Senior Python Developer for trading app

Zennbot; Remote; PLN 180,000 - 240,000; Part time

Job summary

A growing finance startup in Poland is seeking a Senior Python Developer to help design and build the backend of an automated trading app. This fully remote position offers great flexibility, allowing you to set your own hours and work part-time if desired. Candidates should have advanced Python skills and experience with NumPy, as well as a comfort with building backend systems and DevOps practices. This role involves ownership of feature development and collaboration with a small, dedicated team.

Benefits

Flexible schedule

Work with a small team

Ownership in product direction

Qualifications

• Experience in building and operating backend systems at scale.
• Comfortable with testing, documentation, and code quality practices including TDD.
• Some experience with MQL, Pinescript, or similar.

Responsibilities

• Design and build the backend of a trading app from scratch.
• Support building and running custom trading algorithms.
• Work with a small, focused team and have ownership over product direction.

Skills

Advanced Python experience

Strong experience with NumPy and pandas

Experience with DevOps and CI/CD pipelines

Ability to reason about concurrency and async code

Familiarity with trading and market concepts

Experience with Django, Celery, Postgres

Clear communication in English

Tools

Django

Git

GitHub

Job description

Senior Python Developer for trading app @ Zennbot
Warszawa
Warsaw, Masovian Voivodeship, Polska

Remote — B2B - 20k-30k PLN/month — Start ASAP

We're a bootstrapped B2C finance startup with 1000+ paying users and growing fast. We’re expanding our automated trading app to support building and running custom trading algorithms. We’re looking for a senior Python developer with a strong interest in trading and quantitative systems. You’ll work closely with the founder/CTO to design and build the new backend from scratch.

Offer

• ~43 USD/h — B2B Contract
• Fully remote, async-first
• Flexible schedule (set your own hours) - part-time possible
• Work with a small, focused team
• Tons of ownership and say in product direction

Sounds good?
Send over your portfolio or a project you're proud of!

• Advanced Python experience
• Shipped and operated backend systems at scale
• Strong experience with NumPy, pandas, and efficient data handling
• Comfortable with DevOps and building CI/CD pipelines
• Able to reason about concurrency, async code, and background processing
• Experience with python trading, backtesting and optimization libraries
• Familiar with trading and market concepts
• Some experience with MQL, Pinescript, TradingView or similar
• Experience with Django, Celery, Postgres, Elasticsearch is a plus
• Values testing, documentation, and code quality, practices TDD
• Very comfortable with the terminal, Git, and GitHub
• You want to set your own hours and have zero weekly meetings
• Communicate clearly in English