13 days ago
Kraków, PolandMid Level / Senior
H1B Sponsor
Responsibilities
- Design and develop backend services and APIs for SASE control plane and gateway orchestration.
- Build and maintain services using Go and PHP.
- Implement and enhance Linux networking features such as namespaces, routing, and VPN orchestration.
- Contribute to platform modernization including migration to lightweight Linux OS images.
- Improve performance, scalability, observability, and reliability of systems.
- Troubleshoot complex production issues related to networking and distributed systems.
- Collaborate with DevOps, Security, QA, and Product teams.
- Participate in architecture and design discussions.
- Maintain high engineering standards including code quality and documentation.
- Mentor junior engineers.
Requirements
- Strong professional experience with Go (Golang).
- Working knowledge of PHP or willingness to learn quickly.
- Experience building APIs, microservices, and platform services.
- Solid understanding of distributed systems and backend architecture.
- Experience with PostgreSQL or MySQL.
- Strong hands-on experience with Linux systems and internals.
- Advanced Linux networking expertise including TCP/IP and DNS.
- Ability to debug packet flow and system-level networking issues.
- Experience with Docker and Kubernetes.
- Familiarity with CI/CD pipelines and automation tools.