Python Developer

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

Join our small agile team in Bratislava working on a project for a Swiss customer with focus on the financial and investment area. You will be developing and taking care of services that calculate key metrics for structured products on the Swiss derivative market.

About the position


Are you ready to experience…?

  • doing numerical analysis and Monte Carlo simulations in Numpy
  • tech stack that includes Numpy, Numba, Pandas, Pytest, Plotly, Flask, FastAPI, Celery, Docker, PostgreSQL, MS-SQL, git
  • transforming finance prototypes into maintainable code
  • doing performance optimization
  • participation on process improvements and technology decisions
  • communicating with finance experts and turning their requirements into code
  • test automation
  • doing code reviews
  • revisiting of development process to fix bugs & keeping the code clean/maintainable for future

Project Benefits:

  • enough space to learn new technologies and develop your skills
  • no time pressure


What we are looking for:

  • strong knowledge of Python 3
  • ability to write clean and readable code
  • good understanding of OOP principles
  • experience with Git and version control
  • good communication skills in English

    Nice to have:

  • broad overview of Python ecosystem
  • very good understanding of Python performance
  • ability to write and understand basic SQL queries
  • experience with Numpy and/or Pandas
  • financial or math background
  • experience with Node.js


  • Opportunity for self-improvement and career growth
  • Internal & external software development education and trainings (certifications) covered by ERNI
  • Interesting projects based on the newest technologies
  • Flexible working time
  • 5 weeks of vacation
  • 3 sick days
  • Language courses (English, German), fully covered by ERNI
  • Personal budget
  • Referral & relocation bonus
  • Financial contribution for meals, fully covered by ERNI
  • New office (Einpark Bratislava)
  • Occasional business trips to Switzerland
  • Team buildings (grill parties, Christmas dinner, Hack&Hike, ERNI Performance  Days – two day education & leisure event, sport events, company breakfast etc.)
  • Well-established community: Meet-ups, Brown-bag Sessions, Running club, Climbing club, Board games club, etc.

About the recruiter

Kučečková 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 19 offices in 8 countries and continues to grow. Interested?

Sounds interesting?
Apply now!