Whitehall Resources Ltd
ENET Engineer Whitehall Resources are currently looking for a ENET Engineer based in London 3 days a week, remainder remote for an initial 6-month contract. *INSIDE IR35.* Role Description Key Responsibilities: Deliver and support low latency connectivity and monitoring solutions for the Global Markets business, aligned with Front Office trading and regulatory needs. Apply SRE principles to improve availability, latency, performance, and capacity planning across trading infrastructure. Collaborate with network and platform engineers to design reliable, self-healing systems and reduce manual intervention through automation. Own and execute the Global Markets connectivity roadmap, from project delivery through to operational handoff and life cycle management. Partner with business stakeholders and platform owners to ensure infrastructure and observability tooling meets evolving trading requirements. Monitor and manage capacity and performance of global connectivity systems, working with regional teams to aggregate local intelligence. Conduct deep-dive post-incident analysis and forensic reviews during high-impact market events (eg, non-farm payroll), using packet analysis to identify systemic improvements. Develop and maintain automated alerting, health checks, and dashboards, supporting proactive detection of issues and system degradation. Lead lab-based testing and benchmarking initiatives for new connectivity solutions, ensuring readiness for production deployment. Produce operational and performance KPIs, SLO/SLI metrics, and executive summaries to support senior decision-making. Champion continuous improvement and innovation, driving technology adoption in monitoring, resiliency, and incident response tooling. Key Skills: Strong background in low latency network engineering, including TCP/IP, multicast, traffic shaping, and performance analysis. Proven experience with packet capture and analysis tools (Wireshark, tcpdump, Corvil/PICO); ability to build custom decoders is highly advantageous. Familiarity with SRE tools and practices, including infrastructure as code (IaC), CI/CD pipelines, error budgets, and reliability-focused SLIs/SLOs. Experience supporting Real Time trading applications, including feed handlers, matching engines, and algo trading platforms. Strong working knowledge of messaging Middleware (Solace, 29West, Tibco, LBM, or equivalent) in performance-sensitive environments. Proficient in Scripting and automation using Python, Bash, or PowerShell to streamline monitoring, alerting, and recovery workflows. Knowledge of FIX, market data, and order routing protocols in a trading environment. Exposure to observability platforms such as ITRS Geneos, Prometheus, Grafana, or custom telemetry stacks. Comfortable working across Linux systems, hybrid infrastructure, and global production environments. Excellent communication and reporting skills, with ability to translate technical data into actionable business insights. All of our opportunities require that applicants are eligible to work in the specified country/location, unless otherwise stated in the job description. Whitehall Resources are an equal opportunities employer who value a diverse and inclusive working environment. All qualified applicants will receive consideration for employment without regard to race, religion, gender identity or expression, sexual orientation, national origin, pregnancy, disability, age, veteran status, or other characteristics.
ENET Engineer Whitehall Resources are currently looking for a ENET Engineer based in London 3 days a week, remainder remote for an initial 6-month contract. *INSIDE IR35.* Role Description Key Responsibilities: Deliver and support low latency connectivity and monitoring solutions for the Global Markets business, aligned with Front Office trading and regulatory needs. Apply SRE principles to improve availability, latency, performance, and capacity planning across trading infrastructure. Collaborate with network and platform engineers to design reliable, self-healing systems and reduce manual intervention through automation. Own and execute the Global Markets connectivity roadmap, from project delivery through to operational handoff and life cycle management. Partner with business stakeholders and platform owners to ensure infrastructure and observability tooling meets evolving trading requirements. Monitor and manage capacity and performance of global connectivity systems, working with regional teams to aggregate local intelligence. Conduct deep-dive post-incident analysis and forensic reviews during high-impact market events (eg, non-farm payroll), using packet analysis to identify systemic improvements. Develop and maintain automated alerting, health checks, and dashboards, supporting proactive detection of issues and system degradation. Lead lab-based testing and benchmarking initiatives for new connectivity solutions, ensuring readiness for production deployment. Produce operational and performance KPIs, SLO/SLI metrics, and executive summaries to support senior decision-making. Champion continuous improvement and innovation, driving technology adoption in monitoring, resiliency, and incident response tooling. Key Skills: Strong background in low latency network engineering, including TCP/IP, multicast, traffic shaping, and performance analysis. Proven experience with packet capture and analysis tools (Wireshark, tcpdump, Corvil/PICO); ability to build custom decoders is highly advantageous. Familiarity with SRE tools and practices, including infrastructure as code (IaC), CI/CD pipelines, error budgets, and reliability-focused SLIs/SLOs. Experience supporting Real Time trading applications, including feed handlers, matching engines, and algo trading platforms. Strong working knowledge of messaging Middleware (Solace, 29West, Tibco, LBM, or equivalent) in performance-sensitive environments. Proficient in Scripting and automation using Python, Bash, or PowerShell to streamline monitoring, alerting, and recovery workflows. Knowledge of FIX, market data, and order routing protocols in a trading environment. Exposure to observability platforms such as ITRS Geneos, Prometheus, Grafana, or custom telemetry stacks. Comfortable working across Linux systems, hybrid infrastructure, and global production environments. Excellent communication and reporting skills, with ability to translate technical data into actionable business insights. All of our opportunities require that applicants are eligible to work in the specified country/location, unless otherwise stated in the job description. Whitehall Resources are an equal opportunities employer who value a diverse and inclusive working environment. All qualified applicants will receive consideration for employment without regard to race, religion, gender identity or expression, sexual orientation, national origin, pregnancy, disability, age, veteran status, or other characteristics.
