Lead Edge Platform Security Engineer

Lead Edge Platform Security Engineer

Application Deadline

2 November 2026

Department

Product Mgmt - Product Promotion

Employment Type

Permanent - Full Time

Location

UK/Basingstoke

Reporting To

CTO Onebanx

Description

OneBanx

OneBanx builds and runs a fintech platform that powers self-service banking kiosks. We are looking for an experienced engineer who combines DevSecOps (development, security and operations) skills with a real passion for networking and network devices. The role brings together three areas of equal importance.

THE ROLE

Edge networking

you will own and improve the network that connects our kiosks, built on OpenWrt and pfSense devices deployed in the field and managed remotely as a fleet. This calls for hands-on experience with network devices and a strong interest in how they behave in real-world conditions.

DevOps enablement

our engineers already run much of their own infrastructure, so this is not about owning everything; you will set best practice, build the reusable GitLab pipeline and Terraform templates the team relies on, and support them where they need specialist help.

Security

you will drive most of our security work, from annual penetration test to pushing hardware suppliers to a higher security standard.

Key Responsibilities

Edge Networking

• Own the kiosk network end to end, from on-site devices through to the secure connection back to our platform
• Maintain and improve OpenWrt and pfSense configurations, firmware and upgrade processes across a remote fleet
• Act as the escalation point for connectivity issues and turn recurring problems into permanent fixes
• Lead the evolution of how devices connect and authenticate, moving towards a modern model where each device proves its identity and requests only the access it needs
• Keep site build standards and runbooks up to date so kiosks can be deployed and supported reliably

DevOps Enablement

• Build and maintain reusable GitLab CI/CD (continuous integration and delivery) pipeline templates, with security scanning built in
• Create Terraform best-practice templates and modules that the team can adopt for their own infrastructure
• Coach engineers on infrastructure-as-code, secrets handling and secure pipeline design, rather than doing it for them
• Support the team on infrastructure work outside their day-to-day expertise, and document it so it is repeatable
• Look after our self-managed GitLab instance, including routine upgrades
• Contribute to architecture decisions and write them up so the wider team understands the reasoning

Security

• Drive our security improvement work, reporting to the CTO
• Own the annual penetration test: scoping, managing the testing firm, triaging findings and tracking fixes to closure
• Maintain a security improvement backlog across cloud infrastructure, developer tooling and the kiosk estate
• Push our hardware and firmware suppliers to improve their security: assessments, patch commitments and contractual requirements
• Set the patching and vulnerability management cadence for infrastructure and network devices
• Own certificate, key and credential lifecycles, including rotation
• Support audits and customer security due diligence with clear evidence and documentation

What you will work on

A flavour of the problems this role will tackle:

• Edge Network: OpenWrt and pfSense devices deployed in the field and managed remotely as a fleet
• Device Identity: Moving towards a model where devices enrol, authenticate and request access securely
• Platform Templates: Shared GitLab CI/CD and Terraform templates that make the secure way the easy way for every team
• Secure Pipelines: Security scanning and secrets handling built into how every team ships
• Penetration Testing: Running the annual test and making sure findings are fixed, not just filed
• Supplier Security: Working with hardware and firmware suppliers to raise their security standards

Skills, Knowledge & Expertise

Education Level

BSc Computer Science, IT or software engineering related qualification (desirable)

REQUIRED SKILLS AND COMPETENCIES

We do not expect one person to be an expert in everything below; we do expect hands-on experience in each area, and real depth in at least one.

Core skills and technologies

• OpenWrt
• pfSense
• WireGuard / OpenVPN
• GitLab CI/CD
• Terraform
• AWS
• Linux / Shell / Python
• Secrets & Certificate Mgmt
• Penetration Testing
• Vulnerability Management
• Supplier Security
• Network Security

Essential — Networking & Devices

• Hands-on experience with OpenWrt and pfSense (or OPNsense) on real hardware
• VPN technologies such as WireGuard and OpenVPN: configuration, key management and troubleshooting
• Strong TCP/IP fundamentals: subnetting, routing, DNS, DHCP, VLANs and firewall design
• Experience managing remote devices where a mistake can mean a site visit

Essential — DevOps

• Writing and maintaining GitLab CI/CD pipelines, ideally including shared templates used across many projects
• Terraform: modules, remote state, state locking and safe plan/apply workflows
• Working knowledge of AWS, particularly networking and IAM (identity and access management)
• Comfortable in Linux and with scripting in shell and/or Python; familiar with administering self-hosted tools such as GitLab

Essential — Security

• Practical involvement in penetration testing: scoping, remediation planning and re-testing
• Vulnerability management: reading advisories, scoring severity and prioritising patches
• Secrets and certificate management in production environments
• Confidence working with third parties to agree and track security improvements

Desirable skills

The following are not required but will distinguish exceptional candidates:

Device Fleet & IoT

• Fleet management tooling for routers or other network devices
• IoT (Internet of Things) device identity and enrolment: device certificates, zero-touch provisioning, mutual TLS
• Cellular (4G/LTE) connectivity on Linux-based devices

Platform & Delivery

• Container platforms and image security scanning
• Policy-as-code or automated compliance checks in pipelines
• Centralised logging and monitoring for both cloud and remote devices

Security & Compliance

• Experience in fintech, payments or another regulated environment
• Supplier security assessment and third-party risk management
• Security certifications such as OSCP, CompTIA Security+ or CISSP (helpful, not essential)

Ideal candidate profile

Beyond technical credentials, we value engineers who embody the following:

• Passion for networks and devices: you enjoy the hands-on side as much as the automation
• Enabler, not gatekeeper: you raise the team’s capability rather than becoming a bottleneck
• Self-driven: you take the initiative on security and see improvements through without being chased
• Ownership mentality: you see problems through to a permanent fix
• Careful with change: you plan rollouts and rollbacks, whether for pipelines or for devices in the field
• Firm but constructive with suppliers: comfortable pushing vendors to meet the standard we need
• Clear communicator: able to explain risks and decisions to engineers and non-technical stakeholders alike