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Mako K.MK

Mako K.

Report & BI Specialist | Web System Engineer with

€280/day
Valladolid, ES
3-7 years

Average response time: 1 hour

About Mako

Data Visualization & Reporting Specialist with a Master’s in Environmental Studies, I have strong 4 years expertise in data analysis, aggregation, and visual storytelling through BI tools and report systems.
I specialize in creating graphs with AWS QuickSight and reports using JasperReports + SQL, based on complex database structures.

If you wish to create reports using JasperReports and SQL, please prepare layout diagrams and data design item definition sheets. A single report layout typically takes about one week to complete. As I gain familiarity with your requirements, multiple layouts can be delivered within a week. The time required depends on the complexity of the data structure.


I can also prepare the layout diagrams and definition sheets on your behalf; however, this will require additional effort and a consultation session to clarify details.

Feel free to contact me via chat or email — I can share draft PDFs or example files in advance to help you visualize the outcome.

Preferably on an hourly contract with a predefined monthly engagement,
I’m generally available for about 20 hours per month, though flexible depending on the project’s needs.



Currently available for project-based or spot tasks — I aim to deliver clean, meaningful, and ready-to-use visual outputs.

Portfolio and blog are here :

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4 años de specialista en Visualización de Datos con maestría en Estudios Ambientales. Experiencia en análisis y visualización con AWS QuickSight y JasperReports + SQL.

Para informes en JasperReports, necesito diagramas de layout y definiciones de datos. Un informe toma aprox. una semana. Con experiencia, puedo entregar varios por semana, según la complejidad.

También puedo preparar esos documentos, pero requiere más tiempo y una reunión.

Disponible por proyecto o por horas (20h/mes aprox., flexible).
Puedo enviar ejemplos en PDF antes de iniciar.

Contácteme por chat o email.
Entrego resultados claros y listos para usar.
  • Japanese

    Native or bilingual

  • English

    Conversational

  • Spanish

    Basic

Remote only
Primarily works remotely

Experience

  • TOKYO Co., Ltd.
    Full-Stack Web Engineer | Reporting, BI, and React Troubleshooting
    DIGITAL AND IT
    September 2022 - May 2025 (2 years and 8 months)
    Tokyo, Japan
    Me especializo en el desarrollo de informes y paneles para sistemas empresariales.
    Con experiencia en JasperReports y SQL, puedo diseñar o modificar informes complejos rápidamente según la estructura de su base de datos.

    También tengo experiencia con herramientas BI como AWS QuickSight, y puedo crear visualizaciones intuitivas y paneles que apoyen la toma de decisiones.

    Ya sea para informes, gráficos o integración de dashboards en sistemas web (por ejemplo, con React), estoy disponible para trabajo flexible por proyecto.

    Puedo comprender su estructura de datos rápidamente y entregar resultados de alta calidad en plazos ajustados.

    ーーー

    I specialize in report and dashboard development for business systems.
    With experience in JasperReports and SQL, I can quickly design or modify complex reports based on your database structure.
    I also have experience with BI tools such as AWS QuickSight, and can create intuitive data visualizations and dashboards to support business decisions.
    Whether you need short-term support for reporting, chart creation, or embedding dashboards into web systems (e.g., using React), I’m available for flexible, project-based work.
    I can quickly understand your data structure and deliver high-quality output within tight deadlines.

    JasperReports QuickSight MySQL React.js Laravel
  • Sekiguchi Electric Co., Ltd.
    Software Developer Skilled in Microcontroller QA and Desktop UI (VB)
    DIGITAL AND IT
    April 2021 - September 2022 (1 year and 5 months)
    Tokyo, Japan
    Soy ingeniero de software con experiencia en pruebas de sistemas embebidos y desarrollo de aplicaciones de escritorio.

    En el departamento de diseño de software, desarrollé programas de prueba en C para placas con microcontroladores, garantizando la confiabilidad y funcionalidad del hardware embebido.

    También creé herramientas de escritorio con Visual Basic para apoyar pruebas internas y la gestión de datos.

    Mi perfil combina pruebas de bajo nivel con lógica de aplicaciones orientadas al usuario, lo que me permite adaptarme a diversos entornos de desarrollo.

    Estoy interesado en aplicar mis habilidades en proyectos a corto o largo plazo, especialmente en QA de software, automatización de pruebas y creación de herramientas de escritorio.

    ーーー

    I am a software engineer with experience in embedded system testing and desktop application development.
    During my time in the software design department, I developed test programs in C for microcontroller-based circuit boards, ensuring the reliability and functionality of embedded hardware.
    I also created desktop tools using Visual Basic to assist internal testing and data management.
    My background bridges both low-level testing and user-facing application logic, making me adaptable in a variety of development environments.
    I am eager to apply my skills to both short-term and long-term projects, especially those involving software QA, testing automation, and desktop tool creation.


    Microsoft Excel SQLServer C++ VBA automation

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Education

  • Master Degree
    Soka University
    2020
    Environmental Technorogy
  • Master Degree
    Valladolid University
    2020
    Environmental Technorogy

Certifications

Skill set

Categories