Senior Frontend Developer

Titan Clarity; Manaus; Presencial; BRL 150.000 - 200.000; Tempo integral

Resumo da oferta

A tech company based in Recife, Brazil is looking for a senior Frontend Engineer with over 8 years of experience in high-availability systems. The ideal candidate must possess strong skills in JavaScript and React, along with a solid understanding of modern web development practices including performance optimization and testing with TDD. Familiarity with agentic AI tools and comfortable working in collaborative environments is a plus. This role offers the opportunity to work on innovative projects and contribute to cutting-edge technologies.

Qualificações

• 8+ years of frontend engineering experience on high-availability, scalable systems.
• Deep React experience with modern state/data patterns.
• Strong testing discipline with TDD principles.

Conhecimentos

Fluent English communication

JavaScript

TypeScript

React

HTML5

CSS3

Node.js

Performance optimization

Git

AI coding tools

Formação académica

BSc/MSc in Computer Science or equivalent

Ferramentas

Jest

React Testing Library

Playwright

Webpack

Descrição da oferta de emprego

Requirements

• Fluent English communication, written and spoken.
• BSc/MSc in Computer Science or equivalent practical experience.
• 8+ years of frontend engineering experience on high-availability, scalable systems.
• Strong fundamentals in JavaScript (Vanilla JS, OOP, clean code, design patterns) and TypeScript (or proven ability to introduce TS incrementally in legacy codebases).
• Deep React experience using modern state/data patterns (Redux Toolkit, React Query/SWR, Zustand, Context), with the ability to work within existing Redux/Redux‑Saga setups.
• Excellent HTML5/CSS3 skills (Flexbox, Grid), responsive/mobile-first design, and CSS preprocessors (SASS/LESS).
• Solid understanding of the JavaScript ecosystem (Node.js, Babel) and modern build tooling (Vite/Webpack; npm/yarn/pnpm).
• Strong testing discipline with Jest, React Testing Library, and Playwright or Cypress; understands TDD principles.
• Proven experience with performance profiling and optimization (bundle size, rendering, Web Vitals, memory leaks).
• Strong experience consuming REST APIs and collaborating with backend teams.
• Comfortable with Git and modern delivery workflows (PRs, code reviews, CI/CD).
• Hands‑on experience using agentic AI coding systems for multi‑step engineering tasks.
• Strong grasp of core agentic AI foundations, including: AI coding tools (e.g. Claude Code, Copilot, Gemini CLI, ChatGPT Codex), Context & memory management, Commands, sub‑agents, and MCP servers, Structured outputs (JSON schemas), Function/tool‑calling best practices (e.g. CLI tool usage).

Nice to have

• Experience with monorepos (Nx, Turborepo).
• Frontend observability (Sentry, Datadog RUM, OpenTelemetry).
• Knowledge of Next.js, UI frameworks (Chakra UI).
• Familiarity with GraphQL and large‑scale data systems (RDBMS/NoSQL).
• Experience with real‑time technologies (WebSockets, WebRTC).
• Service Workers, streaming technologies, and advanced caching.
• Advanced agentic AI patterns, such as hooks, RAG, cost optimization, self‑checking/critique loops, tool mocking for tests, and A/B testing prompts or agents.