Senior Python Engineer
First seen by Alion on Nov 9, 2026. EPAM Systems scores D on the Alion truth index.
Every trading application faces the challenge of staying reliable under real-time demands and constant change. The Senior Python Engineer role in Zurich is part of a managed application services project covering production operations and change delivery across six application domains. The IT Commando team works where technical excellence and hands-on support meet, designing and supporting mission-critical trading applications. You decide how production issues are resolved and recurring tasks are automated, shaping the way business users interact with their tools. The person in this role makes it possible for trading operations to keep moving without interruption.
Responsibilities
Design, develop and maintain applications that meet business requirements
Support existing applications in production and proactively propose solutions to streamline and improve them
Advise and support business users who develop their own tools, sharing expertise and promoting engineering best practices
Provide 1st/2nd-level support for business-critical applications; take the harder cases and escalate with full context
Analyse data and issues with Python (Pandas) and SQL
Design scripts and small tools for checks, data handling and automation
Perform Linux and AWS operations; contribute to CI/CD
Record work in Jira and keep runbooks current
Guide the less experienced Commando and take on additional applications and support scope as the managed service ramps up
Requirements
Master's degree in Computer Science or equivalent
Strong Python (5+ yrs) with hands-on experience using Pandas
Good knowledge of Excel and Excel VBA
Solid software engineering background and SQL (writing and optimizing queries)
Hands-on experience in 1st or 2nd-level support of business-critical applications
Experience administering Linux environments
Full-stack development experience
Fluent English language knowledge
Nice to have
Also valued: Java, Bash scripting, C#/.NET, Outlook VBA, UI development, NoSQL databases, CI/CD
Experience with Azure/AWS/GCP
Exposure to FinTech or trading environments is an advantage
French and/or German language skills