Michael Reyes

Lead Frontend Specialist & Consultant

Developer passionate about technology, quality, continuous learning, design, and Japanese culture.

Location: Japan

handle: @mreysei
role: Lead Frontend Specialist & Consultant
location: Japan

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About me

Michael Reyes is a Lead Frontend Specialist & Consultant at Lean Mind, a consultancy specialised in TDD, best practices and agile methodologies for quality software development. With more than 10 years of experience in the field, he specialises in Next.js, Node.js and TypeScript, and has worked on projects of very different kinds: from mobile applications with Flutter to international e-invoicing solutions with C# and .NET. He works remotely from Tenerife with national and international teams.

His work rests on three pillars: rigorous technical development, team mentoring and the promotion of a quality culture. He applies best practices, agile methodologies and testing in all his projects, and as a consultant he has supported teams of up to fourteen people in adopting sustainable quality standards. He shares his experience in technical articles on the blog and programming exercises in the katas section. Beyond software, he is passionate about design and Japanese culture.

My journey

Lean Mind (opens in a new tab)
Company
Lead Frontend Specialist & Consultant
July 2018 – Present · 8 years, 4 months
Consultancy specialised in TDD, best practices and agile methodologies for quality software development.
14 projects
14 projects at Lean Mind
1. Voxel — Amadeus IT
  Dates
  April 2024 – Present
  Development of e-invoicing solutions compliant with the legislation of multiple countries. Implementation of regulatory logic, digital signatures and integration with tax agencies in a 14-person team.
  - C#
  - .NET
  - Azure
  - Oracle
  - xUnit
13 more projects at Lean Mind
1. Altra
  Dates March 2023 – March 2024
  Role
  Frontend Specialist & Consultant
  Technical mentoring and integration of quality standards in the development team of a health insurance management platform, with six people.
  - React
  - TypeScript
  - Tailwind CSS
  - TDD
  - Jest
2. Zinklar
  Dates August 2022 – March 2023
  Role
  Frontend Specialist & Consultant
  Technical mentoring in testing and quality culture in the team of a market research SaaS platform, with ten people.
  - React
  - TypeScript
  - TDD
  - Jest
3. Cryptalib
  Dates January 2022 – March 2022
  Role
  Software Developer
4. Alterna
  Dates February 2021 – December 2021
  Role
  Backend Developer
  Development and calculation of electricity and gas invoices in line with the 2021 Spanish regulations. PDF generation, automated email delivery and system instrumentation in a six-person team.
  - Node.js
  - TypeScript
  - Express
  - MySQL
  - TDD
5. Lean Mind Portfolio
  Dates December 2020 – February 2021
  Role
  Software Developer
  Renewal of the company’s corporate portfolio. Layout, design and gathering of information about projects, team and articles.
  - Hugo
  - HTML5
  - CSS
  - JavaScript
6. Barkibu
  Dates September 2019 – December 2020
  Role
  Mobile Developer
  Development of a mobile app for pet care and health insurance with an international presence. Implementation of real-time chat and consumption of machine learning data in an eight-person team.
  - Flutter
  - Dart
  - BLoC
  - Android
  - iOS
  - TDD
7. Darkmatter
  Dates August 2019 – September 2019
  Role
  Software Developer
  Development of the backoffice of an encrypted data platform, with data visualisation and testing in a two-person team.
  - React
  - TypeScript
  - CSS Modules
  - TDD
  - Jest
8. Deliverea
  Dates June 2019 – August 2019
  Role
  Android Developer
  Development of a mobile app for delivery drivers of Volkswagen vehicle spare parts, with Zebra barcode scanner integration in a four-person team.
  - Android
  - Kotlin
  - MVVM
  - JUnit
  - TDD
9. AllInOneDoctor
  Dates April 2019 – June 2019
  Role
  Software Developer
  Migration of the backoffice of a support platform for healthcare professionals, with development on top of the previous system and testing in a two-person team.
  - React
  - TypeScript
  - CSS Modules
  - TDD
  - Jest
10. Toogethere
  Dates March 2019 – April 2019
  Role
  Apprentice
  Needs analysis and design validation for a tourist package platform. Requirements gathering with the client in a four-person team.
  - Trello
  - Figma
11. Papagayo
  Dates January 2019 – February 2019
  Role
  Apprentice
  Modification of the profile module in the mobile app of a luxury beach club and nightclub in Tenerife. Module update and requirements gathering with the client in a two-person team.
  - Ionic
  - Angular
  - TypeScript
  - HTML5
  - CSS
12. B-Wom
  Dates October 2018 – January 2019
  Role
  Android Developer
  First mobile project at Lean Mind. Development of a self-care app for women’s intimate health in a five-person team.
  - Android
  - Java
  - JUnit
  - TDD
13. Lean Mind Portfolio
  Dates July 2018 – September 2018
  Role
  Apprentice
  First project at Lean Mind. Development of the corporate portfolio, with layout, design and gathering of information about projects, team and articles.
  - Hugo
  - HTML5
  - CSS
  - JavaScript
Omnia Infosys
Company
Web Developer
December 2017 – April 2018 · 5 months
Technology services and digital consultancy company for the public and private sectors of the Canary Islands.
1 project
1 project at Omnia Infosys
1. University of La Laguna
  Dates
  December 2017 – April 2018
  Migration of the institutional website of the Canary Islands public university to the new WordPress design. Adaptation of content and styles.
  - WordPress
  - PHP
  - HTML5
  - CSS
Bakata Solutions
Company
Full-Stack Developer · Internship
March 2017 – December 2017 · 10 months
Custom software development company for local businesses in Tenerife.
1 project
1 project at Bakata Solutions
1. Backgrid CRM
  Dates
  March 2017 – December 2017
  Implementation of a custom CRM with invoicing, calendar and reporting modules. Tailor-made development based on the client’s needs, with responsive layout.
  - C#
  - ASP.NET MVC
  - Razor
  - HTML5
  - CSS
CIFP César Manrique
Education
Higher Diploma in Web Application Development (DAW)
September 2015 – June 2017 · 1 year, 10 months
Official technical training in full-stack web development. Building applications with HTML, CSS, JavaScript, PHP and Java, with a complete web application as the final project.
mreysei
Freelance
Freelance Web Developer
January 2014 – August 2015 · 1 year, 8 months
First projects as an independent developer, working with clients in the digital entertainment sector.
1 project
1 project at mreysei
1. Browser game
  Dates
  January 2014 – August 2015
  Interface design and layout for a browser game, with a focus on user experience.
  - PHP
  - HTML5
  - CSS
  - JavaScript

