Find a job 
Featured Companies 
Featured Universities 
For Companies At a Glance
- Tasks: Build and optimise user-facing features for our innovative advertising platform.
- Company: Join Topsort, a rapidly growing global tech company on a mission to revolutionise advertising.
- Benefits: Competitive salary, flexible work options, and opportunities for professional growth.
- Why this job: Be part of a team that values creativity and collaboration in a fast-paced startup environment.
- Qualifications: 5+ years in front-end development with strong JavaScript skills; React experience preferred.
- Other info: Diverse and inclusive workplace that celebrates unique perspectives.
The predicted salary is between 36000 - 60000 £ per year.
We are quickly growing and excited for you to join us!
At Topsort, we believe in the mission of democratizing the secret technologies of the walled gardens and creating a privacy-first cookie-free world of clean advertising with modern tech, friendly products, and AI. We aim to make advertising intuitive, intelligent, and genuinely cool, without any of the creepy ads or cookie-obsession.
Topsort has 6 major hubs worldwide, and employees in 13+ countries, including Menlo Park, Boston, Santiago Chile, São Paulo Brazil, Barcelona Spain, and Sydney Australia. We are a global company that has grown rapidly since its founding in 2021, serving customers in retail, marketplaces, and delivery apps in 40+ countries.
At Topsort, we communicate openly and move fast. We say things as they are, challenge each other early, and embrace feedback with curiosity. Every experiment has a purpose, and every outcome helps us make the next decision smarter. There’s no single formula for success here; we find what works, improve it, and scale it. We’re collaborative internally and competitive externally—never the other way around. The pace is quick, and we act with intent, lifting each other up and turning bold ideas into real results. No endless meetings here—if it can be done today, it gets done today.
You’ll be responsible for building and optimizing user-facing features that power our platform, working closely with designers, product managers, and backend engineers to deliver seamless and responsive web experiences. You’ll work primarily with modern JavaScript frameworks like React (and ideally Next.js), focusing on performance, accessibility, and scalability. This role is ideal for someone who thrives in a fast-paced startup environment, enjoys turning complex problems into intuitive interfaces, and takes pride in clean, maintainable code.
What you will do:
- Develop, maintain, and optimize front-end components and user interfaces.
- Work closely with designers, product managers, and backend developers to implement new features.
- Ensure cross-browser compatibility and responsive design for web applications.
Core Requirements & Experience:
- Bachelor's in Computer Science, Design, or related field.
- 5+ years of experience in front-end development.
- Strong knowledge of JavaScript, HTML, CSS, and front-end frameworks such as React.
- Proficiency in modern JavaScript frameworks (React, Vue.js, or similar).
- Experience with front-end build tools and workflows (Webpack, Babel, NPM).
- Strong understanding of responsive design, accessibility, and web performance optimization.
- Preferred experience: Next.js or server-side rendering (SSR).
- Contributions to open-source projects or development of high-traffic web applications.
Bonus Points:
- Demonstrated experience working in a three-tier application architecture.
- Experience working with Python frameworks like FastAPI.
- Experience working with PostgreSQL.
What We Value:
- Deep dive into details: Professionals who are not content with superficial answers and dive deeply into the details to uncover root causes and optimal solutions.
- Team first: A low need for individual recognition, always prioritizing collective results over personal credit.
- You thrive with ambiguity: Exceptional ability to tackle open-ended problems in unstructured environments, turning chaos into structured innovation.
- Adaptability: Willingness to learn, mentor, lead, and follow as the situation demands, fostering growth at all levels.
- Urgency: A disproportionate sense of urgency in execution, while keeping scalability and the creation of replicable processes in mind to ensure long-term success.
- Curiosity: Genuinely curious individuals who can quickly learn difficult concepts and apply them effectively.
We are proud to be an equal opportunity employer and to foster a workplace where diversity is valued and celebrated. We believe that diverse perspectives and experiences strengthen our teams and drive better outcomes.
Senior Frontend Engineer employer: Topsort
Contact Detail:
Topsort Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Senior Frontend Engineer
✨Tip Number 1
Network like a pro! Reach out to folks in your industry on LinkedIn or at meetups. A friendly chat can lead to opportunities that aren’t even advertised yet.
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your best work, especially projects using React or Next.js. This gives potential employers a taste of what you can do.
✨Tip Number 3
Prepare for interviews by practicing common frontend questions and coding challenges. We recommend doing mock interviews with friends or using online platforms to get comfortable.
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets seen. Plus, it shows you’re genuinely interested in joining our team at Topsort.
We think you need these skills to ace Senior Frontend Engineer
Some tips for your application 🫡
Show Your Passion: When writing your application, let your enthusiasm for the role shine through! We want to see how excited you are about building user-facing features and making advertising intuitive. Share why you’re drawn to Topsort's mission and how you can contribute.
Tailor Your Experience: Make sure to highlight your relevant experience in front-end development, especially with JavaScript frameworks like React. We love seeing how your skills align with our needs, so don’t be shy about showcasing your past projects and achievements!
Be Clear and Concise: Keep your application straightforward and to the point. We appreciate clarity, so avoid jargon and focus on what makes you a great fit for the Senior Frontend Engineer role. Remember, we’re looking for clean, maintainable code in your writing too!
Apply Through Our Website: We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you’re considered for the role. Plus, it shows you’re serious about joining our team at Topsort!
How to prepare for a job interview at Topsort
✨Know Your Tech Stack
Make sure you’re well-versed in the technologies mentioned in the job description, especially JavaScript frameworks like React and Next.js. Brush up on your knowledge of HTML, CSS, and front-end build tools like Webpack and Babel, as these will likely come up during technical discussions.
✨Showcase Your Problem-Solving Skills
Prepare to discuss specific examples where you've turned complex problems into intuitive interfaces. Think about challenges you've faced in previous roles and how you approached them, focusing on your thought process and the impact of your solutions.
✨Embrace Collaboration
Topsort values teamwork, so be ready to talk about how you’ve worked with designers, product managers, and backend developers in the past. Highlight your ability to communicate openly and embrace feedback, as this aligns with their fast-paced and collaborative culture.
✨Demonstrate Your Curiosity
Show that you’re genuinely curious about the industry and the role. Ask insightful questions about Topsort’s mission and how they approach clean advertising. This not only demonstrates your interest but also your willingness to learn and adapt in a rapidly changing environment.
