Senior Backend Engineer

Job overview

The Senior Backend Engineer role is onsite in San Francisco, California. Base compensation is $170,000–$250,000, plus competitive equity. The AI-native fintech company builds credit and payments infrastructure for B2B commerce and supports live enterprise workflows. The engineer owns production backend systems for payments and credit decisions, building reliable services, APIs, data models, and internal tools. The role works across engineering, risk, and data science to deliver production-grade systems and data contracts, from architecture through production support.

What you'll do

• Build and own backend systems for payments and credit workflows using TypeScript and Node.js
• design APIs, services, data models, and contracts
• create internal tools for reviewing decisions and tracing data lineage
• improve reliability and latency
• collaborate with risk and data science on data requirements
• own work from architecture through production support.

What we're looking for

Skills & competencies

senior backend engineer

san francisco ca

onsite

$170k–$250k

typescript

node.js

aws lambda

postgresql

snowflake

payments

credit workflows

fintech

the french sourcer

Work arrangement

• Weekend coverage required

Benefits & perks

• Competitive equity.

Why this role

TypeScript and Node.js; AWS serverless architecture using Lambdas; PostgreSQL and Snowflake; production systems serving enterprise customers; 5–12 years of backend experience sought.

About the employer

The French Sourcer is hiring for this role. Industry: Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services. Sector: 51.