Senior Site Reliability Engineer - HFT Team (F/M/D)

Dubizzle Limited; Greater London; On-site; GBP 70,000 - 90,000; Full time

Job summary

A global financial institution is seeking a Site Reliability Engineer for its High-Frequency Trading team in Greater London. You will build and maintain secure environments across cloud and bare-metal datacenters while automating processes. The ideal candidate has a strong background in Kubernetes, AWS, and DevOps practices, looking to innovate within the financial markets infrastructure. This role offers a dynamic work environment with a focus on efficiency and transparency in trading operations.

Benefits

100% health coverage

Team events and offsites

Qualifications

• Five years of experience in Site Reliability, DevOps, or Platform Engineering.
• Strong experience with Kubernetes and AWS.
• Excellent knowledge of Terraform and Python.

Responsibilities

• Support traders and researchers in building a trading platform.
• Manage performant and secure environments across multiple datacenters.
• Automate processes to improve efficiency.

Skills

Kubernetes

AWS

Ansible

Linux sysadmin (Ubuntu/Debian)

Terraform

Python

Git

FinTech experience

Education

Degree in Engineering/Computer Science

Tools

Terraform

GitHub Actions

Grafana

Prometheus

Job description

Flowdesk's mission is to build a global financial institution for digital assets, one designed from the ground up for market integrity and efficiency.

To achieve this in a rapidly evolving market, we apply a disciplined, first-principles approach to everything we do. This approach is embedded in our core services, from institutional liquidity provision, trading solutions, OTC execution to our comprehensive treasury management offerings. This is how we cut through the noise and build robust and scalable systems across all our business lines.

We seek individuals who are driven by this systematic approach. Joining Flowdesk means you will be a key contributor in building and scaling a more transparent and efficient financial markets infrastructure.

Our High‑Frequency Trading (HFT) team is focused specifically on quantitative, model‑driven strategies. This group develops short‑term signals, simulations, and strategies designed to compete in highly competitive electronic markets.

As a Site Reliability Engineer in the HFT team, you will work on building, configuring, maintaining and monitoring performant and secure environments across multiple cloud and bare‑metal datacenters. The role is eclectic and requires multi‑disciplined engineers.

Your mission will be to

• Support traders, researchers and developers in building and managing a fast‑moving trading platform.
• Play a key part in evolving a business.
• Work with multiple cloud and datacentre vendors across multiple regions.
• Innovate rapidly with a product first mindset.
• Automate wherever possible.
• Bootstrap new technologies into the stack.

What We’re Looking For

• 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.
• Background in building and managing trading systems.
• Cloud neutral inter‑region networking.
• Experience with provisioning servers in the best location for minimal latency.
• Experience with Consul, Nomad and Vault.
• Experience with Certbot and Nginx (or other proxies).
• Experience with Netdata, Grafana, Prometheus, Loki, Alertmanager, Telegraf, OpenTelemetry.
• Experience with VPN technologies such as Wireguard, Tailscale, Cloudflare Zero Trust.
• Experience with GCP and Alibaba Cloud.
• Experience with bare‑metal providers such as OVH and Hetzner.
• Experience with relational and time‑series databases such as PostgreSQL and Clickhouse.
• Experience with Ceph, Kafka, Vector.
• Experience with Wiz, Crowdstrike.
• Experience running blockchain nodes for products such as Hyperliquid.
• Experience with specialist network providers such as Avelacom, BSO, Pico, and McKay Brothers.
• Be able to use tools like ChatGPT with suitable levels of pragmatism, enthusiasm and cynicism.
• Open‑source contributions.

• International environment (English is the main language)
• 100% health coverage
• Team events and offsites

Recruitment process

Are you interested in this job but feel you haven’t ticked all the boxes? Don’t hesitate to apply and tell us in the cover letter section why we should meet

Here’s what you can expect if you apply

1. HR Call with our Tech Talent Acquisition (30’)
2. Technical interview with Our Staff Site Reliability Engineer (60’)
3. Technical Meeting with our Quant Developer (30’) and our Lead Site Reliability Engineer (30’)
4. Wrap up interview with our TA Team (45’)
5. C‑Level interview (30’)

On the agenda, discussions rather than trick questions! These moments of exchange will allow you to understand how Flowdesk works and its values. But they are also (and above all) an opportunity for you to present your career path and your expectations for your next job.

We are committed to an inclusive and accessible recruitment process. If you require any reasonable adjustments or have specific needs to enable you to participate fully in the interview or assessment process (e.g., a sign language interpreter, extra time for a test, or an accessible location), please contact us to discuss how we can support you.