Backend Engineer (Node.js)

Location: Remote in Spain; CET hours preferred

Salary: €5,600–€6,500 gross per month

Company

Fundraise Up is a global fundraising platform that provides donation technology for nonprofit organizations, including checkout experiences, customizable widgets, portals, administrative tools, and analytics applications.

What you will do

• Design, build, and maintain scalable backend services with Node.js and TypeScript.
• Develop product features from concept through deployment in collaboration with product managers and frontend engineers.
• Own backend architecture decisions related to performance, reliability, security, and scalability.
• Work on distributed systems, event streaming, background processing, analytics pipelines, and search.
• Write unit tests, conduct code reviews, refactor legacy code, and implement system improvements.
• Mentor engineers and contribute to engineering practices and knowledge sharing.

Requirements

• 7+ years of backend development experience, preferably in a product-driven environment.
• Strong hands-on experience with Node.js, Koa or NestJS, and advanced TypeScript.
• Experience with MongoDB or other NoSQL databases.
• Knowledge of event-driven and distributed architectures using Kafka, RabbitMQ, or Bull/Redis.
• Experience with ClickHouse or similar analytics databases and Elasticsearch.
• Comfort working within a Russian-speaking team.

Nice to have

• Experience working in a remote-first, globally distributed team.
• Experience with Prometheus, Grafana, Datadog, or similar observability tools.
• Interest in nonprofit technology.
• Hypothesis-driven approach and ability to explain complex technical concepts to non-technical stakeholders.

Culture & Benefits

• Collaborative product team with ownership of the product it builds.
• Flat and transparent company culture with direct customer feedback.
• Equity options and a long-term focus on meaningful contribution.
• Private medical insurance for the employee and family.
• 23 paid vacation days, 11 paid public holidays, and 5 company-paid sick days.
• English courses, professional education, gym or swimming pool, coworking, and home office setup assistance.