Senior Full-Stack Engineer: AI-Driven Fintech Platform

MX; Lehi (UT); On-site; USD 120,000 - 190,000; Full time

Job summary

MX is seeking a senior full-stack engineer to join the Experiences team in Lehi, UT. You will ship LLM-powered features, build embeddable widgets, and evolve our TypeScript backend services while maintaining high standards for performance and security.

You will own end-to-end development, participate in architecture reviews, mentor teammates, and collaborate with product managers to deliver delightful financial tools. A strong background in React/TypeScript and server-side APIs is essential.

Qualifications

• 5+ years of software development across full-stack systems.
• Experience shipping features on React + TypeScript with backend APIs.
• Hands-on with large language model integration and AI-powered features.

Responsibilities

• Write product or system development code.
• Lead design reviews and select technologies.
• Review code for best practices and maintainability.
• Triage issues and ensure scalable, secure systems.
• Collaborate with product managers to meet customer needs.
• Design, test, deploy, and maintain software solutions.

Skills

Full-stack development

React/TypeScript

API design & integration

LLM / AI feature development

Code reviews / best practices

Education

Bachelor's Degree or equivalent experience

Tools

Ruby on Rails

TypeScript/Node.js

PostgreSQL

Redis

NATS or RabbitMQ

Docker

Kubernetes

Job description

MX is seeking a senior full-stack engineer to join the Experiences team in Lehi, UT. You will ship LLM-powered features, build embeddable widgets, and evolve our TypeScript backend services while maintaining high standards for performance and security.

You will own end-to-end development, participate in architecture reviews, mentor teammates, and collaborate with product managers to deliver delightful financial tools. A strong background in React/TypeScript and server-side APIs is essential.