Senior Frontend Developer (React)

📍 Warsaw (Onsite – near Metro Plac Wilsona)💼 B2BAbout Silk Software HouseSilk 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 RoleAs 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.ResponsibilitiesDesign and build frontend architecture for web applicationsDevelop complex React applications using TypeScriptMake and justify architectural and technical decisionsOptimize performance, rendering, and user experienceDefine and enforce frontend best practices and coding standardsIntegrate frontend systems with REST / GraphQL APIsReview code and support less experienced developersCollaborate with architects, backend developers, and product stakeholdersSupport existing projects through modernization and optimizationRequirementsThis 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 station5+ years of professional programming experience, including strong React experienceExcellent knowledge of TypeScriptDeep understanding of React, state management, and rendering behaviorVery good knowledge of HTML5, CSS3, and responsive designStrong experience with TailwindCSSSolid understanding of authentication and authorization flowsGood knowledge of frontend security and performance optimizationExperience designing and building frontend architecturesExperience diagnosing complex performance and rendering issuesFamiliarity with Git and professional development workflowsExperience working in teams using Agile methodologiesAbility to use AI-assisted development tools effectivelyEnglish at B2+ level, enabling smooth communicationNice to HaveNext.jsAccessibility standards (WCAG)E2E testing frameworksCI/CD pipelinesStorybooki18n support in production applicationsRates (B2B)110–140 PLN / hourRecruitment ProcessIntro call (30 min)Senior-level technical interviewArchitecture & decision-making discussionOffer