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Hi, I'm Sergio Acosta Quintana, a Full-Stack Developer with over three years of experience building scalable web applications, mainly in enterprise settings like IKEA. I have strong skills in Java, Spring Boot, and JavaScript frameworks such as React, and I enjoy creating automation and business-critical tools in cloud-based agile environments. I am passionate about designing robust microservices architectures and improving system reliability through automation. Outside of work, I appreciate collaborating with teams to design solutions that scale effectively and make a real difference to users.…Hi, I'm Sergio Acosta Quintana, a Full-Stack Developer with over three years of experience building scalable web applications, mainly in enterprise settings like IKEA. I have strong skills in Java, Spring Boot, and JavaScript frameworks such as React, and I enjoy creating automation and business-critical tools in cloud-based agile environments. I am passionate about designing robust microservices architectures and improving system reliability through automation. Outside of work, I appreciate collaborating with teams to design solutions that scale effectively and make a real difference to users.

Sergio Acosta Quintana

Full Stack Developer, Developer, Programmer, +2

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Hi, I'm Sergio Acosta Quintana, a Full-Stack Developer with over three years of experience building scalable web applications, mainly in enterprise settings like IKEA. I have strong skills in Java, Spring Boot, and JavaScript frameworks such as React, and I enjoy creating automation and business-critical tools in cloud-based agile environments. I am passionate about designing robust microservices architectures and improving system reliability through automation. Outside of work, I appreciate collaborating with teams to design solutions that scale effectively and make a real difference to users.…Hi, I'm Sergio Acosta Quintana, a Full-Stack Developer with over three years of experience building scalable web applications, mainly in enterprise settings like IKEA. I have strong skills in Java, Spring Boot, and JavaScript frameworks such as React, and I enjoy creating automation and business-critical tools in cloud-based agile environments. I am passionate about designing robust microservices architectures and improving system reliability through automation. Outside of work, I appreciate collaborating with teams to design solutions that scale effectively and make a real difference to users.

Available to hire

Hi, I’m Sergio Acosta Quintana, a Full-Stack Developer with over three years of experience building scalable web applications, mainly in enterprise settings like IKEA. I have strong skills in Java, Spring Boot, and JavaScript frameworks such as React, and I enjoy creating automation and business-critical tools in cloud-based agile environments.

I am passionate about designing robust microservices architectures and improving system reliability through automation. Outside of work, I appreciate collaborating with teams to design solutions that scale effectively and make a real difference to users.

Skills

Experience Level

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

Spanish; Castilian

Fluent

English

Intermediate

Work Experience

Full-Stack Developer at BITBOX S.L (IKEA)

January 1, 2025 - June 13, 2025

Developed and maintained internal tools and systems for IKEA's loyalty card operations used by over 100 employees managing more than 300,000 active credit/debit cards across multiple countries. Migrated critical backend services to Spring Boot, enhancing deployment speed, test coverage, and production system resilience. Replaced legacy PL/SQL jobs with automated Spring Batch workflows, reducing manual intervention by over 30 hours per month. Contributed to the design and implementation of a microservices architecture using Kaa, REST APIs, and internal authentication services to enable scalable, event-driven processes.