1,179

Javascript jobs in Brazil

Senior Frontend Developer

Titan Clarity

Contagem
On-site
BRL 120,000 - 160,000
7 days ago
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Desenvolvedor WEB – Front End

Hostche

Pelotas
On-site
BRL 120,000 - 160,000
3 days ago
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Desenvolvedor(a) Swift

WATCH TV ENTRETENIMENTOS

Curitiba
On-site
BRL 120,000 - 160,000
3 days ago
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TypeScript Tech Lead | Remote Work | Recife, Brazil

BairesDev

Recife
Remote
BRL 80,000 - 120,000
3 days ago
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Data Engineer

Dexian Brasil

Manaus
Remote
BRL 80,000 - 120,000
3 days ago
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Desenvolvedor(a) Full Stack (Pleno)

Rehva Tech

São Paulo
Hybrid
BRL 80,000 - 120,000
3 days ago
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ENGENHARIA DE SOFTWARE SÊNIOR

Digisystem

Brasília
On-site
BRL 80,000 - 120,000
3 days ago
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Software Engineering Manager

Coda Search│Staffing

Manaus
On-site
BRL 200,000 - 250,000
3 days ago
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Developer (Pl)

HST Card Technology

Presidente Prudente
Remote
BRL 80,000 - 120,000
3 days ago
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Engenheiro de Software Full Stack SR

Juntos Somos Mais

Jaboatão dos Guararapes
On-site
BRL 120,000 - 160,000
3 days ago
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10659583 | Analista de Desenvolvimento Front End SR

Almaviva Solutions

São Paulo
Hybrid
BRL 80,000 - 120,000
3 days ago
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ARQUITETO DE APLICAÇÕES MOBILE

G4F

Olinda
Remote
BRL 80,000 - 120,000
3 days ago
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Banco de Talentos PCD | Tecnologia

Liferay, Inc.

Recife
On-site
BRL 80,000 - 120,000
3 days ago
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Data Engineer

Dexian Brasil

Presidente Prudente
Remote
BRL 80,000 - 120,000
3 days ago
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DEV PHP-Senior

Insightful Consulting

Macapá
Remote
BRL 80,000 - 120,000
3 days ago
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Senior AI Engineer - US SaaS startup | Remote

Atomic HR

Goiânia
Remote
BRL 160,000 - 200,000
4 days ago
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Desenvolvedor Full Stack PL

Certisign

São Paulo
On-site
BRL 80,000 - 120,000
4 days ago
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Analista Desenvolvedor SR – ServiceNow

Stefanini Group

Taboão da Serra
On-site
BRL 80,000 - 120,000
4 days ago
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Desenvolvedor(a) Salesforce Pleno

Framework Digital

Eusébio
Hybrid
BRL 80,000 - 120,000
4 days ago
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Desenvolvedor/desenvolvedora Servicenow Para Pernambuco

Capgemini

Pernambuco
Hybrid
BRL 80,000 - 120,000
4 days ago
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Desenvolvedor FullStack JAVA/Angular SR

Minsait an Indra Company

São Paulo
On-site
BRL 80,000 - 120,000
4 days ago
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Desenvolvedor Full Stack IA Sênior - Remoto

Relevo - Carreiras

Brazil
Remote
BRL 80,000 - 120,000
4 days ago
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Analista de Qualidade Sr – Grupo Stefanini – Home Office

Grupo Stefanini

Rio de Janeiro
Remote
BRL 80,000 - 120,000
4 days ago
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Analista de Testes – Pleno

CRP Tech

São Paulo
Hybrid
BRL 80,000 - 120,000
4 days ago
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Desenvolvedor de Oracle

CAST

Aquiraz
Remote
BRL 80,000 - 120,000
4 days ago
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Senior Frontend Developer
Titan Clarity
Contagem
On-site
BRL 120,000 - 160,000
Full time
7 days ago
Be an early applicant

Job summary

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.

Qualifications

  • 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.

Skills

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

Education

BSc / MSc in Computer Science or equivalent

Tools

Node.js
Jest
React Testing Library
Playwright
Cypress
Job description
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.

* The salary benchmark is based on the target salaries of market leaders in their relevant sectors. It is intended to serve as a guide to help Premium Members assess open positions and to help in salary negotiations. The salary benchmark is not provided directly by the company, which could be significantly higher or lower.