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Humberto Martinez

@humbertomartinez

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I’m a frontend developer specializing in React and Angular, delivering performant, maintainable web applications.

Belarus

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What I'm looking for

I’m looking for a frontend-focused role (React/Angular) building performant, user-centered web apps, collaborating cross-functionally, mentoring juniors, and growing into technical leadership within a team that values clean code and testing.

I am a software developer with seven years of experience, including five years specializing as a Frontend Developer. I build user-focused web applications using JavaScript, HTML, and CSS and prioritize performance and usability.

I have delivered production applications with React, Angular and Next.js, collaborated with backend teams to integrate RESTful APIs, and performed backend work with NestJS, Express, MongoDB and MySQL. I’ve driven performance and UX improvements and applied testing with Jest, React Testing Library and Cypress to raise quality. Notable projects include ReMake, Lanetalk admin and tickets portals, and contributions to MakerDAO MIPs.

I follow clean code, design patterns and Feature-Sliced Design to keep code maintainable and scalable. I speak Spanish natively and hold C2-level English, and I’m eager to join a team where I can mentor others and drive frontend excellence.

Experience

Work history, roles, and key accomplishments

Frontend Developer

OpsTalent

Nov 2020 - Mar 2025 (4 years 4 months)

Developed and maintained React and Angular web applications, improving performance and user experience across product lines.

React Angular JavaScript TypeScript RESTful APIs Performance Optimization React Query Redux

Frontend Developer

DSpot Sp. z o.o.

Jan 2021 - Jan 2023 (2 years)

Built responsive React and Angular applications and collaborated with designers to implement UI/UX, enhancing code quality and maintainability.

React Angular JavaScript TypeScript Material UI Responsive Design NestJS MongoDB

Full-stack Developer

Cinesoft

Mar 2020 - Nov 2020 (8 months)

Developed full-stack applications using Angular, Express.js, and MySQL and implemented RESTful APIs and database schemas ensuring security and performance.

Angular MySQL RESTful APIs JavaScript Backend Development Security Performance

Full-stack Developer

Freelancer

Feb 2019 - Dec 2019 (10 months)

Created web applications using Angular, Laravel, and MySQL and designed backend services and APIs for client projects.

Angular Laravel PHP MySQL JavaScript RESTful APIs Backend Development

Software Developer

Informatic Science University

Jun 2017 - Nov 2018 (1 year 5 months)

Implemented algorithms for pattern recognition and text categorization and developed image analysis algorithms for object detection using Scikit-learn and OpenCV.

scikit learn OpenCV Python C#Machine Learning Algorithms