Trading Operations Engineer

Selby Jennings; Greater London; On-site; GBP 60,000 - 85,000; Full time

Job summary

A financial trading firm in London is seeking a Technical Operations Engineer to provide hands-on support for mission-critical systems. You will monitor and resolve production issues across trading infrastructure, manage broker connectivity, and actively contribute to automation improvements. Ideal candidates have 5+ years of experience supporting trading systems, strong Linux/Unix knowledge, and proficiency in Python and SQL. This role offers exposure in a high-availability environment with greater ownership and fewer layers.

Qualifications

• 5+ years supporting trading systems in a production environment.
• Strong Linux/Unix fundamentals and comfort at the command line.
• Solid understanding of FIX protocol and exchange connectivity.

Responsibilities

• Monitor, investigate, and resolve production issues across trading infrastructure.
• Manage exchange and broker connectivity, and coordinate system changes.
• Build runbooks, write automation, and extend monitoring tooling.

Skills

Production support for trading systems

Linux/Unix fundamentals

FIX protocol knowledge

Python scripting

Bash scripting

SQL proficiency

Networking basics

Monitoring tools familiarity

Job description

We're working with a trading firm looking to hire a Technical Operations Engineer into their London team. This is a hands‑on production support role sitting at the intersection of trading and infrastructure. You'll be the person keeping mission‑critical systems running, investigating issues end‑to‑end, and working directly alongside engineering and trading teams to keep things stable and performant.

This isn't a passive monitoring role. You'll own incidents from first alert through to post‑mortem, coordinate with exchanges and brokers on connectivity, and actively contribute to automation and observability improvements that make the platform better over time.

What you’ll be doing

Monitoring, investigating, and resolving production issues across the trading infrastructure. Managing exchange and broker connectivity, handling integrations, and coordinating system changes with internal teams and external vendors. Running incident management end‑to‑end, covering response, communication, review, and preventative action. Building runbooks, writing automation, and extending monitoring tooling to reduce toil and improve visibility. Working closely with engineering on performance optimisation and change control.

What we’re looking for

• 5+ years supporting trading systems in a production environment
• Strong Linux/Unix fundamentals and comfort at the command line
• Solid understanding of FIX protocol and exchange connectivity
• Python and Bash scripting for automation
• SQL proficiency covering querying, investigation, and making database changes
• Networking basics covering TCP/IP, multicast, and DNS
• Familiarity with monitoring tools and log analysis
• A working understanding of trading concepts and workflows including orders, executions, allocations, and market data

You’ll need to be someone who stays composed under pressure, communicates clearly with both technical and non‑technical stakeholders, and takes genuine ownership of problems rather than passing them along.

The environment

High‑availability, low‑latency trading infrastructure. The kind of place where uptime matters and the work you do is visible. If you’ve come from an investment bank, hedge fund, prop trading firm, or electronic trading environment and you’re looking for a role with more ownership and fewer layers, this is worth a conversation.