Frontend Engineer (Web & Native Mobile)

Bitara Capital Sdn. Bhd.; Kuala Lumpur; On-site; MYR 90,000 - 150,000; Full time

Benefits offered by this job

Competitive compensation

Hybrid/ Flexible work

Annual Leave

Medical & Insurance

Learning budget

Job summary

Jora Malaysia is seeking an experienced frontend engineer to own the trading interfaces and real-time data streams. You will build features for the trading terminal, onboarding, deposits, and account security while ensuring precise money formatting and robust internationalisation including Mandarin.

You will collaborate across teams across the region to deliver high-performance web and mobile experiences. The role requires strong React/TypeScript skills, a track record with real-time data, and

Qualifications

• 5–8 years of professional frontend engineering experience.
• Strong React and TypeScript with modern hooks and state management.
• At least one native mobile app shipped to a public store that you personally built a significant part of.
• Real-time interface experience— WebSocket or equivalent streaming, with a working understanding of reconnection, ordering, and stale-state handling.
• Demonstrable performance engineering— you have profiled a slow interface, found the cause, and fixed it, and can describe how.
• Correctness instincts around money— decimal precision, rounding rules, and idempotent user actions.
• Internationalisation experience shipping a product in more than one language, ideally including Mandarin.
• Professional working proficiency in both English and Mandarin— reading and speaking.

Responsibilities

• Build and own the trading terminal— order book, depth chart, order entry, open orders and positions, trade history, and the portfolio and account views around them.
• Ship the surrounding product surfaces— registration and KYC onboarding, deposit and withdrawal flows, security settings, fee and market information pages.
• Get money display exactly right— never floating point for balances, per-market tick and lot size rounding, correct display precision, and unambiguous formatting of very large and very small numbers.
• Design order entry so a mistake is hard to make— clear confirmation for market orders, sane defaults, disabled states while a request is in flight, and no path where a double click sends two orders.
• Consume high-frequency WebSocket streams correctly— snapshot-plus-diff order book reconstruction, sequence gap detection, resubscription and resynchronisation after a reconnect, and clearing stale state rather than showing it.
• Keep the interface at 60fps under load— virtualised lists, canvas or WebGL rendering where the DOM cannot keep up, batched updates, memoisation, and elimination of layout thrash.
• Profile rather than guess— flame charts, React profiler, long-task tracing, and bundle analysis, with the measurement attached to the pull request.
• Handle degraded networks deliberately— reconnect with backoff, offline and reconnecting states the user can see, and an explicit rule for what the screen shows when data is no longer trustworthy.
• Partner across time zones with backend, design, product, and compliance colleagues.
• Write tests where they earn their place— unit tests on money and formatting logic, component tests on order entry, and end-to-end coverage of the flows that move funds.

Skills

React

TypeScript

WebSocket

Performance tuning

Money formatting

i18n

English Mandarin

Tools

Kotlin

Swift

Job description

Jora Malaysia will close on 9th September 2026. Thank you for being with us, we are cheering you on as you continue your career journey.

Requirement

• 5–8 years of professional frontend engineering experience building and maintaining production web applications.
• Strong React and TypeScript— modern hooks, state management, rendering behaviour, and the discipline to keep a large codebase navigable.
• At least one native mobile app shipped to a public store that you personally built a significant part of, in Kotlin (Jetpack Compose or Android Views) or in Swift (SwiftUI or UIKit).
• Real-time interface experience— WebSocket or equivalent streaming, with a working understanding of reconnection, ordering, and stale-state handling.
• Demonstrable performance engineering— you have profiled a slow interface, found the cause, and fixed it, and can describe how.
• Correctness instincts around money— decimal precision, rounding rules, and idempotent user actions.
• Internationalisation experience shipping a product in more than one language, ideally including Mandarin.
• Professional working proficiency in both English and Mandarin— reading and speaking. See Language Requirements below.

Responsibility

Web Trading Interfaces

• Build and own the trading terminal— order book, depth chart, order entry, open orders and positions, trade history, and the portfolio and account views around them.
• Ship the surrounding product surfaces— registration and KYC onboarding, deposit and withdrawal flows, security settings, fee and market information pages.
• Get money display exactly right— never floating point for balances, per-market tick and lot size rounding, correct display precision, and unambiguous formatting of very large and very small numbers.
• Design order entry so a mistake is hard to make— clear confirmation for market orders, sane defaults, disabled states while a request is in flight, and no path where a double click sends two orders.

Real-Time Data & Performance

• Consume high-frequency WebSocket streams correctly— snapshot-plus-diff order book reconstruction, sequence gap detection, resubscription and resynchronisation after a reconnect, and clearing stale state rather than showing it.
• Keep the interface at 60fps under load— virtualised lists, canvas or WebGL rendering where the DOM cannot keep up, batched updates, memoisation, and elimination of layout thrash.
• Profile rather than guess— flame charts, React profiler, long-task tracing, and bundle analysis, with the measurement attached to the pull request.
• Handle degraded networks deliberately— reconnect with backoff, offline and reconnecting states the user can see, and an explicit rule for what the screen shows when data is no longer trustworthy.

Native Mobile — Android or iOS

• Build and ship native app features in Kotlin with Jetpack Compose, or in Swift with SwiftUI and UIKit — trading, funding, account management, and notifications.
• Implement platform security properly— biometric authentication via BiometricPrompt or Face ID, key material in Keystore or Keychain, certificate pinning, screenshot suppression on sensitive screens, and root or jailbreak detection.
• Manage real-time connections under mobile constraints— socket lifecycle across backgrounding and process death, battery and data cost, and push notification delivery through FCM or APNs.
• Own the release pipeline— signing, staged rollout, App Store and Play Console submissions, review responses, crash triage, and adoption monitoring of each version.
• Keep platforms consistent without flattening them— the same feature and the same guarantees on every client, expressed through each platform's own conventions rather than a shared lowest common denominator.

Design System, Localisation & Accessibility

• Build and maintain a shared component library with design tokens that hold up across web and native, including a dark theme that is designed rather than inverted.
• Deliver a genuinely bilingual product— English and Mandarin in both Simplified and Traditional, with correct CJK typography and line breaking, locale-aware number, date and currency formatting, and layouts that survive a 40% string length change.
• Make the product usable for everyone— keyboard navigation and focus management on web, screen reader labelling on order entry, dynamic type support on mobile, and contrast that holds in both themes.
• Work closely with design— challenge a mock that will not survive live data, and push back on any pattern that makes an irreversible action easy.

Client Security

• Handle credentials and sessions safely— token storage and refresh rotation, session timeout, device binding, and no secret material that a client should never hold.
• Defend the web surface— Content Security Policy, XSS and clickjacking prevention, dependency review, and caution with anything that injects third-party script into a page where people move money.
• Build anti-phishing patterns into the product— withdrawal address whitelisting, confirmation flows that show what is actually being signed, and anti-phishing codes in notifications.

Collaboration & Craft

• Partner across time zones with backend, design, product, and compliance colleagues.
• Write tests where they earn their place— unit tests on money and formatting logic, component tests on order entry, and end-to-end coverage of the flows that move funds.
• Raise the engineering bar through code review, technical documentation, and mentoring of junior engineers.
• Translate between contexts— clarifying Mandarin-language specifications and user feedback for English-speaking teammates and vice versa.

Benefits

• Competitive compensation
• Ownership of the surface customers actually judge us on
• A regional platform
• Annual Leave
• Medical and insurance coverage
• flexible or hybrid working arrangements
• A learning budget