Senior/Staff Software Engineer, Experience

United States Digital Space LLC; United States; Hybrid; USD 150,000 - 230,000; Full time

Benefits offered by this job

Health coverage

401(k) Plan

Equity award

Flexible time off

Parental leave

Annual Company Retreat

WFH Equipment Stipend

Job summary

United States Digital Space LLC in New York seeks an engineer to own end-to-end developer experiences across API, SDK, CLI, and web surfaces. You’ll work with product, design, and other engineering teams to identify user needs and deliver the right abstractions at the right time, enabling rapid AI-assisted development.

You will build observable, auditable systems and leverage AI coding tools like Claude Code, Cursor and Copilot to accelerate delivery, while shaping MCP-driven workflows and

Qualifications

• Senior or Staff Engineer with strong autonomy and API/SDK ownership.
• Hands-on experience shipping with AI coding tools as part of workflow.
• Proven ability to design and deliver versioned APIs, SDKs, or client libraries.

Responsibilities

• Pioneer agent experience and MCP design for AI agents interacting with the platform.
• Ship end-to-end experiences across API, SDK, CLI, and web surfaces.
• Build systems that multiply team output with AI-powered workflows and verifiable quality gates.
• Collaborate with product, design and engineering to identify user needs and build at the right abstraction level.

Skills

Software engineering

AI coding tools

API design

React / web UI

Cloud platforms

Tools

Claude Code

Cursor

Copilot

AWS

Job description

About the company

the company is the knowledge infrastructure for AI at scale. Its leading vector database and knowledge engine, the company Nexus, power accurate, performant AI applications for more than 9,000 customers and 800,000 developers worldwide. the company's mission is to make AI knowledgeable. the company is based in New York and raised $138M in funding from Andreessen Horowitz, ICONIQ, Menlo Ventures, and Wing Venture Capital.

About the Team and Role:

The Experience team is at the center of one of the most exciting transitions in software development history — the shift from human-driven to agent-driven product experiences. We own the company's API, clients, authentication, revenue, and observability systems, and right now that means redesigning all of it for a world where AI agents are first-class users alongside humans.

This is a wide-scope role. You'll own things end-to-end — from backend architecture to API design to SDK and web surfaces. You’ll be working closely with product, design, and other engineering teams to identify user needs and build the right thing, at the right abstraction level, at the right time. Along the way, you will be building high-leverage platform capabilities that accelerate the company’s product development and user growth systems.

We're looking for an engineer who sees this moment for what it is: a rare opportunity to shape how developers and agents interact with a category-defining product. You're not waiting to see how the industry figures out MCP, agentic workflows, and AI-native interfaces — you're already experimenting, already forming opinions, already building. You know that speed and leverage matter more than labor, and you've internalized AI-assisted development not as a productivity trick but as a fundamentally different way of working.

Responsibilities:

• Pioneer our agent experience. Shape how AI agents interact with the company — designing interfaces, protocols (MCP), and tooling that make the company the easiest and most capable platform for agentic workflows to build on.

• Ship end-to-end experiences across API, SDK, CLI, and web. You'll own the full surface, from the HTTP layer to the UI, and you'll make calls across all of it.

• Build systems that multiply team output. We care about what ships, not how many hours went into it. Design AI-powered workflows, automated quality gates, and high-leverage platform capabilities that let a small team move at a pace that would otherwise require 10x the headcount.

• Set the standard for AI-assisted development on the team. Use the best tools available — Claude Code, Cursor, or whatever works — and help establish patterns that make the whole team faster.

• Collaborate with product, design, and engineering to identify what users (and agents) actually need and build it at the right abstraction level, at the right time.

• Build observable, auditable systems with monitoring, alerting, and verification mechanisms — because in a high-velocity environment, you need systems that tell you when something's wrong.

Requirements:

Senior and Staff Engineers at the company operate with high autonomy. You'll be an active partner in setting strategy on APIs, agent interfaces, observability, and developer experience — not just executing on a roadmap. We care more about how you think and how you work than whether your resume checks every box.

You should have:

• At least 4 years of software engineering experience

• A bias toward automation and leverage — you reach for systems and tooling before you reach for elbow grease

• Hands-on experience shipping with AI coding tools (Claude Code, Cursor, Copilot, or similar) as a genuine part of your workflow

• Proven ability to design and deliver versioned APIs, SDKs, or client libraries

• Proficiency building web interfaces with React or similar

• Experience with at least one major cloud provider (AWS, GCP, Azure)

• Strong intuition for what makes APIs easy for both humans and agents to use correctly

Bonus points for:

• Experience building or consuming MCP servers, or designing APIs explicitly for agent use cases

• Familiarity with agentic frameworks and the emerging patterns around tool use, orchestration, and agent-to-agent communication

• Strong familiarity with a compiled language like Rust, Go, or Java

• Experience with large-scale open-source projects

• Experience developing database or query engine SDKs

Perks & Benefits:

• Comprehensive health coverage including medical, dental, vision, and mental health resources

• 401(k) Plan

• Equity award

• Flexible time off

• Paid parental leave

• Annual Company Retreat

• WFH Equipment Stipend

All qualified applicants will receive considerations for employment without regard to race, color, religion, sex, age, disability, marital status, familial status, sexual orientation, pregnancy, gender identity, gender expression, national origin, ancestry, citizenship status, veteran status, and any other legally protected status under federal, state, or local anti-discrimination laws.