Testimonials

It is a privilege to have had the opportunity to work closely with Michael, an experience I value deeply in terms of both personal and professional development. Michael stands out as a professional…
Aitor Reviriego Amor
Software Developer | Refactoring, TDD & Code Quality
October 2025
Written in Spanish · translated
It is a privilege to have had the opportunity to work closely with Michael, an experience I value deeply in terms of both personal and professional development.
Michael stands out as a professional who not only fits perfectly into a team, but also has the unique ability to multiply its collective value and capacity. His presence creates a positive ripple effect that strengthens the team’s structure and resilience.
His contribution rests on three fundamental pillars. He shows undeniable technical excellence; his development work is characterised by its quality, sustainability and robustness, tackling challenges with skills that guarantee effective and scalable solutions. Added to this is his positive leadership; he has innate qualities for raising the group’s performance and is a key piece in creating an optimal, collaborative working environment, which fosters maximum productivity. Finally, faced with any obstacle, he shows an excellent ability to solve problems that combines speed, calm and precision, ensuring that projects move forward without significant delays.
Michael is an asset of incalculable value and a catalyst for success. I strongly recommend his talent and his positive impact to any organisation seeking superior performance, both on the technical side and in the cohesion and teamwork of high-performing teams.
Aitor Reviriego Amor
Software Developer | Refactoring, TDD & Code Quality
October 2025
Written in Spanish · translated
I had the privilege of having Michael as my mentor during my internship, and since then, he has continued to be a constant source of guidance and inspiration in my career. His deep technical knowledge…
Roberto del Pino Hormiga
Backend Developer, SaludOnNet
October 2025
I had the privilege of having Michael as my mentor during my internship, and since then, he has continued to be a constant source of guidance and inspiration in my career. His deep technical knowledge and ability to explain complex concepts with clarity and pragmatism make him an exceptional teacher and teammate. Every time I face a challenge or have a question, he always takes the time to help, ensuring I not only understand the solution but also the reasoning behind it.
Michael is the kind of developer who combines technical excellence with outstanding soft skills. He’s passionate about clean, maintainable code and has a strong grasp of software design principles and best practices. He has also worked on multiple projects across different sectors, providing him with valuable technical and business knowledge.
Roberto del Pino Hormiga
Backend Developer, SaludOnNet
October 2025
Michael is a great team player. He is a front-end specialist, but he could other king of things, for example back-end or iac (infrastructure as code). He has deep knoledge about quality code, he…
Luis Gabriel Rodríguez Alejos
Software Developer, Lean Mind
October 2025
Michael is a great team player. He is a front-end specialist, but he could other king of things, for example back-end or iac (infrastructure as code).
He has deep knoledge about quality code, he knows a lot of patterns, principles and practices.
He really has very sharped soft skills, he understands the necesities of each team members.
Otherwise, He is a very good teacher and mentor, he has the capacity to teach with pragmatism in mind.
It is a pleasure of working with.
Luis Gabriel Rodríguez Alejos
Software Developer, Lean Mind
October 2025
I had the privilege of working with Michael for a year on a critical technology migration project, in which we transformed our platform from Nuxt into a modern architecture based on Turborepo with…
