senior software engineer

ai engineer

data engineer

software engineer

full stack engineer

network engineer

ONNEC Group

<div><p>ONNEC is now the UK&rsquo;s largest pure play physical IT infrastructure, network, and connectivity companies, with expertise throughout the data centre, office, and smart building environments.</p>
<p>We are recruiting for an experienced <b>Focal Network Engineer</b> to join our team in providing technical engineering duties on our projects and support contracts. The <b>Focal Network Engineer</b> will have a hybrid role in supporting managed service customers and undertaking project work.</p>
<p><b>Candidates must aspire to achieve a minimum level accreditation of Cisco CCNP Routing &amp; Switching (or other Enterprise vendor) and have demonstrable experience in technical design, configuration and fault finding.</b></p>
<p><b>Required Knowledge / Experience:
</b></p><ul><li>Experience of Enterprise networking deployment across Routing, Switching, Wireless and Security hardware platforms.</li>
<li>Good working understanding of Network Server builds to deliver DHCP/DNS/AD services across both physical and virtual machines.</li>
<li>Appreciation of the Azure global cloud computing platform</li>
<li>VRF/VLAN/IP Configuration</li>
<li>PRTG configuration and monitoring experience</li>
<li>Firewall policies, access lists and rule sets creation and modification.</li>
<li>Capable of converting high level network designs to low level network designs.</li>
<li>Vendor licensing registration/generation.</li>
<li>Maintains personal knowledge of vendor technology developments.</li>
<li>Familiarisation with Cisco suite of networking products including Nexus, Catalyst, Meraki, DNA and Prime</li>
<li>Essential minimum level accreditation of CCNP Routing &amp; Switching.</li>
<li>Clear and concise report writing.</li>
</ul>
<p><b><i>Additional duties:</i></b></p>
<ul><li>On-call standby rota to support 24x7 customers</li>
<li>Evaluation of supported estate for End of Life and End of Service notifications</li>
<li>Monitor and communicate technical bulletins for vendors especially around security.</li>
<li>Support requirements for out of hours customer BAU activities including PPM and Black Building tests.</li>
<li>Halo Service Desk configuration and monitoring</li>
<li>Proactive regular review and update of networking credentials for the support base</li>
</ul>
<p><b><i>Desirable</i></b></p>
<ul><li>Understand third party IP applications/concepts i.e., BMS, Lighting Controls, CCTV etc.</li>
<li>Cisco Software Defined Networking (DNA) configuration and deployment experience</li>
</ul>
<p>If you feel you have the required skills and experience, click <b>apply </b>now to be considered as our <b>Focal Network Engineer </b>&ndash; we&rsquo;d love to hear from you!</p></div>

