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Fundraise Up Logo Fundraise Up · IT - Software Development

Senior Fullstack Developer

Armenia · Job Posted December 08, 2025
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Job Description

As a Senior Fullstack Developer, you will be a key contributor to our core product, building and scaling features that are central to the donation experience for millions of users. You'll leverage your expertise in Node.js, React, and TypeScript to develop complex components—from dynamic donation widgets to data-driven admin dashboards—with a relentless focus on code quality, scalability, and user experience.

Job Responsibility

  • Design, build, and maintain resilient frontend and backend features using React and Node.js
  • Develop our 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 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

Requirements

  • 7+ years of professional fullstack 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
  • 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

What we offer

  • 31 days off
  • 100% paid telemedicine plan
  • Home Office Setup Assistance: the company offers assistance with purchasing furniture (office chair, office desk, monitor) and other items to create a comfortable workspace
  • English learning courses
  • Relevant professional education
  • Gym or swimming pool
  • Co-working
  • Remote working
  • Stock options
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