KingMakers

Senior Front-end Software Engineer

  • Madrid
  • 40 hours
  • KingMakers
  • Spain
Apply for this job

The Role:

As a Senior Front-end Software Engineer, you’ll play a key role in ensuring our products are highly resilient, low-latency, and provide an exceptional customer experience. You’ll work closely with Product Managers and a world-class engineering team to develop and optimize our gaming platforms, contributing to our rapid growth.


We’re looking for someone who thrives on solving complex challenges, embraces cutting-edge engineering practices, and has a passion for creating reliable, high-performance systems. In this role, you’ll collaborate closely with cross-functional teams to build, enhance, and support the platforms that power KingMakers’ expanding product portfolio.


This is more than just a technical role: it’s an opportunity to make a lasting impact. At KingMakers, we’re bold in our ideas, fearless in tackling the hardest problems, and relentless in our pursuit of innovation. If you’re ready to bring fresh perspectives, push boundaries, and shape the future of sports and gaming entertainment, we’d love to hear from you.


What you’ll be doing:

  1.  Develop and maintain UI components using React and TypeScript, ensuring high-quality and scalable solutions.
  2.  Integrate seamlessly with backend services through RESTful APIs, delivering a smooth user experience.
  3.  Build high-performance and responsive web applications that work flawlessly across devices.
  4.  Ensure maintainability and performance with best practices in CSS, responsive design, and accessibility.
  5.  Write and maintain unit tests with Jest or similar frameworks, ensuring code reliability.
  6.  Architect scalable frontend solutions, leveraging patterns such as SSG, SSR, Islands, and Streaming SSR.


Requirements

  1. What you need for this role:
  2. Strong expertise in CSS and UI design principles to create intuitive interfaces.
  3. Proven experience building modern web applications with React, TypeScript, and JavaScript.
  4. Experience working with RESTful APIs for seamless backend integration.
  5. Familiarity with unit testing using Jest or similar tools to maintain code quality.
  6. Deep understanding of frontend architectural patterns for scalable applications.
  7. Experience working with CMS platforms like Strapi or Umbraco.
  8. Knowledge of Cloudflare, Vercel, or similar platforms for web hosting.
  9. Familiarity with package managers such as PNPM or Yarn.
  10. Exposure to Application Performance Monitoring (APM) tools like Kibana and Elastic.


Benefits

At KingMakers, we believe great talent deserves great rewards. That’s why we offer competitive compensation packages designed to reflect your expertise and impact.

?? Intensive working day on Fridays, July and August 

? Hybrid Work

? 24 Days Annual Leave

? Birthday Day Off

? Free health insurance with Alan for the employee and a discount for partner and children

? Flexible compensation plan with Alan

? Referral bonus up to $2.500

? Work from our international offices up to 2 weeks per year



JavaScript React TypeScript CSS RESTful unit-testing