Senior Backend/Full Stack Engineer

About the Role

Join an engineering team building distributed messaging infrastructure that enables AI agents to work across popular communication platforms. You will own complex systems from architecture through production, shaping the APIs and internal platforms that make the infrastructure reliable and easy to use.

What You'll Do

• Design and operate highly available backend services for large-scale, real-time messaging workloads.

• Own projects end to end, from defining the problem and designing the architecture through deployment and ongoing operation.

• Build intuitive APIs, SDKs, and developer tools with thoughtful abstractions.

• Address distributed systems challenges involving reliability, concurrency, fault tolerance, and message delivery.

• Contribute across backend services, dashboards, internal tools, and infrastructure as needed.

• Make pragmatic technical decisions that balance engineering quality with delivery speed.

• Use AI coding agents effectively while reviewing generated code and understanding its operational impact.

• Take part in architecture discussions, code reviews, and incident analysis.

What We're Looking For

• At least 3 years of professional software engineering experience, including substantial experience building and operating production backend systems.

• Strong TypeScript and Node.js skills, plus experience with another backend language such as Go, Rust, or Swift.

• Fluency in Mandarin.

• Solid knowledge of distributed systems, concurrency, networking, databases, and API design.

• Hands-on experience with PostgreSQL, Redis or other NoSQL systems, AWS, Kubernetes, and cloud infrastructure.

• Ability to independently design, build, deploy, and maintain complex systems, with experience in service reliability, observability, incident response, and performance optimization.

• Strong engineering judgment, including the ability to critically evaluate AI-generated code.

Compensation & Benefits

$100,000 to $200,000 base salary annually, plus equity. H-1B sponsorship, OPT, and CPT support are available.

Location

On-site in San Francisco, California.