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.