Full Stack Developer / Focus on Backend (Lead)

Location: Remote, aligned with CET business hours
Company Headquarters: Amsterdam, Netherlands
Employment Type: Full-time, Freelance

Are you a proactive Full Stack Developer ready to take ownership of exciting projects and help drive success across teams? We’re looking for someone with a minimum of 4 years experience who can bridge communication, (lead) development workflows, and build scalable, high-quality solutions!

What You’ll Do:
- Write clean, scalable, and maintainable code
- Build new integrations and system architectures
- Support and guide developers and QA specialists
- Tackle technical challenges and make quick decisions
- Analyze business needs and turn them into smart solutions
- Optimize and deploy websites and applications

Your SkillSet:
Backend (Node.js / Express):
Maintaining and improving an existing Express.js backend
 

• Fixing and improving payment integrations (PayPal, Klarna, Adyen)
• Ensuring correct request/response formats between backend and frontend
• Working with external APIs (CheckoutChamp / payment gateways)
• Debugging production issues related to backend logic
• Node.js (14–22), TypeScript
• Express.js
• GitHub Actions / CI pipelines
   

Operations:

• Docker, Docker Compose | Linux | Bash scripting
   

Frontend:

• JavaScript, TypeScript
• React (Redux, Hooks, Queries, Router) | Vite | MUI (Material-UI)
• HTML and CSS
   

Payments & Integrations:

• Understanding and maintaining payment flows
• Fixing inconsistencies between backend and payment provider SDKs
• Supporting multiple payment methods within a single checkout flow
• Working with third-party CRM / gateway systems

*Applications submitted through other channels will not be reviewed. In addition, we do not appreciate individual emails or messages sent to personal or alternative email addresses.