Frontend Engineer (React, Typescript)

B3 Consulting Poland; United States; Remote; USD 32,000 - 48,000; Full time

Benefits offered by this job

Health and sports benefits

Speed Coaching

Team sports activities

Job summary

B3 Consulting Poland is seeking a senior Frontend Engineer to tackle advanced frontend challenges. You will work with React and TypeScript on large datasets, implement complex transformations, and optimize performance.

You will build and maintain components using Atomic Design, manage state with Redux, integrate with REST APIs, and own frontend engineering from business logic through delivery. English required and ability to work in Poland.

Qualifications

• Advanced React and TypeScript in production code.
• Deep Redux knowledge and react-redux hooks.
• Client-side business logic with large data volumes.
• Atomic Design and MVC for modular UI.
• SOLID principles, testing, and code reviews.
• English level B2+ is required.

Responsibilities

• Develop advanced frontend features with large data transformations.
• Build and maintain React components following Atomic Design.
• Manage state with Redux and integrate REST APIs.
• Ensure performance, accessibility, and code quality.
• Collaborate with backend and QA across borders.

Skills

React

TypeScript

Redux

REST APIs

Atomic Design

MVC pattern

Performance optimization

Unit testing

Git

English B2+

Job description

What you work on today shapes where you'll be tomorrow.

Looking for your next challenge as a Frontend Engineer? We may have the right opportunity for you.

At B3, we start with people and their experience. We match projects to your skills and professional growth path. Our consultants work across a wide range of industries and technologies, delivering IT projects both in Poland and internationally. This allows you to build your career in a deliberate way - not by chance.

We are part of an international organization listed on Nasdaq Stockholm, operating in 11 countries. In Poland, we operate with full autonomy. We choose our technologies, processes, and ways of working while maintaining the highest professional standards.

Join us today.

What we offer

• Work in a Scandinavian culture built on logic, trust, and open dialogue.




• Health and sports benefits tailored to your needs.




• Speed Coaching - short sessions designed to provide new perspectives and solutions.




• Sports training, an internal team, and opportunities to take part in competitions.

Key areas of the job:

• Advanced business logic on the frontend side - working with large data volumes, complex transformations, algorithmic operations and performance optimization; this is not a CRUD application - algorithmic correctness is a daily challenge




• Building and maintaining React components following the Atomic Design methodology, state management with Redux, integration with REST APIs and external desktop tools




• Ownership of software engineering - development is done after the business logic is recognized and mapped

What you need to join us:

Must have:

• React (advanced level) and TypeScript (advanced level) - hooks, Context API, performance optimization, typing of components, hooks, Redux actions and reducers, generic types




• Redux - deep understanding of the architecture and three core principles, react-redux integration via hooks (useSelector, useDispatch), state immutability, selector-based optimization




• Complex business logic implementation on the client side - asynchronous operations, REST API integration, architectural thinking about data flow, algorithmic performance with large datasets




• Atomic Design and MVC pattern - designing scalable and modular component structures, separation of logic from the view layer




• Engineering best practices - SOLID, unit/integration tests (mandatory code coverage), code reviews, Git, ownership of full epics and understanding business goals behind features




• English B2+




• Ability to perform work in Poland (citizenship, residence permit, visa, etc.)

Nice to have:

• Background extending beyond pure frontend (e.g., backend or systems-level programming experience)




• Experience or natural inclination for manual testing - finding edge cases and breaking applications (the team shares QA responsibilities)




• Experience with end-to-end testing frameworks




• Familiarity with embedding frontend UI as a panel within a desktop application