Hi, I'm Denis Duran i Báñez, a Barcelona-based Full Stack Developer with a passion for building robust, scalable web applications and SaaS platforms. I specialize in modern front-end and back-end stacks, including Next.js, React, FastAPI, and SQL-based persistence, and I enjoy creating secure, multi-tenant solutions that scale across clients. I value code quality, continuous learning, and delivering real value to teams and products. I have contributed to multi-tenant architectures, authentication integrations with Keycloak, and REST API development, always focusing on a great user experience and robust software design.

Denis Duran i Báñez

Hi, I'm Denis Duran i Báñez, a Barcelona-based Full Stack Developer with a passion for building robust, scalable web applications and SaaS platforms. I specialize in modern front-end and back-end stacks, including Next.js, React, FastAPI, and SQL-based persistence, and I enjoy creating secure, multi-tenant solutions that scale across clients. I value code quality, continuous learning, and delivering real value to teams and products. I have contributed to multi-tenant architectures, authentication integrations with Keycloak, and REST API development, always focusing on a great user experience and robust software design.

Available to hire

Hi, I’m Denis Duran i Báñez, a Barcelona-based Full Stack Developer with a passion for building robust, scalable web applications and SaaS platforms. I specialize in modern front-end and back-end stacks, including Next.js, React, FastAPI, and SQL-based persistence, and I enjoy creating secure, multi-tenant solutions that scale across clients.

I value code quality, continuous learning, and delivering real value to teams and products. I have contributed to multi-tenant architectures, authentication integrations with Keycloak, and REST API development, always focusing on a great user experience and robust software design.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
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Language

Spanish; Castilian
Fluent
English
Intermediate

Work Experience

Full-Stack Developer at Knowmad Mood
June 1, 2025 - September 1, 2025
Development of a multi-tenant web platform using Next.js, React, and FastAPI, enabling secure management of products and users across multiple clients. Integration of Keycloak for authentication and access control, with SQL-based data persistence, ensuring scalability and proper tenant isolation.
Full-Stack Developer at Kriter Software
January 1, 2024 - June 1, 2025
Full-Stack Developer role contributing to the development of client projects in a multi-tenant SaaS context.
Full-Stack Developer
June 1, 2022 - December 1, 2023
Full-Stack Developer with experience in building modern web applications and product-oriented SaaS platforms.

Education

Advanced Vocational Training Diploma in Web Application Development at INS Thosi Codina
January 1, 2020 - January 1, 2022

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Professional Services, Media & Entertainment

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
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