Senior Site Reliability Engineer, HFT

Flowdesk

full-time

Posted on: 9/30/2025

Location Type: Hybrid

Location: London • 🇬🇧 United Kingdom

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Job Level

Senior

Tech Stack

AnsibleAWSBootstrapCloudConsulGoogle Cloud PlatformGrafanaKafkaKubernetesLinuxNGINXPostgresPrometheusPythonTerraformVault

About the role

Build, configure, maintain and monitor performant and secure environments across multiple cloud and bare-metal datacenters.
Support traders, researchers and developers in building and managing a fast-moving trading platform.
Work on High-Frequency Trading (HFT) systems focused on quantitative, model-driven strategies (short-term signals, simulations, and strategies).
Play a key part in evolving the business and contribute to system design and operations.
Work with multiple cloud and datacentre vendors across multiple regions.
Innovate rapidly with a product-first mindset and bootstrap new technologies into the stack.
Automate wherever possible.
Collaborate across teams to build and scale transparent, efficient financial markets infrastructure.

Requirements

Degree in Engineering, Computer Science, or a related quantitative field.
Be prepared to innovate with new technologies to give our systems an edge.
Five years of experience in a Site Reliability, DevOps or Platform Engineering role.
Seriously good with Kubernetes (including Helm, Rook, Strimzi and Altinity).
Solid experience in AWS in multiple regions.
Strong experience with Ansible including writing OS and architecture independent roles and using dynamic inventories to gather facts.
Strong Linux sysadmin skills (mainly Ubuntu/Debian).
Excellent with Terraform using multiple providers across multiple regions.
A balanced security mindset.
Be able to integrate systems and software to build a powerful stack.
Using Python to manipulate data and integrate data sources using ReST and WebSockets.
Know your merge commit from your rebase in Git, and use Github Actions, CI/CD and collaborative software development practices.
Ownership mentality - you want to see your work make an impact and are accountable for results.
Collaborative, collegiate approach; you value working with peers to solve problems.
Determination to tackle hard problems and persistence to iterate until you find solutions.
FinTech and cryptocurrency experience.
Nice to Haves: Linux kernel and network tuning.
Nice to Haves: Background in building and managing trading systems.
Nice to Haves: Cloud neutral inter-region networking.
Nice to Haves: Experience with provisioning servers in the best location for minimal latency.
Nice to Haves: Experience with Consul, Nomad and Vault.
Nice to Haves: Experience with Certbot and Nginx (or other proxies).
Nice to Haves: Experience with Netdata, Grafana, Prometheus, Loki, Alertmanager, Telegraf, OpenTelemetry.
Nice to Haves: Experience with VPN technologies such as Wireguard, Tailscale, Cloudflare Zero Trust.
Nice to Haves: Experience with GCP and Alibaba Cloud.
Nice to Haves: Experience with bare-metal providers such as OVH and Hetzner.
Nice to Haves: Experience with relational and time-series databases such as PostgreSQL and Clickhouse.
Nice to Haves: Experience with Ceph, Kafka, Vector.
Nice to Haves: Experience with Wiz, Crowdstrike.
Nice to Haves: Experience running blockchain nodes for products such as Hyperliquid.
Nice to Haves: Experience with specialist network providers such as Avelacom, BSO, Pico, and McKay Brothers.
Nice to Haves: Be able to use tools like ChatGPT with suitable levels of pragmatism, enthusiasm and cynicism.
Nice to Haves: Open-source contributions.