Head of Infrastructure in City of London

Job description

Head of Infrastructure – Trading Technology

London – Hybrid

£Competitive + Bonus

Quant Capital is working with a global market-making firm looking for a Head of Infrastructure to lead the buildout and evolution of its trading platform across cloud and on-prem environments. This is a senior technical leadership role with full ownership of infrastructure strategy, delivery, and scale across low-latency trading systems.

This hire will drive a major AWS migration, build greenfield environments, modernise legacy systems, and shape the long-term engineering roadmap. You’ll lead a small but senior infrastructure function with real autonomy and impact.

The Role

• Own infrastructure architecture across cloud, on-prem and hybrid platforms
• Lead end-to-end AWS migration and modernisation strategy
• Build greenfield environments for trading and research workloads
• Design and operate highly available, low-latency global infrastructure
• Take ownership of Microsoft services, Active Directory and core networking
• Engineer secure connectivity across firewalls, routing and multi-site links
• Drive network security, segmentation and access control strategy
• Lead and grow a high-performing infrastructure/DevOps team
• Partner closely with engineering, trading and risk functions
• Automate provisioning and deployment with IaC (CloudFormation/Terraform/Ansible)
• Scale monitoring, cost optimisation and system reliability in production

Background

• 7+ years in infrastructure leadership within trading, market-making or high-performance engineering environments
• Strong AWS architecture and hybrid (cloud + on-prem) experience
• Deep networking background: routing, switching, low-latency connectivity
• Strong understanding of reliability engineering and autoscaling systems
• Prior experience building and scaling teams in high-performing environments
• Confident interacting with technical and trading leadership

Core Skills

• AWS (VPC, IAM, S3, ECS/EKS, Direct Connect, Transit Gateway, CloudFormation)
• Networking: BGP, OSPF, MPLS, VLANs, VPNs, SD-WAN
• Firewalls and network security (Cisco ASA, Fortinet or similar)
• Linux and Windows systems engineering
• Microsoft services and identity (AD/Entra ID)
• CI/CD (GitLab CI or similar)
• IaC and automation (CloudFormation, Ansible, Terraform)
• Monitoring/Observability (CloudWatch, Prometheus, Grafana)
• Scripting (Python, Bash)

This is a fantastic opportunity for a Senior Infrastructure Engineer with some light management and leadership skills to step into a Head role for a growing but small team and within a fast-paced market making business.

Extra information

Status

Open

Education Level

Secondary School

Location

City of London

Type of Contract

Part-time jobs

Published at

06-11-2025

Profession type

Accountancy

Full UK/EU driving license preferred

No

Car Preferred

No

Must be eligible to work in the EU

No

Cover Letter Required

No

Languages

English