Senior React Software Engineer

Senior React Software Engineer

Lineate is a US-based international software development company with over two decades of experience. From Intelligent Document Processing (IDP) and Agentic RAG systems to scalable cloud architectures, we turn complex ideas into real, measurable results. We deliver AI-driven custom solutions for FinTech, HealthTech, AdTech, and beyond, empowering businesses to grow smarter, faster, and more efficiently. Our expertise falls into three main categories:

• Building Custom AI Solutions: Deploying high-impact, AI-enabled technology utilizing IDP, Agentic RAG.
• Cloud and Data Infrastructure: Optimizing business operations with our data management and cloud computing solutions.
• Team Augmentation: Providing specialized experts in FinTech, AdTech, and HealthTech to integrate seamlessly and accelerate project timelines.
• Our goal is not just to build technology, but to build the future operating model for our clients.

Domain: FinTech

Location: Poland. The role offers remote work opportunities; however, candidates must be permanently based in Poland.

Requirements

• 6+ years of commercial software development experience
• Strong experience with React and modern JavaScript/TypeScript
• Deep understanding of frontend architecture and component-based design
• Experience working in microservices architecture environments
• Strong understanding of API integrations and communication between distributed services
• Experience with state management libraries (Redux, Zustand, Context API, etc.)
• Strong knowledge of HTML5, CSS3, responsive design, and cross-browser compatibility
• Experience working with REST APIs and asynchronous data handling
• Understanding of performance optimization and frontend security best practices
• Experience with testing frameworks (Jest, React Testing Library, Cypress, etc.)
• Familiarity with modern development tools and workflows (Git, CI/CD, Webpack/Vite)
• Ability to work independently and take ownership of features and solutions
• Good communication skills and ability to work in an international environment
• English — Upper-Intermediate or higher

Nice to Have

• Experience in fintech products or financial domain projects
• Experience with Next.js
• Familiarity with cloud environments (AWS, GCP, Azure)
• Understanding of microfrontend architecture
• Experience working in international product companies
• Understanding of UI/UX principles

We offer

• B2B contract with Lineate US office

Lineate is proud to be an Equal Opportunity Employer - We do not hire on the basis of race, color, religion, creed, gender, national origin, citizenship, age, disability, veteran status, marital status, pregnancy, parental status, sex, gender expression or identity, sexual orientation, or any other basis protected by Georgian legislation. All employment is decided based on qualifications, merit, and business need.