Backend Developer (Node.js) Porto

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Highlights

Location: Remote (CET hours preferred)

Compensation: €4, 450 - €5, 800 + stock options

Language: Russian-speaking team

About Fundraise Up

We’re Fundraise Up – a global fundraising platform built to make donating to nonprofits fast, seamless, and accessible to all. Every month, our technology powers tens of millions of dollars in donations across the globe. We focus on innovation that directly impacts results: faster load times, higher conversion rates, global payment support, and accessibility‑first design.

Our platform is trusted by many of the world’s leading nonprofits, including UNICEF, the Alzheimer’s Association, and a wide range of global NGOs. With a 4. 9/5 rating across top software review platforms, we’re recognized not just for our impact – but for the quality of the product we deliver.

We operate in the enterprise segment, serving nonprofit organizations across North America, the United Kingdom, Australia, and Europe. We’re building a large and complex product ecosystem that serves nonprofits, donors, and partners around the world. The platform includes a modern checkout experience and customizable widgets (each a standalone SPA), donor, organization, and partner portals, admin tools, and several internal apps.

Our backend is powered by Node. js (Koa, Nest
JS) and Mongo
DB. The frontend stack includes Webpack, Vue. js, and React, with nearly all code written in Type
Script. For high‑throughput messaging and background processing, we use Kafka (for millions of events) and Bull (Redis). Analytics data is stored in Click
House, and we use Elasticsearch for search.

The Team: We are a distributed team of 160+ product professionals, including 80+ engineers. Our team members are mainly based across Spain, Poland, Portugal, Georgia, Armenia, Serbia, Turkey, and Cyprus. Many of our developers bring 5‑10+ years of experience, and we foster a culture of deep technical curiosity and knowledge sharing.

Despite our scale, we operate like a focused team – where every task matters and every voice is heard. We value thoughtful collaboration, strong engineering practices, and a product mindset. Biweekly engineering forums give space to share learnings and celebrate technical achievements. You’ll be joining a team where quality, mentorship, and mutual respect come first.

About The Role

As a Backend Developer, you will be a key architect of the engine that powers our global platform. You'll resolve complex challenges in a high‑load, distributed system, building and scaling the infrastructure that processes millions in donations. This is not a maintenance role; it's a high‑impact, product‑focused engineering position where clean architecture, performance, and reliability are paramount.

Technical Stack

• Backend: Node. js (Koa, Nest
  JS), Type
  Script
• Database: Mongo
  DB
• Infrastructure: Kafka for event streaming, Bull (Redis) for background jobs, Click
  House for analytics, and Elasticsearch for search.

What You’ll Do

• Design, build, and maintain clean, efficient, and scalable backend services in Node. js and Type
  Script.
• Develop new product features from concept to deployment, collaborating closely with product managers and frontend engineers.
• Own key parts of our backend architecture, making critical decisions that enhance performance, reliability, and security.
• Write comprehensive unit tests and conduct thorough code reviews to maintain code quality.
• Proactively identify and implement system improvements, refactoring legacy code where necessary.
• Contribute to a culture of engineering excellence by mentoring others and sharing your expertise.

Requirements

• Experience: 5+ years of backend development experience, preferably in a product‑driven environment.
• Node. js expertise: Strong, hands‑on experience with Node. js and modern frameworks like Koa or Nest
  JS.
• Type
  Script proficiency: Deep expertise in Type
  Script, including advanced typing and module systems.
• Database skills: Solid experience with Mongo
  DB or other No
  SQL databases.
• Distributed systems: Familiarity with event‑driven architecture using tools like Kafka, Rabbit
  MQ, or Bull/Redis.
• Data & search: Hands‑on experience with Click
  House (or similar analytics DBs) and Elasticsearch.
• Architectural mindset: A strong understanding of system design, clean architecture principles, and performance optimization.
• Ownership: The ability to work independently, take ownership of your work, and see projects through to completion.
• Communication: Comfortable working within a Russian‑speaking team.

Nice to Have

• Prior experience working in a remote‑first, globally distributed team.
• Experience with performance monitoring and observability tools (e. g. , Prometheus, Grafana, Datadog).
• A genuine interest in the non‑profit technology sector.
• A hypothesis‑driven mindset and the ability to communicate complex technical concepts to non‑technical stakeholders.

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 builds.
• Clear product vision and access to real customer feedback from global nonprofit leaders.
• Flat structure: no politics, just great work with great people.
• Transparent company culture – we share how we’re growing, where revenue comes from, and what’s next.
• Long‑term focus: we offer equity options and value sustained, meaningful contribution.

Benefits

• 31 days off.
• 100% paid telemedicine plan.
• Home office setup assistance.
• English learning courses.
• Relevant professional education.
• Gym or swimming pool.
• Co‑working.
• Remote working.
• Official correspondence from Fundraise Up originates from the @fundraiseup.com domain.

Seniority level

Mid‑Senior level

Employment type

Full‑time

Job function

Engineering and Information Technology

Industries

Software Development