Lead Fintech Engineer / International Payments

SeedScaler; San Francisco, Northern (CA, KY); Hybrid; USD 180,000 - 240,000; Full time

Job summary

SeedScaler is seeking a Lead Fintech Engineer to drive backend architecture for a consumer finance product enabling international use with a stablecoin wallet. You will shape engineering standards, oversee secure, scalable systems handling real money at scale across global rails.

The role emphasizes ownership, architecture, and hands-on delivery in a senior, high-ownership leadership capacity for payments and fintech infra.

Qualifications

• 5+ years building fintech production software.
• Experience designing APIs and building reliable, secure systems.
• Strong backend fundamentals with Postgres, Redis, AWS.
• Experience with ledgering, payments processing, stablecoin infrastructure, or risk/fraud.
• Full-stack capability and willingness to flex across the stack.

Responsibilities

• Lead backend engineering for a consumer-facing financial platform.
• Define engineering standards and best practices across testing, observability, security, and deployment.
• Build and scale systems across ledgering, payment rails, wallets, and banking integrations.
• Integrate third-party providers for authentication, KYC and KYB, ledger, banking services, and crypto wallet infra.
• Identify performance or isolation needs and break services out of the monolith when warranted.
• Power REST APIs for iOS, Android, and web frontends.

Skills

APIs design

Backend fundamentals

Full-stack capability

Security and reliability

fintech production

Ledgering / payments / stablecoin / r​

Tools

Postgres

Redis

AWS

Job description

Lead Fintech Engineer / International Payments

We’re looking for a Lead Fintech Engineer to join a well-funded, early-stage fintech company building a consumer finance product for international users. The product combines core banking capabilities with a stablecoin wallet to enable seamless movement of value within a global financial ecosystem.

This is a senior, high-ownership leadership role. You will work closely with technical founders to set engineering standards and build secure, reliable systems that handle real money at scale internationally.

Why consider this role

You want to build modern financial infrastructure, including payments and stablecoin-enabled flows.

You prefer small, senior teams that ship quickly and iterate in production.

You care about security, correctness, and operational excellence in systems that move money.

You want meaningful influence on architecture and technical direction from day one.

What you will do

Lead backend engineering for a consumer-facing financial platform serving iOS, Android, and web clients.

Define engineering standards and best practices across testing, observability, security, and deployment.

Build and scale systems across ledgering, payment rails, wallets, and banking integrations.

Integrate third-party providers for authentication, KYC and KYB, ledger, banking services, and crypto wallet infrastructure.

Identify performance or isolation needs and break services out of the monolith when it is warranted.

Python (FastAPI) monolith

Postgres and Redis

AWS

Openness to Rust and or Go for performance-sensitive services

REST APIs powering iOS, Android, and web frontends

What we are looking for

5+ years building and shipping fintech software in production.

Deep expertise in at least one of the following domains: ledgering, payments processing, stablecoin infrastructure, or risk and fraud.

Strong backend fundamentals, including Postgres, Redis, and AWS.

Experience designing APIs and building highly reliable, secure systems.

Full-stack capability and willingness to flex across the stack when needed.

Experience building B2C banking products or high-scale consumer payments.