IT Jobs
London, UK
Description
Job Title: Senior Network & Security Engineer
Purpose of Role:
To design, implement, maintain, troubleshoot and support all aspects of network and security on the Options PIPE network infrastructure.
As a member of the UK Networks team, the senior network engineer will work closely with the global network team (US and Asiapac). They will be responsible for the timely delivery of changes to the network environment to facilitate the onboarding of new clients, to deliver new features or service to the PIPE platform or to correct production issues.
Key Tasks:
The role requires a flexible, highly skilled engineer who is capable of managing multiple work streams in a fast-paced service provider environment. Teamwork and ability to work on own initiative is imperative for the role which includes (but is not restricted to the following key areas):
New Client Solutions/Designs:
Involves design and implementation of new client network architecture ready for client on-boarding in to our private cloud, the Options PIPE®. These designs range from (but are not limited to) redundant Gig-E connections to multiple OTL datacentres, site to site VPNs, data centre x-connects, secure web hosting services and layered firewall security, through to software VPN access, and home/office network connectivity using site-to-site Internet VPNs.
Ideally the candidate will have performed firewall migrations in the past.
Evolution of PIPE services:
Example projects include data centre Greenfield builds, data centre relocation projects, and global deployments of new network/application services. In doing so, you will use a wide range of enterprise-level network and security technologies including Catalyst switches, Cisco routers (39xx/29xx) and Nokia Checkpoint firewalls.
3rd Party Network Connections:
Options provides broker/venue connectivity as part of its PIPE Core® offering, typically to Tier 1 Investment Banks, brokers or pools of liquidity. We deliver these either via direct fibre circuits, via x-connects, or through the use of global MSP networks (e.g. BT Radianz, TNS).
Direct Exchange Connectivity:
Options provides connectivity to and market data services from the global catalogue of stock exchanges and venues/MTFs. We deliver ultra-low latency market data and on-exchange trading services. Currently connected exchanges include Nasdaq, NYSE, CME/CBOT, LSE, Deutsche Börse (Xetra/Eurex) as well as MTFs such as BATS Chi-X Europe and Direct Edge.
Technical Skills should include most of the following:
Security Platforms:
Fortinet Fortigates – in depth experience.
Checkpoint NGX R70/R75/R77 and Management Suite (SmartCenter, SmartUpdate, SmartView Tracker)
Nokia firewall platforms - experience implementing/installing/troubleshooting on
Linux
Will ideally be comfortable on a Linux platform and be able to install and maintain Linux based applications eg Cacti, Rancid etc
Scripting/coding
Will ideally have experience with scripting. Python preferred.
WAN Technologies:
IPSEC, GRE, E1/T1, ATM, PPP, HDLC, SONET, xDSL, WES/LES, SDSH, Dark fibre
LAN Technologies:
Gigabit Ethernet (GigE etc), TenGig Ethernet, Multicast (PIM/IGMP), Spanning-Tree (+extensions), switching, Vlan trunking EtherChannel (PAgP, LACP), SVI’s and inter-vlan routing, VOIP, QoS and DiffServ
Routing Protocols:
OSPF, BGP,RIP (v2), static routes, route re-distribution, policy-based routing
Multicast:
PIM-SM, MSDP
NMS and Troubleshooting Tools:
tcpdump, fwmonitor, Wireshark
WLAN Technologies:
Cisco Aironet deployment in either root or repeater mode
Familiarity with wireless security (WEP/WPA/WPA2)
Hardware:
Experience with our common platforms would be useful:
Fortinet – 30d, 60d, 200d, 1000d, 1500d
Cisco Catalyst switches – 65xx, 45xx, 3750, 3560 – 6500 platform particularly desirable
Cisco routers – 39xx, 38xx, 28xx, 88x, 87x
Arista switches – 7124, 7150
Juniper EX4200 series switches
Cisco 10Gb line modules
SolarFlare 10Gb network cards
Nokia Checkpoint firewalls – IP3xx, IP5xx, 46xx, 48xx
Fortinet FIrewalls
F5 BigIP DNS Load Balancers (GTM)
Wireless access points - 3560, 2950, Aironet 1242ag
Accreditation:
Fortinet Firewall accreditation (desirable)
Checkpoint accredited CCSA and above (desirable)
Cisco accreditation (desirable)
Description
Job Title: Senior Network & Security Engineer
Purpose of Role:
To design, implement, maintain, troubleshoot and support all aspects of network and security on the Options PIPE network infrastructure.