Diego Andrades
Technical Project Manager | Teams · Delivery · Product
September 2025
Written in Spanish · translated
I had the privilege of working with Michael for a year on a critical technology migration project, in which we transformed our platform from Nuxt into a modern architecture based on Turborepo with Next.js.
Michael proved to be much more than a technical consultant. His ability to get deeply involved in strategic decision-making was incredible, always bringing a balanced view between business needs and technical excellence. He not only helped us with the migration, but also became a point of reference for our team.
His experience in Domain-Driven Design (DDD) and Test-Driven Development (TDD) transformed the way we work. Michael did not just recommend practices; he worked side by side with the team, teaching by example and making sure every member understood and adopted these fundamental principles. His teaching approach and his patience in explaining complex concepts were exceptional.
The resulting architecture not only met the technical goals, but also laid solid foundations for the future growth of our product. He helped the team gain autonomy and confidence.
I recommend Michael without hesitation for any project that requires technical evolution, scalable architecture and team development. Michael has deep technical expertise and mentoring skills that set him apart.
Diego Andrades
Technical Project Manager | Teams · Delivery · Product
September 2025
Written in Spanish · translated
Hello, Michael is a great teammate. I have worked with him and can say that his calmness, professionalism, and technical excellence truly stand out when driving projects forward. In his specialty…
Kevin Hierro Carrasco
Design Thinking | Lean | Craftsmanship
September 2025
Hello, Michael is a great teammate. I have worked with him and can say that his calmness, professionalism, and technical excellence truly stand out when driving projects forward. In his specialty, front-end development, he is unmatched, which results in happier clients thanks to the high quality of the UI. His seniority is not only technical but also social: he is attentive to the team’s atmosphere and actively seeks feedback to adapt to his role. In addition, he has strong collaborative skills in multicultural environments, which is particularly valuable.
Kevin Hierro Carrasco
Design Thinking | Lean | Craftsmanship
September 2025

See all 5 testimonials

GitHub activity

Contributions since 2016: 4,863; in 11 years
Contributions in the last 12 months: 2,828; 16 public commits and 2,811 private contributions
Repositories: 34; 12 public and 22 private

LessMore

Streaks and records of the last 12 months

Current streak: No active streak
Longest streak: 19 daysSep 16 – Oct 4, 2026
Best day: 487 contributionsSep 27, 2026
Best month: 1,414 contributionsSeptember 2026
Most active day: Sunday
Daily average: 7.62

Contributions per year and languages

Contributions per year

Contributions per year, from 2016 to 2026
Year	Contributions
2016	1
2017	31
2018	36
2019	190
2020	418
2021	76
2022	4
2023	84
2024	600
2025	698
2026 (so far)	2,725

2026 (so far)

Most used languages in my repositories

TypeScript57.3%
Dart27.8%
JavaScript5.3%
CSS3.6%
Astro1.6%
PostgreSQL1%
Others3.4%

Projects

¡Decídete!
Mobile app2026Featured
Decide between two options based on the preferences and importance you choose.
- Flutter
- Dart
- SQLite
- Android

See all projects

Contact

Shall we talk?

If you have a project, an idea or a question, write to me.

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Michael Reyes

About me

My journey

Voxel — Amadeus IT

Altra

Zinklar

Cryptalib

Alterna

Lean Mind Portfolio

Barkibu

Darkmatter

Deliverea

AllInOneDoctor

Toogethere

Papagayo

B-Wom

Lean Mind Portfolio

University of La Laguna

Backgrid CRM

Browser game