Senior Backend Engineer for Real-Time Messaging | SF, Equity

Abundant Code; San Francisco (CA); On-site; USD 100,000 - 200,000; Full time

Benefits offered by this job

H-1B sponsorship and OPT/CPT support

Job summary

Clea in San Francisco is seeking a Senior Backend / Full Stack Engineer to design, build, and operate scalable messaging infrastructure for AI agents. You will own end-to-end projects from architecture through production, partnering with developers to deliver reliable agent experiences across familiar interfaces.

The role emphasizes strong TypeScript/Node.js skills, distributed systems, and collaboration in a small team.

Qualifications

• At least 3 years of professional software engineering experience, including production backend systems.
• Strong proficiency in TypeScript and Node.js, plus experience with Go, Rust, or Swift.
• Solid understanding of distributed systems, concurrency, networking, databases, and API design.

Responsibilities

• Design and operate highly available backend services for large-scale, real-time messaging workloads.
• Own projects end to end, including problem definition, architecture, implementation, deployment, observability, and ongoing operation.
• Build intuitive APIs, SDKs, developer tools, dashboards, and internal platforms.
• Address distributed systems challenges involving reliability, concurrency, fault tolerance, message delivery, queuing, and consistency.
• Contribute across backend services, infrastructure, internal tooling, and user-facing developer experiences.
• Evaluate technical tradeoffs and make pragmatic decisions that balance quality with execution speed.
• Use AI coding agents thoughtfully while maintaining a strong understanding of code, architecture, and operational impact.
• Take part in architecture discussions, code reviews, and incident analysis.

Job description

Clea in San Francisco is seeking a Senior Backend / Full Stack Engineer to design, build, and operate scalable messaging infrastructure for AI agents. You will own end-to-end projects from architecture through production, partnering with developers to deliver reliable agent experiences across familiar interfaces.

The role emphasizes strong TypeScript/Node.js skills, distributed systems, and collaboration in a small team.