Senior React Frontend Engineer for Banking Platform

Ailleron; Kraków; Hybrid; PLN 240,000 - 300,000; Full time

Benefits offered by this job

Atmosphere: Great Place To Work

Health Care and Sports Card

Language classes during work hours

Life insurance

Well-being programs and team events

Job summary

Ailleron is seeking a Senior Frontend Developer to join our team working on an online banking platform for a business client. You will contribute to application development with the latest technologies, implement new features, and enhance existing functionality for banking software.

We value strong React 18 proficiency, TypeScript, testing practices, and collaborative workflows. The role involves maintaining an existing codebase and working in a team with modern CI/CD processes.

Qualifications

• Strong knowledge of React 18 and its core concepts, including hooks, context, component lifecycle, and design patterns.
• Experience with React Hook Form for forms.
• Hands-on experience with React Query v5 for async data handling.
• Ability to debug and optimize using DevTools.
• Proficiency with TypeScript in large-scale projects.
• Good Git skills and collaborative workflows (PRs, code reviews).
• Experience with npm and Yarn as package managers.
• Ability to write unit and integration tests (Jest + React Testing Library).
• Experience maintaining and extending existing codebases.
• Theoretical knowledge of monorepos and Nx; practical is a plus.
• Experience with CI/CD and automation.

Responsibilities

• Actively contribute to application development using the latest technologies.
• Implement new features and enhance existing functionality.
• Develop modern banking systems used by large financial institutions.

Skills

React 18 (hooks, lifecycle)

React Hook Form

React Query v5

TypeScript

Git

npm & Yarn

Jest & RTL

Monorepos & Nx

CI/CD tooling

Debugging with DevTools

Performance optimization

End-to-end testing basics

Tools

React

Jest

React Testing Library

Nx

CI/CD tools

Monorepos

Job description

Ailleron is seeking a Senior Frontend Developer to join our team working on an online banking platform for a business client. You will contribute to application development with the latest technologies, implement new features, and enhance existing functionality for banking software.

We value strong React 18 proficiency, TypeScript, testing practices, and collaborative workflows. The role involves maintaining an existing codebase and working in a team with modern CI/CD processes.