Senior Frontend Developer

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

Resumo da oferta

A leading tech company in Brazil, Amapá is seeking an experienced Frontend Engineer with over 8 years of experience in building high-availability, scalable systems. The ideal candidate has strong skills in JavaScript and React, along with a deep understanding of modern testing methodologies. This position offers the opportunity to work with cutting-edge technologies, including agentic AI coding tools and modern build tooling. Join a dynamic team and make an impact in the tech landscape.

Qualificações

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

Conhecimentos

Fluent English communication

JavaScript

TypeScript

React

HTML5 / CSS3

Testing discipline

Git

Agentic AI coding systems

Formação académica

BSc / MSc in Computer Science or equivalent

Ferramentas

Node.js

Redux Toolkit

Jest

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.