Staff Software Engineer (Backend)

MLabs • New York, NY

5h • Remote

About The Position

We aren't building another chatbot or a "copilot" to sit on a sidebar. We are building the next generation of the workforce: Autonomous AI Employees.
Our flagship product is an AI Business Development Representative (BDR) that doesn't just assist a sales team—it joins it. She researches leads, manages her own deliverability infrastructure, handles objections, and books meetings autonomously. With over $8M ARR, $35M+ in funding (including Y Combinator), and a rapidly growing customer base, we are now tackling the engineering mountain of "Ava 2.0." We are looking for foundational engineers to build the backend orchestration that makes autonomous digital workers a reality.
The Role
As a Staff Software Backend Engineer, you will build the engine that allows AI employees to think, act, and evolve. This is a high-leverage role where you will own major portions of a platform that replaces an entire enterprise sales stack—including CRM, lead databases, and campaign engines—within a single product.

Requirements

• 6+ years of backend experience, ideally in a high-growth startup environment where you owned systems from ideation to production.
• Deep understanding of distributed systems, database performance, and API design. You should be comfortable building data-intensive services at scale.
• You are a "5x engineer" who knows how to leverage modern tools (like Claude Code) to accelerate your output.
• Experience with cloud-native infrastructure, including containers, orchestration, CI/CD, and observability.
• You have strong opinions on reliability and testing but possess the judgment to know when to move fast to hit market windows.
• TypeScript/Node is preferred, but we value strong fundamentals in Python, Go, or similar languages.

Responsibilities

• AI Orchestration: Design and build the high-throughput pipelines that allow our AI to process millions of signals (lead data, engagement metrics, behavioral patterns) and make real-time decisions.
• Platform Ownership: Build and scale the infrastructure for email deliverability, inbox management, and complex AI coordination.
• End-to-End Execution: We don’t separate architecture from implementation. You will design, build, deploy, and monitor your own systems.
• Rapid Iteration: Work in a flat engineering org with zero red tape. We ship constantly and move at the speed of a high-growth startup.

Benefits

• Meaningful Impact: You’ll be working on non-trivial backend complexity involving autonomous agents making real-world decisions.
• High Ownership: Small team, massive scope. There are no layers between your code and the customer.
• Competitive Compensation: A strong base salary and significant equity in a company with proven revenue and traction.
• Culture of Excellence: Join a "winning team" environment—low ego, high standards, and direct communication.
• Flexibility: Positions available in San Francisco, New York City, or Remote (US).

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: No Education Listed