Senior Python Engineer

Salary : 1000-1400 PLN netto / dzień (B2B)

Remote : r emotely (with optional access to an office in Warsaw / Gdynia / Rzeszów / Kraków)

Why choose this offer?

You’ll work on premium-quality web products used globally by energy market analysts

Close collaboration with UX, Backend, and Data Science teams – your input directly shapes the product

Modern tech stack : React 18, TypeScript, MUI, Vite, MapboxGL

Well-defined architecture and a mature product roadmap , no chaos

You’ll join a senior-level team – no mentoring of juniors required

Project

You’ll be developing the next generation of data-rich web applications for analysts working in global energy markets . These internal and external tools integrate high-frequency data , advanced charting , and mapping features. The goal is to provide fast , reliable , and user-friendly access to complex datasets – enabling smarter decisions in areas like trading , risk analysis , and pricing .

Expected competences and knowledge

3+ years of hands-on experience with React.js and TypeScript

Strong command of JavaScript (ES6+) , HTML , and CSS

Experience with state management (Redux, Context API) and component-based design

Previous work with RESTful APIs and large data sets

Familiarity with data visualization libraries such as Highcharts or Plotly.js

Experience working with design systems (e.g. Material UI)

Bonus : experience with Python , GraphQL , CI / CD tools (GitHub Actions, Vercel), Vite , Playwright , MapboxGL

Strong communication skills and fluency in English (B2+)

Technologies you'll work with

React 18

TypeScript

Material UI (MUI)

Vite

Highcharts , Plotly.js (for data visualization)

MapboxGL (for interactive maps)

REST APIs

Git , GitHub Actions

CI / CD (e.g. Vercel, CircleCI)

Playwright (for end-to-end testing)

Python (optional, for collaboration with backend teams)

Client – why choose this particular client from the Jit portfolio?

Our Client, an established and rapidly growing research-based consulting firm in the energy sector , is seeking skilled IT professionals to support their ambitious expansion plans. With a strong reputation for providing industry-leading short-, medium-, and long-term analyses and forecasts of energy markets , they enable their customers to make informed decisions on trading, investing, financing, and planning. Their recent acquisition of a macroeconomic research firm has further enhanced their offerings in global financial markets and allowed them to better serve an increasing client base amid the accelerating energy transition and market uncertainties.

About Jit Team

The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 500 experienced experts . We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme.

Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity . By supporting indigenous initiatives, we ensure the circulation of good energy.