Senior Frontend Engineer - Backbone Player (France)

Jobgether; Valbonne; Hybride; EUR 55 000 - 75 000; Plein temps

Résumé du poste

A technology partner company in France is seeking a Senior Frontend Engineer to build and maintain a high-performance HTML video player. The role involves collaborating with cross-functional teams and mentoring junior engineers in an agile environment, either remotely or from a modern office in Sophia‑Antipolis. The ideal candidate will have strong skills in Git, HTML, CSS, and JavaScript, along with experience in modern frameworks like React or Preact. Attractive benefits and career development opportunities are offered.

Prestations

High-end health insurance

Paid time off

Meal vouchers

Fitness subscription

Qualifications

• Experience with HTML5 video API and adaptive streaming formats (HLS, MPEG‑DASH).
• Knowledge of browser‑based testing frameworks (Cypress, Playwright).
• Familiarity with video player libraries such as hls.js.
• Excellent communication skills and comfort speaking English in a professional setting.

Responsabilités

• Develop new features and maintain high-quality user experience.
• Collaborate closely with teams to deliver user-centric features.
• Mentor junior engineers and optimize performance.

Connaissances

Git

HTML

CSS (vanilla)

JavaScript (vanilla)

React/Preact

Performance monitoring

Unit testing frameworks (Jasmine, Jest, Vitest)

Problem-solving

Teamwork

Communication skills

Outils

Webpack

Rollup

Esbuild

Description du poste

This position is posted by Jobgether on behalf of a partner company. We are currently looking for a Senior Frontend Engineer - Backbone Player in France.

As a Senior Frontend Engineer on the Backbone Player team, you will be responsible for building and maintaining a high-performance HTML video player used by hundreds of millions of users worldwide. You will collaborate with cross‑functional teams including engineers, product managers, designers, and data analysts to deliver cutting‑edge features and optimize the video streaming experience. This role combines hands‑on development, performance optimization, and mentoring of junior engineers, allowing you to make a tangible impact on product quality and user satisfaction. You will work in an agile, highly technical environment, either remotely or from a modern office in the heart of Sophia‑Antipolis.

Accountabilities

• Develop new features, fix bugs, and ensure a smooth, high‑quality user experience across multiple browsers and devices.
• Maintain and modernize the HTML video player codebase, following best practices in testing, CI/CD, and coding standards.
• Write and maintain technical specifications and documentation for the codebase.
• Mentor junior engineers and support the growth of the engineering team.
• Collaborate closely with cross‑functional teams to deliver impactful, user‑centric features.
• Optimize performance through observability, runtime and bundle analysis, and code improvements.
• Strong proficiency in Git, HTML, CSS (vanilla), and JavaScript (vanilla).
• Experience with modern JavaScript frameworks and state management (React/Preact preferred).
• Hands‑on experience building advanced reactive web applications using modern tooling.
• Knowledge of performance monitoring, observability, and optimization techniques.
• Familiarity with build tools such as Webpack, Rollup, or esbuild.
• Experience with unit testing frameworks (Jasmine, Jest, Vitest).
• Strong teamwork, problem‑solving, and analytical skills.
• Excellent communication skills and comfort speaking English in a professional setting.

Preferred Qualifications

• Experience with HTML5 video API and adaptive streaming formats (HLS, MPEG‑DASH).
• Experience with browser‑based testing frameworks (Cypress, Playwright).
• Familiarity with video player libraries such as hls.js.
• Flexible remote working options or modern office location in Sophia‑Antipolis.
• Permanent contract with career development support, internal mobility, and 360 feedback reviews.
• High‑end health insurance and personal services vouchers (CESU).
• Paid time off, RTT, and savings time plan (CET).
• Meal vouchers, public transport, and bike reimbursement.
• Fitness subscription and cultural activity vouchers via European Economic and Social Committee.
• Participation in team events, training sessions, and company‑wide initiatives.

Jobgether is a Talent Matching Platform that partners with companies worldwide to efficiently connect top talent with the right opportunities through AI‑driven job matching. When you apply, your profile goes through our AI‑powered screening process designed to identify top talent efficiently and fairly.

🔍 Our AI evaluates your CV and LinkedIn profile thoroughly, analyzing your skills, experience, and achievements.
📊 It compares your profile to the job’s core requirements and past success factors to determine your match score.
🎯 Based on this analysis, we automatically shortlist the three candidates with the highest match to the role.
🧠 When necessary, our human team may perform an additional manual review to ensure no strong profile is missed.

The process is transparent, skills‑based, and free of bias — focusing solely on your fit for the role. Once the shortlist is completed, we share it directly with the company. Final decisions, interviews, and assessments are then handled by their internal hiring team.

Thank you for your interest!

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