Backend Engineer (Ruby), AI Engineering: Duo Agent Platform Tools

United States Digital Space LLC; United States; Hybrid; USD 80,000 - 120,000; Full time

Benefits offered by this job

Flexible Paid Time Off

Equity Compensation

Growth and Development Fund

Job summary

United States Digital Space LLC is hiring an Intermediate Backend Engineer for the Agent Tools team. You will be involved in developing features that enable AI agents to work effectively throughout the software delivery process.

The role requires strong experience with Ruby on Rails, REST, and GraphQL APIs, as well as practical knowledge of AI tooling. The company offers employee-friendly policies designed to support health, wealth, and well-being while fostering an equal opportunity workplace.

Qualifications

• Experience building and maintaining production applications with Ruby on Rails.
• Proficiency in designing or extending REST and/or GraphQL APIs.
• Strong practical experience working with AI tooling.

Responsibilities

• Develop, ship, and maintain features for Agentic Tools.
• Collaborate with cross-functional teams for product enhancements.
• Implement and review GraphQL and REST APIs ensuring reliability.

Skills

Ruby on Rails

REST APIs

GraphQL APIs

SQL

AI tooling

Python

Vue

Job description

An overview of this role

As an Intermediate Backend Engineer on the the company Agent Tools team, you’ll go beyond using AI tools and help define how we design, build systems that allow AI agents to interact with the full software delivery lifecycle, going far beyond pure code creation. This involves the company’s MCP server as well as future technologies aimed at providing AI agents with ways to interact with the company.

In this role you’ll contribute to the development of complex features and help establish architectural patterns for how the company exposes its rich functionality to AI agents. You’ll collaborate closely with engineers across the Agent Foundations stage and adjacent teams within AI engineering. This is a high‑visibility area of the product at the intersection of the company’s core platform and its AI strategy.

What you’ll do

• Develop, ship, and maintain features and improvements for Agentic Tools across the the company monolith backend in a secure, well‑tested, and performant way.
• Collaborate with Product Management, UX, frontend, backend, and AI specialists to refine requirements and deliver high-quality, iterative product enhancements.
• Design, implement, and review GraphQL, REST APIs and related backend logic, ensuring reliability, scalability, and clear contracts with frontend clients.
• Improve and extend automated testing, including RSpec and other frameworks, to strengthen quality, reliability, and developer feedback loops.
• Share standards, patterns, and learnings with other engineers, raising the bar for responsible AI integration and evidence-driven engineering across the team.
• Participate in Tier 2 on‑call rotations to troubleshoot production issues, contribute to root cause analysis, and enhance observability and resiliency.

What you’ll bring

• Experience building and maintaining production applications with Ruby on Rails, including work with background jobs, APIs, and data models.
• Comfortable working across the stack in a mature codebase. Familiarity with Python backends and/or Vue frontends is a plus.
• Proficiency in designing or extending REST and/or GraphQL APIs with attention to scalability, maintainability, and backward compatibility.
• Strong practical experience working with AI tooling on a daily basis. Experience designing and shipping AI‑powered backend features and integrations is a plus.
• SQL skills and familiarity with relational databases such as PostgreSQL, including writing efficient queries and understanding data modeling.
• Openness to learning, collaborating in an async‑first, distributed team, and applying transferable skills from related technologies or domains.
• Clear written and verbal communication skills, including writing technical proposals and documentation, and collaborating effectively in a remote, asynchronous, cross‑functional environment.

About the team

Agent Tools is a new functional team within the Agent Execution group. The team itself will initially consist of three engineers across AMER and EMEA timezones. The whole Agent Execution group consists of 8+ engineers. Beyond the Agent Tools team, Agent Execution consists of further teams focused on agent observability and executing agents on the company’s runners. We’re partnering with teams both within the AI space as well as all over the company to ensure that the Duo Agent Platform can become the backbone of many AI features at the company.

How the company Supports Full‑Time Employees

• Benefits to support your health, finances, and well‑being
• Flexible Paid Time Off
• Team Member Resource Groups
• Equity Compensation & Employee Stock Purchase Plan
• Growth and Development Fund
• Parental Leave

the company is proud to be an equal opportunity workplace and is an affirmative action employer. the company’s policies and practices relating to recruitment, employment, career development and advancement, promotion, and retirement are based solely on merit, regardless of race, color, religion, ancestry, sex (including pregnancy, lactation, sexual orientation, gender identity, or gender expression), national origin, age, citizenship