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Application Support Engineer

Selby Jennings

City Of London

On-site

GBP 35,000 - 55,000

Full time

5 days ago

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Job summary

A leading proprietary trading firm is seeking a technically curious Application Support Engineer to join their Unified Platform Support team. This role involves supporting high-performance systems for market data processing and regulatory reporting, with opportunities for deep technical engagement and collaboration with developers.

Qualifications

Experience supporting high-performance applications in finance.
Strong Linux skills and command-line comfort.
Ability to debug object-oriented code (Java, Python preferred).

Responsibilities

Monitor production systems supporting regulatory reporting.
Investigate and resolve data-related alerts and system issues.
Collaborate with developers to troubleshoot complex issues.

Skills

Linux

Analytical skills

Problem-solving

SQL

Java

Python

Version control

Tools

AWS

Kubernetes

Kafka

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Consultant - Technology Infrastructure Recruitment Selby Jennings

We're looking for a technically curious Application Support Engineer to join the Unified Platform Support team at a leading proprietary trading firm. You'll work closely with developers to support complex, high-performance systems used for market data processing, regulatory reporting, and compliance analytics. This is a hands-on role that gives you the freedom to dig into issues - sometimes right down to the code.

Key Responsibilities

Monitor and operate production systems supporting regulatory reporting and surveillance functions
Investigate and resolve data-related alerts and system issues, including code-level debugging when necessary
Collaborate with developers to troubleshoot complex issues and drive long-term improvements
Provide L1/L2 support to users across the firm (typically 2-10 issues per day), escalating to L3 when required
Assist in onboarding new teams and applications to the platform support model
Continuously refine monitoring processes and documentation as the platform evolves

What We're Looking For

Experience supporting and troubleshooting high-performance applications in a financial services environment
Strong Linux skills and comfort working in command-line environments
Understanding of market data and/or order data systems, including protocols like FIX or exchange-native formats
Strong analytical and problem-solving mindset
Ability to navigate or debug object-oriented code (Java and Python preferred)
Familiarity with version control tools (Git or SVN)
SQL proficiency - from writing queries to basic database operations
Exposure to cloud infrastructure, ideally AWS
Bonus: Experience with streaming/data tools such as Kafka, Spark, or Delta Lake

Technology Stack & Environment

You'll be working with:

AWS, Kubernetes, Kafka, Argo
Java 17, Python 3, HDF5
Distributed systems processing large volumes of market and order data
A globally distributed team covering Europe and North America

Why Join This Team?

Work closely with developers and gain exposure to complex systems architecture
Be empowered to investigate issues deeply and shape solutions
Join a respectful, collaborative culture that values outcomes over process
Use the right tools for the job - and keep learning as the tech evolves

Seniority level

Seniority level
Entry level

Employment type

Employment type
Full-time

Job function

Job function
Finance
Industries
Funds and Trusts

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