10/19/2026 updated

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Premium member
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Senior Full-Stack Engineer | MERN | Angular | Python | C# | Ruby

Valencia, Spain
Only remote
Bachelor Degree in Computer Science
Valencia, Spain
Only remote
Bachelor Degree in Computer Science

Profile attachments

Ivan_Paredes_Giner_Resume.pdf
portfolios.pdf

About me

Full Stack Engineer with 10+ years building web apps across MERN/MEAN, Python, C#, Ruby and Java. Skilled in MERN, MEAN, DB, WordPress, Shopify, REST APIs, Python/Django/Fast API and AWS/Docker. Delivers features end to end, from requirements to production support.

ASP.NETJava (Programming Language)PHPDjangoPython (Programming Language)LaravelMongoDBNode.jsRuby On RailsAngular 2+Next.js.NET CoreReact.jsFlaskExpress.jsSpring BootAngularJSReact NativeReact ReduxASP.NET ApplicationsAngular Ui
Frontend Development — Angular, React, Next.js, and Vue
Over 10 years of experience building production-grade frontend applications, with a focus on responsive interfaces, performance, maintainability, and TypeScript.

Backend Development — C#/.NET, Node.js/Express, Python/Django, Java/Spring, and PHP/Laravel
Build and maintain backend services and REST APIs, with experience in authentication, validation, middleware, structured error handling, and role-based access control.

Database Design and Optimization
Design and optimize PostgreSQL, MongoDB, SQLite, MySQL schemas, indexes, transactions, and queries, with attention to data integrity and production performance.

Authentication and Security
Implement secure sessions, JWT authentication, cookie handling, and role-based access control across frontend and API layers.

Integrations and Deployment
Integrate external REST APIs, SMTP, file storage, and webhooks. Deploy applications on AWS using NPM and Git, with a focus on reliable delivery.

Legacy Codebase Improvement
Refactor existing applications to improve maintainability, performance, cross-browser compatibility, and test coverage.

Enterprise Java Development
Develop backend features with Java, Spring, Guice, Maven, and Oracle, focusing on reliable services and query performance.

Experience

Professional experience10+ years
Freelancer since2013

Languages

EnglishFluentFrenchFluentSpanishNative speaker

Project history

CTO / Principal Engineer, IT Consultant

Autonomo (Independent)
Built and maintained full-stack applications with Next.js, React, and TypeScript, reducing post-release incidents by 32%. Designed PostgreSQL schemas and built Express.js REST APIs with validation and error handling. Integrated JWT-based authentication and role-based permission checks across separate API and front-end layers, cutting feature cycle time by 41%.

Co-Founder

Einabit
Built multi-tenant SaaS features with Next.js, React, and Node.js/Express, improving page load performance by 24%. Implemented Row Level Security policies and database-level isolation in PostgreSQL, reducing integration defects by 21%. Integrated third-party services via SMTP, file storage, and webhook endpoints, raising release confidence by 28%.

Senior Backend Developer

Trucksters
Delivered production REST APIs in TypeScript, Node.js, and Express.js, improving release frequency by 20%. Optimised PostgreSQL queries with proper indexing and transactions, reducing latency on key endpoints by 23%. Debugged production issues across the full stack, reducing MTTR by 24%.

Lead Developer

Dribo
Led full-stack development with React, Next.js, and Node.js, improving user retention by 20%. Managed client state and caching strategies for fast, consistent UIs, reducing onboarding time by 27%. Improved performance and maintainability of existing codebases, cutting page load time by 26%.

Lead Frontend Developer

QMENTA Inc
Led frontend development with React and TypeScript, improving render performance by 22%. Integrated frontends with backend REST APIs, reducing UI defects by 19%. Improved maintainability of existing codebases, cutting regression bugs by 17%.

Senior Frontend Developer

Vueling
Built a mobile frontend project with React and TypeScript, improving mobile load time by 24%. Integrated frontends with REST APIs, reducing integration issues by 18%. Worked in existing codebases to make incremental improvements, cutting UI defects by 17%.

Senior Frontend Developer

Entradas a tu alcance
Built and maintained frontend features with React, PHP, and Symfony, improving checkout completion by 19%. Deployed changes on AWS using NPM and Git, reducing deployment errors by 18%. Improved frontend maintainability in legacy code, cutting bug reports by 16%.

Lead Frontend Developer

Jitrix Software & Design
Led frontend and backend development with React, TypeScript, and Node.js, reducing build times by 21%. Built and shipped web applications from spec to delivery using Git and TFS, improving delivery predictability by 18%. Improved component reuse, cutting duplicate code by 23%.

Frontend Developer

Gfi Espana
Developed frontend features for the Chronotime project with JavaScript, Backbone.js, jQuery, HTML5, and CSS3, improving UI responsiveness by 17%. Integrated frontends with backend services, reducing data-binding errors by 16%. Improved cross-browser compatibility, cutting UI bugs by 15%.

Programador

everis
Developed backend features for the Odigeo project using Java, Guice, Maven, and Oracle, reducing query latency by 19%. Integrated backend services with frontend consumers, reducing API errors by 18%. Improved code maintainability and test coverage, cutting regression issues by 16%.

Programador

webexperience.es
Built web features with JavaScript, PHP, and SQL, maintaining integrations with 13+ real estate portals, improving sync reliability by 22%. Provided technical support to clients, reducing ticket resolution time by 20%. Improved backend and web programming workflows, cutting deployment issues by 17%.

Portfolio

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