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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Full Stack Engineer (Senior/Lead) Id38801 - **Company:** Agileengine - **Location:** Asturias, 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:** September 28, 2026 - **Apply:** https://www.buscojobs.com.es/full-stack-engineer-senior-lead-id-38801-en-bimenes-ID-372530618 ## About the Role 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 ## Description Overview Join to apply for the Full Stack Engineer (Senior/Lead) ID***** role at AgileEngine AgileEngine 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.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.#J-*****-Ljbffr ## Related Videos - [Your next 10x engineer isn't in your city. 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