Full Stack Developer (AI-Native)

About JMAC Lending
At JMAC Lending, we pride ourselves on over 25 years of dedicated service. Our mission is to provide exceptional support and innovative solutions that empower our partners to thrive. We’re not just about meeting today’s market demands; we aim to be the preferred lender that clients turn to again and again. Our talented team boasts impressive credentials, continuously enhancing their skills through ongoing education, ensuring a perfect blend of knowledge and experience. Built on a foundation of the highest ethical standards, we are committed to delivering competitive product pricing with efficiency and precision for wholesale and correspondent lending.
The Opportunity
This position will build and maintain the applications behind JMAC Lending’s modern application platform, including the broker portal, internal workflow tools, dashboards, and AI-powered features, on a current TypeScript stack. Reporting to the IT Manager on a small applications team, this position owns assigned problems end to end: front-end and back-end development, integrations with our loan origination system and third-party platforms, workflow automation, and ongoing support of what it ships. JMAC works AI-natively, and this position is expected to use AI coding assistants well while retaining full responsibility for understanding, debugging, and defending everything delivered, regardless of who or what wrote the first draft.
This is a Full-Time/Remote opportunity with varying working hours from 8-5pm PT Monday-Friday offering competitive pay ranging from $90,000-130,000 annually and is also eligible for an annual discretionary bonus.
Key Responsibilities
Application Development
- Build and maintain internal and partner-facing applications, including the broker portal, dashboards, and workflow tools.
- Develop front end in React, Next.js, TypeScript, and Tailwind CSS, owning interaction and visual quality: layout, states, empty and error cases, responsiveness, and accessibility.
- Develop back-end services and APIs on Azure Functions and Node.js/TypeScript, with Python or C#/.NET for specific services; work in Postgres through an ORM, writing queries and evolving schemas.
- Build AI-powered features with real-time streaming responses and keep them correct as prompts, models, and knowledge bases change.
- Help build the tooling layer that allows AI assistants and agents to securely operate internal systems and data.
- Implement role-based access control, audit logging, and input validation so sensitive workflows remain secure and compliant.
- Write tested, reviewed code and follow the team’s version control, CI/CD, and code review practices.

Automations & Integrations
- Design and maintain integrations between internal systems, the loan origination system, and third-party platforms including e-sign and email.
- Build workflow automations using Azure Logic Apps, Power Automate, and low-code tools; monitor and optimize existing automations.
- Keep integrations within the mortgage industry’s data governance, security, and compliance requirements.

Support & Ticket Resolution
- Support the applications and automations owned by this position and the team: triage tickets, fix bugs, monitor application health, and coordinate releases. This is a regular part of the week; you support what you ship.

Problem Ownership
- Own assigned problems end to end: understand how the work actually gets done, propose the solution, and stay accountable for whether the shipped result improved the outcome.

Documentation & Knowledge Sharing
- Treat documentation as part of finishing: update architecture notes, API references, and diagrams in the same change that ships the code. Log a changelog entry per change and a release note when users can see it.

Requirements
- 3+ years building and shipping web applications, or equivalent demonstrable project experience; what has been built is weighted over exact years. Works independently once the problem i