As a member of the UK Networks team, the senior network engineer will work closely with the global network team (US and Asiapac). They will be responsible for the timely delivery of changes to the network environment to facilitate the onboarding of new clients, to deliver new features or service to the PIPE platform or to correct production issues.
Key Tasks:
The role requires a flexible, highly skilled engineer who is capable of managing multiple work streams in a fast-paced service provider environment. Teamwork and ability to work on own initiative is imperative for the role which includes (but is not restricted to the following key areas):
New Client Solutions/Designs:
Involves design and implementation of new client network architecture ready for client on-boarding in to our private cloud, the Options PIPE®. These designs range from (but are not limited to) redundant Gig-E connections to multiple OTL datacentres, site to site VPNs, data centre x-connects, secure web hosting services and layered firewall security, through to software VPN access, and home/office network connectivity using site-to-site Internet VPNs.
Ideally the candidate will have performed firewall migrations in the past.
Evolution of PIPE services:
Example projects include data centre Greenfield builds, data centre relocation projects, and global deployments of new network/application services. In doing so, you will use a wide range of enterprise-level network and security technologies including Catalyst switches, Cisco routers (39xx/29xx) and Nokia Checkpoint firewalls.
3rd Party Network Connections:
Options provides broker/venue connectivity as part of its PIPE Core® offering, typically to Tier 1 Investment Banks, brokers or pools of liquidity. We deliver these either via direct fibre circuits, via x-connects, or through the use of global MSP networks (e.g. BT Radianz, TNS).
Direct Exchange Connectivity:
Options provides connectivity to and market data services from the global catalogue of stock exchanges and venues/MTFs. We deliver ultra-low latency market data and on-exchange trading services. Currently connected exchanges include Nasdaq, NYSE, CME/CBOT, LSE, Deutsche Börse (Xetra/Eurex) as well as MTFs such as BATS Chi-X Europe and Direct Edge.
Technical Skills should include most of the following:
Security Platforms:
Fortinet Fortigates – in depth experience.
Checkpoint NGX R70/R75/R77 and Management Suite (SmartCenter, SmartUpdate, SmartView Tracker)
Nokia firewall platforms - experience implementing/installing/troubleshooting on
Linux
Will ideally be comfortable on a Linux platform and be able to install and maintain Linux based applications eg Cacti, Rancid etc
Scripting/coding
Will ideally have experience with scripting. Python preferred.
WAN Technologies:
IPSEC, GRE, E1/T1, ATM, PPP, HDLC, SONET, xDSL, WES/LES, SDSH, Dark fibre
LAN Technologies:
Gigabit Ethernet (GigE etc), TenGig Ethernet, Multicast (PIM/IGMP), Spanning-Tree (+extensions), switching, Vlan trunking EtherChannel (PAgP, LACP), SVI’s and inter-vlan routing, VOIP, QoS and DiffServ
Routing Protocols:
OSPF, BGP,RIP (v2), static routes, route re-distribution, policy-based routing
Multicast:
PIM-SM, MSDP
NMS and Troubleshooting Tools:
tcpdump, fwmonitor, Wireshark
WLAN Technologies:
Cisco Aironet deployment in either root or repeater mode
Familiarity with wireless security (WEP/WPA/WPA2)
Hardware:
Experience with our common platforms would be useful:
Fortinet – 30d, 60d, 200d, 1000d, 1500d
Cisco Catalyst switches – 65xx, 45xx, 3750, 3560 – 6500 platform particularly desirable
Cisco routers – 39xx, 38xx, 28xx, 88x, 87x
Arista switches – 7124, 7150
Juniper EX4200 series switches
Cisco 10Gb line modules
SolarFlare 10Gb network cards
Nokia Checkpoint firewalls – IP3xx, IP5xx, 46xx, 48xx
Fortinet FIrewalls
F5 BigIP DNS Load Balancers (GTM)
Wireless access points - 3560, 2950, Aironet 1242ag
Accreditation:
Fortinet Firewall accreditation (desirable)
Checkpoint accredited CCSA and above (desirable)
Cisco accreditation (desirable)