Focal Network Engineer

Expleo Group

<div>Overview:
<div>
We are looking for an experienced Network Engineering Lead to provide hands-on technical leadership and operational coordination across a complex Operational Technology network environment. The successful candidate will ensure engineering activities are effectively prioritised, managed, and delivered, while driving visibility, governance, and successful outcomes across both project and business-as-usual workstreams.</div>
Responsibilities:
<ul><li>Establish a single, clear view of all Operational Technology network team activities, risks, and dependencies.</li><li>
Ensure urgent and high-priority work is correctly sequenced, actively managed, and delivered.</li><li>
Coordinate and distribute engineering work across both projects and BAU activities.</li><li>
Remove blockers and ensure progress across parallel workstreams.</li><li>
Maintain momentum against critical work deadlines.</li><li>
Ensure changes are delivered safely within a live Operational Technology networking environment.</li><li>
Escalate complex issues and support incident response where required.</li><li>
Raise risks, gaps, and delays early.</li><li>
Maintain visibility of work across the Operational Technology network estate.</li><li>
Ensure effective prioritisation and progression of engineering activities.</li></ul>
Essential skills:
<ul><li>Good understanding of:<ul><li>
Firewalls</li><li>
IP Routing and Switching</li><li>
SD-WAN</li><li>
Cloud Connectivity</li><li>
Network Security Technologies</li></ul></li></ul>
Desired skills:
<ul><li>Advantageous Experience:<ul><li>
FortiGate</li><li>
Check Point</li><li>
SD-WAN</li><li>
ExpressRoute</li><li>
BGP</li></ul></li></ul>
Experience:
<ul><li>Recent experience within enterprise network environments.<ul><li>
Experience guiding configuration activities involving:</li><li>
Routers</li><li>
Firewalls</li><li>
Network estate infrastructure</li><li>
Experience working within established guidelines and standards.</li></ul></li></ul>
Benefits:
<ul><li>Collaborative working environment &ndash; we stand shoulder to shoulder with our clients and our peers through good times and challenges</li><li>
We empower all passionate technology loving professionals by allowing them to expand their skills and take part in inspiring projects</li><li>
Expleo Academy - enables you to acquire and develop the right skills by delivering a suite of accredited training courses</li><li>
Competitive company benefits
</li><li>Always working as one team, our people are not afraid to think big and challenge the status quo</li></ul><div></div><ul><li><b><br>
As a Disability Confident Committed Employer we have committed to:</b></li><li><ul><li>
Ensure our recruitment process is inclusive and accessible</li><li>
Communicating and promoting vacancies</li><li>
Offering an interview to disabled people who meet the minimum criteria for the job</li><li>
Anticipating and providing reasonable adjustments as required</li><li>
Supporting any existing employee who acquires a disability or long term health condition, enabling them to stay in work at least one activity that will make a difference for disabled people</li></ul></li></ul><div></div><div><br>
&ldquo;We are an equal opportunities employer and welcome applications from all suitably qualified persons regardless of their race, sex, disability, religion/belief, sexual orientation or age&rdquo;.</div><div></div><div><b><br>
We treat everyone fairly and equitably across the organisation, including providing any additional support and adjustments needed for everyone to thrive</b></div><div></div><div><br>
#LI-BM</div><div>
#LI-DS1</div></div>

Network Engineer Lead

Ciena

<div><p>As the global leader in high-speed connectivity, Ciena is committed to a people-first approach. Our teams enjoy a culture focused on prioritizing a flexible work environment that empowers individual growth, well-being, and belonging. We&rsquo;re a technology company that leads with our humanity&mdash;driving our business priorities alongside meaningful social, community, and societal impact.</p><p></p><p><b>
Network Engineer, Early in Career</b></p><p></p><div><div>
Making a difference through the design and implementation of leading network technologies defines this early-career engineering role at Ciena. The position contributes to delivering high-quality network solutions and supports customer deployments with measurable impact. The role operates within a collaborative and inclusive environment focused on innovation and technical excellence.</div><div></div><div><b>
How you will make an impact:</b></div><ul><li>
Deliver post-sales solution engineering activities including solution design, acceptance, remote deployment, and network reconfiguration or migration under senior engineer supervision</li><li>
Interface with Systems Engineers, Service Project Managers, Technical Support, Field Service Engineers, and Customer Service Advocate teams to coordinate delivery activities</li><li>
Analyze network designs to enable consistent deployment and in-service upgrades of network equipment</li><li>
Translate network designs into solution designs for new builds, reconfiguration, and network upgrade projects</li><li>
Gather and analyze customer network data to develop migration strategies for transition onto platform solutions</li><li>
Review technical deployment packages with internal and external stakeholders to ensure clarity and alignment across deployment teams</li><li>
Troubleshoot and resolve technical deployment package issues in collaboration with engineering, customer, and internal teams</li></ul><div></div><div><b>
The must haves:</b></div><ul><li>
Education: Bachelor&rsquo;s degree in Electrical Engineering, Optical Engineering, or a related field</li><li>
Experience: Not more than 1 year of experience in a related discipline</li><li>
Application of Layer 0/1 optical or transmission technologies and/or</li><li>
Application of Layer 2-3 networking concepts including IP protocols</li><li>
Application of scripting or DevOps tools such as Python, Java, or Ansible</li><li>
Demonstrated ability to collaborate with cross-functional teams to resolve issues and establish best practices</li><li>
Ability to review and analyze project information to translate conceptual designs into implementation processes</li></ul><div></div><div><b>
Nice to haves:</b></div><ul><li>
Customer service interaction in technical environments</li><li>
Written and verbal communication in English</li><li>
Utilization of MS Office applications including Visio, Excel, and PowerPoint</li><li>
Ability to travel approximately 25%</li><li>
Ability to work during night maintenance windows approximately 25%</li><li>
Ability to manage multiple projects simultaneously</li><li>
Communications or technology-focused career interest</li></ul></div><p></p><p>
.</p><p><br>
At Ciena, we are committed to building and fostering an environment in which our employees feel respected, valued, and heard. Ciena values the diversity of its workforce and respects its employees as individuals. We do not tolerate any form of discrimination.</p><p></p><p>
Ciena is an Equal Opportunity Employer, including disability and protected veteran status.</p><p></p><p>
If contacted in relation to a job opportunity, please advise Ciena of any accommodation measures you may require.</p></div>

