Full-Stack React/Node Developer

1 week ago

Belgrade, Central Serbia Butterfly Full time €18,000 - €24,000 per year

Butterfly (Belgrade, Serbia) specialists in marketplace development and modern web/app solutions. We ship in short iterations, keep the code clean, and focus on realworld impact.

We are hiring an experienced FullStack Engineer (React + ) on a B2B contract for remote, flexible work. You'll build scalable web apps and marketplace platforms with our core team.

Compensation: 1,500e - 2,000e per month (B2B invoice) + performance bonuses. Amount is variable by project scope and delivered outcomes.

Responsibilities:

  • Design, develop, and maintain scalable web applications (50/50 frontend/backend).
  • Backend: (Express), REST APIs, integrations, and performance optimization.
  • Frontend: React (hooks, modern state management), responsive UI development.
  • Cloud: Deploy and manage applications in cloud environments (e.g., Heroku).
  • Collaborate with Product, Design, and Engineering teams; contribute to code reviews and best practices.
  • Write clean, well-tested, and maintainable code.

Required Qualifications:

  • Experience: 3+ years building production web applications (fullstack);
  • Backend: (Express) in production;
  • Frontend: React with hooks; Redux experience preferred;
  • Databases: Relational or NoSQL (PostgreSQL, MySQL, MongoDB);
  • Architecture & DevOps: Solid understanding of REST, basic microservices concepts, Docker (local and production);
  • CI/CD & Testing: GitHub Actions or GitLab CI; unit and integration tests with Jest or Vitest;
  • Languages: Fluent English (written and spoken);
  • Work style: Remote discipline, fast problem-solving, ownership mindset;

Engagement & Logistics:

  • Type: B2B contract (freelance/contract). This is not a permanent employment role.
  • Location/Time: 100% remote, flexible hours; preferred overlap with CET (±2h).
  • Start: ASAP.
  • Compensation: 1,500e - 2,000e/month (B2B) + performance bonuses; range is nonfixed and scales with scope and delivery.

How to Apply:

  • Submit via LinkedIn or email ;
  • CV or LinkedIn + GitHub/Portfolio links;
  • 23 sentences on relevant React/Node work and (if any) marketplace experience;
  • Availability (earliest start, weekly capacity);
  • Location / time zone;

We welcome applications regardless of gender, age, origin, religion, sexual orientation, or disability. Personal data is processed solely for recruitment in line with GDPR.

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