Principal Core Infrastructure Engineer Equity Series B fintech leader

Position: Principal Core Infrastructure Engineer ($190,000-$240,000 + Equity) at $145M Series B fintech leader

Job Title

Principal Core Infrastructure Engineer

Salary

$190,000-$240,000 + Equity

Company Description

$145M+ Series B fintech leader backed by Oak HC/FT, Costanoa Ventures, and the CEO of Pinterest

Job Description

As a Principal Engineer, you will architect and evolve the cloud infrastructure powering an advanced all-in-one card issuance and program management platform. You will lead the design of secure, multi-continental systems across GCP and AWS, ensuring the stability and performance required to transform how global businesses embed modern financial services.

Location

San Francisco, USA

Why this role is remarkable

• Join a high-growth scale-up founded by former Braintree, Pay Pal, and Lending Club executives that has raised over $145M from top-tier VCs like Westcap and Adams Street.
• Architect a global payments infrastructure from the ground up, moving into multiple continents to support use cases that don't even exist yet in the embedded finance space.
• Work in a high-leverage environment with a flat hierarchy, gaining direct exposure to leadership while utilizing cutting-edge AI-powered development tools to push engineering boundaries.

What You Will Do

• Collaborate cross-functionally to build a secure, cost-effective infrastructure platform that empowers engineering teams to iterate rapidly via modern CI/CD pipelines.
• Design and implement robust monitoring, alerting, and container orchestration frameworks across GCP and AWS to maintain mission-critical payment services.
• Lead the technical evolution of compute, storage, and networking layers to ensure 100% reliability for ledger, wallet, and card-processing functionalities.

The ideal candidate

• 12+ years of expertise in infrastructure or software engineering with a proven track record of building large-scale distributed systems and cloud networking.
• Deep technical proficiency in Kubernetes, Istio, and cloud-native services like Google Spanner, Big Query, or Dataflow, alongside strong Java or Python skills.
• Advanced experience with AI-driven development tools (like Claude Code) and a commitment to utilizing AI to accelerate the full software development lifecycle.