Suppli is a company focused on revolutionizing payments in the distribution industry. They are seeking a Senior Backend Engineer to architect and build systems that handle millions of transactions daily, integrate with ERP systems, and utilize LLM technology for enhanced revenue cycle management.
Responsibilities:
- High-volume payment processing systems and secure financial APIs
- Deep integrations with major ERPs (NetSuite, Sage, Acumatica, etc.)
- LLM-powered workflows (credit decisions, remittance matching, automated comms)
- Real-time data pipelines handling millions of financial records
- AR / collections automation that directly impacts customer cash flow
Requirements:
- 4+ years of backend experience with strong system design chops
- Expert-level Ruby on Rails (Rails 7+, Ruby 3+) — our core backend is modern Rails and you'll own huge parts of it from day one → Exceptional candidates with deep experience in Django, Laravel, Spring Boot, or similar who are excited to go all-in on Rails will be considered
- Advanced PostgreSQL (query optimization, large datasets, logical replication, etc.)
- Proven ability to design clean, versioned REST/JSON APIs
- Experience shipping and operating ETL/background-job heavy systems in production
- Built or maintained third-party integrations with enterprise software
- Real fintech, payments, or billing experience (Stripe, ACH, lockbox, etc.)
- Hands-on LLM integration or prompt engineering (bonus if you've shipped it to production)
- Previously worked at a Series A–C startup and loved the chaos