Core Engineer (Core Network Engineering Team)

Czym będziesz się zajmować?

Requirements

• Understanding of MNO/MVNO architecture and end-to-end GTP flow design
• Complete familiarity with 3GPP standards across 2G/3G/4G and 5G, including:
• GTP-C / GTP-U, CUPS - bearer lifecycle, session management, data plane flows
• Diameter & Radius - routing, realms, application IDs (Gx, Gy, S6a), AAA flows
• 5G-SA architecture - AMF, SMF, UPF, NRF, PCF - hands-on or advanced lab experience
• Understanding of GRX routing and IPX interconnect operations
• Understanding of roaming processes and procedures: IR.21,IPX, and GRX
• PGW - configuration, troubleshooting, session management
• PCRF- Gx interface, policy management
• GTP Proxy - GTP-C interception, roaming traffic steering
• Diameter - routing configuration, signaling troubleshooting, experience analyzing Diameter flows.
• Radius - AAA flows, authentication, and accounting troubleshooting, experience analyzing Radius.
• Understanding of roaming processes and procedures (IR.21, familiarity with IPX and GRX operations).
• Working with monitoring tools
• Ability to design, scale, and integrate a network element into a live network.
• Hands-on experience in integration between network elements.
• Comfortable working under pressure during live network incidents
• Familiar with APIs and basic scripting (Python or similar).
• 24x7 On-call duty.
• Team player

Kogo poszukujemy?

Responsibilities

• The role is technical and operational
• You will troubleshoot real network issues across 3G, 4G, and 5G Standalone, own tickets end-to-end, and lead integrations and projects on a live production network
• We are a focused team that moves fast and takes full ownership of activities end to end.
• You will grow quickly into independent contributors

We offer

• An exciting and challenging workplace with great skill and knowledge development opportunities.
• The opportunity to join a team of highly professional specialists in an international environment.
• The opportunity for professional development within a reputable international innovative and growing company.
• Salary level: 1400-1600 EUR gross per month
• Social benefits
• 200 EURO monthly Wolt food allowance
• Medical insurance
• Free mobile services with Tele2
• Car parking spot

Czego wymagamy?

3 lata doświadczenia na podobnym stanowisku

Znajomości

• 3GPP standards
• 5G-SA architecture
• MNO/MVNO architecture

Języki

• Polski
• Angielski

Jakie warunki i benefity otrzymasz?

• 13.2k-17.6k PLN brutto/m (Umowa o pracę)
• Umowa o pracę - Elastyczne godziny pracy (100%)
• Praca zdalna: Możliwa częściowo

Kim jesteśmy? Our client is an innovative technology company that has been revolutionizing the automotive industry since 2025 by providing advanced connectivity solutions. They specialize in creating a vehicle connectivity platform that enables data transmission from vehicles and their surroundings, supporting the monitoring of vehicle performance and driver behavior analysis. With a global reach, including locations in the USA, UK, Latvia, Portugal, Hong Kong, and Israel, the company offers an international work environment and the opportunity to work on globally significant projects. We are currently looking for talents for various positions who want to join our team and contribute to the further development of innovative technologies in the automotive industry. If you are ready for challenges in a dynamically developing company, check our current job offers.