Network Engineer - New Grad

CoreWeave Europe

<div><div><div><div><div><div><div>CoreWeave is The Essential Cloud for AI&trade;. Built for pioneers by pioneers, CoreWeave delivers a platform of technology, tools, and teams that enables innovators to build and scale AI with confidence. Trusted by leading AI labs, startups, and global enterprises, CoreWeave combines superior infrastructure performance with deep technical expertise to accelerate breakthroughs and turn compute into capability. Founded in 2017, CoreWeave became a publicly traded company (Nasdaq: CRWV) in March 2025. Learn more at www.coreweave.com.</div>
<div></div>
<div>We're proud to be a Living Wage accredited Employer.</div></div></div><br>
</div>
</div></div><p></p><h3 class="jobSectionHeader"><b>What You'll Do:</b></h3>
<p>
CoreWeave is building and operating some of the largest GPU infrastructure in the world. The Metal Net team owns the high-bandwidth GPU interconnect platforms that make large-scale AI and HPC workloads possible, including NVLink and NVSwitch-based systems. We deploy, operate, troubleshoot, and improve these platforms across our global data centre footprint to provide a powerful alternative to traditional hyperscalers.</p>
<p><b>
About the role:</b></p>
<p>
We are looking for an HPC Engineer to join our team to deploy, operate, and support NVLink/NVSwitch platforms across large data centre environments. This role is a strong fit for engineers who enjoy production troubleshooting, hardware-adjacent systems work, automation, observability, and learning specialized infrastructure deeply. You will be responsible for troubleshooting Linux, networking, hardware, firmware, performance, and stability issues in production, while building automation to improve runbooks, dashboards, alerts, and lifecycle workflows. Additionally, you will participate in rotating on-call shifts, lead incident responses, conduct root cause analyses, and collaborate cross-functionally across CoreWeave to ensure reliable workflows scale effectively as our global fleet grows.</p>
<h3 class="jobSectionHeader"><b>
Who You Are:</b></h3>
<ul><li>Strong Linux system administration and engineering troubleshooting skills.</li>
<li>Solid grasp of networking fundamentals and common diagnostic/troubleshooting tools.</li>
<li>Hands-on production debugging experience using logs, metrics, and command-line interfaces.</li>
<li>Technical experience troubleshooting server, network, GPU, or data centre hardware.</li>
<li>Practical scripting or automation experience using Python, Go, Bash, or similar languages.</li>
<li>Clear written and verbal communication, documentation skills, and readiness to participate in an on-call rotation.</li>
<li>High curiosity to deeply learn specialized GPU interconnect technologies such as NVLink, NVSwitch, and InfiniBand.</li></ul><br>
<p></p>
<p><b>
Preferred:</b></p>
<ul>
<li>Experience with Ansible or other infrastructure-as-code and configuration automation tooling.</li>
<li>Kubernetes application development or live platform operations experience.</li>
<li>Familiarity with modern observability systems, including Grafana, Prometheus, PromQL, or similar stack components.</li>
<li>Experience managing large fleet operations across Linux systems, network devices, GPUs, or infrastructure components.</li>
<li>Deep understanding of InfiniBand, RDMA, HPC networking, or low-latency/high-bandwidth fabrics.</li>
<li>Experience with BMC, Redfish, IPMI, firmware lifecycle management, or hardware management APIs.</li>
<li>Exposure to NVLink, NVSwitch, NVIDIA GPU platforms, NVUE, SONiC, or specialized network operating systems.</li>
</ul>
<p><b>Wondering if you're a good fit?</b></p>
<p>
We believe in investing in our people, and value candidates who can bring their own diversified experiences to our teams even if you aren't a 100% skill or experience match. Here are a few qualities we've found compatible with our team. If some of this describes you, we'd love to talk.</p>
