Senior Browser Extension Engineer
Senior Browser Extension Engineer

Senior Browser Extension Engineer

Full-Time 48000 - 72000 £ / year (est.) No home office possible
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At a Glance

  • Tasks: Develop high-performance browser extensions using TypeScript and React while solving complex engineering challenges.
  • Company: Join a forward-thinking tech company focused on innovative solutions and user privacy.
  • Benefits: Enjoy flexible work options, competitive salary, and opportunities for professional growth.
  • Why this job: Be part of a dynamic team that values creativity, collaboration, and impactful technology.
  • Qualifications: Strong experience with TypeScript, React, and front-end tooling is essential.
  • Other info: Opportunity to shape the future of browser extensions and enhance user experiences.

The predicted salary is between 48000 - 72000 £ per year.

As a Senior Browser Extension Engineer, you will play a key role in architecting and developing high-performance browser extensions that seamlessly integrate into our ecosystem. Tackling complex engineering challenges, you will influence key technical decisions and contribute to both strategic architecture and hands-on implementation.

Responsibilities:

  • Architect and develop robust, high-performance browser extensions using TypeScript, React, and modern frontend tooling.
  • Clarify and solve ambiguous problems by identifying key requirements, breaking them down into manageable, testable components, and delivering well-engineered solutions.
  • Assess and integrate third-party tools and libraries, making strategic decisions to balance trade-offs effectively.
  • Drive performance optimisations by eliminating bottlenecks, enhancing UI responsiveness, reducing load times, and streamlining event handling.
  • Quickly understand and debug unfamiliar code, using reverse engineering when required to analyse other extensions and diagnose issues effectively.
  • Provide technical representation in cross-functional discussions, advising on feasibility, architectural considerations, and key trade-offs to guide smart product decisions.
  • Build privacy-first features, prioritising secure handling, storage, and transmission of sensitive data.
  • Stay vigilant to security threats, applying fundamental browser security principles to proactively mitigate risks.
  • Advocate for secure coding practices, implementing safeguards to protect user data while balancing privacy, security, and user experience.
  • Improve test coverage for internal npm packages, writing unit and integration tests that validate public interfaces and remain resilient to refactors.
  • Drive modularity and maintainability by contributing well-documented, testable code across our libraries and browser extensions.
  • Shape our automated testing strategy, exploring regression testing for browser extensions to streamline releases and catch issues early.

Experience & Qualifications:

  • Strong commercial experience with TypeScript and React, including advanced TypeScript features and React performance optimisation.
  • In-depth knowledge of front-end tooling (Redux, Webpack, Jest), leveraging these tools to maximise performance and scalability in large-scale, high-performance applications.
  • Deep understanding of browser extension architecture and APIs, with hands-on experience implementing and maintaining complex features.
  • Strong software engineering fundamentals, with proven expertise in event-driven and object-oriented programming and their associated design patterns to build scalable, performant, and maintainable systems.
  • Strong JavaScript expertise, including asynchronous programming, event loop mechanics, closures, and functional patterns.

Senior Browser Extension Engineer employer: Copello Global

As a Senior Browser Extension Engineer at our company, you'll join a dynamic and innovative team dedicated to pushing the boundaries of browser technology. We offer a collaborative work culture that fosters creativity and encourages professional growth through continuous learning opportunities and mentorship. Located in a vibrant tech hub, we provide competitive benefits, including flexible working arrangements and a focus on work-life balance, making us an exceptional employer for those seeking meaningful and rewarding careers.
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Contact Detail:

Copello Global Recruiting Team

StudySmarter Expert Advice 🤫

We think this is how you could land Senior Browser Extension Engineer

✨Tip Number 1

Familiarise yourself with the latest trends and best practices in browser extension development. This includes understanding the nuances of TypeScript and React, as well as keeping up-to-date with performance optimisation techniques that are crucial for high-performance applications.

✨Tip Number 2

Engage with the developer community by participating in forums or contributing to open-source projects related to browser extensions. This not only enhances your skills but also helps you build a network that could be beneficial when applying for roles like the one at StudySmarter.

✨Tip Number 3

Prepare to discuss specific challenges you've faced in previous projects, particularly those involving complex engineering problems or performance bottlenecks. Being able to articulate your problem-solving process will demonstrate your capability to tackle similar issues at StudySmarter.

✨Tip Number 4

Showcase your understanding of security principles in browser extension development. Be ready to discuss how you've implemented secure coding practices in past projects, as this is a key aspect of the role and will highlight your commitment to user data protection.

We think you need these skills to ace Senior Browser Extension Engineer

TypeScript
React
Frontend Tooling (Redux, Webpack, Jest)
Browser Extension Architecture
JavaScript Expertise
Asynchronous Programming
Event-Driven Programming
Object-Oriented Programming
Performance Optimisation
Debugging Skills
Security Principles
Test Coverage Improvement
Modularity and Maintainability
Cross-Functional Collaboration
Technical Documentation

Some tips for your application 🫡

Tailor Your CV: Make sure your CV highlights your experience with TypeScript, React, and browser extension development. Use specific examples of projects where you've tackled complex engineering challenges and made strategic decisions.

Craft a Compelling Cover Letter: In your cover letter, express your passion for developing high-performance browser extensions. Discuss how your skills align with the responsibilities listed in the job description, particularly around performance optimisation and secure coding practices.

Showcase Relevant Projects: Include links to any relevant projects or GitHub repositories that demonstrate your expertise in building browser extensions. Highlight any contributions to open-source projects or personal projects that showcase your skills in TypeScript and React.

Prepare for Technical Questions: Anticipate technical questions related to browser extension architecture, performance optimisation, and security principles. Be ready to discuss your approach to debugging unfamiliar code and your experience with front-end tooling like Redux and Webpack.

How to prepare for a job interview at Copello Global

✨Showcase Your Technical Skills

Be prepared to discuss your experience with TypeScript and React in detail. Highlight specific projects where you've optimised performance or tackled complex engineering challenges, as this will demonstrate your capability to handle the responsibilities of the role.

✨Understand Browser Extension Architecture

Familiarise yourself with browser extension APIs and architecture. Be ready to explain how you've implemented features in past projects and how you approach debugging and reverse engineering unfamiliar code.

✨Discuss Performance Optimisation Strategies

Prepare to talk about your methods for driving performance improvements. Share examples of how you've eliminated bottlenecks, enhanced UI responsiveness, or reduced load times in previous work.

✨Emphasise Security Awareness

Since the role involves building privacy-first features, be ready to discuss your understanding of security threats and secure coding practices. Provide examples of how you've implemented safeguards to protect user data in your past projects.

Senior Browser Extension Engineer
Copello Global
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  • Senior Browser Extension Engineer

    Full-Time
    48000 - 72000 £ / year (est.)

    Application deadline: 2027-03-24

  • C

    Copello Global

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