Frontend React Developer

Job Description

At Knowit, we create a sustainable workplace based on Scandinavian organizational culture, contributing to the society with respect for the people, diversity, and environment. Our company is a space to foster your personal growth and skills development. We have an innovative approach to technology that will let you see it from a new perspective.

As a company, we value teamwork and cooperation. Together we realize bold technological projects that can change the world for the better.

Project

You will join a team working on innovative solutions in the online sport and gambling industry (sports betting, live video streaming). Your role will be to co-create and develop both web and mobile applications, enabling users to watch live sports broadcasts, place bets, and check the odds in real-time.

Key Responsibilities

• Develop and maintain the frontend of applications (React.js / React Native).

• Integrate with backend services and external APIs.

• Participate in designing new features (the project is continuously evolving).

• Implement unit tests and end-to-end tests (e.g., Jest, Cypress).

• Collaborate with the team (developers, QA, UX/UI, management) on code reviews, knowledge sharing, and problem-solving.

Ensure high code quality (code review, best practices, performance optimization).

Qualifications

• Commercial experience with React.js (minimum 2 years).

• Excellent knowledge of JavaScript and TypeScript.

• Familiarity with React Native (at least a basic understanding the project is hybrid, so mobile components may be needed).

• Ability to write unit tests (e.g., Jest, React Testing Library).

• Experience with end-to-end testing tools (Cypress or similar).

• Proficiency in version control (Git).

• Knowledge of REST APIs (integration and debugging).

• Familiarity with CI/CD processes (pipeline setup and configuration).

English language proficiency (both written and spoken) for international collaboration.

What we offer

• B2B business contract,

• Flexible hours - you can start your day between 7 and 10;
• possibility of working from offices in Lodz, Warsaw and Bydgoszcz, hybrid or remotely
• An organizational culture based on sharing knowledge and feedback;

• Opportunity to develop your competencies - language training, technical training, soft skills, subsidized certificates, participation in conferences on preferential terms;

• Opportunity to benefit on preferential terms from benefits such as Multisport card, medical care in LuxMed for you and your family, group insurance;

• Equipment necessary for cooperation.