/ TEAMS · Specialist engineering · 5G Core
Source engineers experienced in Cloud-native telecom core systems and network functions. for business-critical production systems, safe integrations and measurable technical ownership.
2,000+ engineers in our active talent network · Regional recruiters
/ SYSTEM STACK
3GPP 5GC architecture
AMF SMF UPF functions
PFCP signaling
SBA HTTP2 APIs
subscriber authentication
/ AVAILABLE TO HIRE
Profiles show the experience we can source. Individual candidate availability is confirmed after enquiry.
Mid-level 5G Core Engineer
Inquire availability3+ years of experience · Poland
5G Core Engineer with 3 years in production systems, focused on 3GPP 5GC architecture and AMF SMF UPF functions.
Languages: Polish, English C1
Mid+ 5G Core Engineer
Available6+ years of experience · Bulgaria
5G Core Engineer with 6 years in production systems, focused on AMF SMF UPF functions and PFCP signaling.
Languages: Bulgarian, English B2+
Senior 5G Core Engineer
Available13+ years of experience · Bulgaria
5G Core Engineer with 13 years in production systems, focused on PFCP signaling and SBA HTTP2 APIs.
Languages: Bulgarian, English B2+
Senior 5G Core Engineer
Inquire availability8+ years of experience · Serbia
5G Core Engineer with 8 years in production systems, focused on SBA HTTP2 APIs and subscriber authentication.
Languages: Serbian, English B2+
/ Engineering teams
Onectus uses its active engineering network and regional recruiting partners to search against concrete systems, environments and responsibilities. We evaluate practical experience rather than treating a framework mention or certification as proof of delivery. Particular availability and engagement terms are confirmed after an enquiry. For this role, practical knowledge of 3GPP 5GC architecture, AMF SMF UPF functions, PFCP signaling helps define the engineering search.
/ Technical specializations
The right profile depends on your actual architecture, performance constraints, integration boundaries and operational responsibilities.
5G Core responsibilities include 3gpp 5gc architecture, related amf smf upf functions, clear test coverage and a reliable production handover. Examine the actual tooling and deployment environment.
5G Core responsibilities include amf smf upf functions, related pfcp signaling, clear test coverage and a reliable production handover. Examine the actual tooling and deployment environment.
5G Core responsibilities include pfcp signaling, related sba http2 apis, clear test coverage and a reliable production handover. Examine the actual tooling and deployment environment.
5G Core responsibilities include sba http2 apis, related subscriber authentication, clear test coverage and a reliable production handover. Examine the actual tooling and deployment environment.
5G Core responsibilities include subscriber authentication, related kubernetes network functions, clear test coverage and a reliable production handover. Examine the actual tooling and deployment environment.
5G Core responsibilities include kubernetes network functions, related 3gpp 5gc architecture, clear test coverage and a reliable production handover. Examine the actual tooling and deployment environment.
/ Project scenarios
Debug UPF session establishment. Define constraints around 3gpp 5gc architecture, map dependencies and test how the proposed implementation behaves under real operating conditions.
Scale control-plane services. Define constraints around amf smf upf functions, map dependencies and test how the proposed implementation behaves under real operating conditions.
Integrate charging and subscriber flows. Define constraints around pfcp signaling, map dependencies and test how the proposed implementation behaves under real operating conditions.
Harden 5G-core observability. Define constraints around sba http2 apis, map dependencies and test how the proposed implementation behaves under real operating conditions.
/ Practical evaluation
A senior engineering interview should surface directly relevant implementation details, debugging history and operational judgment.
Describe a production issue involving 3GPP 5GC architecture and what evidence led to a fix.
Which decisions around AMF SMF UPF functions and PFCP signaling were you personally accountable for?
Describe a production issue involving PFCP signaling and what evidence led to a fix.
Which decisions around SBA HTTP2 APIs and subscriber authentication were you personally accountable for?
/ Sourcing process
Define platform versions, deployment constraints, traffic patterns, required integrations and ownership.
Search the active network and partner channels for platform-specific engineering experience.
Discuss real systems, code or configuration decisions, troubleshooting and change control.
Confirm role boundaries, location or remote access, availability, security and interviews.
Profiles, availability and engagement terms are confirmed for each request.
/ Questions
Yes. Tell us the relevant versions, operational environment and the responsibilities connected to 3GPP 5GC architecture. We qualify hands-on experience during each search.
These can be included when central to the project. We distinguish practical implementation work from general familiarity and ask about failure scenarios and testing.
We look at production decisions, trade-offs, incident diagnosis, code or infrastructure ownership and the ability to explain decisions without relying on a technology checklist.
Share your architecture, technical constraints, collaboration model and priorities. We can then discuss relevant sourcing channels, evaluation criteria and next steps.
/ Onectus · TEAMS
Tell us the technology, production responsibilities, experience level and working model. We'll activate the appropriate engineering sourcing channels.
