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 integral 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. #Referment

📌 UNIX Application Support Engineer (Comunidad de Madrid)
🏢 Referment
📍 Comunidad de Madrid