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I'm Zakky Rausyan Fikry, a Senior Frontend Engineer who thrives on building high-performance web and mobile apps using TypeScript, React.js, and React Native. I have proven expertise modernizing tech stacks—successfully migrating a backend from Express.js to Next.js and upgrading mobile apps to the latest React Native versions while keeping long-term maintainability and performance in focus. I emphasize code quality, security hardening (SSL pinning, root/jailbreak detection, and anti-snooping measures), robust CI/CD, and close collaboration with product and UX teams to boost user retention. I enjoy ongoing learning and applying new frontend tools to improve product strategy and user experience.…I'm Zakky Rausyan Fikry, a Senior Frontend Engineer who thrives on building high-performance web and mobile apps using TypeScript, React.js, and React Native. I have proven expertise modernizing tech stacks—successfully migrating a backend from Express.js to Next.js and upgrading mobile apps to the latest React Native versions while keeping long-term maintainability and performance in focus. I emphasize code quality, security hardening (SSL pinning, root/jailbreak detection, and anti-snooping measures), robust CI/CD, and close collaboration with product and UX teams to boost user retention. I enjoy ongoing learning and applying new frontend tools to improve product strategy and user experience.

Zakky Rausyanfikry

Front-End Developer, Web Developer, App Developer, +1

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I'm Zakky Rausyan Fikry, a Senior Frontend Engineer who thrives on building high-performance web and mobile apps using TypeScript, React.js, and React Native. I have proven expertise modernizing tech stacks—successfully migrating a backend from Express.js to Next.js and upgrading mobile apps to the latest React Native versions while keeping long-term maintainability and performance in focus. I emphasize code quality, security hardening (SSL pinning, root/jailbreak detection, and anti-snooping measures), robust CI/CD, and close collaboration with product and UX teams to boost user retention. I enjoy ongoing learning and applying new frontend tools to improve product strategy and user experience.…I'm Zakky Rausyan Fikry, a Senior Frontend Engineer who thrives on building high-performance web and mobile apps using TypeScript, React.js, and React Native. I have proven expertise modernizing tech stacks—successfully migrating a backend from Express.js to Next.js and upgrading mobile apps to the latest React Native versions while keeping long-term maintainability and performance in focus. I emphasize code quality, security hardening (SSL pinning, root/jailbreak detection, and anti-snooping measures), robust CI/CD, and close collaboration with product and UX teams to boost user retention. I enjoy ongoing learning and applying new frontend tools to improve product strategy and user experience.

Available to hire

I’m Zakky Rausyan Fikry, a Senior Frontend Engineer who thrives on building high-performance web and mobile apps using TypeScript, React.js, and React Native. I have proven expertise modernizing tech stacks—successfully migrating a backend from Express.js to Next.js and upgrading mobile apps to the latest React Native versions while keeping long-term maintainability and performance in focus.

I emphasize code quality, security hardening (SSL pinning, root/jailbreak detection, and anti-snooping measures), robust CI/CD, and close collaboration with product and UX teams to boost user retention. I enjoy ongoing learning and applying new frontend tools to improve product strategy and user experience.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

Indonesian

Fluent

English

Intermediate

Work Experience

Senior Frontend Engineer at Cermati.com

October 1, 2019 - November 11, 2025

Enhanced stability and developed new product features for Cermati web and app, directly impacting user engagement. Maintained 99% crash-free rate on the Cermati app. Upheld code quality through code reviews per company standards and best practices. Managed CI/CD processes for Cermati app distribution. Achievements include resolving a memory leak on the web server, migrating the web app from Express.js to Next.js, and implementing security patches (SSL pinning, data integrity checks, emulator/root/jailbreak detection, and preventing screen capture of PII data). Upgraded React Native from 0.70.13 to 0.77.3. Contributed to HR assistant Google Chat bot used by all employees. Implemented marketing tools (AppsFlyer, MoEngage, Firebase Analytics) to help marketing gather user journey data. Developed internal QA tools (network logger, remote config fetcher, and app details view) to improve test reporting. Improved app distribution and reduced credit cost by 30% by applying best practices and e

Frontend Engineer at Bukalapak.com

September 1, 2019 - September 1, 2019

Contributed to developing product features on the Mitra Bukalapak app and the admin dashboard. Collaborated closely with backend and UI/UX teams to develop features targeting daily active usage and incremental transactions. Achievements include: Rocket Shake feature enabling users to win a prize after shaking the phone; development of 'Serbu Seru' feature for a product list with time-limited offers in the admin dashboard and Mitra Bukalapak app; development of 'Google My Business' integration to help users add their business to Google Maps directly from the Mitra Bukalapak app.

Frontend Engineer at Skyshi Digital Indonesia

October 1, 2018 - October 1, 2018

First focused on frontend development and initial learning on React.js. Developed features for multiple clients with various products. Maintained code standards in React.js development. Achievements include contributions to the 'Billonaires Store' web revamp (online bookstore) and to 'Passpod.com' web development (online portable WiFi rental for travelers).

Senior Frontend Engineer at Cermati.com

October 1, 2019 - November 26, 2025

Remote – Oct 2019 to Present. Led migration of the web platform from Express.js to Next.js, upgraded the mobile app frontend with React Native from v0.70 to v0.77, and achieved a 99% crash-free rate for the Cermati mobile app through proactive monitoring and robust error handling. Optimized CI/CD pipelines using Bitrise, reducing build credits by 30%. Implemented SSL pinning, root/jailbreak detection, and other security hardening measures. Built internal QA tooling and a company-wide Google Chat bot to streamline collaboration. Collaborated with product and design teams to deliver high-fidelity UI updates and used Firebase and AppsFlyer analytics to inform product strategy and retention.

Senior Frontend Engineer at Cermati.com

October 1, 2019 - November 27, 2025

Led migration from Express.js to Next.js; achieved a 99% crash-free rate for the Cermati mobile app through proactive monitoring and robust error handling. Implemented CI/CD optimizations with Bitrise, security hardening (SSL pinning, root/jailbreak detection, and anti-tamper measures), and built internal QA tooling to streamline the workflow. Drove product strategy through analytics (Firebase, AppsFlyer) and cross-functional collaboration with PMs and design teams.

Front End Engineer at Bukalapak.com

September 30, 2019 - September 30, 2019

Delivered frontend for diverse client projects, including the comprehensive web revamp for the Billionaire Store (online bookstore) and end-to-end development of the Passport.com travel connectivity platform, aligning with rapid business needs and UX improvements.

Front End Engineer at Skyshi Digital Indonesia

October 1, 2018 - October 1, 2018

Delivered frontend solutions for multiple client projects, collaborating closely with Backend and UI/UX teams to engineer high-fidelity UI implementations for critical product updates and client deliverables.

Frontend Engineer at Bukalapak.com

October 1, 2018 - October 1, 2018

Contributed to frontend delivery for diverse client projects, including a comprehensive web revamp of an online bookstore and end-to-end development of a travel connectivity platform.