{"id":2410775,"url":"https://alion.io/job/moldcell-core-ps-ip-engineer","title":"Core PS / IP Engineer","company":{"id":57182,"name":"Moldcell","domain":"moldcell.md","url":"https://alion.io/company/moldcell","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"JazzHR","truth_index":null},"role":"Industrial Engineering","role_family":"Industrial Engineering","seniority":null,"employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Chișinău, Moldova"],"countries":["MD"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":15500,"max_usd":45000,"period":"year","method":null,"sample_n":16960},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Bash","optional":false},{"name":"BGP","optional":false},{"name":"DNS","optional":false},{"name":"Kubernetes","optional":false},{"name":"Linux","optional":false},{"name":"OpenStack","optional":false},{"name":"Python","optional":false},{"name":"TCP/IP","optional":false},{"name":"Unix","optional":false},{"name":"VLAN","optional":false},{"name":"Wireshark","optional":false}],"status":"live","first_seen_at":"2026-10-02T09:00:00Z","employer_posted_date":null,"last_verified_at":"2026-10-02T09:00:00Z","board_verified":false,"closed_at":null,"days_open":11,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":11},"description":"Responsible for the operation, maintenance, troubleshooting and optimization of Mobile Core PS and IP infrastructure, including legacy EPC and next-generation virtualized and cloud-based Core platforms.\nThe role contributes to the introduction, integration and evolution of NFVI, 5G NSA/SA and 5G Core technologies, as well as to the interworking of PS, CS and IMS domains, ensuring the reliable operation of end-to-end mobile services.\n\nKey Responsibilities:\n1. Core PS & IP Network Operations\n\nOperate, monitor and maintain Core PS network elements and related IP infrastructure, including virtualized/NFVI platforms.\n\nMonitor network availability, performance, capacity and key operational KPIs.\n\nIdentify potential performance and capacity issues and contribute to network optimization.\n\n2. Troubleshooting & Network Analysis\n\nTroubleshoot issues related to mobile data, APN, session establishment, mobility, authentication, DNS and IP connectivity.\n\nAnalyze GTP, Diameter and IP traffic using packet captures, logs and network monitoring tools.\n\nInvestigate and resolve IP connectivity and routing issues, including BGP, VLAN, VRF, NAT and ACL related problems.\n\nPerform root-cause analysis and provide effective solutions for service-impacting incidents.\n\n3. 5G, NFVI & Network Transformation\n\nSupport the introduction, integration and stabilization of 5G NSA/SA and next-generation Core technologies.\n\nParticipate in NFVI deployments, migrations, software upgrades and network modernization projects.\n\nSupport the evolution towards virtualized and cloud-native Core environments.\n\nContribute to testing, integration and troubleshooting during network transformation projects.\n\n4. Roaming & Interworking\n\nSupport roaming services and troubleshoot issues in cooperation with internal teams and roaming partners.\n\nSupport troubleshooting of PS/CS/IMS interworking issues related to VoLTE, voice, SMS and other IMS-based services.\n\n5. Technical Collaboration\n\nWork closely with internal technical teams, vendors and technology partners to investigate and resolve complex network issues.\n\nParticipate in incident resolution, technical investigations and network improvement initiatives.\n\nContribute to technical documentation and knowledge sharing within the team.\n\nRequired Knowledge & Experience:\n\nBachelor's degree in Telecommunications, IT, Computer Science or a related field.\n\n3–5 years of relevant experience in Mobile Core, Packet Core and/or IP networks.\n\nSolid understanding of LTE/EPC architecture and good knowledge of 5G NSA/SA concepts.\n\nGood knowledge of GTP-C/GTP-U, Diameter, TCP/IP and DNS.\n\nGood understanding of IPv4/IPv6, routing, BGP, VLAN, VRF, NAT and ACL.\n\nPractical experience with Wireshark/Tshark, packet capture analysis, network monitoring and log analysis.\n\nGood knowledge of Linux/Unix CLI.\n\nUnderstanding of NFVI, virtualization and cloud-based/cloud-native Core environments.\n\nBasic understanding of CS Core and IMS/VoLTE service flows, including voice and SMS interworking.\n\nGood technical English and the ability to communicate effectively with vendors and internal technical teams.\n\nWill Be an Advantage:\n\nExperience with Ericsson, Huawei or other Mobile Core solutions.\n\nPractical experience with NFVI, 5G Core, virtualized network functions and/or cloud-native platforms.\n\nKnowledge of CS Core, VAS and IMS/VoLTE, including voice, SMS, USSD and signaling flows.\n\nExperience with Diameter-based services related to IMS/VoLTE.\n\nKnowledge of Kubernetes and/or OpenStack.\n\nBasic Python and/or Bash scripting skills.\n\nExperience with network migrations, upgrades and technology transformation projects.\n\nKey Competencies:\n\nStrong analytical and troubleshooting skills.\n\nSystematic and structured approach to problem solving.\n\nStrong sense of ownership and accountability.\n\nAbility to work effectively under pressure, especially during service-impacting incidents.\n\nTeamwork and cross-functional collaboration.\n\nClear and effective technical communication.\n\nAbility to learn and adapt to new technologies.\n\nProactive approach to network optimization and continuous improvement.\n\n Trimite CV","description_format":"text","description_chars":4125,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Telecommunications"],"lifecycle":[{"event":"open","at":"2026-10-13T01:57:32Z"}],"visa":[],"liveness":{"score":76,"band":"hot","label":"Hiring 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