We are seeking a Senior Python Developer to take full ownership and maintain two critical Python-based derivative valuation systems.
You will ensure business continuity, collaborate closely with internal stakeholders, and drive modernization efforts aligned with technology strategy. Join us to contribute your expertise and help shape the future of these essential financial applications.
Responsibilities
Take end-to-end ownership of two Python backend derivative valuation systems to ensure continuous operation for external users
Review existing code, architecture, and integration points to independently understand the systems with limited knowledge transfer materials
Maintain and support applications by resolving incidents and ensuring stability with light SLA-based support
Collaborate directly with product teams and internal stakeholders to understand requirements and workflows
Serve as the primary technical liaison for queries and issues related to these systems
Perform debugging, security updates, and incident resolution to maintain application stability
Work in an agile environment to deliver incremental solutions and iterate based on business feedback
Propose modernization strategies to align systems with broader technology ecosystem and strategy
Coordinate with supporting engineers to delegate operational tasks effectively
Ensure adherence to security best practices for external-facing applications
Document system changes and updates to facilitate knowledge transfer and maintenance
Monitor system performance and optimize database queries with SQL Server backend
Analyze complex system issues and provide effective solutions
Support integration points with other internal tools and maintain robust security protocols
Requirements
Strong Python development experience with 3+ years working on backend systems involving complex financial or valuation models
Proven experience supporting production-grade external-facing applications
Proficiency with SQL Server including querying, debugging, and performance optimization
Experience with Python frameworks such as Flask, Pandas, and NumPy
Ability to reverse-engineer complex systems and rapidly gain ownership with minimal documentation
Knowledge of application integration and security protocols
Demonstrated ability to collaborate with business clients and translate requirements into technical solutions
Experience working in fast-paced agile delivery environments
Upper-Intermediate English language proficiency (B2)
Self-motivated with strong analytical and troubleshooting skills
Excellent verbal and written communication skills for client and stakeholder engagement
Experience with incident management and application maintenance
Ability to propose and drive application modernization initiatives
Familiarity with financial domain concepts related to derivatives and valuation models is a plus
Nice to have
Experience with Azure cloud native development
Knowledge of .NET and C# programming
Familiarity with lightweight front-end technologies such as JavaScript frameworks or React
Exposure to application modernization techniques and enterprise technology strategies
Understanding of security best practices for external-facing systems
We offer
Career plan and real growth opportunities
Unlimited access to LinkedIn learning solutions
Constant training, mentoring, online corporate courses, eLearning and more
English classes with a certified teacher
Support for employee’s initiatives (Algorithms club, toastmasters, agile club and more)
Enjoyable working environment (Gaming room, napping area, amenities, events, sport teams and more)
Flexible work schedule and dress code
Collaborate in a multicultural environment and share best practices from around the globe
Hired directly by EPAM \& 100% under payroll
Law benefits (IMSS, INFONAVIT, 25% vacation bonus)
Major medical expenses insurance: Life, Major medical expenses with dental \& visual coverage (for the employee and direct family members)
13 % employee savings fund, capped to the law limit
Grocery coupons
30 days December bonus
Employee Stock Purchase Plan
12 vacations days
Official Mexican holidays, plus 5 extra holidays (Maundry Thursday and Friday, November 2nd, December 24th \& 31st)
Monthly non-taxable amount for the electricity and internet bills
EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.
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