Platform & Application Engineer

Platform & Application Engineer – Systematic Trading Firm | London

A leading systematic trading firm is seeking an Application Platform Engineer to join a team responsible for the onboarding, operation, and continuous improvement of business-critical third-party platforms used across the organisation.

This is a highly varied role sitting at the intersection of Platform Engineering, DevOps, Site Reliability Engineering, and Application Support. The team owns a diverse estate spanning AWS, SaaS, and Linux/Windows on-premise environments, supporting everything from market data platforms and observability tooling through to collaboration and AI-enabled services.

You'll work closely with traders, quantitative researchers, developers, infrastructure teams, and external vendors, ensuring critical platforms remain reliable, scalable, and operationally efficient.

The Role:

• Support and operate a broad range of third-party platforms across AWS, SaaS, and on-premise environments
• Own the onboarding, configuration, maintenance, and continuous improvement of business-critical applications
• Manage platforms such as market data services, observability tooling, reporting platforms, collaboration tools, and AI-enabled services
• Design and maintain highly available application environments with a focus on performance and operational stability
• Troubleshoot issues across Linux, Windows, networking, cloud, and application layers
• Work directly with vendors and internal stakeholders to resolve incidents and improve platform reliability
• Perform root cause analysis and implement long-term engineering solutions
• Develop automation and tooling to reduce manual effort and improve operational efficiency
• Build monitoring, observability, and operational controls across the application estate
• Contribute to the evolution of engineering standards, operational processes, and platform governance

Requirements:

• 3+ years' experience within Platform Engineering, DevOps, Site Reliability Engineering, Linux Engineering, App Support, or a similar role
• Strong Linux administration and troubleshooting capability
• Experience supporting production platforms within complex technical environments
• AWS experience, ideally including services such as ECS, RDS, and IAM
• Experience with Infrastructure-as-Code and configuration management tools such as Terraform and Ansible
• Strong scripting and automation skills using Python, Bash, or PowerShell
• Experience with monitoring and observability platforms such as Grafana, Splunk, Prometheus, or similar
• Understanding of networking fundamentals and application connectivity troubleshooting
• Experience working with Git-based workflows and modern engineering practices

Desirable:

• Experience supporting market data platforms
• Exposure to SaaS platform administration
• Financial services experience
• Familiarity with GitHub, Slack, OpsGenie, and related tooling

Company Highlights:

• Technology-led culture – drives both trading and internal engineering investment
• Significant growth across compute, storage, and networking platforms creating a strong pipeline of upcoming projects
• Opportunity to work on challenging infrastructure and platform engineering problems within a large-scale HPC environment
• c.2,000 employees – large enough for scale, small enough for meaningful individual impact
• Brand-new London HQ with free on-site gym
• Flat organisational structure with direct exposure to senior technical leadership
• Highly collaborative culture with close interaction between engineering, research, and trading functions
• Excellent Glassdoor ratings consistently citing a strong work-life balance
• Strong focus on innovation, automation, and engineering excellence
• Benefits: Free breakfast & lunch, 13% pension, year-one guaranteed bonus, work abroad allowance, private healthcare, relocation packages, and more.