Lead Python Developer (Fintech)

EPAM Systems; United States; Remote; USD 140,000 - 210,000; Full time

Job summary

EPAM Systems Inc in the United States seeks a Lead Python Developer (Fintech) to design and optimize data processing workflows, manage deployment pipelines, and lead large-scale trading data projects. You will collaborate on Git workflows, CI/CD tasks, and ensure reliable data reconciliation across sources.

The role requires 7+ years of Python experience, strong Pandas/NumPy, SQL expertise, and excellent English communication at B2+ level. Hybrid or on-site work is expected.

Qualifications

• 7+ years of Python development experience.
• Strong command of Python, Pandas and NumPy.
• Experience managing packages and virtual environments (Conda, Poetry, Virtualenvs).
• Expertise in crafting and refining SQL queries.
• Experience handling large, unstructured datasets such as loan-level tapes and model outputs.
• Ability to reconcile two data result sets and explain discrepancies.
• Hands-on experience with Git, including branching and PR reviews.
• English proficiency at B2+ level or higher.

Responsibilities

• Build data processing workflows using Python and manage virtual environments.
• Craft and optimize SQL queries for trading datasets.
• Collaborate through Git workflows: branching, PRs, code reviews.
• Contribute to CI/CD tasks: builds, tests, deployments, rollbacks.
• Analyze large datasets including loan-level tapes and model outputs.
• Cross-check results from multiple sources and investigate discrepancies.
• Document variances identified during data reconciliation.

Skills

Python

Pandas

NumPy

Conda

Poetry

Virtualenvs

SQL

Git

CI/CD

Data reconciliation

English (B2+)

Tools

SQL Server

Linux CLI

SSH

SMB/NFS

Job description

We're looking to add a Lead Python Developer (Fintech) to our team—someone with solid technical expertise in building applications and managing deployment pipelines, particularly for large-scale systems and trading databases. Please note that work hours extend to 8–9 PM.

Responsibilities

• Build data processing workflows leveraging Python while managing virtual environments
• Craft and fine-tune SQL queries designed for trading databases
• Work collaboratively through Git, covering branching, Pull Request creation, and code review processes
• Engage in CI/CD pipeline tasks, encompassing builds, testing, deployments, and rollbacks as necessary
• Examine large and intricate datasets, including loan-level tapes and model outputs
• Cross-check results originating from multiple sources and probe into any discrepancies found
• Document and clarify variances identified throughout data reconciliation work

Requirements

• A minimum of 7 years working as a Python Developer
• Strong command of Python, Pandas, and NumPy
• Adaptability in using conda, poetry, and uv for managing packages and virtual environments
• Expertise in crafting and refining SQL queries
• Experience handling large, unstructured datasets such as loan-level tapes and model outputs
• Ability to reconcile two sets of results and articulate the reasoning behind differences
• Hands‑on experience with Git, including branching, Pull Requests, and code review practices
• English proficiency at a B2+ level or higher

Nice to have

• Familiarity with SQL Server/T‑SQL
• Comfort working with Linux command line, SSH, and hybrid Windows/Linux file shares (SMB/NFS)
• Knowledge of how CI/CD pipelines operate, including builds, testing, deployment, and rollback procedures

Foundational understanding of fixed income concepts

• price/yield relationships, duration and convexity, spread types (OAS, Z spread), the distinction between coupon and yield, and accrued interest