<ul>
<li><b>You love to</b> dive headfirst into production troubleshooting, hardware-adjacent systems work, and bringing robust automation to infrastructure at scale.</li>
<li><b>You're curious about</b> specialized GPU interconnect technologies, high-bandwidth platforms, and continuous system optimization.</li>
<li><b>You're an expert in</b> driving assigned work to completion with clear communication, thoughtful prioritisation, and keeping operations running smoothly.</li>
</ul><h3 class="jobSectionHeader"><b>Why CoreWeave?</b></h3>
<p>
At CoreWeave, we work hard, have fun, and move fast! We're in an exciting stage of hyper-growth that you will not want to miss out on. We're not afraid of a little chaos, and we're constantly learning. Our team cares deeply about how we build our product and how we work together, which is represented through our core values:</p>
<ul>
<li><b>Be Curious at Your Core</b></li>
<li><b>Act Like an Owner</b></li>
<li><b>Empower Employees</b></li>
<li><b>Deliver Best-in-Class Client Experiences</b></li>
<li><b>Achieve More Together</b></li>
</ul>
<p>We support and encourage an entrepreneurial outlook and independent thinking. We foster an environment that encourages collaboration and enables the development of innovative solutions to complex problems. As we get set for takeoff, the organisation's growth opportunities are constantly expanding. You will be surrounded by some of the best talent in the industry, who will want to learn from you, too. Come join us!</p>
<p>
The base salary range for this role is <b>&pound;79,000 to &pound;105,000</b>. The starting salary will be determined based on job-related knowledge, skills, experience, and market location. We strive for both market alignment and internal equity when determining compensation. In addition to base salary, our total rewards package includes a discretionary bonus, equity awards, and a comprehensive benefits program (all based on eligibility).</p><div><p><i>
To fulfill our obligation to protect client data, successful applicants offered employment with CoreWeave will be required to complete a basic criminal record check, conducted in compliance with GDPR. Employment offers are conditional upon receiving satisfactory check results</i></p>
<p><b>
What We Offer</b></p>
<p>
In addition to a competitive salary, we offer a variety of benefits to support your needs, including:</p>
<ul>
<li>Family-level Medical Insurance</li>
<li>Family-level Dental Insurance</li>
<li>Generous Pension Contribution</li>
<li>Life Assurance at 4x Salary</li>
<li>Critical Illness Cover</li>
<li>Employee Assistance Programme</li>
<li>Tuition Reimbursement</li>
<li>Work culture focused on innovative disruption</li>
</ul>
<p><i>Benefits may vary by location.</i></p>
<p><b>
Equal Opportunity</b></p>
<p><i>
CoreWeave is an equal opportunity employer, committed to fostering an inclusive and supportive workplace. All qualified applicants and candidates will receive consideration for employment without regard to race, color, religion, sex, disability, age, sexual orientation, gender identity, national origin, veteran status, or genetic information.</i></p>
<p><b>
Recruitment Agencies</b></p>
<p><i>
CoreWeave does not accept speculative CVs. Any unsolicited CVs received will be treated as the property of CoreWeave and your Terms &amp; Conditions associated with the use of CVs will be considered null and void.</i></p>
<p><i>
Any unsolicited CVs sent by your company to us &ndash; that is to say, in any situation where we have not directly engaged your company in writing to supply candidates for a specific vacancy &ndash; will be considered by us to be a &quot;free gift&quot;, leaving us liable for no fees whatsoever should we choose to contact the candidate directly and engage the candidate's services, and will in no way establish any prior claim by your company to representation of that candidate should the candidate's details also be submitted by any other party.</i></p>
