Senior Frontend Developer

Introduction

We are looking for a Senior Frontend Web Developer who is motivated to combine the art of design with the art of programming. Responsibilities will include translation of the UI/UX design wire-frames to actual code that will produce visual elements of the application. You will work with the UI/UX designer and bridge the gap between graphical design and technical implementation, take an active role on both sides and define how the application looks as well as how it works.

Knowledge and Experience

Excellent experience with the following technologies:

• Web markup, including HTML5, CSS3.
• Server-side CSS pre-processing platforms, such as LESS and SASS.
• Bootstrap.
• Client-side scripting and JavaScript frameworks, including jQuery.
• Advanced JavaScript libraries and frameworks, such as AngularJS, KnockoutJS, BackboneJS, ReactJs, DurandalJS etc.
• Asynchronous request handling, partial page updates, AJAX and JSON.
• Cross-browser compatibility issues and ways to work around them.
• Code versioning tools, such as Git/Mercurial/SVN.
• Good written and verbal English communication skills.
• Excellent problem solving skills.
• Ability to work on multiple projects and in team.
• Service oriented mindset.

Knowing of the following would be great advantages:

• Experience on UX/UI design and Wire-frames.
• SEO principles and ensuring that application will adhere to them.
• Familiar with Optimizely CMS or similar CMS.
• Exposure to an Agile environment.

Job Responsibilities

• Develop new user-facing features.
• Build reusable code and libraries for future use.
• Ensure the technical feasibility of UI/UX designs.
• Optimize application for maximum speed and scalability.
• Assure that all user input is validated before submitting to back-end.
• Collaborate with other team members and stakeholders (back-end developers and web designers to improve usability).

Education

• Bachelor's degree preferred or equivalent work experience.

Competencies

• Driving for Results
• Testing and Troubleshooting
• Delivering High Quality Work
• Displaying Technical Expertise
• Championing Customer Needs

About Optimizely

At Optimizely, we're on a mission to help people unlock their digital potential. We do that by reinventing how marketing and product teams work to create and optimize digital experiences across all channels. With Optimizely One, our industry-first operating system for marketers, we offer teams flexibility and choice to build their stack their way with our fully SaaS, fully decoupled, and highly composable solution.

We are proud to help more than 10,000 businesses, including H&M, PayPal, Zoom, and Toyota, enrich their customer lifetime value, increase revenue and grow their brands. Our innovation and excellence have earned us numerous recognitions as a leader by industry analysts such as Gartner, Forrester, and IDC, reinforcing our role as a trailblazer in MarTech.

At our core, we believe work is about more than just numbers -- it's about the people. Our culture is dynamic and constantly evolving, shaped by every employee, their actions and their stories. With over 1500 Optimizers spread across 12 global locations, our diverse team embodies the "One Optimizely" spirit, emphasizing collaboration and continuous improvement, while fostering a culture where every voice is heard and valued.

Benefits

• We are Vietnam Best IT companies 2026 by ITviec.
• Hackdays for self-studying and researching any IT-related subjects.
• 5 working days/week with flexible working time and no overtime.
• Annual unforgettable company outing.
• International, professional, creative working environment and talented teams.
• Onsite opportunities in Europe and US.
• Common cultural-sportive- art Clubs and activities, sponsored and/or supported by the Company (Ex: Football, GYM, Swimming, Guitar, English…).
• Powerful workstation: Core i7-9700, 16-32 GB RAM, 02 x QHD 2560x1440 monitors (2K resolution).
• 100% official salary during the probation period, 13th month salary, annual salary raise.
• Up to 03 extra paid-leave days per year.
• Social, Health and Unemployed Insurance are based on 100%.
• Gross salary and fully paid by Company.
• Extra bonus at $ 60 per special occasions (Birthday, Labor Day, National Day, Solar New year, Lunar New Year).
• Lunch allowance at $30 per month.
• Baby allowance for a child under 03 years old is $ 12 per month.
• AON Premium Healthcare Insurance package for employees and their children up to 18 years old.
• Daily various foods, drink, and seasonal fresh fruits.