Currency

Senior React Engineer

4 000 - 6 500 USDNet per month - B2B
JavaScript

Senior React Engineer

JavaScript

Krucza 16/22, Warszawa

Optiveum

Full-time
B2B
Senior
Hybrid
4 000 - 6 500 USD
Net per month - B2B

Tech stack

    English

    C1

    TypeScript

    advanced

    CSS 3

    advanced

    JavaScript

    advanced

    HTML

    regular

Job description

Software Engineer (React / React-AI)


  • Location: Warsaw (remote for now, hybrid soon)

  • Salary: up to 5 000 USD/ month

  • Contract type: B2B


Our client is a US-based technology company headquartered in New York City, delivering digital solutions and consulting services that transform businesses and drive value. With offices in multiple countries, the company is now investing in a new engineering centre in Warsaw, recognizing and valuing the technical expertise and strong work culture of software engineers in Poland.


Currently, our client is building a new team in Warsaw. For now, the work is fully remote, but within a few months, team members will be expected to work onsite in the Warsaw office 3 days a week.


about the role

As a Software Engineer (React / React-AI), you will be responsible for designing and developing responsive user interfaces for innovative web applications. You will collaborate closely with cross-functional teams to build high-quality, interactive products.


what you will do


  • Design and develop responsive user interfaces using React

  • Apply test-driven development (TDD) and maintain CI practices

  • Collaborate with project managers, analysts, and sales teams

  • Write clean, maintainable code in JavaScript/TypeScript

  • Work with modern frameworks such as React.js + Redux (Next.js is a plus)

  • Implement asynchronous and functional programming paradigms

  • Debug frontend issues and manage Git branches effectively


What we are looking for


  • 8+ years of experience in JavaScript and TypeScript development

  • Strong knowledge of design patterns, functional and OO programming

  • Solid experience with HTML5, CSS3, Git, and debugging tools

  • Familiarity with custom package creation and integration

  • Experience working in Agile development environments

  • Bachelor’s degree in Computer Science or related field

  • Excellent communication and organizational skills

  • Ability to deliver high-quality results under pressure

  • Proficiency in writing cross-browser compatible code


what is offered


  • Competitive salary (up to 6 500 USD/ month)

  • Option to work on a B2B contract

  • Flexible work arrangements

  • Great paid time off policy

  • Comprehensive benefits package

  • Opportunities for professional growth and development

  • Supportive, dynamic, and inclusive work environment


Tech stack

    English

    C1

    TypeScript

    advanced

    CSS 3

    advanced

    JavaScript

    advanced

    HTML

    regular

Office location

Published: 26.09.2025

About the company

Optiveum

Optiveum is a boutique consultancy founded in 2020 with over 20 years of experience by its founders. The company specializes in supporting businesses, particularly from IT and tech industries, in Poland and Central Europ...

Company profile

Senior React Engineer

4 000 - 6 500 USDNet per month - B2B
Summary of the offer

Senior React Engineer

Krucza 16/22, Warszawa

Optiveum

4 000 - 6 500 USDNet per month - B2B
By applying, I consent to the processing of my personal data for the purpose of conducting the recruitment process. Informujemy, że administratorem danych jest Optiveum sp. z o.o. z siedzibą w Lublinie ul. Tomasza Zana 43 (dalej jako "administrator")... MoreThis site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Senior React Engineer - Optiveum