Senior Software Engineer (ReactJS)

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).