Sr Software Engineer, Front End

OKX; San Jose (CA); On-site; USD 178,888 - 268,333; Full time

Benefits offered by this job

Wellness and meal allowances

Comprehensive healthcare

Education subsidy

Team building programs

Job summary

OKX is seeking a frontend engineer to own and ship fiat deposits/withdrawals, Simple Buy/Sell, and Cards & Pay experiences used by millions. You will build AI-native infrastructure, instrument features for data-driven decisions, and raise frontend standards across a cross‑regional team in the US and APAC.

The role emphasizes web performance, security, and scalable UI systems, with collaboration across product, design, and backend teams. Mandarin Chinese is required for APAC collaboration.

Qualifications

• BS/MS in Computer Science or a related field.
• Experience building frontend for web applications.
• Familiarity with AI-assisted development and testing tools.

Responsibilities

• Own and ship the money experiences for fiat deposits/withdrawals, Simple Buy/Sell, and Cards & Pay.
• Build AI-native engineering infrastructure: agent harnesses, reusable skills, automation, evaluation pipelines.
• Make the product data-driven by instrumenting features and building tracking and experimentation foundations.
• Drive frontend quality end-to-end: architecture, performance, testing, and server-driven UI systems.
• Collaborate with product, design, and backend teams across US and APAC to ship features.
• Contribute tooling and patterns to raise the bar for the wider engineering group.

Skills

Web performance

Responsive design

Web security

AI-assisted development

Problem solving

Data-driven decisions

Mandarin Chinese

Education

BS/MS in Computer Science

Tools

Playwright

Job description

Who We Are

At OKX, we believe that the future will be reshaped by crypto, and ultimately contribute to every individual's freedom. OKX is a leading crypto exchange, and the developer of OKX Wallet, giving millions access to crypto trading and decentralized crypto applications (dApps). OKX is also a trusted brand by hundreds of large institutions seeking access to crypto markets. We are safe and reliable, backed by our Proof of Reserves. Across our multiple offices globally, we are united by our core principles: We Before Me, Do the Right Thing, and Get Things Done. These shared values drive our culture, shape our processes, and foster a friendly, rewarding, and diverse environment for every OK-er. OKX is part of OKG, a group that brings the value of Blockchain to users around the world, through our leading products OKX, OKX Wallet, OKLink and more.

About the Opportunity

The Fiat team builds the money experiences of OKX. Beyond the payment rails—fiat deposits, withdrawals, and payment methods across 100+ markets—we own Simple Buy/Sell, the front door to crypto for both onshore and offshore markets, and Cards & Pay, the products taking OKX into the money app category and giving customers a whole new reason to connect with us. We sit inside the Bay Area AI‑Native Product & Engineering Center: we don't just use AI tools, we build agent harnesses, evaluation pipelines, and automation that lets a small team ship like a large one. We're looking for a front‑end engineer who is sharp, curious, data‑driven, and believes most “impossible” things simply haven't been automated yet.

What You’ll Be Doing

Own and ship the money experiences of OKX — fiat deposit/withdraw, Simple Buy/Sell for onshore and offshore markets, and Cards & Pay — the surfaces used by millions of users.

Build AI‑native engineering infrastructure: agent harnesses, reusable skills, E2E automation, and evaluation pipelines that multiply the whole team's output.

Make the product data‑driven: instrument what you ship, build the tracking and experimentation foundations yourself when they don't exist, and let the numbers decide.

Drive frontend quality end-to-end — architecture, performance, testing, and server‑driven UI systems that stay backward‑compatible in production.

Work directly with product, design, and backend teams across the US and APAC to turn ambiguous requirements into shipped features.

Contribute tooling, patterns, and practices beyond your own team — what you build should raise the bar for the wider engineering group.

What We Look For In You

A good sense of web performance, responsive design, and web security — you build experiences that are fast, adaptive across devices, and safe by default.

Hands‑on creativity with AI‑assisted development: you've built things around models — agents, harnesses, MCP tools, eval loops, CI gates — not just used autocomplete.

Sharp problem‑solving: you root‑cause ambiguous problems quickly and make sound calls with incomplete information.

Self‑driven and resilient: you learn faster than expected, push hard deliveries through to completion, and contribute beyond your own scope.

A conviction that decisions should be data‑driven — and the willingness to get your hands dirty building the instrumentation and infrastructure when it doesn't exist yet.

BS/MS in Computer Science or a related field from a strong program, or equivalent evidence of exceptional ability.

Proficiency in Mandarin Chinese is required to communicate effectively with our engineering and product teams across APAC.

Nice to Haves

You've shipped developer tooling, design systems, or open‑source work that other engineers adopted.

Familiarity with server‑driven UI, module federation, or large‑scale frontend library architecture.

E2E automation experience with Playwright — bonus points if you've taught an AI agent to write and maintain the tests for you.

Experience in payments, fintech, or trading products.

L&D programs and Education subsidy for employees' growth and development

Various team building programs and company events

Wellness and meal allowances

Comprehensive healthcare schemes for employees and dependants

More that we love to tell you along the process!

OKX Statement

OKX is committed to equal employment opportunities regardless of race, color, genetic information, creed, religion, sex, sexual orientation, gender identity, lawful alien status, national origin, age, marital status, and non‑job related physical or mental disability, or protected veteran status. Pursuant to the San Francisco Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.

The salary range for this position is $178,888 - $268,333

The salary offered depends on a variety of factors, including job‑related knowledge, skills, experience, and market location. In addition to the salary, a performance bonus and long‑term incentives may be provided as part of the compensation package, as well as a full range of medical, financial, and/or other benefits, dependent on the position offered.