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I am a software engineer specializing in backend development with a strong focus on Ruby on Rails and Java. I have a solid understanding of relational databases and SQL, experienced in data modeling, query optimization, and efficient schema design. I have worked in corporate environments as well as on personal projects, building robust, scalable, and product-oriented solutions. I am familiar with continuous integration tools and Agile methodologies. I have a highly adaptable and collaborative mindset, with strong problem-solving skills. I work well closely with teams and product owners to define and implement client-focused features.…I am a software engineer specializing in backend development with a strong focus on Ruby on Rails and Java. I have a solid understanding of relational databases and SQL, experienced in data modeling, query optimization, and efficient schema design. I have worked in corporate environments as well as on personal projects, building robust, scalable, and product-oriented solutions. I am familiar with continuous integration tools and Agile methodologies. I have a highly adaptable and collaborative mindset, with strong problem-solving skills. I work well closely with teams and product owners to define and implement client-focused features.

Johannes Robayna

Web Developer, Programmer, Back-End Developer, +1

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I am a software engineer specializing in backend development with a strong focus on Ruby on Rails and Java. I have a solid understanding of relational databases and SQL, experienced in data modeling, query optimization, and efficient schema design. I have worked in corporate environments as well as on personal projects, building robust, scalable, and product-oriented solutions. I am familiar with continuous integration tools and Agile methodologies. I have a highly adaptable and collaborative mindset, with strong problem-solving skills. I work well closely with teams and product owners to define and implement client-focused features.…I am a software engineer specializing in backend development with a strong focus on Ruby on Rails and Java. I have a solid understanding of relational databases and SQL, experienced in data modeling, query optimization, and efficient schema design. I have worked in corporate environments as well as on personal projects, building robust, scalable, and product-oriented solutions. I am familiar with continuous integration tools and Agile methodologies. I have a highly adaptable and collaborative mindset, with strong problem-solving skills. I work well closely with teams and product owners to define and implement client-focused features.

Available to hire

I am a software engineer specializing in backend development with a strong focus on Ruby on Rails and Java. I have a solid understanding of relational databases and SQL, experienced in data modeling, query optimization, and efficient schema design. I have worked in corporate environments as well as on personal projects, building robust, scalable, and product-oriented solutions.

I am familiar with continuous integration tools and Agile methodologies. I have a highly adaptable and collaborative mindset, with strong problem-solving skills. I work well closely with teams and product owners to define and implement client-focused features.

Skills

Experience Level

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Language

Spanish; Castilian

Fluent

English

Advanced

Work Experience

Ruby on Rails Web Developer at GlobalEduca

January 1, 2025 - August 26, 2025

Developed internal features using Ruby on Rails with a focus on RESTful design and backend structure. Created modules such as notification bulletins, authorizations, and multilingual support for an educational platform. Built and maintained SQL database schemas including migrations, table creation, and schema updates. Worked in a fully Linux-based environment using Ubuntu, handling terminal tasks for Rails, local servers, and setup. Collaborated closely with developers and the product owner to align features with client needs.

Developer at FreelanceSolutions

January 1, 2023 - Present

Built a full-stack web platform using Ruby on Rails following the MVC architecture to ensure clean separation of concerns and scalable design. Enabled freelancers to publish multiple skill-based portfolios and negotiate project conditions with clients in real time. Implemented dynamic frontend features using Stimulus JS to improve user experience and responsiveness across key interface components.

Developer at Personal Project - Real-Time GPS Tracker

June 1, 2024 - August 26, 2025

Developed a real-time GPS tracking system integrating a physical GPS receiver that reads NMEA 0183 GPS strings and parses them into precise geographic coordinates. Built a custom parser to extract latitude and longitude from serial data achieving high accuracy in positioning. Applied principles of coordinate systems, datum transformations, and geospatial accuracy to ensure reliable navigation data.