Packet Core Design Engineer Job at Randstad (London)

Packet Forwarding Engineer

This role involves designing, developing, troubleshooting, and debugging softwar...

Location

India , Bangalore

Salary:

Not provided

Hewlett Packard Enterprise

Expiration Date

Until further notice

Requirements

A minimum of B.E or BTech from a reputed institution in CS/EE with 6+ years of experience is required
Excellent C/C++/Python programming, design, problem solving and debugging skills
Must have strong Networking background
Prior experience with Software development on routers, switches is desirable
Prior experience with datapath ASICs like Broadcom, Mellanox, Innovium, Barefoot or any other NPU is highly desirable
Must be playing a strong technical role in the current position
Exposure to multi-core Software architectures
A clear understanding of the product development cycle, technical requirements with a strong understanding of concepts related to computer architecture, data structures and programming practices
Candidate must have a strong record delivering software projects on-time and with high quality
Candidate must possess good oral and written communication skills, be highly self-motivated, and have the ability to work in a team environment

Job Responsibility

Design, develop and maintain high performance forwarding/networking software for the next generation of Switches
Work with customer facing teams to understand requirements and translate the requirements into software design
Develop complex packet forward features in IPv4/IPv6/MPLS, EVPN-VxLAN, Multicast, Firewall/Filter, Cos, DHCP, Services areas etc.
Analyze, debug and fix complex microkernel/Linux issues
Continuously drive innovations by working with cross functional teams to address complex problems
Assist in solving complex customer issues and queries reported from the field and drive customer satisfaction
Work on sustaining existing features

What we offer

Health & Wellbeing
Personal & Professional Development
Unconditional Inclusion

Fulltime

Senior Core Network Engineer

Location

Spain; United Kingdom

Salary:

Not provided

Airalo

Expiration Date

Until further notice

Requirements

At least 3 years in a hands-on engineering or architectural capacity in one of the following environments: Tier 1 Carrier / Mobile Network Operator (MNO)
Major Network Equipment Provider (NEP)
MVNO / MVNE
Primary responsibility for High-Level Design (HLD) or Low-Level Design (LLD) in one or more of: DNS Hierarchy: Designing S-NAPTR records for MME/SGSN node discovery (PGW/SGW/UPF)
IP Strategy: Managing ASN (Autonomous System Numbers) and BGP peering for internet/roaming connectivity
Subscriber Mapping: Defining HSS/UDM profiles, including QoS, AMBR, and APN subscriptions
Capacity Planning: Dimensioning EPC/5GC nodes to handle specific data growth projections
Roaming Architecture: Designing IPX/GRX connectivity and bi-lateral roaming agreements
Comfortable working in a remote environment
Based in Spain or UK

Job Responsibility

Leading the design and expansion of our Packet Core

Fulltime

IoT Onboarding Engineer

We are seeking an experienced IoT Onboarding Engineer to deliver high‑quality te...

Location

Romania , Iasi

Salary:

Not provided

Vodafone

Expiration Date

Until further notice

Requirements

A graduate with a university degree, preferably in engineering, telecommunications, computer science, or a related technical field
Experienced in roles such as network engineer, technical designer, support engineer, or network architect
Knowledgeable in Telecom Core Packet Switching components including GGSN, PGW, SGSN, MME, DNS and BIG‑IP
Skilled in working with Cisco and Juniper technologies
Familiar with Packet‑Switched and Circuit‑Switched telecom networks such as GSM, UMTS, LTE and NB‑IoT
Proficient in protocols including GTP, RADIUS, Diameter, IP, BGP, MP‑BGP, MPLS, L3‑VPN and IPSEC
Experienced using Linux/UNIX or other open‑source operating systems
Capable of performing detailed analysis and implementation of IT and telecom hardware and software solutions

Job Responsibility

Analyse and validate IoT customer solution design documentation and determine required technical configurations
Lead and take ownership of solution implementations during the delivery phase
Develop operational technical procedures to enhance build efficiency and simplify solution delivery
Play an essential role in the end‑to‑end IoT technical onboarding journey
Serve as the single point of contact for first‑line technical troubleshooting with IoT customers until solutions go live
Conduct assessments and validations of detailed IoT solution design documentation

Senior Core Network Engineer

We are looking for an expert engineer to lead the design, deployment, and expans...

