Senior / Lead Frontend Developer ()

About The Job
We are looking for a
Senior Front-End Developer / / TypeScript)
to join our growing product team. In this role, you will be responsible for leading front-end architecture decisions, driving best practices, and delivering high-quality, scalable, and high-performance web applications.

You will work closely with designers, backend engineers, and product stakeholders in a fast-paced, fully onsite environment in Bangkok. This is an opportunity to take ownership of key product features and help shape the front-end direction of our platform.

Description
As a Senior Front-End Developer, you will play a critical role in designing and implementing modern, user-focused web interfaces using
, React, and TypeScript
. You will influence technical decisions, review code, improve development processes, and mentor junior developers.

This role is ideal for someone who is passionate about front-end performance, UI/UX quality, system scalability, and clean, maintainable code. You will collaborate in an agile environment where innovation, problem-solving, and continuous improvement are highly valued.

You will have significant autonomy and responsibility—this is a role for someone who wants to build impactful features, propose new ideas, and contribute to shaping the future of our product.

Requirements

• 5–8+ years of professional frontend development experience
• Strong, hands-on expertise in , NextJs, VueJs, JavaScript (ES6+), Type Script, and modern frontend architecture
• Demonstrated ability to lead projects independently and make technical decisions
• Experience in building enterprise-grade, complex, and scalable frontend systems
• Deep understanding of state management (Redux, Flux, Zustand, Recoil, etc.)
• Strong proficiency in RESTful API integration
• Solid understanding of web security, authentication, and authorization (JWT, OAuth)
• Proficient with build tools: Webpack, Babel, NPM/Yarn, CI/CD pipelines
• Experience with performance optimization, profiling, and debugging
• Strong ability to translate product requirements into clean, maintainable, and efficient code
• Excellent problem-solving skills and a self-starter mindset
• Experience with is a strong plus
• Experience in mentoring, reviewing, or leading a small team is a plus

Responsibilities

• Own and lead the entire frontend development of the MessageSpring platform
• Rapidly understand the existing system and start contributing within days
• Design, develop, and maintain high-performance, scalable, and secure frontend architecture
• Build reusable UI components, internal libraries, and shared design systems
• Drive the frontend technical direction, best practices, coding standards, and UI performance strategy
• Work closely with Product, Backend, and Design teams to create fast, intuitive user experiences
• Mentor team members and perform code reviews to ensure quality and consistency
• Proactively identify UI/UX improvements and implement them end-to-end

Nice to have

• Self-driven — does not wait to be told what to do
• Independent — able to work with minimal supervision
• Fast learner — can understand a new system quickly
• Ownership mindset — treats the product as if it's their own
• Fast execution — loves delivering, iterating, improving
• Leadership potential — can guide future frontend hires
• Thrives in a startup environment with speed, clarity, and responsibility

WARNING
Working At MessageSpring May Cause Unexpected Side Effects Like
Becoming the Frontend Owner of the entire platform

Making big decisions on Day 3

Accidentally becoming a Tech Lead because you "just fixed everything"

We move FAST
If Your Style Is
"I need 2 weeks to study the code before touching anything"…

This job is not for you

Here we ship → test → iterate → improve — every week.