React Frontend Developer – Java/Python Backend Exposure

Hook – one bold sentence
Empower scalable UI innovation — shape the future of high-frequency trading platforms!

Location & Work Model
Warszawa-based opportunity with hybrid work model.

As a Senior Frontend Developer, you will be working for our client, a leader in systematic trading strategies within the financial industry.
You will contribute to building and optimizing critical trading infrastructure across derivatives, FX, commodities, rates, and single stocks, helping to drive performance and scalability in digital trading solutions. Join us and be at the forefront of innovation and growth in financial technology.

Your main responsibilities:

• Develop and optimize high-performance, scalable user interfaces using React JS (Hooks / Context API).
• Implement modern CSS techniques (CSS-in-JS / SCSS) to enhance user experiences.
• Collaborate with cross-functional teams to deliver seamless frontend solutions.
• Write robust unit tests with Jest and contribute to code quality standards.
• Contribute to modern frontend workflows, including npm, CI/CD pipelines (GitLab).
• Support backend integration using Java or Python (exposure welcome).
• Participate actively in UI design discussions to align with UX principles.
• Maintain and improve existing systems, ensuring low latency and high-volume trading efficiency.

You're ideal for this role if you have:

• Minimum 4 years of commercial frontend development experience.
• Strong proficiency in React JS, JavaScript, and modern CSS.
• Sound understanding of design patterns and best programming practices.
• Experience with Jest testing framework.
• Working knowledge of CI/CD processes and tools (GitLab).
• Basic backend knowledge in Java or Python is a plus.

It is a strong plus if you have: (optional)

• Experience with Ag-Grid library.
• Knowledge of good UX principles.
• Certifications or additional training in frontend technologies.

Language Required for the role:
Fluent English.

Eligibility for the role:
Only candidates with an existing legal right to work in the European Union will be considered for this role.

#MAKEYourCareerBETTER
Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.