Location

Salary:

Not provided

Airalo

Expiration Date

Until further notice

Requirements

Experience with a Tier 1 Carrier, Mobile-Operator, or Major Network Equipment Provider (NEP) background
Deep understanding of SGSN, GGSN, and HLR architecture
Extensive experience with PGW, HSS, SGW, and MME
Proficiency in 5G Non-Standalone (NSA), 5G Standalone (SA), and PCC
Hands-on experience with Diameter S6a (HSS-MME), Gx (PCRF-PGW), and Gy (OCS-PGW)
Strong knowledge of IP addressing, subnetting, OSPF/BGP routing, VRFs, and ASN management
Expert-level DNS resolution (A, AAAA, SRV, NAPTR), DHCP, and IPX/GRX management

Job Responsibility

Design and dimension the Packet Core (EPC/5GC) to ensure scalability for data growth
Manage roaming coverage with IPX/GRX providers, roaming sponsors, and direct bi-lateral agreements
Define specific network profiles and configurations for HSS/UDM subscribers, including QoS, AMBR, and APN subscriptions
Architect the DNS hierarchy for the mobile core, focusing on S-NAPTR records for MME/SGSN to discover PGW/SGW/UPF nodes
Plan and implement IP routing strategies, including ASN (Autonomous System Number) management and BGP peering for internet and roaming connectivity
Manage Access Point Name configurations for various service types, including IMS, Internet, and IoT
Perform deep-dive troubleshooting of signaling procedures across 3G (Iu-PS), 4G (S1-MME, S11, S5/S8), and 5G NSA (EN-DC)
Apply in-depth understanding of 3GPP standards for 3G, 4G EPC, and 5G NSA mobile data call-flows
Analyze and optimize critical flows, specifically Attach/Registration (Authentication vectors, ULR/ULA, Create Session) and Bearer Management (Dedicated bearer creation for VoLTE/QCI 1 and default bearers)
Utilize protocol analyzers such as Wireshark or Tektronix to decode ASN.1 based messages and Diameter signaling (Gx, Gy, S6a, S5, S8, GTP-C, GTP-U)

What we offer

Health Insurance
work-from-anywhere stipend
annual wellness & learning credits
annual all-expenses-paid company retreat in a gorgeous destination & other benefits

Fulltime

Senior Network Systems Software Engineer

Senior Network Systems Software Engineer. Aruba is an HPE Company, and a leading...

Location

India , Bangalore

Salary:

Not provided

Hewlett Packard Enterprise

Expiration Date

Until further notice

Requirements

Bachelor’s or Master’s degree in Computer Science or Electronics and Communication Engineering
4 to 10 years of hands-on experience in networking or systems product development
Strong C programming expertise (mandatory) with deep hands-on experience in writing optimized, production-quality C code, memory management, pointers, and performance tuning, debugging complex system-level issues
Strong foundation in Data Structures and Algorithms, with practical experience designing and using lists, trees, hash tables, graphs, queues, and stacks, scalable data models for networking and systems software
Working knowledge of C++ is a plus
Good understanding of networking concepts and protocols, including Routing & Switching: OSPF, BGP, ISIS, VPN & Overlay: MPLS, VPLS, Layer-2 and Layer-3 VPNs, EVPN, VXLAN, Traffic & Services: Multicast, QoS, Firewall
Solid understanding of the OSI Model and the TCP/IP protocol suite, including ARP, IP, ICMP, IGMP, TCP, UDP, SNMP, and FTP
Experience working on routers, switches, or network operating system platforms is highly preferred
Strong problem-solving and analytical thinking abilities
Self-motivated with the ability to work independently and collaboratively

