Guillermo Sierra
@guillermosierra
Senior Frontend & Mobile Developer with a focus on UX.
What I'm looking for
I'm Guillermo Sierra, a Senior Frontend and Mobile Developer based in Barcelona, Spain. With extensive experience in leading frontend development for various platforms, I specialize in creating immersive user experiences through optimized UI/UX design. My current role at Laurel Gaming involves spearheading the frontend development of a gaming platform, where I utilize React Native and TypeScript to enhance user engagement.
As the founder of Divenamic, I have successfully built a diving marketplace that emphasizes user experience, leveraging hybrid web and mobile solutions. My previous roles at Holded and BodBoca allowed me to develop scalable UI components and mobile-first e-commerce platforms, respectively, using technologies like React, Next.js, and GraphQL. My journey in software engineering began with a solid educational foundation from EPFL and UPC, where I honed my skills in telecommunications and software engineering.
Experience
Work history, roles, and key accomplishments
Founder
Divenamic
Jul 2023 - Present (1 year 10 months)
Created a diving marketplace focusing on UX, building hybrid web and mobile solutions with React Native and Firebase.
Senior Frontend Developer
Laurel Gaming
Nov 2023 - Present (1 year 6 months)
Led frontend development for a gaming platform, optimizing UI/UX for immersive user experience using React Native and TypeScript.
Senior Frontend Developer
Holded
Feb 2023 - Jun 2024 (1 year 4 months)
Developed scalable UI components and improved application performance for Holded's accounting software using React, Next.js, and GraphQL.
Android Developer
Amadeus
Mar 2017 - Sep 2017 (6 months)
Worked on core mobile booking system, implementing performance improvements using Kotlin and Java.
Senior Mobile Developer
BodBoca
Jan 2023 - Jan 2024 (1 year)
Developed a mobile-first e-commerce platform with React Native, Firebase, and GraphQL, focusing on seamless UX and scalable architecture.
Android Developer
SEAT
Sep 2016 - Mar 2017 (6 months)
Developed the proof-of-concept Android app for connected vehicles using NFC technology and Java.
Education
Degrees, certifications, and relevant coursework
École Polytechnique Fédérale de Lausanne
Master of Science, Software Engineering
2016 - 2018
Final Degree Project in Software Engineering.
Universitat Politècnica de Catalunya
Bachelor of Science, Telecommunications Engineering
2010 - 2016
Telecommunications Engineering.
Tech stack
Software and tools used professionally
Interested in hiring Guillermo?
You can contact Guillermo and 90k+ other talented remote workers on Himalayas.
Message GuillermoFind your dream job
Sign up now and join over 85,000 remote workers who receive personalized job alerts, curated job matches, and more for free!
