Your future job:

Analysis of Current Network Architecture:

• Conduct in-depth technical audits of existing infrastructure.
• Identify weaknesses, inefficiencies, and technical debt.

Design of Target Architecture:

• Create designs for modern, scalable, and secure architecture for IP, UDN, Packet Core, and Voice (IMS).
• Collaborate with other architects (e.g., OSS/BSS, Cloud, Cybersecurity) to align overall strategies.

Implementation and Deployment Support:

• Develop implementation plans and technical specifications.
• Coordinate with engineering and operations teams during deployment.
• Ensure reliability of architecture and validate its performance.
• Participate in the testing, validation, and optimization of new architecture.

Standardization and Documentation:

• Create and update architectural documentation, designs, and models.
• Define network standards and best practices.

Required knowledge and skills:

Deep understanding in:

• IP Networking – Routing protocols (BGP, OSPF), MPLS, Segment Routing
• Mobile Packet Core – EPC, 5GC (AMF, SMF, UPF), GTP, Diameter, HTTP/2
• Voice over IP and IMS – CSCF, SBC, MGCF, MRFC/MRFP
• Subscriber Registries – UDR, UDM, HLR, HSS

Experience in designing and migrating complex network solutions in high-traffic environments (preferably in telco settings)
Knowledge of 3GPP, ETSI, IETF standards
Hands-on experience with virtualization/cloudification of network functions (NFV, CNF, Kubernetes is a plus)
Ability to prepare technical documentation, presentations, and defend architectural decisions
Knowledge of security aspects of network architecture (firewalls, segmentation, DDoS protection)

Required Qualifications:

• University degree in a technical field (IT / Telecommunications / Electrical Engineering)
• Minimum 15 years of experience in telco networks, with at least 10 years in an architectural or senior technical position
• Certifications (preferred): Cisco CCNP/CCIE, Nokia NRS II, Juniper JNCIP/JNCIE, 3GPP certifications, TOGAF
• Fluent English (technical and spoken) – necessary for international environment

Our offer:

• No more worryes about data and call expenses thanks to the employee plan
• Every 3 years, a contribution of up to CZK 18,000 towards a new phone
• 18,000 benefit points per year for relaxation, shopping, or holidays
• 5 weeks of vacation for rest + 3 sick days
• Recharge (extra month off) – after every 5 years of employment, you're entitled to 20 extra paid days off
• Meal allowance of CZK 115/day paid directly to your salary
• Points for the O2 Library worth CZK 2,400 per year for e-books or audiobooks
• Multisport card – a packed pass for wellness and fitness
• Shell discount card – fuel up at Shell for the best prices on the market
• Discounted O2 products for you and your loved ones
• Learning opportunities – workshops for both work and personal life, online courses (via the internal Virtual University), and special external training courses
• Team buildings, sports games, Christmas parties, and Family Days – because we pull together and have fun even outside of work
• Exclusive shopping deals with our partners (Makro, discounted cars, HP, ČEDOK, and more)

You can find all the benefits here: https://kariera.o2.cz/benefity