Decima builds and evolves complex commerce systems that power integral brands.
We're looking for a Lead Backend Engineer who operates at an architect level but stays deeply hands‐on.
Most of our clients already have large, business‐critical Adobe Commerce (Magento 2) platforms in place. Your role is not to rebuild them from scratch — but to carefully evolve, extend, and improve them without breaking what already works.
This requires a different mindset: understanding existing systems deeply, making safe and well‐reasoned changes, and balancing long‐term architecture with real‐world constraints.
You'll be the person engineers rely on when changes are risky, and the one clients trust when stability matters as much as progress.
Role Overview
In this role, you will lead the evolution of existing enterprise Adobe Commerce Cloud platforms — introducing new features, integrations, and improvements while preserving system stability
You'll work within complex, already built ecosystems, making thoughtful architectural decisions that respect existing constraints and minimize risk




This is a hands‐on role — you'll actively contribute to implementation, review critical code, and ensure that every change is safe, scalable, and aligned with the overall system design
Responsibilities
Own architecture decisions within existing Magento 2 systems — balancing improvement with stability
Analyze and deeply understand legacy codebases and current system behavior before making changes
Design extensions and integrations that fit cleanly into existing architecture
Ensure backward compatibility and minimize regression risk in all changes
Lead complex integrations with ERP, PIM, OMS, CRM systems within existing environments
Review critical code changes with a focus on safety, performance, and maintainability
Identify architectural risks and propose safe, incremental improvements
Guide the team in making thoughtful, non‐breaking changes
Participate in discovery and pre‐sales — assessing existing s

📌 Lead Backend Engineer (Madrid)
🏢 Decima Digital
📍 Madrid