React Developer - Cutting-Edge AI Platform

JavaScript

-, Kraków

Caspian One

2 000PLN

Net per day - B2B

Full-time

B2B

Senior

Hybrid

Tech stack

TypeScript

advanced

CSS3

advanced

HTML5

advanced

React

advanced

UI

advanced

Less

regular

Agile

regular

RESTful API

regular

Redux

nice to have

JavaScript

nice to have

Job description

React Developer - Cutting-Edge AI Platform

(Hybrid, 3 days week in office - Krakow)

Up to 2000 PLN a day

A first-class global organisation is assembling a high-performing team of React Developers to join an ambitious AI programme that’s redefining how domain-specific prompt engineering platforms are built. These B2B contracts, offer an opportunity with a forward-thinking tech initiative, offering the chance to work on a dual-platform architecture, from structure to intelligent workflows.

We’re looking for developers across a range of experience levels, from mid to senior, to foster a collaborative and balanced team dynamic. You will be a seasoned React Developer with deep expertise in React and modern JavaScript frameworks. You thrive in fast-paced environments where performance and reliability are critical. You have experience with real-time systems and understand the unique challenges of building within financial institutions and their applications.

Tech Stack & Requirements

• 5+ years of experience in React (v17+) and TypeScript

• Strong command of JavaScript (ES6+) and HTML5

• Solid experience with UI testing frameworks (e.g., React Testing Library, Cypress)

• Proficiency in CSS3/Less – not afraid to get hands-on with styling

• Clean, maintainable coding practices and strong problem-solving skills

• Experience working with RESTful APIs

• Familiarity with Agile methodologies (Scrum, XP, Kanban)

• Excellent communication skills – especially in collaborating with backend teams

Nice to Have:

• Experience with Redux

• Background in responsive design

• Exposure to Node.js for backend integration

Why Join this growing division?

• Be a key part of a visionary AI programme with real-world impact

• Work on a modular, scalable platform architecture

• International collaboration with leaders of their field, build with fellow expert engineers and AI specialists

• Competitive daily rate up to 2,000 PLN

• Long-term contract security with 2+ years of work already confirmed

• Opportunity to work on cutting-edge financial technology

Published: 09.08.2025

Meet the company

Caspian One

Caspian One is a financial technology services partner, delivering high-impact opportunities within global banks, hedge funds, and fintechs. We specialise in strategic skillset acquisition across Java, C#, QA/Testing, DevOps, Data Engineering, Front End (UI/UX), and Project Delivery (BA, PM, Scrum Master). From modernisation programmes to greenfield builds, we align expert resources with mission-critical priorities - enabling you to grow your expertise within fast-paced, business-driven environments.

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