Senior Frontend Engineer - Backbone Player (All Genders)

Company Description

Dailymotion is more than a video app it's a visual conversation in motion based on a unique algorithm designed to broaden users' horizons. Dailymotion brings nuance to the debates that animate young people and puts listening discovery and kindness back at the heart of interactions to help build a better and safer Internet.

Dailymotion is also ' Dailymotion Pro ' a video hosting and broadcasting solution for professionals in all sectors; and 'Dailymotion Advertising' a powerful proprietary video advertising platform offering a high-quality secure environment for brands.

Our team is made up of 400 people in France New York and Singapore all united by the same ambition: to visibly shake up the global video platform ecosystem.

At Dailymotion our team of talented individuals from over 40 nationalities embraces four core values every day:

• Opening Perspectives: We love connecting different ideas and people supporting freedom of speech and inclusivity and celebrating diverse cultures.

• Making Bold Moves: We’re daring and ambitious ready to take unique steps that bring noticeable improvements to our platform.

• Building a Safer World: Empathy guides us. We care deeply about each other and are dedicated to creating a safe and supportive community.

• Creating Meaning: We spark curiosity and joy in everything we do feeling proud of our work and eager to share that fulfillment with everyone.

Our team comprises 400 people in France New York and Singapore all united by the same ambition: to shake up the global video platform ecosystem visibly.

Job Description

As a Senior Frontend Engineer in the Backbone Player team you'll work on the company's flagship product the HTML video player. Our video player is used by more than 300 million users every month directly on our platform and on high-traffic websites using our technology.

Reporting to the VP Engineering you will join the Player Perf team and work with a diverse group of people from around the world all of them committed in improving our video player – in a caring agile and highly-technical environment.

You will collaborate with experienced engineers infrastructure devops product managers designers and data analysts across the company to deliver features to our users and publishers with a focus on video streaming experience.

Our remote policy is quite flexible and it's fine if you choose to work from home. Or you can also enjoy our very nice office located in the heart of Sophia-Antipolis.

The ideal candidate has a collaborative mindset a demonstrated experience building and delivering high-performance web applications and a strong taste for finely crafted products.

Responsibilities

- Contribute to the team effort to develop new features fix bugs and deliver a state of the art user experience to a variety of browsers and devices (mobiles tablets desktops)- Maintain existing codebase with a focus on the HTML video player and contribute to keep it up to date with current technology and best practices (tests coding guidelines continuous deployment)

- Write and maintain technical specifications and technical documentation about the codebase

- Take part in a collaborative culture that encourages every member of our team to bring their added value

- Mentor junior engineers and contribute to growth of the team

Qualifications

- Strong proficiency with Git

- Strong proficiency in HTML CSS (vanilla) and JavaScript (vanilla)

- Strong proficiency in standard web development (how the web platform works outside of any framework or library)

- Experience with modern JavaScript frameworks & state management (ideally React/Preact)

- Experience in performance initiatives like observability monitoring code optimization runtime and bundle analysis

- Experience with build tools (Webpack Rollup esbuild...)

- Experience with unit tests tools (Jasmine Jest Vitest...)

- Professional experience building advanced reactive web applications using modern tooling

- Professional experience with development best practices (unit tests functional tests CI code reviews documentation agile processes)

- Strong teamwork mindset (work with the team and for the team)

- Excellent problem-solving analytical skills

- Excellent communication and collaboration skills

- Comfortable speaking in English

Bonus points

- Experience with standard HTML5 video API

- Experience with browser-based testing frameworks (Cypress Playwright)

- Experience with adaptive streaming format such as HLS or MPEG-DASH (ideally https://github.com/video-dev/hls.js as Dailymotion Player relies on it)

Additional Information

Location: Flex Office in Valbonne / Sophia-Antipolis

Start Date: Jan 2026

Contract Type: Permanent

🔍Want to learn more about us:

• Dailymotion.com

• New-York office - BuiltIn

• Offices in France - Welcome to the Jungle

• Our articles

For the France offices :

💰 Saving Plan Canal +

🍼  Paternity leave or Coparental leave extended

🕶️  Living Employee Culture (Events/Trainings/Parties/All hands…)

🚀  Career development support (training/internal mobility/compensation cycle/360 feedback review …)

🏥  High-end Health Insurance and Personal Services Vouchers (CESU)

⛱️  Paid Time off – RTT and Saving time plan (CET)

✅  Meal Vouchers – Public Transport and Bike refund

🎡 European Economic and Social Committee (sport membership/cinemas vouchers/gift vouchers/discount)

⚽Fitness Subscription thanks to our partnership with Gymlib