Senior Fullstack Developer (React / Next to Node.JS)

• Are you passionate about making an impact in one of the most dynamic tech sectors – payments in Europe?

• Do you thrive in a fast-paced scale-up environment, surrounded by an ambitious and creative team?

We’re looking for a Senior Fullstack Engineer with deep expertise in React and NextJS to join our team!

You’ll be hands-on in designing and developing features across the stack — from sleek frontends to backend services and database architecture — while ensuring scalability, maintainability, and performance. If you also have React Native experience, that’s a huge plus, as we maintain several mobile apps that would benefit from your skills. Our current stack includes React, NextJS, NodeJS, NestJS, PostgreSQL, and integrations with headless commerce platforms like MedusaJS.

We’re on a mission to make payments simple, secure, and accessible for every business. With powerful in-house technology and deep expertise, our modular platform brings online, in-person, and cross-border payments together in one place — giving merchants the flexibility to scale on their own terms. Through a partnership-first approach, we tackle complexity head-on, keep payments running smoothly, and boost success rates. It’s how we level the playing field for businesses of all sizes and ambitions.

Join a leading tech company driving innovation in the payments industry. You’ll work with global leaders like Visa and Mastercard, as well as next generation “pay later” solutions such as Klarna and Afterpay. Our engineering teams apply Domain-Driven Design (DDD) principles, microservices architecture to build scalable and maintainable systems.

What will you be doing?

• 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 production release

• 5+ years of professional web development experience

• Deep expertise in React and Next.js (SSR, SSG, routing, performance tuning)

• Strong in JavaScript/TypeScript

• 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

• Proficiency in English, with strong communication skills

• 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

About MultiSafepay

MultiSafepay is a leading payment service provider, offering omnichannel and advanced payment solutions to businesses across Europe. We are innovative and fast-growing, building powerful solutions that transform the way our clients do business. We focus on delivering real solutions to their challenges and always stay ahead of the curve. In short, we are a true FinTech.

Join our dynamic team at our international office in beautiful Estepona, Málaga, and be a part of our journey towards global success.

We are not accepting applications or referrals from recruitment agencies for this position. Any unsolicited resumes will not be considered.