Senior Front-End Developer (Knowledge of carrier value-added services (VAS), telecom billing, or subscription platforms)

AdStart Media (www.adstartmedia.com) is a technology-driven company active in digital advertising and mobile payments, well-established and rapidly expanding globally. As a global organization, we take pride in our partnerships with renowned international brands, esteemed publishing houses, media buyers, and innovative app developers. Our culture is characterized by youthfulness, a spirit of collaboration, and a vibrant social atmosphere.

At our core, we embody a performance-driven ethos, firmly believing that meaningful connections are the catalysts for growth. We highly value diverse perspectives and opinions, as they play a pivotal role in making a substantial impact during our rapid expansion phase.

We are seeking an experienced Senior Front-End Developer to join our Team in Ho Chi Minh City. This role is ideal for a technically strong and creative developer who can design scalable front-end architectures, ensure automation test readiness, and work closely with designers, back-end engineers, and business teams.

YOUR MAIN DUTIES

• Lead the design and implementation of front-end applications using Next.js/ReactJS and modern web technologies.
• Build, optimize, and maintain landing pages, CMS-driven sites, and CRM dashboards.
• Translate design mockups from Figma/Zeplin/Photoshop into responsive and performant code.
• Define and implement front-end architecture that supports automation testing and CI/CD.
• Integrate with RESTful APIs and back-end systems, ensuring performance and reliability.
• Maintain and extend existing WordPress/PHP-based sites as needed.
• Mentor junior developers and ensure code quality, maintainability, and documentation.

Experience: 5+ years in front-end web development.

Core Skills: HTML, CSS, JavaScript, TypeScript, ReactJS, Next.js.

Additional Knowledge:

• Knowledge of carrier value-added services (VAS), telecom billing, or subscription platforms.
• Basic understanding of PHP and WordPress integration.
• Strong skills in API integration, authentication, and data-driven interfaces.
• Experience with unit testing frameworks (Jest, Jasmine, or Testing Library).
• Understanding of Agile/Scrum, Git workflow, and CI/CD pipelines.

Architecture: Able to design scalable, maintainable front-end systems with test automation readiness.

Nice to Have:

• Experience with Java or microservice-based environments.
• Experience with AWS infrastructure.

Soft Skills:

• Strong ownership, attention to detail, and communication.
• Ability to mentor and lead junior developers.
• Proactive and solution-oriented mindset.

• An environment with high energy, flat hierarchy, positive attitude, and growth you would expect from a startup coupled with all of the security and benefits of an established company
• Competitive salary and flexible work life balance
• Paid annual leave and sick leave
• Fun team building activities including annual company trip, parties and other benefits
• An inclusive environment of friends who happen to work together
• And much more