Senior Backend Engineer (Go/C++), Licensing Platform

541 Cisco Systems Poland sp. Z o.o.; Kraków; On-site; PLN 180,000 - 320,000; Full time

Job summary

Cisco Systems Poland sp. Z o.o. is seeking a backend engineer for the License Manager team.

You will build, test, and maintain core licensing and entitlement capabilities using Go and C++, delivering secure and scalable product functionality. Join a collaborative team working with product management, support, and engineering to improve system behavior, performance, and reliability, while growing ownership across services.

Qualifications

• Hands-on Go experience building scalable, high-throughput services.
• Hands-on C++ experience in production systems with performance considerations.
• Ability to work across Go services and existing C++ components.
• Experience leading design for distributed systems and APIs.
• Strong problem diagnosis for complex performance and reliability issues.
• Automated testing, observability, and production-support practices.

Responsibilities

• Build, test, and maintain core License Manager capabilities using Go and C++ to support secure and scalable product functionality.
• Deliver well-scoped features, fixes, and enhancements from design through implementation.
• Write clean, maintainable, and secure code with strong unit and integration test coverage.
• Investigate production issues to identify root causes and contribute durable fixes.

Skills

Go programming

C++ programming

Go and C++ integration

Distributed systems design

Performance and debugging

Automated testing and observability

Tools

Kubernetes

Cloud-native services

Python

Job description

Cisco Systems Poland sp. Z o.o. is seeking a backend engineer for the License Manager team.

You will build, test, and maintain core licensing and entitlement capabilities using Go and C++, delivering secure and scalable product functionality. Join a collaborative team working with product management, support, and engineering to improve system behavior, performance, and reliability, while growing ownership across services.