Kargo creates powerful moments of connection between brands and consumers to build businesses. Every day, our 600+ employees work to radically raise the bar on what agentic AI, CTV, eCommerce, social, and mobile can do to deliver unique ad experiences across the world’s most premium platforms. Taking a creative science approach to all we do, we continuously innovate solutions that outperform industry benchmarks and client expectations. Now 20+ years strong, Kargo has offices in NYC, Chicago, LA, Dallas, Sydney, Auckland, London and Waterford, Ireland.
Techies who want to build the future. Creatives who want to design it better. Communicators to win business. Collaborators to build it. Data pros who turn numbers into insights. Product builders who turn ideas into innovations. Anyone eager to be on a team that doesn’t stop to ask what’s next, because they’re already building it.
- AdAge Best Places to Work
- ThinkLA Partner of the Year
- Built In Best Places to Work
- Cynopsis 2025 Top Women in Media - Jeannine Shao Collins
- Martech Breakthrough Awards - Best Overall Adtech Company
- Digiday Media Awards Best Event
- Cynopsis Media Impact Awards-Best CTV Platform
- Martech Breakthrough Awards-CTV Innovation
- Adweek Media Plan of the Year Awards - Best Use of Insights
Title: Frontend Developer
Job Type: Permanent
Job Location: London
The Opportunity
As a Frontend Developer working at Kargo you will have the opportunity to work on cutting edge technologies, delivering engaging user experiences across the desktop and mobile. As part of this role you’ll be working on the next generation of media planning and buying tools, finding new and innovative ways to simplify complex workflows. You’ll be responsible for helping to guide our overall approach to front-end development and delivering the big little things that really take the user experience to the next level.
The Daily To-Do
In your day-to-day role, you will be responsible for:
- Collaborating with your engineering team to architect front-end and back-end interactions and design reusable APIs.
- Delivering industry-changing features that rethink media planning & buying.
- Implementing and refining components within a reusable design system.
- Ensuring code quality and best practices through implementation of continuous integration and delivery.
Qualifications :
- Expert in React with a strong focus on functional components and modern patterns (hooks, context, etc.).
- Proficient in Javascript, TypeScript and Node.js.
- Hands-on experience with Next.js, Remix or similar frameworks, including SSR, routing, and performance optimization.
- Familiarity with monorepo tools such as Nx or Turborepo for managing scalable codebases.
Nice to have:
- Exposure to backend technologies and systems design.
- Experience with gRPC, Protocol Buffers, or other binary communication protocols.
- CI/CD pipeline familiarity.
- Performance monitoring and front-end observability tools.
- UX/UI sensibility and collaboration with design teams.
Follow Our Lead
- Big Picture: kargo.com
- The Latest: Instagram (@kargomobile) and LinkedIn (Kargo)
Top Skills
What We Do
Kargo creates breakthrough cross-screen ad experiences for the world’s leading brands and publishers. Every day, our 600+ employees bring the power of their creativity and diversity to radically raising the bar on what mobile, CTV, AI, social, and eCommerce can do to wow consumers and build businesses. Now 20 years strong, Kargo has offices in NYC, Chicago, LA, Dallas, Sydney, Auckland, London and Waterford, Ireland.
Why Work With Us
The key to our success is our people. We’ve built a community that values teamwork, is not afraid to take chances and relentlessly strives to disrupt the industry and stand out from the crowd. Diversity is fundamental to the Kargo culture as we celebrate and embrace our differences in our inclusive workplace.
Gallery
Kargo Offices
Hybrid Workspace
Employees engage in a combination of remote and on-site work.
