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# Full Stack Engineer (Senior/Lead) Id38801

- **Company:** Agileengine
- **Location:** Valencia, Spain (Remote available)
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Mobile Application Development, Mobile Application Software, Node.Js, Software Engineering, ReactJS, Firebase, Low Latency, React Native
- **Published:** August 6, 2026
- **Apply:** https://www.buscojobs.com.es/full-stack-engineer-senior-lead-id-38801-en-valencia-ID-365633673

## 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

OverviewJoin to apply for the Full Stack Engineer (Senior/Lead) ID***** role at AgileEngineAgileEngine is an Inc. **** 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.ResponsibilitiesWork independently and provide guidance to other team membersEnsure smooth operation and performance of both web and mobile applicationsIdentify, troubleshoot, and resolve bugs efficientlyDesign, develop, and implement new features across web and mobile platformsMUST HAVES5+ years of experience building scalable systemsSolid experience with ReactJS, NodeJS for web, and React Native for mobile developmentProven ability to deliver solutions with high throughput and low latency requirementsDemonstrated experience designing and implementing complex business solutionsAbility to develop features independently without design guidance, taking ownership from concept to implementationUpper-Intermediate English levelNICE TO HAVESExperience in startupsExperience with Firebase FunctionsPERKS AND BENEFITSProfessional growth: Accelerate your professional journey with mentorship, TechTalks, and personalized growth roadmapsCompetitive compensation: We match your ever-growing skills, talent, and contributions with competitive USD-based compensation and budgets for education, fitness, and team activitiesA selection of exciting projects: Join projects with modern solutions development and top-tier clients that include Fortune 500 enterprises and leading product brandsFlextime: 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 productiveSeniority levelMid-Senior levelEmployment typeFull-timeIndustriesIT Services and IT ConsultingReferrals increase your chances of interviewing at AgileEngine by 2xGet notified about new Full Stack Engineer jobs in Ribarroja, Valencian Community, Spain.#J-*****-Ljbffr


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