Senior Backend Engineer - Rails, AI (Remote)

Backend Engineer

Join as a Backend Engineer and help rebuild payments for the $1tn distribution industry. You'll architect and build the systems that process millions of dollars in transactions daily, integrate with complex ERP systems, and leverage cutting-edge LLM technology to transform how distributors manage their revenue cycles.

You'll join a small team of A+ players where everyone acts as an individual contributor while actively supporting each other through pair programming and collaborative problem-solving. You'll work closely with our founder-led team who previously operated a distribution business and understand the real-world problems we're solving.

Who Thrives Here (read this first — it saves everyone time)

• AI-Native: You already use Cursor, Claude, GitHub Copilot, or similar every single day. You treat AI as a pair programmer, not a toy or a threat.
• Product-minded: You obsess over the "why" behind features, dig into customer data (or talk to customers), and measure success in revenue and user love — not story points.
• Ownership > tasks: You hate being blocked. When something is unclear or broken, you prototype, reach out directly, pair, or just ship a pragmatic solution.
• Builder mentality: Strong opinions, weakly held. You default to shipping the simplest thing that works (often with AI help), then iterate fast.

What You'll Own

• 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

Must-Have

• 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

Bonus Points

• 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

Tech Stack (today — evolves fast)

• Backend: Rails 7+, PostgreSQL, Sidekiq, Redis
• Infra: AWS, Docker, Terraform, CI/CD
• AI: OpenAI / Anthropic APIs, vector DBs, Cursor/Claude daily
• Security: Bank-grade encryption, SOC 2 in progress

Engineering Culture

True end-to-end ownership — no PMs writing pixel-perfect specs. We pair program (human + AI), ship daily, write tests that matter, and refactor mercilessly. AI tools are first-class citizens here: we expect you to 10× your output with them and help us push the boundaries of what's possible in fintech automation.

Benefits

• Flexible paid time off so you can recharge.
• Up to $100/mo wellness reimbursements.
• A competitive stock option grant, so you have skin in the game.
• Medical, dental, and vision insurance, with 100% of premiums paid by us.
• Quarterly team gatherings for periodic in-person collaborative strategy and work sessions.
• A passionate, supportive team dedicated to learning and growing together.