Senior Full Stack Engineer (React / Next.js) Join to apply for the Senior Full Stack Engineer (React / Next.js) role at MultiSafepay
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What you’ll do - Design and implement high-quality, scalable frontend features with React and Next.js
- Work closely with designers, PMs, and engineers to deliver seamless user experiences
- Contribute to backend development with Node.js (ideally NestJS)
- Model and optimize databases with PostgreSQL (schemas, queries, migrations)
- Define system architecture, feature design, and data flow across the stack
- Integrate APIs and work with headless commerce platforms like MedusaJS
- Write clean, maintainable, and well-tested code
- Mentor and guide mid-level and junior developers
- Take ownership of features from concept through to production
Job requirements - 5+ years of professional web development experience
- Deep expertise in React and Next.js (SSR, SSG, routing, performance tuning)
- Hands-on with Node.js (NestJS a strong plus)
- Solid knowledge of PostgreSQL (schemas, queries, optimization)
- Experience with system design, feature architecture, and data flow modeling
- Comfortable with REST and/or GraphQL APIs
- Familiarity with eCommerce frameworks like MedusaJS (or Shopify Headless, Saleor)
- Strong problem-solving skills and ability to thrive in a fast-paced, collaborative environment
- Excellent communication skills in English
Nice to have - Production experience with React Native
- Experience with headless commerce ecosystems
- Exposure to Docker, CI/CD pipelines, and AWS
- Contributions to open-source projects
What do we offer you?
- A competitive salary package
- Opportunities for professional growth
- A diverse role within a dedicated international team of enthusiastic colleagues
- Office with an amazing view of the beach
- Health insurance
- Free Spanish classes and afterwork sports activities
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