Backend lead/ Senior / Middle+ (Node / Node+Go)

👌 Vacancy: Backend lead / Senior / Middle+ (Node / Node+Go) 
🏡 Company: Native Commerce 
📍 Location: Barcelona (hybrid: 3 days coworking) 
💻 Work format: Hybrid / Full-time / Contractor 
📝 Contract type: contractor agreement

💷 Salary: €3000-6500 (open to discussion, paid in GBP via Deel)
Native Commerce delivers mission-critical software for modern e-commerce brands-spanning website/web app frontends, warehouse management (WMS), order management (OMS), logistics, and real-time BI-all unified in a modular, composable platform. Our goal: help e-commerce businesses run smoother, reduce costs, and boost revenue.

1️⃣  Backend Engineer (Node.js) Direction: working with Saas e-commerce platform

Responsibilities:

• building backend solutions for major e-commerce player
• contributing to platform development and integrations
• Go as a plus (broader engineering perspective)
   

2️⃣ Node.js + Go Backend Engineer (Senior / Tech Lead) Direction: PIM strategy + implementation

Key responsibility: Improving the overall SaaS platform by structuring complex processes

• OMS
• WMS
• operational tools
• independently define and build the PIM strategy
• implement it with clients
• this is not just development
• this is ownership + product thinking + implementation

💡 Across all roles, we value:

• independence
• ownership
• ability to work without detailed specifications
• системное (system-level) thinking

✅ Our ideal candidate:

We are not looking for just a strong coder.

We are looking for an engineer who solves problems.

• A developer with a broad technical background and versatile experience.
• A lead/ Senior / Middle+ level engineer: strong in architecture, ownership, independence, initiative, maturity, and engineering discipline, with a focus on quality.
• Someone who sees the system end-to-end, not just their own isolated component.
• Experience in e-commerce, high-load systems, marketplaces, or transactional platforms - a major advantage.
• Confident using AI-assisted tools such as Copilot, Claude-Code, Cursor, automated tests, and LLM-based workflows.

If you’re a hands-on engineer who builds complex systems, understands how modern e-commerce works, and wants to join a team where AI is a core part of the engineering process - we’d love to talk.

🔑 Key requirements

1. Strong independence (core)

• Makes decisions independently
• Does not wait for detailed specs
• Comfortable working in ambiguity

2. Troubleshooting mindset

• Able to debug complex systems
• Fixes issues end-to-end
• Thinks systemically

3. Broad engineering mindset

• Product thinking OR
• Testing mindset OR
• DevOps understanding

4. AI-first approach (must-have)

• Uses AI tools daily (not occasionally)
• Copilot, Claude-Code, Cursor, LLM workflows
• Integrates AI into real development process

5. Senior level

• Strong in architecture, ownership, responsibility
• Potential to act as a Tech/Team Lead

➕ Nice to have

• Experience with e-commerce, marketplaces, high-load systems
• Understanding of carts, checkout, OMS/WMS, delivery flows

🧭 What you’ll do

• Build and maintain