Senior Frontend Developer (React)

Warsaw (Onsite - near Metro Plac Wilsona) B2B

About Silk Software House

Silk Software House builds and maintains business-critical web applications for fintech, payments, and enterprise clients. We value ownership, strong technical judgment, and developers who can design solutions, not just implement tasks.

Your Role

As a Senior Frontend Developer, you'll take responsibility for frontend architecture, make key technical decisions, and ensure long-term code quality and performance. You'll collaborate closely with backend teams and help shape how frontend systems are built and evolved.

Responsibilities

• Design and build frontend architecture for web applications

• Develop complex React applications using TypeScript

• Make and justify architectural and technical decisions

• Optimize performance, rendering, and user experience

• Define and enforce frontend best practices and coding standards

• Integrate frontend systems with REST / GraphQL APIs

• Review code and support less experienced developers

• Collaborate with architects, backend developers, and product stakeholders

• Support existing projects through modernization and optimization

Requirements

• This role requires full-time onsite work (no remote or hybrid options). Candidates must be willing and able to work from our office near the Plac Wilsona metro station

• 5+ years of professional programming experience, including strong React experience

• Excellent knowledge of TypeScript

• Deep understanding of React, state management, and rendering behavior

• Very good knowledge of HTML5, CSS3, and responsive design

• Strong experience with TailwindCSS

• Solid understanding of authentication and authorization flows

• Good knowledge of frontend security and performance optimization

• Experience designing and building frontend architectures

• Experience diagnosing complex performance and rendering issues

• Familiarity with Git and professional development workflows

• Experience working in teams using Agile methodologies

• Ability to use AI-assisted development tools effectively

• English at B2+ level, enabling smooth communication

Nice to Have

• Next.js

• Accessibility standards (WCAG)

• E2E testing frameworks

• CI/CD pipelines

• Storybook

• i18n support in production applications

Rates (B2B)

• 110-140 PLN / hour

Recruitment Process

• Intro call (30 min)

• Senior-level technical interview

• Architecture & decision-making discussion

• Offer