Founding Full-Stack Engineer

Founding engineer building the technical foundation of a stablecoin payment processor. Infinite offers businesses turnkey APIs and SDKs to instantly move money globally at a fraction of the cost of traditional rails — targeting large US and EU-based B2B companies.

High-ownership across architecture, implementation, and production reliability for mission-critical financial services. Partner directly with founders and early customers to translate real-world payments requirements into robust products.

Market context: Payments infrastructure is heavily under-built. Recent comparables: Stripe's $1.1B acquisition of Bridge (at $17M revenue) and Stripe's $750M acquisition of Privy (at $7M revenue).

Key responsibilities:

• Full stack & end-to-end — design, implement, and operate complete services and user-facing features, from requirements through production support
• System design & architecture — build highly available, event-driven systems for ledgering, compliance, and risk that scale with transaction volume at zero downtime
• Implementation engineering — embed with customers, collect feedback, iterate rapidly to align roadmap with user needs
• Technical decision-making — balance speed and long-term scalability, choose the right tools per problem domain

Tech stack: Next.js, TypeScript, C#, Go, Python, modern cloud infra, AI-assisted dev tools (e.g., Cursor)

• Full stack & end-to-end — design, implement, and operate complete services and user-facing features, from requirements through production support
• System design & architecture — build highly available, event-driven systems for ledgering, compliance, and risk that scale with transaction volume at zero downtime
• Implementation engineering — embed with customers, collect feedback, iterate rapidly to align roadmap with user needs
• Technical decision-making — balance speed and long-term scalability, choose the right tools per problem domain

Must-have:

• 3–8 years as a software engineer in payments or compliance
• Platform engineering experience with payments or compliance exposure at Tier 1 VC-backed startups (e.g., Stripe, Rippling, Deel)
• Last role at a high-growth startup — hungry and scrappy (active GitHub a plus)
• Expertise across the stack — all-hands-on-deck with code, comfortable using AI-assisted dev tools
• Strong systematic thinker
• Proficient in at least two of: Next.js/TypeScript, C#, Go, Python
• Comfortable in-person in SF 3–5 days/week (open to remote for the right candidate)

Strongly preferred:

• Top 20 CS degree (MIT, Stanford, Cambridge, Oxford, Waterloo, Yale, Columbia, Princeton, Cornell, CMU) — not required if experience is compelling
• Background at top payments / fintech / crypto companies

Target companies: Stripe, Square, Adyen, PayPal, Braintree, Marqeta, Slope (YC S21), Coinbase, Kraken, Airbnb (plus 30+ more)

Top schools: MIT, Stanford, Cambridge, Oxford, Waterloo, Yale, Columbia, Princeton, Cornell, CMU (plus more)

Disqualifiers:

• Pure backend or pure frontend — must be full-stack
• Big-corp / slow-moving enterprise backgrounds without high-growth startup exposure
• Candidates without payments, compliance, or fintech context

Competitive hiring process with quick turnaround and flexible conditions

• 3rd-time founders with prior exits to Coinbase
• Post-product, pre-scale — product is built, customers have committed millions in transaction volume
• Strong market timing — payments infra under-built, comparables exiting at $750M–$1.1B (Stripe acquired Bridge at $1.1B, Privy at $750M)
• Tier 1 backing — $6M seed, 3–4 year runway
• Founding equity — 0.1%–1.0% with flexible base/equity mix ($220K–$280K)
• Cutting-edge stack — Next.js, TypeScript, C#, Go, Python, AI-native tooling
• Quick, flexible hiring process — fast turnaround, accommodating conditions