<p><b>
Export Control Compliance</b></p>
<p>
This position requires access to export controlled information. To conform to U.S. Government export regulations applicable to that information, applicant must either be (A) a U.S. person, defined as a (i) U.S. citizen or national, (ii) U.S. lawful permanent resident (green card holder), (iii) refugee under 8 U.S.C. &sect; 1157, or (iv) asylee under 8 U.S.C. &sect; 1158, (B) eligible to access the export controlled information without a required export authorization, or (C) eligible and reasonably likely to obtain the required export authorization from the applicable U.S. government agency. CoreWeave may, for legitimate business reasons, decline to pursue any export licensing process.</p><br>
<p></p>
<p><b><i>
Updated privacy notice - UK and EU Job Applications</i></b></p>
<p><i>
When you apply to a job on this site, the personal data contained in your application will be collected by CoreWeave UK Ltd. (&quot;Controller&quot;), which is located at</i></p>
<p><i>
Phosphor (6th Floor), 133 Park Street, London, SE1 9EA</i></p>
<p><i>
and can be contacted by emailing </i><i>careers.eu@coreweave.com</i><i>. Controller's data protection officer can be contacted at </i><i>privacy@coreweave.com</i><i>. Your personal data will be processed for the purposes of managing Controller's recruitment related activities, which include setting up and conducting interviews and tests for applicants, evaluating and assessing the results thereto, and as is otherwise needed in the recruitment and hiring processes. Such processing is legally permissible under Art. 6(1)(f) of (i) Regulation (EU) 2016/679 (General Data Protection Regulation (&quot;GDPR&quot;) and (ii) the GDPR as it forms part of the laws of the UK (&quot;UK GDPR&quot;), as necessary for the purposes of the legitimate interests pursued by the Controller, which are the solicitation, evaluation, and selection of applicants for employment. Your personal data will be shared with Greenhouse Software, Inc., a cloud services provider located in the United States of America and engaged by Controller to help manage its recruitment and hiring process on Controller's behalf. With respect to transfers originating from the UK or the European Economic Area (&quot;EEA&quot;) to a country outside the UK or the EEA, we implement the appropriate transfer mechanism(s) and other appropriate solutions to address cross-border transfers as required by applicable law. You may request a copy of the suitable mechanisms we have in place by contacting us at </i><i>privacy@coreweave.com</i></p>
<p><i>
Your personal data will be retained by Controller as long as Controller determines it is necessary to evaluate your application for employment. Where permitted by applicable law, we may also retain your personal data for a limited period after the recruitment process ends in order to consider you for future job opportunities, respond to legal claims, or comply with record-keeping obligations. Under the GDPR and the UK GDPR, you have the right to request access to your personal data, to request that your personal data be rectified or erased, and to request that processing of your personal data be restricted. You also have the right to data portability. In addition, you may lodge a complaint with the relevant supervisory authority: (i) A list of Europe's data protection authorities can be found </i><i>here</i><i>; and (ii) for the UK, this is the </i><i>Information Commissioner's Office</i><i>.</i></p>
<p><i>
For additional information, please see our </i><i>Privacy Policy</i><i>.</i></p></div></div>

