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Senior Frontend Engineer (Next.js & Security RBAC) at DaCodes. ¡Work at DaCodes!. We are a firm of software and digital transformation experts delivering high-impact solutions.. For 10 years we have created technology and innovation-driven products thanks to our team of 220+ talented #DaCoders, including developers, architects, UX/UI designers, PMs, QA testers and more. Our team collaborates on projects with clients across LATAM and the United States, achieving outstanding results.. At DaCodes, you will have the opportunity to boost your professional growth, work on diverse projects across industries, and contribute to the design, implementation, and optimization of cloud infrastructures.. Our DaCoders make a real impact on the success of our business and our clients. You will be the expert driving our projects while working with disruptive startups and global brands.. Are you interested?. Technical Requirements. Must Have. . . Next.js 14. + . TypeScript. + . React 18. . . Experience with . complex RBAC systems. , including: . . . Multi-layered security (. UI → Middleware → API → Database. ) . . Role hierarchy and multi-tenant data isolation . . Centralized permission management . . . . Solid . PostgreSQL literacy. (schema comprehension, query optimization) . . Testing experience with . Vitest + Playwright. . . Proven use of . Claude Code. as the primary development tool . . Our Stack. . . Frontend. : Next.js, React 18, TypeScript, Tailwind CSS, Radix UI . . . Auth & State. : NextAuth.js, React Query, React Table, React Hook Form + Zod . . . Database. : PostgreSQL (shared across 4 applications) . . . Architecture. : SecureQueryBuilder with role-based query filtering, middleware route protection, centralized navigation . . . Testing. : Vitest + Playwright . . . Tooling. : Comprehensive package.json with 27+ scripts . . Ideal Candidate. . 3–5+ years of experience building production-grade . React/Next.js. applications . . Strong . TypeScript. and . security-first mindset. . . Hands-on experience with . RBAC and multi-tenant systems. . . Comfortable navigating and understanding large, existing codebases . . Proactive, self-directed, and collaborative in a remote-first setting . . . Claude Code proficiency (required). . . Main Responsibilities. . Take ownership of a sophisticated . Next.js dashboard. , maintaining and extending its features. . . . Debug and troubleshoot access control. issues in a highly granular RBAC system. . . . Build and optimize interfaces. leveraging our Tailwind + Radix design system. . . Integrate with . PostgreSQL. (read schemas, optimize queries, no new schema design). . . Ensure . code quality. with a robust testing suite (Vitest + Playwright). . . Collaborate with product and technical leadership while working independently. . . Company Location: Argentina.