Back End Developer

Underdog: Verified engineers. Interview-ready. Searching confidentially. And companies apply to you; United States; On-site; USD 120,000 - 170,000; Full time

Job summary

Underdog is seeking a backend engineer to architect core systems that securely navigate authenticated environments and transform unstructured data into actionable intelligence at scale. You will build resilient AI agents, implement authentication workflows, and design scalable data pipelines in GCP environments.

Join a team that values autonomy, craftsmanship, curiosity, and clear communication. Must be authorized to work in the U.S. No visa sponsorship.

Qualifications

• 3+ years backend engineering experience shipping production systems.
• Experience with REST APIs, cloud platforms (GCP/AWS/Azure), and databases.
• Familiarity with containerization (Docker) and CI/CD pipelines.

Responsibilities

• Build Resilient AI Agents: automate complex logins (including MFA), extract unstructured data, and handle dynamic web interfaces without APIs.
• Engineer Secure Foundations: authentication workflows for diverse platforms and scalable APIs for enterprise-grade solutions.
• Design Data Infrastructure: implement GCP-based data pipelines, optimize PostgreSQL performance, ensure data integrity for millions of records.
• Ship End-to-End Systems: develop third-party integrations, testing suites, and observability tools with focus on reliability.
• Collaborate Strategically: work with senior engineers on system architecture and product teams.

Skills

Backend engineering

REST APIs

CI/CD

Docker

Tools

GCP

AWS

Azure

PostgreSQL

Job description

Our hiring partner is pioneering a platform backed by $14M from top-tier investors, enabling enterprises to deploy authenticated AI agents for mission-critical workflows.

Their technology solves a fundamental challenge: securely accessing and transforming data trapped behind complex authentication barriers. We’ve automated weeks-long manual processes into minutes for industry leaders. Join our growing team to build the infrastructure that makes every business system AI-accessible.

Your Mission

Architect core systems that allow AI agents to securely navigate authenticated environments—from dynamic web interfaces to legacy systems—transforming unstructured data into actionable intelligence at scale.

Key Responsibilities

• Build Resilient AI Agents: Develop systems that automate complex logins (including MFA), extract unstructured data, and handle dynamic web interfaces without APIs.
• Engineer Secure Foundations: Create authentication workflows for diverse platforms and scalable APIs for enterprise-grade solutions.
• Design Data Infrastructure: Implement GCP-based data pipelines, optimize PostgreSQL performance, and ensure integrity for millions of records.
• Ship End-to-End Systems: Develop third-party integrations, testing suites, and observability tools with a focus on reliability.
• Collaborate Strategically: Work with senior engineers on system architecture and product teams to solve real customer challenges.
• Infra: GCP, Docker, GitHub Actions (CI/CD)

Who You Are

• 3+ years backend engineering experience shipping production systems.

Technical Mastery:

• Experience with REST APIs, cloud platforms (GCP/AWS/Azure), and databases
• Familiarity with containerization (Docker) and CI/CD pipelines

Cultural Fit:

• Autonomy: Own outcomes end-to-end in ambiguous environments
• Craftsmanship: Balance best practices with pragmatic delivery
• Curiosity: Continuously explore authentication, security, and AI/automation
• Communication: Document decisions and align cross-functional teams

Nice-to-Haves

• Knowledge of OAuth, SAML, or security protocols
• Startup experience or open-source contributions
• Monitoring tools (Prometheus, Grafana, etc.)

Why Join

• Impact Critical Infrastructure: Your code enables AI to access 90% of enterprise data currently locked behind logins.
• Founder-Level Equity: Significant ownership in a well-funded startup.
• Strong Team: Learn from former founders and early engineers who scaled 0-1 products.

For Builders of the AI-Authenticated Future

Let’s make every business system AI-accessible.

Must be authorized to work in the U.S. No visa sponsorship.