Mobile Developer (Android)

PT. Trimegah Sekuritas Indonesia, Tbk; Jakarta Selatan; On-site; IDR 350,000,000 - 600,000,000; Full time

Job summary

PT Trimegah Sekuritas Indonesia, Tbk is seeking an experienced Android engineer to own the architecture, quality, and performance of the Android app end to end. You will build core flows such as order entry, portfolio, watchlist, and transaction history.

The role requires handling real-time market data via WebSocket, ensuring client order integrity, security, observability, and advancing the CI/CD pipeline with Bitrise or GitHub Actions.

Qualifications

• 5+ years of Android development with senior-level responsibility.
• Deep Kotlin knowledge and Jetpack Compose expertise.
• Strong experience with MVVM/Clean Architecture and DI.
• Proficient in real-time data handling via WebSockets.

Responsibilities

• Own the architecture, quality, and performance of the Android app end to end.
• Build and maintain core flows: order entry, portfolio, watchlist, history, onboarding.
• Mentor engineers and uphold engineering standards across mobile teams.

Skills

Android development

Kotlin

Jetpack Compose

MVVM / Clean Architecture

Dependency injection

WebSockets

Testing

CI/CD

Performance profiling

Tools

Bitrise

GitHub Actions

Instruments

Job description

Own the architecture, quality, and performance of the Android app end to end

Build and maintain core flows: order entry, portfolio, watchlist, transaction history, onboarding

Handle real-time market data on the client — WebSocket lifecycle, reconnect strategy, snapshot + delta, conflation for slow connections, and keeping the UI smooth while thousands of instruments tick

Protect order integrity client-side: client order IDs, deduplication, idempotency, and correct order state machine handling when the network drops mid-submit

Financial-grade app security: certificate pinning, Keychain storage, biometric authentication, jailbreak detection, sensitive-screen protection

Honest mobile observability: crash-free rate, hang rate, cold start, per-endpoint latency — and acting on the numbers

Mature the Android CI/CD pipeline: automated builds, signing, TestFlight, shortening commit-to-release time

Release discipline: feature flags, staged rollout, genuinely tested rollback, and releasing outside exchange hours

Review code, mentor engineers, and set the mobile team's engineering standards

Work with compliance, risk, and security from the design stage rather than as a rubber stamp at the end

Requirements

5+ years of Android development, including at least 2 years carrying senior-level technical responsibility

Deep Kotlin; comfortable in Jetpack Compose

Modern concurrency: Kotlin Coroutines, Combine or equivalent

Architecture at scale: MVVM / Clean Architecture, modularization, dependency injection — and the reasoning behind the choice

Networking: URLSession, WebSockets, caching, graceful behaviour on poor connections

Testing: unit, snapshot, and UI tests, with a clear point of view on what is worth testing

Performance and memory profiling with Instruments

Android CI/CD: Bitrise, or GitHub Actions

Able to explain technical decisions to non-technical stakeholders — in this industry you will do it often

Established in May 1990, now Trimegah Securities is more than just one of the largest and fully integrated securities companies in Indonesia. It is admittedly one of the most trusted securities companies in Indonesia.

Equity Capital Markets Division provides equity brokerage service and margin lending facility for retail and institutional clients. Debt Capital Markets Division facilitates government bond transactions, including Retail Government Bond, Retail Shariah Government Bond, and corporate bonds. Investment Banking Division provides bonds and equity underwriting service, arranger as well as financial advisory. Our subsidiary, PT Trimegah Asset Management, which is established in January 2011, provides clients with various types of mutual funds.

All of these are served through 17 branch offices in 13 major cities throughout Indonesia. The extensive network is expected to further increase clients′ access to Trimegah′s products and services. On top of that Trimegah is always committed to information technology development that will increase the quality of our products and services, and our operations.

Established in May 1990, now Trimegah Securities is more than just one of the largest and fully integrated securities companies in Indonesia. It is admittedly one of the most trusted securities companies in Indonesia.

Equity Capital Markets Division provides equity brokerage service and margin lending facility for retail and institutional clients. Debt Capital Markets Division facilitates government bond transactions, including Retail Government Bond, Retail Shariah Government Bond, and corporate bonds. Investment Banking Division provides bonds and equity underwriting service, arranger as well as financial advisory. Our subsidiary, PT Trimegah Asset Management, which is established in January 2011, provides clients with various types of mutual funds.

All of these are served through 17 branch offices in 13 major cities throughout Indonesia. The extensive network is expected to further increase clients′ access to Trimegah′s products and services, On top of that Trimegah is always committed to information technology development that will increase the quality of our products and services, and our operations.