Senior Frontend Developer

A leading technology division is searching for a Senior Frontend Developer to elevate user experiences for millions across Indonesia’s top classified platform.

Senior Frontend Developer

Salary: Competitive and based on experience

Location: Jakarta

Keywords: collaborative, mentorship, customer experience, performance optimisation, scalability, usability, growth-oriented, diverse teams, agile culture

An exciting opportunity awaits for a Senior Frontend Developer to join a leading technology and engineering division in Jakarta, where your expertise will directly shape the future of e-commerce platforms serving millions of users. This role offers you the chance to work at the forefront of web application development, driving performance, scalability, and reliability across a vast ecosystem of services. You will be empowered to make architectural decisions, collaborate with talented cross-functional teams, and lead initiatives that enhance user experience and optimise web vitals. The organisation is committed to fostering a growth-oriented environment, providing exposure to state-of-the-art technologies and global collaboration opportunities. With a strong emphasis on flexibility, creativity, and professional development, this position is perfect for those who thrive in agile workplaces and are passionate about building customer-centric solutions.

• Work within an agile and adaptable workplace culture that encourages creativity, knowledge sharing, and continuous growth for all team members.
• Engage with cutting-edge technologies while collaborating with diverse teams across multiple countries, ensuring a rich learning environment and broadening your professional network.
• Play a pivotal role in enhancing the user experience for millions by optimising performance and reliability across an extensive suite of digital services.

What you'll do:

As a Senior Frontend Developer based in Jakarta, you will play an instrumental role in shaping the architecture and quality of large-scale web applications within the e-commerce sector. Your day-to-day responsibilities will involve designing robust interfaces that prioritise speed and reliability while working alongside skilled professionals from various disciplines. You will be entrusted with driving optimisation efforts that directly impact user satisfaction metrics, utilising advanced debugging tools to identify areas for improvement. By implementing SSR/SSG frameworks, you will contribute significantly to SEO success while maintaining high standards for code quality through rigorous reviews and automated testing. Your mentorship will help foster growth among junior developers as you guide them through technical challenges. Ultimately, your contributions will ensure that every feature released is not only technically sound but also enhances the overall customer journey.

• Design, build, and maintain high-quality frontend applications with a strong focus on delivering exceptional performance, scalability, and reliability for end users.
• Lead architectural decisions in close collaboration with backend engineers, product managers, and designers to ensure seamless integration and optimal outcomes.
• Drive optimisation initiatives targeting key Web Vitals such as First Paint (FP), Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS), and Interaction to Next Paint (INP) to guarantee best-in-class user experiences.
• Debug, diagnose, and resolve complex technical issues using advanced developer tools including memory profiling, network analysis, and Lighthouse audits.
• Implement and maintain server-side rendering (SSR) and static site generation (SSG) frameworks to support SEO strategies and content performance objectives.
• Oversee continuous integration/continuous deployment (CI/CD) pipelines using GitLab to ensure smooth delivery processes across multiple environments.
• Champion frontend best practices by conducting thorough code reviews, promoting maintainability through testing and documentation standards.
• Provide technical leadership by mentoring junior and mid-level engineers, offering guidance on both technical challenges and career development.
• Collaborate closely with product teams to build features driven by customer experience requirements with a strong emphasis on usability and responsiveness.

What you bring:

To excel as a Senior Frontend Developer in this role you will bring substantial hands-on experience developing sophisticated web applications using modern JavaScript frameworks. Your background should include deep familiarity with React.js interface design principles as well as practical exposure to Node.js service integration. You will have honed your skills in optimising build processes using industry-standard tools like Webpack or Gulp while maintaining high standards for modular CSS implementation. Your proven track record includes successfully managing CI/CD pipelines via GitLab alongside rigorous testing practices employing React Testing Library. A keen eye for performance tuning—especially around Web Vitals—and adeptness at debugging complex issues are essential traits. Additionally, your understanding of SSR/SSG architectures positions you well to address SEO challenges inherent in large-scale e-commerce platforms. Experience translating customer experience requirements into actionable UI enhancements further distinguishes your profile. Finally, your ability to mentor others ensures that knowledge sharing remains central within the team’s culture.

• Bachelor’s degree in Information Technology, Computer Science, Informatics Engineering, Information Systems or related field is required for this position.
• A minimum of six years’ hands-on experience in modern JavaScript development covering both fundamental concepts like Closures and advanced topics such as Currying, Promises, and custom Polyfills.
• Proven expertise in React.js with demonstrated ability to build scalable interfaces focused on customer experience-driven design principles.
• Practical experience working with Node.js for developing performant services as well as integration layers supporting frontend applications.
• Advanced proficiency in bundling and build optimisation using tools such as Webpack and Gulp to streamline development workflows.
• Comprehensive understanding of HTML5 standards along with modern CSS practices including CSS Modules for modular component styling.
• Experience managing CI/CD pipelines via GitLab to automate build processes, testing routines, and deployment cycles efficiently.
• Deep commitment to performance optimisation evidenced by auditing Web Vitals (FP, LCP, CLS, INP) and implementing improvements based on findings.
• Skilled in debugging large-scale applications using browser DevTools—Memory profiling, Network analysis—and leveraging Lighthouse for performance insights.
• Hands-on experience with SSR/SSG architectures enabling effective rendering strategies tailored for SEO enhancement.
• Exposure to customer experience engines coupled with the ability to translate CX requirements into intuitive UI behaviours.
• Solid grasp of SEO fundamentals relevant to single-page applications (SPA), SSR implementations, and content rendering techniques.
• Experience conducting unit tests using React Testing Library (RTL) ensuring robust code coverage across critical components.
• Familiarity with ESLint, SonarQube, Cypress for enforcing code quality standards through automation tools.
• Understanding logging practices along with monitoring/observability strategies essential for maintaining modern front-end systems’ health.
• Experience working within both monolithic architectures as well as micro-frontend structures supporting modular development approaches.
• Basic knowledge of Docker/Kubernetes concepts including pods management plus CPU/memory usage considerations for lightweight deployments.
• Demonstrated capability in providing leadership through mentoring junior developers while fostering collaborative problem-solving environments.

What sets this company apart:

This organisation stands out as Indonesia’s premier classified platform dedicated to used cars—serving over nine million monthly active users through an expansive ecosystem comprising more than 180 distinct services. Employees benefit from engaging projects that leverage state-of-the-art technologies while collaborating across international teams based in India and Indonesia. The company fosters an inclusive environment where creativity flourishes thanks to its agile workplace culture; here you’ll find ample opportunities for professional growth supported by knowledgeable colleagues who value teamwork above all else. Whether you’re seeking exposure to innovative solutions or looking forward to contributing meaningfully within a supportive network—this is the place where your skills can truly make an impact on millions of lives every day.

What's next:

If you are ready to take your frontend expertise to new heights within a thriving e-commerce environment—this is your moment!

Apply today by clicking on the link provided below.

Due to the high volume of applications we are experiencing, our team will only be in touch with you if your application is shortlisted.