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Job · Senior

Fullstack Developer

Fullstack Developer • Senior • Remote • Full-time Poland Poland

Builds complex, high-impact features on Fundraise Up's global fundraising platform using Node.js, React, and TypeScript, from dynamic donation widgets to data-driven admin dashboards.

Responsibilities

  • Design, build, and maintain resilient frontend and backend features using React and Node.js
  • Develop core products, including donation checkouts, embeddable widgets, and donor/partner 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
  • Mentor peers by conducting thoughtful code reviews and providing constructive feedback
  • Partner with product managers and designers to clarify requirements
  • Proactively identify and resolve bugs and performance bottlenecks

Requirements

  • Strong expertise in Node.js, React, and TypeScript

Soft skills

Teamwork and knowledge sharing within the engineering teamMentoring and giving constructive feedback

About the company

Fundraise Up is a global fundraising platform built to make donating to nonprofits fast, seamless, and accessible. The backend runs on Node.js (Koa, NestJS) and MongoDB; the frontend uses Webpack, Vue.js, and React, written almost entirely in TypeScript. Kafka and Bull (Redis) handle high-throughput messaging, ClickHouse stores analytics data, and Elasticsearch powers search. The 160+ person, 80+ engineer distributed team is based mainly across Spain, Poland, Portugal, Georgia, Armenia, Serbia, Turkey, and Cyprus.

Languages: Orosz: csapatnyelv

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