Senior MERN Stack Architect - Remote, High-Impact Web

Proxify; Portugal; On-site; EUR 60,000 - 90,000; Full time

Benefits offered by this job

On-time payments

Flexible withdrawal options

8-hour work days

Flex days off per year

Job summary

Proxify is seeking a Senior MERN Stack Developer to architect, scale, and maintain high-throughput web applications for a high-growth client. You will own front-end interfaces and back-end services, connecting to scalable databases and cloud infrastructure.

You should have 5+ years of experience with MongoDB, Express, React, and Node, plus expertise in RESTful APIs, JWT/OAuth, and CI/CD with Docker and AWS.

Qualifications

• 5+ years of professional software engineering experience designing, building, and deploying end-to-end applications using MongoDB, Express.js, React.js, and Node.js.
• Deep mastery of React internals, custom hooks, component design patterns, state management, SSR/SSG frameworks, and performance optimization.
• Proven experience architecting scalable RESTful APIs, WebSockets, and/or GraphQL services; middleware design and authentication protocols.

Responsibilities

• Design, develop, and deploy scalable full-stack features from initial database schema creation to polished React interfaces.
• Build secure, high-concurrency microservices and web services; manage integrations with third-party APIs and real-time channels.
• Audit, profile, and optimize application throughput; reduce bundle sizes and optimize database queries and caching layers.

Skills

MERN stack

React.js

Node.js

RESTful APIs

JWT/OAuth2

Docker

AWS

Tools

Next.js

Remix

Prisma

Mongoose

GitHub Actions

Job description

Proxify is seeking a Senior MERN Stack Developer to architect, scale, and maintain high-throughput web applications for a high-growth client. You will own front-end interfaces and back-end services, connecting to scalable databases and cloud infrastructure.

You should have 5+ years of experience with MongoDB, Express, React, and Node, plus expertise in RESTful APIs, JWT/OAuth, and CI/CD with Docker and AWS.