Front end Engineer

Arena

Front end Engineer contributing to the performance of AI-powered applications for Arena.im. Collaborating with teams to design and build scalable and flexible solutions.

Posted 5/22/2026full-timeRemote • 🇧🇷 BrazilMid-LevelSeniorWebsite

Tech Stack

Tools & technologies

FirebaseGraphQLJavaScriptNext.jsNode.jsReactTypeScriptWebpack

About the role

Key responsibilities & impact

As a front end engineer, you will have an enormous impact on making our app and API service faster, more scalable and more flexible.
Collaborate with product and engineering teams to ship AI-powered features and make the existing ones perform orders of magnitude faster.
Real-time messaging to support 500,000 concurrent users per customer application.
Design and build AI applications, including Agents and model fine-tuning.
Building for Performance - Delivering ultra-fast web applications optimized for performance.
Complex Debugging - Investigating tricky issues and crafting robust solutions.
High availability: our code is running on homepages of the most visited websites and apps in the internet.

Requirements

What you’ll need

3+ years of relevant Frontend programming experience
TypeScript
React
Next.js
GraphQL
Git
WebSocket
Monorepo
Styled Components (Nice-to-Have)
Gitflow (Nice-to-Have)
Github Actions (Nice-to-Have)
Webpack (Nice-to-Have)
Turborepo (Nice-to-Have)
Google Firebase/Firestore (Nice-to-Have)
Node.js (Nice-to-Have)

Benefits

Comp & perks

🔥 Be a part of the team in Silicon Valley and join a global team
💪 A team of exceptional engineers leading the cutting-edge AI Agents.
💶 Competitive salary package & benefits
⛱️ 4 weeks of paid time-off
📖 Learning and Development budget
🚀 Key moment to join Arena in terms of growth and opportunities
💻 Ability to put your stamp on real-world AI applications that serve millions of users.
📚 Fast-learning environment, entrepreneurial and strong team spirit
🌍 Multiple nationalities: cosmopolite & multi-cultural mindset
💆‍♀️ Our people matter, work-life balance is important at Arena

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

TypeScriptReactNext.jsGraphQLWebSocketNode.jsMonorepoGitComplex DebuggingPerformance Optimization

Soft Skills

CollaborationProblem Solving