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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Full Stack Engineer (Senior/Lead) Id41561 - **Company:** Agileengine - **Location:** Madrid, 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 5, 2026 - **Apply:** https://www.buscojobs.com.es/full-stack-engineer-senior-lead-id-41561-en-madrid-ID-365605853 ## About the Role 5+ years of experience building scalable systems Solid experience with ReactJS and 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 Full Stack Engineer (Senior/Lead) 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 application development and AI/ML, and our people?first culture has earned us multiple Best Place to Work awards.WHY JOIN USIf 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 ROLEAs a Full Stack Senior/Lead Engineer at AgileEngine, you'll join a cross?functional, agile team to build new features and enhance product experiences for millions of users.You'll contribute across web and mobile platforms, improve performance, and ensure seamless user interactions.WHAT YOU WILL DOWork 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 and 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 to work from home or in the office#J-*****-Ljbffr ## Related Videos - [Stop using Node.js like in 2020! What changed and what you can do today with Node.js](https://www.wearedevelopers.com/videos/100011-stop-using-node-js-like-in-2020-what-changed-and-what-you-can-do-today-with-node-js) - [Watch Tests Go Brrrr! : Getting Started with Cypress in ReactJS](https://www.wearedevelopers.com/videos/282-watch-tests-go-brrrr-getting-started-with-cypress-in-reactjs) - [Intro to Flutter Development](https://www.wearedevelopers.com/videos/170-intro-to-flutter-development) - [Build and Deploy a Fullstack App with Open Source Tooling](https://www.wearedevelopers.com/videos/775-build-and-deploy-a-fullstack-app-with-open-source-tooling) - [Stop Using Node.js Like It’s 2020! - Alfonso Graziano](https://www.wearedevelopers.com/videos/1863-stop-using-node-js-like-it-s-2020-alfonso-graziano) - [Your next 10x engineer isn't in your city. Refactor accordingly.](https://www.wearedevelopers.com/videos/100103-your-next-10x-engineer-isn-t-in-your-city-refactor-accordingly) ## Related Articles - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [7 Most Popular Web Developer Jobs in Europe](https://www.wearedevelopers.com/magazine/163-7-most-popular-web-developer-jobs-in-europe) - [Where To Find Software Engineering Jobs](https://www.wearedevelopers.com/magazine/396-where-to-find-software-engineering-jobs)