Base Salary
$140k - $210k/yr
Responsibilities
- Overhaul the email and calendar sync engine for improved performance and reliability.
- Expand voice agent capabilities for live conversations.
- Develop solutions for inbound call handling and routing.
- Build native scheduling features within the Close platform.
- Design systems for human orchestration of agentic workflows.
- Enhance connect and answer rates through telephony improvements.
- Advance the streaming and event infrastructure using technologies like Kafka and Redis.
Requirements
- Proven experience as a backend engineer with proficiency in Python and familiarity with Go, Rust, or TypeScript.
- Deep knowledge of email and calendar platforms, including IMAP and sync protocols.
- Experience with real-time and async distributed systems such as WebRTC and WebSockets.
- Familiarity with AI applications in real-time workflows, including live transcription and voice agents.
- Ability to navigate complex telephony systems and edge cases.
- Experience using AI tools to enhance coding and workflow efficiency.
Tech Stack
About Close
Close is the sales CRM built for founders, startups, and small businesses that want to grow faster. We help teams find, communicate with, and convert more customers without the complexity of traditional CRM software. Unlike CRMs that simply store customer data, Close brings calling, email, SMS, automation, and AI together in a single platform designed to help sales teams take action. Trusted by more than 11,500 businesses worldwide, Close powers billions of sales interactions every year. Teams use Close to manage leads, streamline follow-up, improve productivity, and drive predictable revenue growth. Our newest product, Chloe, extends that mission even further. Built directly into Close, Chloe is an AI sales teammate that helps businesses respond faster, follow up more consistently, and engage more leads without adding headcount. Whether contacting a new inbound lead in seconds or re-engaging opportunities that have gone cold, Chloe helps small teams operate like much larger sales organizations. From founder-led sales to growing revenue teams, Close gives businesses everything they need to manage customer relationships, communicate with prospects, and drive revenue from a single platform. Learn more at Close.com.