MERN Developer

Novelus; Argentina; On-site; ARS 1,800,000 - 3,600,000; Full time

Job summary

Novelus is seeking an experienced full-stack engineer to design, build, and maintain production web applications using the MERN stack. You will develop scalable RESTful APIs with Node.js/Express, and craft responsive React UI components focused on usability and maintainability.

You will collaborate with product teams, ensure code quality through testing and security reviews, and participate in Agile ceremonies. Experience with Azure DevOps, Docker, and TypeScript is a plus.

Qualifications

• Proven experience building production web apps with MERN stack (MongoDB, Express.js, React, Node.js).
• Solid experience designing RESTful APIs using Node.js + Express.js.
• Strong React skills with hooks and component architecture; practical state management.
• Working knowledge of TypeScript in React/Node codebases.
• Experience with MongoDB schemas, indexing, and query optimization.
• Hands-on CI/CD using Azure DevOps YAML pipelines for React/Node services.
• Understanding of JWT/OIDC authentication and secure API patterns.

Responsibilities

• Design, develop, and maintain full-stack web applications using the MERN stack.
• Build scalable, secure RESTful APIs and backend services.
• Develop responsive UI components in React with emphasis on usability and maintainability.
• Collaborate with product managers and engineers to translate requirements into technical solutions.
• Ensure code quality through testing, reviews, performance tuning, and security best practices.
• Integrate third-party APIs and internal services; troubleshoot across frontend, backend, and DB.

Skills

MERN stack

RESTful APIs

React hooks

Node.js

Express.js

TypeScript

JWT/OIDC security

Git & PRs

CI/CD pipelines

Azure DevOps

Agile / Scrum

Tools

Docker

Next.js

Camunda

Pronghorn

Job description

• Design, develop, and maintain full-stack web applications using the MERN stack
• (MongoDB, Express.js, React, Node.js)
• Build and maintain scalable, secure, high-performance RESTful APIs and backend
• services.
• Develop responsive, reusable UI components in React, emphasizing usability and
• maintainability.
• Design and optimize MongoDB data models, indexes, and queries to support
• application performance and scalability.
• Collaborate with product managers, designers, and engineers to translate business
• requirements into well-scoped technical solutions.
• Ensure high-quality deliverables through testing, code reviews, performance tuning,
• and security best practices.
• Integrate and maintain third-party APIs and internal services.
• Troubleshoot and resolve issues across the stack (frontend, backend, database,
• CI/CD).
• Contribute to technical documentation, knowledge sharing, and continuous
• improvement.
• Participate in Agile ceremonies (planning, standups, retrospectives) and deliver
• iteratively.

What You'll Need:

• Proven experience building production web applications using the MERN stack
• (MongoDB, Express.js, React, Node.js)
• maintainable code.
• Solid experience designing and implementing RESTful APIs using Node.js +
• Express.js.
• Strong React skills including hooks, component architecture, and practical state
• Working knowledge of TypeScript (able to read/write TS in a React/Node codebase).
• Experience integrating backend services with MongoDB (schemas, query
• optimization, indexing).
• Hands-on experience with CI/CD pipelines, including Azure DevOps (ADO) YAML
• pipelines for React/Node services.
• Strong troubleshooting and debugging skills; able to quickly read and improve
• existing code.
• Strong understanding of authentication/authorization (e.g., JWT, OAuth/OIDC) and
• secure API patterns.
• Proficiency with Git and collaborative workflows (PRs, reviews, branching
• strategies).
• Familiarity with cloud fundamentals—especially Azure concepts relevant to
• deploying and operating web services.
• Ability to work effectively in an Agile, cross-functional environment with strong
• ownership and communication.

Nice To Have:

• Experience with Next.js or other React frameworks.
• Experience with one or more React state libraries (Redux, Zustand, etc.)
• Experience with Docker and container-based workflows.
• Deeper experience with DevOps tooling beyond pipelines (infra-as-code,
• monitoring/observability, release automation).
• Experience with workflow/BPM engines (e.g., Camunda (BPMN)) or similar
• orchestration platforms (including Pronghorn).
• Experience with alternative clouds (AWS/GCP) in addition to Azure.