Senior Frontend Developer

Titan Clarity; Belém; Presencial; BRL 120.000 - 160.000; Tempo integral

Resumo da oferta

A technology company in Brazil is looking for a seasoned Frontend Engineer with over 8 years of experience to build high-availability systems. The ideal candidate will have strong skills in JavaScript and React, alongside a deep understanding of responsive design and modern build tools. Familiarity with AI coding tools is a plus. This role provides an opportunity to work collaboratively with backend teams and advance your expertise in cutting-edge technologies.

Qualificações

• 8+ years of frontend engineering experience on high-availability, scalable systems.
• Deep React experience using modern state/data patterns.
• Strong experience consuming REST APIs and collaborating with backend teams.

Conhecimentos

Fluent English communication

Frontend engineering

JavaScript

TypeScript

React

HTML5

CSS3

Node.js

Testing discipline

REST APIs

Git

AI coding tools

Formação académica

BSc / MSc in Computer Science or equivalent

Ferramentas

Jest

Webpack

SASS

Redux

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.