Available to hire
Hi, I’m Javier, a mobile developer and software QA engineer who enjoys turning ideas into reliable apps and smooth user experiences. I thrive on writing clean code, designing robust test plans, and collaborating closely with product teams to ship features that matter.
Over the years I’ve worked on wearable-device projects, educational electronics, and Android apps, focusing on UI/UX, testing strategy, and backend data modeling with Firestore. I aim to bridge development and QA with practical automation and thoughtful releases to deliver value and keep users happy.
Skills
Language
Spanish; Castilian
Fluent
English
Fluent
Work Experience
Translator and Collaborator at Mikarimin. Multidisciplinary Scientific Journal
January 1, 2021 - December 31, 2021Translation and comprobation of 'Caracterización geográfica, ecoturística y ambiental de las playas de la zona urbana del cantón Manta' from Spanish to English, for publication in the 7th edition of Mikarimin on August 29th of 2021. Translation of the original content from Spanish to English. Comprobation of previously translated content by 3rd parties.
Design of a wearable device for personal location tracking on ESPOL campus at Escuela Superior Politécnica del Litoral (ESPOL)
January 1, 2023 - December 31, 2023Construction of an electronic system and enclosure for a wearable-like GPS device for locating all tagged places in the campus of ESPOL to facilitate new students’ mobilization through the campus. Enclosure Design. Electronic System Design. Algorithm Design (Arduino).
Construction and Installation of an Educational Electronic System for Kids at Guayaquil School Project
January 1, 2024 - December 31, 2024Led the follow-up, final assembly and on-site installation of an electronic educational system for a school in Guayaquil, ensuring correct dimensions, functionality and a successful handover. Performed detailed analysis of electronic components (through-hole and SMD) to confirm suitability and compatibility with the system design. Validated physical fit and usability for the target classroom, checking mounting, clearances and user interaction zones.
Development and publication of a multipurpose TTS app for android devices at Personal project (Android Text-to-Speech app)
January 1, 2025 - December 31, 2025Designed and shipped a multipurpose Android text-to-speech application to help people with verbal communication challenges communicate using a digital pen and touchscreen device. UI/UX Design; QA & Release: debugging, crash monitoring, Play Store packaging and app lifecycle management. Backend: architected Firestore data model for user profiles, phrases and settings; implemented secure read/write rules and offline sync. Growth: ran targeted ad campaigns and tracked acquisition metrics to optimize installs and engagement.
QA Software Tester at Tester Work
January 1, 2024 - PresentDesign and execution of comprehensive test plans for web and mobile products, validating functionality, APIs, and critical user flows. Integrate testing efforts with the development lifecycle and providing actionable test metrics to reduce production issues and improve release confidence. Design and execute functional and regression test cases for web and mobile applications. Report and manage bugs, prioritizing issues and validating fixes with developers. Produce test reports for product owners and stakeholders.
AI Testing at Productive Playhouse
January 1, 2025 - PresentUser testing, personally identifiable information (PII) filtering, localization reviewing, fact-checking. Performance evaluating. Machine translations reviewing. Full conversation feedback and rating.
Wearable Device Designer / Electronic System Designer at ESPOL Campus Project
January 1, 2023 - January 1, 2023Designed a wearable GPS-like device for personal location tracking on the ESPOL campus. Responsible for enclosure design, electronics architecture, and Arduino-based algorithm development to locate tagged places and assist new student mobility.
Project Lead - Educational Electronic System at Guayaquil School Project
January 1, 2024 - January 1, 2024Led follow-up, final assembly and on-site installation of an educational electronic system at a school in Guayaquil. Conducted component analysis, validated fit and usability, and delivered a successful handover.
Developer - Multipurpose Text-to-Speech App at Personal project / Google Play
January 1, 2025 - January 1, 2025Designed and shipped a multipurpose Android text-to-speech application to assist users with verbal communication challenges. Responsibilities included UI/UX design, QA & release management, and backend data modeling with Firestore; implemented secure read/write rules and offline sync; led growth campaigns and tracked acquisition metrics.
Education
EF SET Certificate at EF SET
January 1, 2016 - December 31, 2016Algorithm Designer at CADI F1
January 1, 2017 - December 31, 2017Java Course at CADI F1
January 1, 2017 - December 31, 2017Cellular Telephony and Tablet Technician Assistant with Emphasis on SMD at CYBERTRONICAGSM MobileTech
January 1, 2010 - December 31, 2017English Certificate at Piccadilly English Center
January 1, 2019 - December 31, 2019Employability Workshop at Escuela Superior Politécnica del Litoral
January 1, 2023 - December 31, 2023Electronic & Automation Engineering at Escuela Superior Politécnica del Litoral
January 1, 2021 - December 31, 2026Electronic & Automation Engineering at Escuela Superior Politécnica del Litoral
January 1, 2021 - January 1, 2026EF SET Certificate at EF SET
January 1, 2016 - January 1, 2016Algorithm Designer Certificate at CADI F1
January 1, 2017 - January 1, 2017Java Course at CADI F1
January 1, 2017 - January 1, 2017Cellular Telephony and Tablet Technician Assistant with Emphasis on SMD at CYBERTRONICAGSM MobileTech
January 1, 2010 - January 1, 2017English Language Certificate at Piccadilly English Center
January 1, 2019 - January 1, 2019Employability Workshop at Escuela Superior Politécnica del Litoral
January 1, 2023 - January 1, 2023Qualifications
EF SET Certificate
January 1, 2016 - December 31, 2016Algorithm Designer Certificate
January 1, 2017 - December 31, 2017Java Course
January 1, 2017 - December 31, 2017Cellular Telephony and Tablet Technician Assistant with Emphasis on SMD
January 1, 2010 - December 31, 2017English Certificate
January 1, 2019 - December 31, 2019Employability Workshop
January 1, 2023 - December 31, 2023Electronic & Automation Engineering
January 1, 2021 - December 31, 2026EF SET Certificate
January 1, 2016 - January 1, 2016Algorithm Designer Certificate
January 1, 2017 - January 1, 2017Java Course
January 1, 2017 - January 1, 2017CYBERTRONICAGSM MobileTech Certificate
January 1, 2010 - January 1, 2017English Language Certificate
January 1, 2019 - January 1, 2019Employability Workshop
January 1, 2023 - January 1, 2023Industry Experience
Software & Internet, Education, Media & Entertainment, Professional Services, Telecommunications
Skills
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