Engineering the Future of B2B: A conversation with Marwa
Meet Marwa, a Senior Software Engineer within our ZEOS team. Marwa is instrumental in architecting the ZEOS One Portal, the central gateway that enables our B2B partners to scale their operations through Zalando’s logistics and software services.

Architecting the ZEOS One portal
"I focus on delivering the core digital experience for Zalando's B2B partners. I play a key role in designing and maintaining the ZEOS One Portal, ensuring it functions as the secure, central access point for our Multi-Channel Fulfillment (MCF) partners.
I’m making it technically feasible and economically attractive for a growing number of merchants to utilise Zalando’s logistics and software services."
Scaling security
"I recently played a crucial role in the successful migration of our portal access controls to a centralised Authorization-as-a-Service (AaaS). This involved enforcing policies centrally using Skipper’s Open Policy Agent (OPA) filters to future-proof the platform.
The biggest lesson was the necessity of proactive collaboration. We successfully established policy-as-code management, ensuring the ZEOS Portal aligns with Zalando's corporate-wide IAM standard while maintaining a seamless experience for our partners."
"We are building the critical infrastructure layer that enables B2B success."
Cultivating connection
"Success in the ZEOS team requires a blend of technical depth and a holistic product mindset. We take responsibility for the health and stability of the entire stack, not just writing the code.
We encourage a culture of curiosity and collaboration. Even in a hybrid model, we ensure human connections remain strong - treating our in-office days as dedicated time for interaction and a team 'Fika' to keep our culture alive."

