> Markdown version of [/jobs/ext/3635926-full-stack-engineer-senior-lead-id38801](https://www.wearedevelopers.com/jobs/ext/3635926-full-stack-engineer-senior-lead-id38801). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Full Stack Engineer (Senior/Lead) ID38801

- **Company:** AgileEngine
- **Location:** Ribarroja de Turia, Spain (Remote available)
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Mobile Application Development, Information Technology Consulting, Mobile Application Software, Node.Js, Software Engineering, ReactJS, Firebase, Information Technology, Low Latency, React Native
- **Published:** October 8, 2026
- **Apply:** https://www.jobleads.com/es/job/full-stack-engineer-senior-lead-id38801--ribarroja-del-turia--eaadf8909bc5719bde487b5a9fb85a641

## About the Role

* 5+ years of experience building scalable systems
 * Solid experience with ReactJS, NodeJS for web, and React Native for mobile development
 * Proven ability to deliver solutions with high throughput and low latency requirements
 * Demonstrated experience designing and implementing complex business solutions
 * Ability to develop features independently without design guidance, taking ownership from concept to implementation
 * Upper-Intermediate English level

NICE TO HAVES

 * Experience in startups
 * Experience with Firebase Functions

## Description

Overview

Join to apply for the Full Stack Engineer (Senior/Lead) ID38801 role at AgileEngine

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 Engineer to join a fast-growing health and wellness platform with millions of users worldwide. You'll work in a cross-functional, agile team, building and improving features for both web and mobile applications. This role offers the opportunity to enhance performance, deliver seamless user experiences, and make a real impact on a product that helps people reach their wellness goals.

Responsibilities

 * Work independently and provide guidance to other team members
 * Ensure smooth operation and performance of both web and mobile applications
 * Identify, troubleshoot, and resolve bugs efficiently
 * Design, develop, and implement new features across web and mobile platforms

MUST HAVES

 * 5+ years of experience building scalable systems
 * Solid experience with ReactJS, NodeJS for web, and React Native for mobile development
 * Proven ability to deliver solutions with high throughput and low latency requirements
 * Demonstrated experience designing and implementing complex business solutions
 * Ability to develop features independently without design guidance, taking ownership from concept to implementation
 * Upper-Intermediate English level

NICE TO HAVES

 * Experience in startups
 * Experience with Firebase Functions

PERKS AND BENEFITS

 * Professional growth: Accelerate your professional journey with mentorship, TechTalks, and personalized growth roadmaps
 * Competitive compensation: We match your ever-growing skills, talent, and contributions with competitive USD-based compensation and budgets for education, fitness, and team activities
 * A selection of exciting projects: Join projects with modern solutions development and top-tier clients that include Fortune 500 enterprises and leading product brands
 * Flextime: Tailor your schedule for an optimal work-life balance, with options for working from home or going to the office - whichever keeps you happiest and most productive

Seniority level

 * Mid-Senior level

Employment type

 * Full-time

Industries

 * IT Services and IT Consulting

Referrals increase your chances of interviewing at AgileEngine by 2x

Get notified about new Full Stack Engineer jobs in Ribarroja, Valencian Community, Spain.