Infrastructure Team Lead

Quant Capital; Greater London; Hybrid; GBP 51,000 - 85,000; Full time

Benefits offered by this job

Hybrid work model

Bonus

Job summary

Quant Capital, a FinTech firm in South West London, seeks an Infrastructure Engineer to own core infrastructure and security engineering in a Microsoft/Azure environment. You will deliver projects spanning infrastructure, automation, and cloud security, acting as a technical escalation point.

You'll work across Windows, networking, identity, cloud, and security—owning problems end to end while guiding a small infra team in a hybrid in-office setting.

Qualifications

• Experience managing Windows Server and Windows client estates.
• Strong networking skills including VPN, DNS, and firewall concepts.
• Security-focused with patch management, vulnerability assessments and policy rollout.
• Experience in hybrid cloud/on-prem environments (Microsoft-centric).

Responsibilities

• Lead day-to-day management and support of IT infrastructure services.
• Design, implement, and maintain secure, scalable infrastructure solutions.
• Maintain high availability, resilience, and performance in hybrid environments.
• Oversee servers, storage, network, backup, and virtualization platforms.
• Ensure disaster recovery readiness and infrastructure security standards.
• Monitor security threats and respond to incidents; manage endpoint protection and email security.
• Lead and develop the Infra team with strong leadership and people management.

Skills

Windows Server

Active Directory

Intune

Entra

Microsoft 365

Group Policies

SharePoint

Teams

NTFS

Hybrid domains

Job description

Up to £85,000 + bonus and benefits

Hybrid 2:3 in office

Quant Capital is looking to speak to candidates to join a growing FinTech business based in South West London. Our is hiring an Infrastructure Engineer to take ownership of core infrastructure and security engineering across a modern Microsoft/Azure environment. This role suits someone who understands scale, cares about uptime, and thinks security-first. Real responsibility from day one.

You'll deliver projects across infrastructure, automation, and cloud security, while acting as a technical escalation point for internal teams. You'll work across Windows, networking, identity, cloud, and security — owning problems end to end.

What you'll do

• Lead the day-to-day management and support of IT infrastructure services.
• Design, implement, and maintain secure, scalable, and resilient infrastructure solutions.
• Supporting our primarily Microsoft-based infrastructure, ensuring its high availability, resilience, and performance. Both hybrid cloud and on-premise environments.
• Oversee server, storage, network, backup, cloud and virtualisation platforms.
• Ensure infrastructure availability, performance, and disaster recovery readiness.
• Maintain infrastructure security standards, patching, and compliance requirements.
• Monitor, identify, investigate, and respond to security threats and vulnerabilities.
• Manage endpoint protection, firewalls, SIEM, MFA, email security, and access controls.
• Implement and maintain security standards, policies, and best practices.
• Work with third-party security providers as required.
• Leadership and Team Management
• Lead and develop the small Infra team, strong leadership and people management skills.

What you'll need

• A high level of experience with Microsoft technologies including Windows Server andDesktop, Active Directory, Entra, Hybrid domains, Group Policies, 365, Intune, Teams,SharePoint, NTFS etc.
• Networking - TCP/IP, VLANS, VPNs, Wi-Fi, DNS internal and Global DNS Providermanagement, good level of network hardware experience e.g. Cisco/Fortinet FortiGate.
• Security - this role is highly focused on security with knowledge of the following

System security hardening, vulnerability assessments and patch management.

Policy creation and roll out

Security Best practices across all environments

Security Compliance - GDPR, PCI, ISO27001

Working with external Pen Testers

Antivirus Management - Oversight of incidents and roll out of new policies following bestpractices and adaptation to emerging threats.

Cyber Security Tools - Management across Endpoints, email, networks, Incident response

Email Security Management

Certificate Management - installation and renewal of SSL/TLS certificates on web servers,network devices etc.

Domain management - both internal and external

• Human Firewall - Have oversight on tools such as Knowbe4 for Staff Training and securityawareness. Work with the Training team to roll out new procedures and materialy
• Ideally some understanding of MS SQL Database administration.