Senior Fullstack Developer
New
F
Fundraise UpNonprofit Technology
Poland, CET hours preferredFull-TimeSenior
Salary5,000 - 6,400 EUR per month
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Job Details
- Languages
- Russian
- Experience
- 7+ years
- Required Skills
- Node.jsElasticSearchJavascriptMongoDBTypeScriptVue.JsNest.jsReact
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.
- Strong backend expertise with Node.js (experience with Koa or NestJS is highly preferred).
- Experience with Webpack configuration, performance optimization, and profiling.
- Experience with MongoDB, ClickHouse, or Elasticsearch.
- Familiarity with Docker, CI/CD pipelines, or cloud infrastructure.
- Proven ability to proactively identify and resolve performance bottlenecks.
- Strong sense of ownership and accountability.
- Experience with AI tools in daily development workflows.
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 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.
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