Job Responsibility

Design, develop, and enhance common networking infrastructure used by multiple Layer-2 and Layer-3 protocols, as part of a product engineering team (not network operations or IT support)
Build and maintain shared framework components that support routing, switching, VPN, and overlay protocols rather than implementing individual protocol stacks
Develop high-performance, low-latency system software primarily in C, focusing on efficient data structures, memory management, and scalability
Design and optimize core data structures and frameworks used for: Packet processing pipelines, Routing and forwarding databases, Protocol state machines and control-plane infrastructure
Work closely with protocol teams (OSPF, BGP, ISIS, EVPN, VXLAN, etc.) to provide robust and reusable infrastructure components
Participate across the full product development lifecycle, including design, implementation, debugging, testing, and optimization
Analyze and troubleshoot complex system-level, performance, memory, and concurrency issues
Collaborate with system test, QA, and cross-functional engineering teams to deliver scalable and reliable networking solutions
Learn and adapt quickly to new networking technologies, standards, and product requirements

What we offer

Health & Wellbeing: comprehensive suite of benefits that supports physical, financial and emotional wellbeing
Personal & Professional Development: specific programs catered to helping you reach any career goals
Unconditional Inclusion: unconditionally inclusive in the way we work and celebrate individual uniqueness

Vice President of Product and Engineering

Our client is building the next generation network security platform and is look...

Location

United States

Salary:

Not provided

80Twenty

Expiration Date

Until further notice

Requirements

Proven Leadership: 10+ years in product and/or engineering leadership roles, with experience guiding both disciplines in high-growth environments
Product Expertise: Deep understanding of customer discovery, product-market fit, and translating vision into detailed product requirements
Technical Depth: Strong background in cybersecurity, networking, distributed systems, cryptography, high-speed packet processing, or protocol design
Startup DNA: Comfortable working in an early-stage environment—rolling up your sleeves, making fast decisions, and scaling teams from zero to hundreds
Builder’s Mindset: Passion for elegant design, user experience, and code quality
Communicator & Partner: Ability to convey complex concepts to customers, investors, and cross-functional stakeholders

Job Responsibility

Strategic Technical Leadership: Define and own the product operations strategy and execution across all components
Participate in product discovery, market research, and customer engagement to ensure the roadmap aligns with market needs and company objectives
Translate customer and market insights into clear product requirements, technical specifications, and user stories
Balance near-term deliverables with long-term strategic investments
Execution & Delivery: Oversee architecture and technical design to ensure secure, scalable, and simple solutions
Drive the full engineering lifecycle from prototype to GA release, ensuring world-class quality and performance
Establish DevSecOps practices and continuous delivery pipelines
Ensure all core technology meets regulatory, security, and performance requirements
Team Building & Culture: Recruit, mentor, and inspire exceptional product managers and engineers
Build a culture of collaboration between product and engineering teams that reflects their DNA of simplicity, security, and speed

What we offer

Equity & Ownership: Early equity stake and a leadership seat shaping both product and engineering strategy for a company built for rapid scale and long-term impact
Ground Floor Opportunity: Shape a platform aiming to redefine Internet trust and disrupt a $60B+ network security market
Cutting-Edge Technology: Work on cryptographic identity, trust-based routing, and AI-powered security at Internet scale

Fulltime

Reliability Engineering Specialist, Policy

Our mobile network has been number one for a decade. Mobile technologies and cap...

Location

United Kingdom , Bristol; Borehamwood

Salary:

Not provided

Plusnet

Expiration Date

Until further notice

Requirements

Expert knowledge of Cloud Native Core
Strong understanding of 5G/LTE architecture, Policy Control Function (PCF) call flows, and protocols (BGP, PFCP, GTPv2, Diameter, SIP)
Linux administration (OEL/RedHat), networking design/operations, MySQL DB, and Kubernetes administration/troubleshooting
Proficiency in Ansible, Terraform, Git, Jenkins, Python, and Unix Shell scripting
Familiarity with OSS tools and tracing systems (CNOM, Wireshark, Prometheus, Netscout)
Knowledge of network security, firewall implementations, and vulnerability management
Experience implementing reliability engineering and automation for patching, deployment, and maintenance
Line management experience in an operational context, with strong vendor/stakeholder management and clear communication skills
Proven experience in a technical role within a telecom organization, managing support and maintenance of cloud core platforms
Hands-on experience with Linux administration and automation tools such as Terraform and Ansible

