration, and raise engineering quality through strong design and code review.

Location: Hong Kong

Workplace: Onsite

Employment Type: Full time

Job Function: Software Engineering

Seniority: Mid level

Key Responsibilities

•Own account-system subsystems end-to-end, including architecture, tradeoffs, and long-term evolution for authentication, MFA, passkey/WebAuthn, session/device trust, and account recovery.
•Design secure, low-friction authentication/registration flows that work reliably at millions-of-DAU scale.
•Partner with risk and security teams to translate threat models into shipped mobile defenses.
•Build an AI-native engineering practice with automated development workflows (agents, evals, guardrails) and CI integration to improve delivery quality and efficiency.
•Raise the bar through design and code review, and at Staff level, set technical direction and drive cross-team decisions shaping the account platform.

Pay and Benefits

Perks:Learning BudgetHealth InsuranceMeal AllowanceWellness Stipend

Key Requirements

•Deep, hands-on experience building native iOS and/or Android, with strong CS fundamentals.
•Experience with a cross-platform/shared business-logic layer; Rust + UniFFI is valued (KMP, Flutter, or React Native also transfer).
•Fluency in at least one of: Swift, Kotlin, Rust, Objective-C, Java, or JavaScript.
•Architecture experience with large-scale mobile apps, applying maintainable design patterns from requirements through production.
•Hands-on mobile authentication & security experience (OAuth/OIDC, MFA, secure storage, biometrics) and strong familiarity with Passkey/WebAuthn/FIDO2.

Experience:CryptoFintechCeFi

Skills:MentoringCode reviewCross-team collaborationAbility to handle ambiguityRaising team standards

Languages:English

Tech Stack:IOSAndroidRustUniFFIKMPFlutterReact NativeSwiftKotlinObjective-CJavaJavaScriptPasskeyWebAuthnFIDO2OAuthOIDCMFAKeychainKeystore

Eligibility

Work Authorization:Authorization required. Sponsorship not provided.

Company Brief

OKX

Global cryptocurrency exchange and Web3 technology provider offering spot and derivatives trading, custody, wallet services, and blockchain infrastructure to retail and institutional users worldwide.

Industry: Trading Platforms

Company Size: Enterprise (1,001+ employees)

Growth: Established Company

Headquarters: Victoria, Seychelles

Founded: 2017

Website LinkedIn

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OKX