Full-Stack Developer

Just Vargas is a human resources consultancy that recruits, trains, and supports talent, helping both companies and professionals reach their full potential.

We are recruiting for a leading company in the technology sector that combines digital innovation with high-impact physical products. We are looking for a Full Stack Developer that will take ownership of the design, development, and scaling of our core services, APIs, and user interfaces, while contributing to CI/CD practices and ensuring the performance and reliability of our systems.

Key Responsibilities:

• Design, develop, and deploy highly performant and secure RESTful/GraphQL APIs using Node.js and frameworks like Express.js or NextJS;
• Ensure data integrity and performance of MongoDB, including schema design, indexing, and query optimization;
• Develop and maintain responsive, interactive user interfaces using React and related libraries (e.g., Redux, Context API);
• Collaborate with frontend and backend engineers to integrate user-facing elements with server-side logic;
• Write and maintain comprehensive unit, integration, and end-to-end tests;
• Work with Docker and containerization technologies for consistent development, staging, and production environments;
• Monitor service performance, troubleshoot production issues, and perform root cause analysis;
• Contribute to automation, utility scripting, and data migration tasks (primarily in Python when necessary);
• Participate actively in code reviews, promoting technical excellence and continuous improvement;
• Identify bottlenecks and propose architectural enhancements to improve scalability and efficiency.

Requirements

• Proven professional experience in full stack development;
• Expertise and practical experience with Node.js and understanding of asynchronous programming (callbacks, Promises, async/await);
• Strong knowledge of MongoDB (data modeling, indexing, query optimization);
• Proficiency in React (components, state management, hooks);
• Experience implementing and managing CI/CD pipelines;
• Familiarity with Docker and cloud services;
• Experience or comfort with Python for scripting and automation tasks;
• Ownership mentality: ability to take responsibility for features from concept to production;
• Proactive and autonomous: excels in a small team requiring self-direction;
• Strong communicator: can explain technical complexities and collaborate with non-technical stakeholders;
• Passion for delivering robust, scalable systems in a fast-paced environment.