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# Fullstack Developer

- **Company:** Fundraise Up
- **Location:** Spain (Remote available)
- **Salary:** €58,800.0 - €73,200.0
- **Contract:** Permanent contract
- **Skills:** JavaScript (Programming Language), Artificial Intelligence, Cloud Computing, Profiling, Code Review, Elasticsearch, MongoDB, Node.Js, Performance Tuning, ReactJS, Backend, Vue.js, Webpack, Vertica, NestJS, Docker
- **Published:** August 15, 2026
- **Apply:** https://es.trabajo.org/oferta-4111-e12d64a3def6682b91925cf6b07a3803

## About the Role

development experience. Deep understanding of modern JavaScript (event loop, closures, promises, prototypes). Expert-level proficiency with React and its ecosystem (familiarity with Vue is a plus). Strong backend expertise with Node.js (experience with Koa or NestJS is highly preferred). Experience with Webpack configuration, performance optimization, and profiling. A keen eye for detail and a high sense of ownership and accountability for your work. Nice to Have Experience with MongoDB, ClickHouse, or Elasticsearch. Familiarity with Docker, CI/CD pipelines, or cloud infrastructure. Contributions to open-source projects or a strong personal portfolio. Bonus points Curiosity and a hypothesis-driven mindset. Ability to communicate complex analytical concepts to non-technical audiences. Detail-oriented with a strong sense of ownership. Comfort working in fast-paced, data-rich environments. Why work with us A strong, collaborative product team that owns what it, workspace. Co-working. Remote working. Please note: All official correspondence from Fundraise Up will exclusively originate from the @fundraiseup.com domain. Exercise caution and ensure the authenticity of emails claiming to be from our company. We are an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. We do not discriminate on the basis of race, color, religion, gender, sexual orientation, gender identity or expression, age, national origin, disability, or any other characteristic protected by applicable law in the countries where we operate.

## Description

portals. Architect and develop system components that scale across millions of monthly transactions. Write clean, well-documented, and thoroughly testable code. Drive architecture and technical design discussions to find elegant solutions to complex problems. Mentor peers by conducting thoughtful code reviews and providing constructive feedback. Partner with product managers and designers to clarify requirements and shape the roadmap. Proactively identify and resolve bugs, performance bottlenecks, and optimization opportunities. At Fundraise Up, AI is a default tool, not an experimental one. We expect every team member to actively use AI in their day-to-day work, identify where AI can change the shape of problems in their function, and grow their fluency as the tools evolve. You should already be using AI meaningfully in your work and understand where it adds value and how it can improve the way you operate. Requirements 7+ years of professional fullstack


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