Job Responsibility

Own and be accountable for the build, operation & maintenance of packet core platforms in our innovation labs including inputting to delivery plans, integration of platforms
Collaborate with cross functional teams within Mobile including Design, Operations, Development, Quality Assurance & Leading technical discussions and investigations across mobile core networks
Support incident, change, problem, risk, and vulnerability management. Tracing network issues and investigating dataflows using network tools available (CNOM/Wireshark/NetScout)
Drive and maintain alignment of the Test Environments with reference to the live EE network
Champion and drive continuous improvement for the service that we offer to our key stakeholders – Test, Design and Operations. Promoting and encouraging effective automation solutions for our mobile core
Work co-operatively with other business communities and third parties, to improve service performance, quality, and customer experience
Lead the config changes with CICD pipeline and drive the successful implementation within all of the Labs environments
Line manage a small squad (typically 2–6 engineers) comprising L2/L3 engineers and specialists

What we offer

On target 10% on target bonus
BT Pension scheme, minimum 5% Employee contribution, BT contribution 10%
From January 2025, equal family leave: receive 18 weeks at full pay, 8 weeks at half pay and 26 weeks at the statutory rate. It’s for all parents, no matter how your family is made up
Enhanced women’s health support: including help with menopause symptoms, cancer screenings, period care and more
25 days annual leave (not including bank holidays), increasing with service
24/7 private virtual GP appointments for UK colleagues
2 weeks carer’s leave
World-class training and development opportunities
Option to join BT Shares Saving schemes

Fulltime

Senior L4 Network Engineer/Architect – MPLS Network Engineering

We are seeking a Senior L4 Network Engineer/Architect to lead the design and del...

Location

United States of America , Los Angeles

Salary:

160000.00 - 190000.00 USD / Year

NTT DATA

Expiration Date

Until further notice

Requirements

Active CCIE (Enterprise Infrastructure or Service Provider track strongly preferred)
10+ years in carrier-grade WAN engineering, including 5+ years MPLS architecture and deployment experience
Proven expertise in MPLS L2/L3 VPN, traffic engineering, and QoS strategies
Strong knowledge of optical transport technologies (DWDM, dark fiber design, OTDR testing)
Hands-on experience with Cisco Catalyst 8500/ASR platforms, IOS-XE, and network automation tools
Familiarity with BGP, OSPF, IS-IS, and advanced routing policy design for large-scale networks
Bachelor's degree in Computer Science or Information Technology
Must reside in the Los Angeles metro area
Applicants must be legally authorized to work in the United States at the time of application and must not require sponsorship for employment visa status now or in the future

Job Responsibility

Architect MPLS Core and Edge Solutions: Design MPLS-based WAN services supporting IP-VPN, L2VPN, and multicast over fiber and DWDM rings
ensure compliance with SLA-driven latency, jitter, and packet loss requirements
Plan Optical Transport Integration: Engineer DWDM ring topologies for high-capacity backbone connectivity
define optical budgets, protection schemes, and diverse path strategies for dark fiber deployments
Implement High Availability & Diversity: Design redundant ingress/egress paths, dual-homed PoPs, and geographically diverse fiber routes to meet 99.995% uptime targets
Traffic Engineering & QoS: Apply MPLS TE, RSVP-TE, and hierarchical QoS to optimize bandwidth allocation across multiple venues and critical applications
Security & Segmentation: Integrate MPLS VPN segmentation with Zero Trust principles
enforce encryption (MACsec/IPsec) and compliance with FCC and cybersecurity standards
Performance Testing & SLA Assurance: Develop KPIs, conduct end-to-end load testing, and validate optical and MPLS performance using OTDR, iPerf, and ThousandEyes
Automation & Orchestration: Utilize Cisco IOS-XE programmability, Ansible, and API-driven workflows for zero-touch provisioning and lifecycle management

What we offer

medical, dental, and vision insurance
flexible spending or health savings account
life, and AD&D insurance
short-and long-term disability coverage
paid time off
employee assistance
participation in a 401k program with company match
bonus

Fulltime

Packet Core Design Engineer

Randstad

Location:
United Kingdom , London

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Job Description:

Job Responsibility:

Requirements:

Additional Information:

Job Posted:
February 25, 2026

Expiration:
March 13, 2026

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Randstad

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Job Description:

Job Responsibility:

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Expiration:March 13, 2026

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