Senior Frontend Developer

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

Resumo da oferta

A tech company in Contagem, Brazil, is seeking a Senior Frontend Engineer with over 8 years of experience in building high-availability systems. The ideal candidate will have strong proficiency in JavaScript and React, along with a solid understanding of modern development workflows and tools. This role emphasizes collaboration with backend teams and requires excellent communication skills, particularly in English. Familiarity with AI coding systems will be advantageous.

Qualificações

• 8+ years of frontend engineering experience on high-availability, scalable systems.
• Strong foundations in JavaScript (Vanilla JS, OOP, clean code, design patterns).
• Deep React experience using modern state / data patterns.

Conhecimentos

Fluent English communication

Frontend engineering experience

JavaScript fundamentals

React experience

HTML5 / CSS3 skills

Understanding of the JavaScript ecosystem

Testing discipline

REST APIs consumption

Git proficiency

Experience with AI coding systems

Formação académica

BSc / MSc in Computer Science or equivalent

Ferramentas

Node.js

Jest

React Testing Library

Playwright

Cypress

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.