Senior Full Stack Developer ID80055

Reposted 2 Days Ago
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Madrid, Comunidad de Madrid, ESP
In-Office
Senior level
Software
The Role
Design and implement full-stack features: build user-facing React interfaces, maintain Node.js backends, architect end-to-end solutions, optimize performance, implement automated tests (Jest, RTL, Mocha/Chai), and collaborate with cross-functional international teams to deliver secure, production-ready software.
Summary Generated by Built In
AgileEngine is an Inc. 5000 company that creates award-winning software for Fortune 500 brands and trailblazing startups across 17+ industries. We rank among the leaders in areas like application development and AI/ML, and our people-first culture has earned us multiple Best Place to Work awards.

WHY JOIN US
If you're looking for a place to grow, make an impact, and work with people who care, we'd love to meet you!

ABOUT THE ROLE
We are looking for a Senior Full Stack Developer to build user-facing features in React and maintain robust Node.js backend services for an international product team. You will architect and implement full-stack solutions with expert-level JavaScript and TypeScript, optimize performance across web platforms, implement automated testing with Jest and React Testing Library, and collaborate closely with cross-functional teams to deliver production-ready features. The role requires strong state management experience and a thorough understanding of component-driven design patterns and secure data handling.

WHAT YOU WILL DO
- Develop user-facing features using modern React workflows while building and maintaining robust Node.js backend services;
- Architect and implement full-stack solutions, ensuring seamless integration between the front-end UI and back-end APIs;
- Optimize components for maximum performance across a wide range of web-capable devices and browsers;
- Collaborate with cross-functional teams to define, design, and ship new features.

MUST HAVES
- 4+ years of professional web application development experience;
- Expert-level knowledge of Node.js, React, and modern JavaScript/TypeScript;
- Broad knowledge of web platforms, browser APIs, state management using Redux or Context, and styling strategies;
- Superior analytical and problem-solving ability;
- Experience with automated unit testing and test-driven development using Jest, React Testing Library, and Mocha/Chai;
- Robust understanding of performance issues, computational complexity, and full-stack code optimization;
- Familiarity with industry-standard algorithms, component-driven design patterns, and secure data handling;
- Effective communication skills to work with different teams across an international company;
- Upper-intermediate English level.

PERKS AND BENEFITS
- Professional growth: Mentorship, TechTalks, and personalized growth roadmaps.
- Competitive compensation: USD-based pay with education, fitness, and team activity budgets.
- Exciting projects: Modern solutions with Fortune 500 and top product companies.
- Flextime: Flexible schedule with remote and office options.

Meet Our Recruitment Process
Application → Coding Challenge → Video Interview → Technical Interview or Hiring Manager Interview
Each step helps us understand your skills and overall fit.
If it’s a match, you’ll receive an offer.

Skills Required

  • 4+ years of professional web application development experience
  • Expert-level knowledge of Node.js
  • Expert-level knowledge of React
  • Expert-level knowledge of modern JavaScript and TypeScript
  • Broad knowledge of web platforms, browser APIs, state management (Redux or Context), and styling strategies
  • Experience with automated unit testing and test-driven development using Jest, React Testing Library, and Mocha/Chai
  • Robust understanding of performance issues, computational complexity, and full-stack code optimization
  • Familiarity with industry-standard algorithms, component-driven design patterns, and secure data handling
  • Superior analytical and problem-solving ability
  • Effective communication skills and upper-intermediate English
Am I A Good Fit?
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The Company
HQ: Boca Raton, FL

What We Do

AgileEngine is a privately held company established in 2010 that builds dedicated teams of designers and developers. We turn good ideas into awesome software that people actually want to use. Some of the biggest names and the hottest startups around the world chose us to build their tech.

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