Back End Engineer

Summary

Join Arena, a fast-growing Silicon Valley AI startup, and make a significant impact on our high-performance, scalable app and API. Collaborate with experienced engineers to build and optimize AI-powered features, tackling real-time messaging for hundreds of thousands of concurrent users and designing AI agents and RAG pipelines. We offer a challenging environment with opportunities to work on cutting-edge AI applications serving millions of users. The ideal candidate will have extensive backend development experience, proficiency in specific technologies, and a passion for solving complex problems. We provide competitive compensation, benefits, and a supportive work-life balance.

Requirements

• 3+ years as a backend developer
• Experience with high-traffic and high-performance applications
• Experience with TypeScript
• Experience with Node.js
• Experience with TDD, BDD, or ATDD
• Experience with REST APIs
• Experience with MongoDB, AWS DocumentDB, or other document database
• Curious developer who experiments with AI and AI agents everyday

Responsibilities

• Make 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
• Build a real-time chat that can scale to 1M simultaneous users
• Design, optimize and scale AI agent-based architectures, RAG pipelines, and other LLM-driven systems
• Integrate systems with data sources and handle millions of first-party data
• Build complex business rules orchestrations similar to Reddit, Discord, and Whatsapp

Preferred Qualifications

• Experience with statically typed languages (e.g. Java, C#, Go)
• Object-oriented and functional programming
• Experience with Golang
• Experience with AWS
• Experience with SQL
• Experience with React

Benefits

• Competitive salary package & benefits
• 4 weeks of paid time-off
• Learning and Development budget