Senior Full-Stack Engineer: Payments & AI in Fintech

re-zoo-me

Town of Texas (WI)

Hybrid

USD 150,000 - 190,000

Full time

9 days ago
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Job summary

re-zoo-me is seeking a senior backend-focused engineer to own the systems that move a distributor's money. You will ship end-to-end features in Ruby on Rails and connect the product to ERPs like NetSuite and Sage.

You will also deploy LLM-powered workflows for payments and collections, while collaborating with a small, independent team. You will join a flat, fast-moving team and participate in customer calls to derive real-world specs, ensuring safety and reliability as money moves through the

Qualifications

  • Shipped user-facing features to production end to end in the last 2 years (frontend, backend, schema, tests).
  • Deep backend experience in Ruby on Rails, Django or Spring Boot with PostgreSQL in production; designed schemas and migrations.
  • Five+ years as a backend-leaning full-stack engineer, ideally in small teams.
  • Experience using AI coding tools daily and awareness of their limitations.

Responsibilities

  • Build and run the payment processing systems and the financial APIs around them.
  • Connect the product to ERPs used by distributors (e.g., NetSuite and Sage) in both directions.
  • Ship LLM-powered workflows to production: credit decisions, remittance matching, customer communication and dispute handling.
  • Build evals, monitoring and guardrails for safe production use with real money.
  • Own data pipelines moving millions of financial records in near real time.
  • Improve collections automation and measure impact on cash flow.
  • Join customer calls and translate feedback into scoped, shippable work.

Skills

Ruby on Rails
PostgreSQL
Backend development
Full-stack engineering
AI coding tools

Tools

Django
Spring Boot
React

Job description

re-zoo-me is seeking a senior backend-focused engineer to own the systems that move a distributor's money. You will ship end-to-end features in Ruby on Rails and connect the product to ERPs like NetSuite and Sage.

You will also deploy LLM-powered workflows for payments and collections, while collaborating with a small, independent team. You will join a flat, fast-moving team and participate in customer calls to derive real-world specs, ensuring safety and reliability as money moves through the

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