Founding Engineer

Infinite • San Francisco, CA

5d

About The Position

Infinite is a stablecoin payment processor. We offer businesses turnkey APIs and SDKs to instantly move money anywhere in the world at a fraction of the cost of traditional solutions. The founding team previously built and scaled products at financial services category leaders Coinbase and Sardine . As our Founding Engineer , you will define, build, and maintain the technical foundation of our platform. You will join us in-person in a fast-paced, high-ownership environment where you will take ownership of everything, from architecture and implementation to production reliability for mission-critical services. You will partner directly with founders and early customers to translate real-world requirements into robust, high-quality products.

Requirements

• 2–5+ years of professional software engineering, including the delivery of 0-to-1 products and scaling them in production
• Proficiency in at least two of: Next.js/TypeScript, C#, Go, Python
• Hands-on expertise with asynchronous and event-driven architectures
• Full-stack ownership spanning modern front-end frameworks, back-end services, and cloud infrastructure
• Excellent written and verbal communication; ability to influence internal and external cross-functional stakeholders
• Proven expertise with AI-assisted development tools—especially Cursor or windsurf, to accelerate code generation, refactoring, and automated test creation

Nice To Haves

• Practical experience deploying lightweight machine-learning models for real-time anomaly detection, automated compliance reporting, or incident triage in production systems
• Experience designing and contributing to fintech, payments, or ledgering systems (e.g., double-entry ledgers, payments, clearing, or settlement)
• Experience integrating banking, payments, or compliance providers, or a demonstrated ability to onboard unfamiliar financial APIs quickly
• Prior leadership or mentorship in a high-growth engineering team

Responsibilities

• Full Stack & End-to-End – Design, implement, and operate complete services and user-facing features, from requirements gathering through production support
• System Design & Architecture – Develop highly available, event-driven systems for ledgering, compliance, and risk that scale with transaction volume while maintaining zero downtime
• Implementation Engineering – Embed with customers, collect feedback, and iterate rapidly to ensure our roadmap aligns with user needs
• Technical Decision-Making – Balance speed and long-term scalability, selecting appropriate technologies (Next.js/TypeScript, C#, Go, Python, modern cloud infrastructure) for each problem domain

What This Job Offers

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