Senior Python Engineer

We are looking for a Senior Python/Django Engineer with proven experience in framework upgrades and legacy code modernization.

You need to be comfortable working in large monolithic systems, resolving dependency conflicts, building regression safety nets, and refactoring integrations without disrupting production stability.

Our client is an American technology company that develops software for managing field sales operations. Its main product is a SaaS platform designed to help companies manage sales teams, track leads, plan sales territories, and monitor deal progress in real time. The platform combines tools for lead generation, team management, performance analytics, and contract management within a single digital environment. Today, it is used by tens of thousands of sales professionals to improve the efficiency of field sales and optimize the entire sales cycle—from the first customer contact to closing the deal.

Requirements:

Core Engineering Foundation:

• Strong Python 3.x
• PostgreSQL fundamentals (PostGis experience is recommended)
• Experience with Django: apps, models, middleware, signals, DRF (viewsets, serializers, permissions, Django ORM)
• Experience with Celery
• Strong API integration testing skills 
• Docker

Framework & Dependency Upgrade Competency:

• Experience upgrading Django across versions
• Dependency conflict resolution (pip, pip-compile)
• Reading deprecations & changelogs
• Debugging breaking changes
• Understanding Celery / Redis upgrade impact

Large Codebase Handling:

• Experience in large monoliths
• Comfortable navigating complex cross-app dependencies
• Can trace side-effects and signal chains
• Works safely inside legacy code

Testing & Safety Net Engineering:

• Experience writing backend tests (pytest / Django TestCase)
• Familiar with factories
• Understands smoke vs regression testing
• Can design for effective coverage

Integration & SDK Work:

• Experience with at least some of: Stripe / payment flows, Twilio, Google APIs

Responsibilities:

• Modernize the backend platform and upgrade the technology stack (Python and Django)
• Perform framework upgrades and dependency modernization with minimal risk to the production environment
• Analyze and adapt existing code to ensure compatibility with newer versions of libraries and frameworks
• Resolve dependency conflicts and compatibility issues with third-party packages
• Update and stabilize third-party integrations (such as Stripe, Twilio, Google APIs, etc.)
• Work with a large monolithic codebase, analyzing dependencies between modules and services
• Refactor complex parts of the system, including legacy modules
• Develop and maintain backend testing (smoke tests, regression tests)
• Participate in code reviews, technical planning, and architectural discussions
• Collaborate with QA and DevOps teams to ensure stable and reliable releases