Hire Top Freelance
JavaScript Developers
in Barcelona

Working in the IT sector for more than 10 years. With over 10 -years of freelancing and professional experience taught me all kinds of frameworks and languages, ranging from React, Angular, Vue, Node js, Express js, React Native, Redux, Rx JS, JavaScript, Typescript, WordPress, PHP, MySQL, MongoDB, Firebase, Sqlite, Postgresql, ES5+, Python3, Machine Learning, Deep Learning, RNN, CNN, C/C#/C++, .Net, Assembly, VBA, VB, Excel Macro, Java, Spring Boot Micro-services, R, Shiny, STATA, MATLAB, Google Sheet, App Script, Bubble io, etc. Over my long career, I have come across all kinds of challenges and gained vast experience with different kinds of industries like portals, medical industry, perception exercise, employee management, etc. I have good experience with frontend development using React JS along with Typescript, Firebase, GraphQL, React Native, Native Script, React, Material UI, Ionic, Node.js, Web Sockets, and real-time communication. I have also worked on containerization technologies like Kubernetes, Docker, AWS, GCP, Azure etc. I am very good with backend technologies as well like Java Spring boot, microservices, MySQL, Postgres, Elasticsearch, AWS/Google integration. Please contact me to get the result done in a professional way.

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👋 Hi there, I’m a senior software engineer with over +8 years of experience. I can help you write cleaner code, focus on design patterns, and follow best practices to get quality results fast. I particularly enjoy discussing: * TypeScript * JavaScript * Node * React * GraphQL * NextJS, Astro and Gatsby * Twig * CSS/SCSS * WordPress I’ve been praised for going the extra mile and take pride in delivering neat code that is optimized for maximum readability and scalability. I live for the expression of someone who's been struggling with an issue for hours until the solution finally clicks. I'm a big fan of open source and teamwork. That's why I work on open platforms like [Netlify][1] for my side projects and I offer discounted fees for students who are just starting out. My passions, besides programming, are playing the guitar, playing football and training for my next marathon. 💰 Money-back guaranteed: just let me know if you're not happy with the session and your money stays with you. [1]: https://github.com/netlify/netlify-cms/pull/3412

JavaScriptNext.jsMobile App DevelopmentAstro.jsHTML/CSSTypeScriptGraphQLHTML5CSSFlutterDartWebpackiOSAndroidLeadershipNode.jsjQueryGitWordPressSymfonyWeb DevelopmentPHPReactMentoringInterview PreparationGatsby

I've been coding professionally for 15 years, the last 5 as a cofounder and director of a team of engineers that grew from 2 to 15+ people. I am passionate about programming and enjoy helping other developers, both junior and senior, improve their skills. I have mentored developers that now work at places like Google or Tesla. My experience range is full stack, with a preference for Python, C++ and JavaScript, but I have used many other technologies too. I have a PhD in Bioinformatics, and two degrees in Mathematics and Computer Science. Algorithms, math, competitive programming and biomedicine are other passions of mine, and I'd be glad to help you in those fields too.

JavaScriptBioinformaticsGo (Golang)Interview PreparationSystem DesignProblem solving skillsData ScienceData structureComputer ScienceCompetitive ProgrammingEntrepreneurshipSoftware DesignSoftware ArchitectureVue.jsHaskellAlgorithmLinuxBashKubernetesCDockerRustMachine LearningFull StackC++DjangoPython