Senior Web Engineer – Platform

Ajaib

. Design, build and maintain shared web foundations, including a component library, design system, shared packages and the application shell .

Posted 11/8/2026full-timeJakarta • IndonesiaSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in building and maintaining shared web foundations, including component libraries and design systems, while ensuring performance, accessibility, and security. Proficient in mentoring engineers and enhancing CI/CD processes for improved build performance and stability.

Highest-signal resume keywords

TypeScriptJavaScriptReactNext.jsCI/CD

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Web EngineeringComponent DesignUnit TestingIntegration TestingVisual TestingEnd-to-End TestingPerformance ProfilingWeb SecuritySemantic VersioningError Monitoring

Soft Skills

Ownership MindsetClear CommunicationService Attitude

Tools & Technologies

MonoreposBundlersBuild Performance ToolsChangelogsMigration Guides

Certifications & Qualifications

Bachelor's Degree in Computer Science

Industry Keywords

FintechRegulated ProductsHigh-Traffic Consumer Products

Tech Stack

Tools & technologies

JavaScriptNext.jsReactTypeScript

About the role

Key responsibilities & impact

Design, build and maintain shared web foundations, including a component library, design system, shared packages and the application shell
Own features end to end, including technical design, implementation, testing, release and support for teams that use them
Keep shared packages stable through clear APIs, semantic versioning, changelogs, migration guides and safe deprecation
Build accessible, themeable and well-documented components
Build and improve secure sign-in, session and token handling on the web with backend and Security teams
Improve build speed, CI/CD pipelines, monorepo tooling and release automation for all web teams
Set and measure performance budgets and quality standards, including Core Web Vitals, bundle size and accessibility checks
Write maintainable, well-tested code and provide thoughtful code reviews
Investigate production issues from error monitoring and product-team feedback, and ship lasting fixes
Mentor mid-level engineers and share web practices across teams

Requirements

What you’ll need

Bachelor's degree in Computer Science or equivalent practical experience
5+ years of professional web engineering, including building shared libraries, design systems or tooling used by several teams
Strong in TypeScript and JavaScript
Deep experience with React and a modern framework such as Next.js
Strong component design
Experience with monorepos, bundlers, package publishing and build performance
Solid experience with unit, integration, visual and end-to-end testing, CI/CD and error monitoring
Strong in browser performance profiling, accessibility and web security, including authentication on the web
Ownership mindset, clear communication and a service attitude toward internal users
Experience in fintech or another regulated, high-traffic consumer product is a plus

Benefits

Comp & perks

Performance Bonus - Get rewarded for the impact you make
Private Insurance - Comprehensive health coverage for you
Paid Time Off - Take the time you need to recharge and come back stronger
Learning & Development - Company-sponsored training, courses, and professional certifications
Hybrid Work Arrangement - Enjoy the flexibility of working both remotely and from the office
Career Growth - Work closely with experienced leaders and take on meaningful ownership as we scale
Employee Perks - Enjoy exclusive discounts, partnerships, and lifestyle perks
Collaborative & High-Ownership Culture - Work with smart, driven people in cross-functional teams, take ownership, and make a meaningful impact for our users.