Senior Software Engineer (ReactJS)

Important:This role is open only to candidates currently living in Mexico or Latin America. Applications from other regions will not be considered.

Join MagmaLabs, a leading provider of expert software engineers dedicated to helping companies achieve their goals across diverse and impactful industries. We are actively seeking a seasoned Senior Software Engineer (ReactJS) to join our fully remote team.

In this pivotal role, you will apply your expertise in modern frontend and full-stack development to build scalable, high-performance web applications. You will collaborate with clients across healthtech, e-commerce, fintech, and other innovative sectors, delivering robust and intuitive user experiences powered by ReactJS and modern web technologies.

You will play a key role in designing, developing, and maintaining scalable frontend architectures while contributing to backend integrations and full-stack solutions that directly impact business success.

About the Role

Are you a seasoned Senior Software Engineer (ReactJS) passionate about building modern, scalable, and high-performance web applications?

Join our fully remote team and take ownership of designing and developing sophisticated frontend systems while contributing to full-stack architectures. You will shape the future of our products by making key architectural decisions that enhance user experience, performance, accessibility, and long-term scalability.

You will drive engineering best practices, ensuring our SaaS platforms, e-commerce systems, and high-traffic applications maintain exceptional quality, performance, and maintainability.

If you thrive on solving complex problems using ReactJS, modern JavaScript/TypeScript ecosystems, and cloud-native technologies, we want to hear from you.

Responsibilities

Lead the architectural design, development, and continuous improvement of scalable frontend applications using ReactJS and TypeScript.
Design and implement reusable, maintainable, and testable UI components following modern design patterns.
Collaborate on full-stack implementations, integrating frontend applications with RESTful and/or GraphQL APIs.
Ensure optimal application performance, accessibility (WCAG standards), and cross-browser compatibility.
Contribute to backend integrations and server-side logic (Node.js or other backend technologies as required).
Optimize application performance using modern techniques such as code splitting, lazy loading, memoization, and performance monitoring.
Ensure code quality through automated testing (Jest, React Testing Library, Cypress or similar).
Participate in code reviews, maintain high engineering standards, and mentor junior engineers.
Collaborate closely with product managers, designers, and cross-functional teams to translate business requirements into technical solutions.
Contribute to DevOps practices including CI/CD pipelines, Docker-based workflows, and cloud deployments (AWS, GCP, or Azure).
Maintain clear and comprehensive technical documentation.
Proactively identify technical debt and lead refactoring initiatives to improve scalability and maintainability.

Requirements

Minimum of 7 years of software development experience, with at least 4–5 years focused extensively on ReactJS and modern frontend ecosystems.
Strong proficiency in JavaScript (ES6+) and TypeScript.
Deep understanding of ReactJS fundamentals, hooks, state management patterns, and component-driven architecture.
Experience with state management solutions (Redux, Zustand, Context API, or similar).
Solid understanding of frontend architecture patterns and scalable project structure.
Experience integrating with RESTful and/or GraphQL APIs.
Working knowledge of backend technologies (Node.js preferred) and full-stack development principles.
Strong understanding of HTML5, CSS3, responsive design, and modern styling solutions (Styled Components, TailwindCSS, CSS Modules, etc.).
Experience with version control systems (Git) and collaborative workflows.
Familiarity with automated testing strategies and testing frameworks.
Experience working in Agile environments (Scrum, Kanban, etc.).
Strong problem-solving skills and the ability to work independently in a remote-first environment.
Excellent English communication skills (written and spoken).
Proven ability to collaborate effectively across time zones and distributed teams.

Bonus Points If You Have

Experience with Next.js or other React-based frameworks.
Knowledge of server-side rendering (SSR) and static site generation (SSG).
Experience with microfrontend architectures.
Familiarity with cloud platforms (AWS, GCP, Azure).
Experience with Docker, Kubernetes, or infrastructure-as-code.
Understanding of performance monitoring tools and observability practices.
Exposure to design systems and scalable component libraries.
Experience contributing to technical leadership or architectural decisions in high-growth environments.

About Us

We are a team of innovative software professionals dedicated to delivering high-quality solutions across diverse industries. With a proven track record of success, we prioritize excellence, creativity, and the continuous growth of our team members.

We are committed to professional development, mentorship, and fostering a culture of technical excellence. Join us to work on impactful projects, collaborate with talented engineers, and advance your career as a Senior Software Engineer (ReactJS).

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