HPC Engineer, Metal Net

Halian | Managed Services, Recruitment Agency & Contract Staffing

<div>
 <p>
  <strong>
   Infrastructure Engineer
  </strong>
 </p>
 <p>
  We are a leading consultancy specialising in actuarial work, technology, and advanced analytics. We combine deep technical expertise with innovative thinking to help organisations make better decisions and build a stronger future.
 </p>
 <p>
  <br/>
 </p>
 <p>
  <br/>
  We are seeking an
  <strong>
   Infrastructure Enginee
  </strong>
  r to join our technology function. This role sits at the intersection of traditional infrastructure engineering and the expanding potential of automation and AI‑driven operations. With most of our environment hosted in Azure and a smaller on‑premise footprint, you&rsquo;ll work hands‑on across a broad range of technologies while contributing to our modern infrastructure strategy
 </p>
 <p>
  <br/>
 </p>
 <p>
  <strong>
   .
   <br/>
   What you&rsquo;ll be doi
  </strong>
 </p>
 <p>
  ngAs an Infrastructure Engineer, you wil
 </p>
 <ul>
  <li>
   l:Participate in a 24/7 major‑incident on‑call ro
  </li>
  <li>
   taDevelop, support, and enhance infrastructure across multiple office locations and cloud environmen
  </li>
  <li>
   tsDesign and implement standardised templates, configuration baselines, and self‑service models for efficient cloud resource provisioni
  </li>
  <li>
   ngBuild and support solutions across compute, storage, networking, physical infrastructure, software, COTS, open‑source tools, and cloud services (IaaS, PaaS, Saa
  </li>
  <li>
   S)Automate repetitive or manual tasks to reduce operational overhead and improve consisten
  </li>
  <li>
   cyMaintain secure infrastructure components, including identity and access management, patching, and disaster recove
  </li>
  <li>
   rySupport high‑availability operations through robust processes, monitoring, and controls across cloud and on‑prem workloa
  </li>
  <li>
   dsMaintain awareness of information security risks and apply appropriate controls to mitigate threa
  </li>
  <li>
   tsApply modern engineering practices and infrastructure standar
  </li>
  <li>
   dsWork with third‑party vendors to ensure the health and availability of hosted or outsourced servic
  </li>
  <li>
   esCollaborate with the Security Operations Centre on threat detection and incident response activiti
  </li>
  <li>
   esTake ownership of incidents and problems through to resolution or formal handov
  </li>
  <li>
   erConduct root‑cause analysis to identify and address underlying issu
  </li>
  <li>
   esTroubleshoot across a wide range of infrastructure technologi
  </li>
  <li>
   esWork collaboratively with colleagues across technical and non‑technical tea
  </li>
  <li>
   msAct as a second‑line escalation point for issues raised via self‑service channels or the Service De
  </li>
 </ul>
 <p>
  <br/>
 </p>
 <p>
  <strong>
   sk
   <br/>
   What we&rsquo;re looking
  </strong>
 </p>
 <ul>
  <li>
   forExperience managing infrastructure in a DevOps‑aligned environment, includi
   <strong>
    ng Infrastructure‑as‑C
   </strong>
   ode, automation, and enterprise monitoring tools (e.g., Ansible, Terraform, Zabbix, Azure Monit
  </li>
  <li>
   or)Strong experience wi
   <strong>
    th Linux server administrat
   </strong>
  </li>
  <li>
   ionHands‑on experience with Azure plus one of: AWS or Google Cl
  </li>
  <li>
   oudKnowledge of IP‑based networking, WAN technologies, virtualisation, cloud platforms, DHCP/DNS, Microsoft 365, and SAN/NAS stor
  </li>
  <li>
   ageExperience with modern event/log management, alerting, and workflow automation tools (e.g., Power Automate, Azure Log Analytics, Azure Monit
  </li>
  <li>
   or)Ability to take ownership of issues and coordinate cross‑functional resolut
  </li>
  <li>
   ionStrong analytical and troubleshooting skills, with the ability to break down complex problems and identify root cau
  </li>
  <li>
   sesExcellent organisational skills, with the ability to manage multiple workstreams and balance competing priorit
  </li>
  <li>
   iesSound judgement, pragmatism, and the ability to navigate changing demands effectiv
  </li>
 </ul>
 <p>
  <br/>
 </p>
 <p>
  ely
  <br/>
  This is a great opportunity to join
  <strong>
   an AWARD WINNING TEAM, 2 days on-site and 3
  </strong>
  days remot
 </p>
 <p>
  <br/>
 </p>
 <p>
  <strong>
   ely!
   <br/>
   Apply now to be considered interview slots avail
  </strong>
 </p>
 <p>
  <br/>
 </p>
 able!
</div>


Infrastructure Engineer

Marks & Spencer

Senior Software Engineer - AI

Software Engineering Manager - Web Platform

Explore 234+ Network engineer in London this July. Find roles across top companies and apply now to boost your career.