Frontend Developer / JavaScript (Mid–Senior Level)

Job Description

Company Overview

Sundayy is a modern technology-driven organization focused on building scalable digital products and high-performance web applications. The company works with businesses across different industries, helping them create seamless user experiences through clean, efficient, and maintainable frontend architectures.

The engineering culture at Sundayy emphasizes simplicity, performance, and usability. Teams are encouraged to think beyond just writing code and instead focus on building meaningful user interfaces that solve real-world problems. With a strong commitment to innovation and continuous improvement, the company provides an environment where developers can grow technically while contributing to impactful products.

Job Title

Frontend Developer – JavaScript (Mid-Level / Senior-Level)

This role is designed for experienced frontend engineers who are confident in building modern web applications, working with scalable UI architectures, and collaborating with cross-functional teams including designers, backend developers, and product managers.

The position is suitable for professionals who have strong expertise in JavaScript ecosystems and are looking to work on complex, performance-oriented frontend systems.

Job Overview

We are looking for a skilled Frontend Developer with strong experience in JavaScript and modern frontend frameworks. The ideal candidate should be capable of translating design requirements into responsive, interactive, and high-performance web interfaces.

You will be working closely with product teams to build user-facing features, improve application performance, and ensure a smooth user experience across devices and platforms. This role requires both technical depth and practical problem-solving skills, especially in handling dynamic web applications.

Job Description

As a Frontend Developer at Sundayy, you will be responsible for designing and implementing user interface components for web applications. You will ensure that applications are visually appealing, highly responsive, and optimized for performance.

The role involves working on both new feature development and maintaining existing codebases. You will be expected to write clean, reusable, and scalable code while following best practices in frontend development.

You should be comfortable working in an agile environment, participating in sprint planning, code reviews, and collaborative problem-solving sessions. A strong understanding of browser behavior, rendering performance, and frontend architecture is essential.

Key Responsibilities

• Develop and maintain responsive web applications using JavaScript and modern frontend frameworks
• Translate UI/UX designs into functional and interactive interfaces
• Optimize applications for maximum speed and scalability
• Write reusable, modular, and maintainable code
• Collaborate with backend developers to integrate APIs and services
• Debug and resolve frontend issues across different browsers and devices
• Participate in code reviews and contribute to improving development standards
• Work closely with designers to ensure consistent and user-friendly interfaces
• Continuously improve application performance and user experience
• Stay updated with modern frontend tools, libraries, and best practices

Required Skills and Qualifications

• Strong proficiency in JavaScript (ES6+)
• Hands-on experience with frontend frameworks such as React, Vue, or Angular
• Solid understanding of HTML5, CSS3, and responsive design principles
• Experience with REST APIs and asynchronous request handling
• Familiarity with version control systems such as Git
• Good understanding of browser rendering behavior and performance optimization
• Ability to convert UI/UX designs into functional code
• Experience with state management libraries is an advantage
• Strong problem-solving skills and attention to detail
• Ability to work independently as well as in a team environment
• Minimum experience of mid-level to senior-level frontend development (typically 3–8+ years)

Benefits

Working at Sundayy offers a dynamic and growth-oriented environment where developers can enhance their skills and contribute to meaningful projects.

• Opportunity to work on modern and scalable web applications
• Exposure to advanced frontend architectures and technologies
• Collaborative and product-focused engineering culture
• Learning and development opportunities to grow technical expertise
• Exposure to real-world product challenges and solutions
• Flexible and supportive work environment
• Opportunity to work closely with experienced engineers and product teams
• Career growth into senior technical or leadership roles

How to Apply

Interested candidates are encouraged to apply by submitting their updated resume along with relevant project experience.

Applicants should highlight:

• Frontend projects they have built or contributed to
• Technologies and frameworks they are most comfortable with
• Any performance optimization or UI-focused improvements they have implemented

Once your application is reviewed, shortlisted candidates will be contacted for further technical evaluation, which may include coding assessments, system discussions, and interviews focused on frontend architecture and problem-solving.