Python Developer

Bratislava Professional - Senior min. 2 500€ - depends on skills and experience

You will be responsible for development of financial risk modelling system, structure products predictions and calculations, finantial derivative indexing.
Be part of international agile team of SW Engineers and Structure product modelling experts.

About the position


  • Performance optimization
  • Migrating the project to a newer version of Python
  • Transforming finance prototypes into maintainable code
  • Communication with finance experts, and transforming their requirements into code
  • Refactoring legacy code
  • Numerical analysis and simulations in Numpy / Pandas
  • Automation of testing, linting, code coverage
  • Main technologies / libraries: Numpy, Numba, Docker, Pytest, Matplotlib
  • Mentoring of python developers at ERNI and the customers site
  • Code reviews


Project Benefits:

  • Enough space to learn new technologies and leadership
  • No time pressure


  • Strong knowledge of Python 3
  • Broad overview of Python ecosystem
  • Very good understanding of Python performance
  • Understanding of clean code and SOLID principles
  • Quick understanding and getting into existing application structures and program logic
  • Knowledge of Numpy
  • Very good communication skills in English


Nice to have:

  • Knowledge of C++ (standard c++ 11)
  • Basic knowledge of derivative products in financial market
  • Any experiences with backend development using NODE JS
  • Any experiences with frontend development in Angular 2 or higher
  • Globally full stack web development experiences.
  • Basic Understanding of SQL queries
  • Experience with Pandas


• Interesting projects based on the newest technologies
• Opportunity for self-improvement and career growth
• Internal & external software development education and trainings (certifications) covered by ERNI
• Flexible working time & overtime compensation
• 5 weeks of vacation
• 3 sick days
• Language courses (en, de) fully covered by ERNI
• Sport & culture personal budget (including medical care, yoga in the office)
• Referral & relocation bonus
• Fully covered meal vouchers/Financial contribution for meals
• Newly renovated rooftop of the building for free time activities
• Team buildings (grill parties, Christmas dinner, Hack&Hike session, EPD – two day education & leisure event, sport events, company breakfast etc.)
• Well-established community: Inspire Lab, Developers Community Sessions, Brownback Sessions, Book , Cinema , Gaming Club

About the recruiter

Linková Petra (ERNI)

Email: [email protected]

Trust, Passion, Responsibility and Independence

About us

ERNI was founded in 1994 in Switzerland to develop innovative software for international companies and small to medium­sized enterprises. Today, the ERNI Group has more than 800 employees at 15 locations in 7 countries and continues to grow. Interested?

Sounds interesting?
Apply now!