Senior Full Stack Engineer (KLI-90) Company: KitaLulus Responsibilities: Build and maintain complex multi-step applications and onboarding journeys, including validation, document uploads, resumable states, and KYC flows. Develop customer, dealer, and operations portals using TypeScript, React, and Next.js. Build backend use cases, APIs, database queries, and integrations; this is not a UI-only role. Integrate with CRM, workflow engines, compliance services, credit systems, and other external platforms. Ensure accurate data mapping and reliable end-to-end application flows. Develop and maintain E2E tests for critical customer journeys. Collaborate with engineering teams in Berlin and product/operations teams in Switzerland. Contribute to specification-driven and AI-assisted development. Requirements: 6+ years of full-stack engineering experience with TypeScript. Strong recent production experience with React and Next.js App Router. Mandatory: experience working with fintech or regulated financial products. Proven experience owning complex onboarding or application flows. Strong backend capabilities, including APIs, databases, business logic, and system integrations. Experience with state management and data-fetching tools such as Zustand or TanStack Query. Experience with React Hook Form/Formik and Zod is preferred. Experience with Playwright or Cypress for E2E testing. Experience building multi-language/internationalised applications. Professional English communication skills. Experience with KYC, AML, credit/identity verification, or workflow/BPM integration is a plus. Working days: Monday–Friday Working hours: 11:00–19:00 Recruiter requirements: All genders No age limit Minimum 6 years of experience Required skill: TypeScript

Senior Full Stack Engineer (KLI-90)

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