Backend Engineer; Node.js – AI x Finance

Position: Backend Engineer (Node.js) – AI x Finance
Backend Engineer (Node.js) – AI-Native Finance Infrastructure  Remote | Contract or Full-Time
Node.js
• Type Script  
• Distributed Systems
• AI Integrations
About Ledger Labs Ledger Labs is building  Ledgers

OS — the AI Operating System for Finance.
We are developing AI-native ERP infrastructure designed for:
Crypto hedge funds
Token foundations
Digital asset businesses
High-growth global startups
This is not another SaaS dashboard.
We are building financial infrastructure: AI-powered general ledger systems, treasury automation, real-time reconciliation, and intelligent financial agents.
Early-stage. Product-led. Execution-focused.

The Role We’re looking for a strong Backend Engineer (Node.js) to architect and build the core systems behind Ledgers

OS.
You will work directly with the founder to design and implement:
Scalable backend architecture for financial-grade workloads
Secure APIs and modular microservices
Multi-tenant data models and permissions frameworks
Authentication, RBAC, and audit-trail systems
AI service orchestration (LLM workflows, automation agents)
Real-time data ingestion (wallets, exchanges, external APIs)
Financial-grade database schemas (ledger design, transaction models)
High-performance, secure, and reliable infrastructure
This is a  core systems role  — not feature maintenance.
You will be building the foundation layer of an AI-native financial platform.
What We’re Looking For Required  3+ years production experience with Node.js
Strong Type Script proficiency
Experience building and maintaining production APIs
Solid database design (Postgre

SQL preferred)

Experience with REST and/or GraphQL
Understanding of backend security best practices
Ability to think in systems, not just endpoints
Strong Bonus  Experience in fintech, accounting systems, or crypto infrastructure
Familiarity with ledgers, financial data models, or reconciliation logic

Experience with real-time systems (Web Sockets, queues, streaming)
Experience integrating AI APIs (OpenAI, Claude, etc.)
Cloud infrastructure experience (AWS, GCP, etc.)
Experience handling high-integrity financial data
What You’ll Get  Direct influence over core product architecture
Early-stage equity upside
High ownership and autonomy
Remote flexibility
The opportunity to build infrastructure used by modern finance teams and crypto funds

How to Apply

Apply with:
Git Hub profile
Links to relevant projects
Short note explaining why this problem space interests you