UNIX Application Support Engineer (1B8A078)

Referment; Madrid; On-site; EUR 55,000 - 75,000; Full time

Benefits offered by this job

Performance bonus

Hybrid 3 days in office

International team

Cutting-edge trading systems

Job summary

Referment is partnering with a leading pan-European trading platform to hire a Unix Application Support Engineer in Madrid. You will join a high-performance, real-time trading environment supporting critical systems across Europe and beyond.

You will maintain production and test trading platforms, with focus on application support rather than pure sysadmin tasks, and you will help expand into the US market while working late shifts 16:00–00:00 CET and a hybrid model requiring 3 days in the

Qualifications

• Expert-level Unix/Linux command line experience is essential.
• Advanced scripting skills in Bash, Python, and/or Perl with strong logic.
• Fluent written and spoken English is essential.

Responsibilities

• Monitor trading platforms and respond to incidents.
• Troubleshoot, recover, and perform root cause analysis.
• Automate tasks and reporting (Bash, Python, Perl).
• Support deployments and change processes.
• Work with FIX/ITCH protocols and financial messaging.
• Analyze Unix system performance and capacity.
• Collaborate with Ops, QA, Dev, and Market Control teams.

Skills

Unix/Linux command line

Bash scripting

Python scripting

Perl scripting

Monitoring tools

Regular expressions

English proficiency

Tools

Nagios

Opsview

Zabbix

Job description

Referment is partnering with a leading pan-European trading platform to find a talented Unix Application Support Engineer to join their growing operations team in Madrid.

This is a fantastic opportunity to work in a high-performance, real-time trading environment, supporting critical systems that power financial markets across Europe and beyond.

The Role

You will be part of a highly skilled team responsible for supporting both production and test trading platforms, ensuring stability, performance, and reliability in a fast-paced environment.

This role is dedicated to application support, providing a great opportunity for those looking to apply their Unix skills to complex financial software systems. Please note that this is a specialized application support position rather than a pure system administration or cybersecurity role.

This role is particularly exciting as the business expands into the US market, meaning you will play a key part in supporting international trading activity. To support these global markets, applicants must be available to work a late shift pattern from 16:00 to 00:00 CET. We operate a hybrid working model, requiring team members to attend the office 3 days a week.

What You Will Be Doing

• Monitoring trading platforms and responding to incidents
• Troubleshooting, recovery, and root cause analysis
• Automating tasks and reporting (Bash, Python, Perl)
• Supporting application deployments and change processes
• Working with financial messaging protocols (FIX / ITCH)
• Analysing Unix system performance
• Collaborating with Ops, QA, Dev, and Market Control teams

What We Are Looking For

• Expert-level Unix/Linux command line experience is essential
• Advanced scripting skills in Bash, Python, and/or Perl, with the ability to demonstrate strong scripting logic and constructs
• Availability to work late shifts (16:00 to 00:00 CET)
• A proactive mindset with a clear focus on application support over system administration or cybersecurity
• Commitment to a hybrid working model, attending the office 3 days a week
• Solid troubleshooting and problem-solving ability
• Experience with monitoring tools and system performance
• Familiarity with regular expressions
• Fluent written and spoken English is essential
• Candidates must already be based in Spain with the right to work

Nice to Have

• Networking knowledge (TCP/IP, UDP, Multicast) and the ability to explain fundamental protocol differences
• Experience with low-latency systems
• Exposure to financial markets or trading environments, specifically with FIX or ITCH protocols
• Experience with monitoring tools like Nagios, Opsview, or Zabbix
• Spanish language skills (useful for local team interaction)
• Basic SQL or web technologies
• A short notice period

What Is On Offer

• Performance-related bonus
• Hybrid working (3 days in the office)
• Collaborative, international team environment
• Opportunity to work on cutting-edge trading systems

Please note: Candidates must already have the right to work in Spain and be locally based. No sponsorship or relocation assistance is available for this position.

If you are passionate about Application Support, automation, and high-availability environments, and want to work in a role where your impact is immediate and visible, we would love to hear from you.

#Referment