Backend Engineer (Node.js/TypeScript)

The Mortgage Office (Applied Business Software Inc.); San Mateo (CA); Hybrid; USD 150,000 - 170,000; Full time

Benefits offered by this job

401(k) matching

Wellness programs

Employee recognition programs

Team building & on-site amenities

Job summary

The Mortgage Office is seeking a Back-End Engineer to build scalable backend services in Node.js/TypeScript and contribute to the frontend with React. You will work across REST and GraphQL APIs, collaborating with designers and product managers to deliver polished user experiences.

Ideal candidates have 3+ years of full-stack experience, proficiency in TypeScript, and a track record of end-to-end feature delivery.

Qualifications

• 3+ years of professional, post-college software engineering experience as a full-stack developer.
• Strong proficiency in TypeScript across backend and frontend codebases.
• Extensive experience developing backend services using Node.js, including RESTful APIs, GraphQL, and microservices.
• Hands-on experience with relational and/or NoSQL databases, including schema design, migrations, and performance-conscious query development.
• Experience implementing authentication and authorization flows across backend APIs and frontend applications.
• Familiarity with performance optimization on both frontend and backend, including caching strategies and frontend rendering optimizations.
• Ability to deliver features end-to-end, from API and data model design through frontend integration and user experience.

Responsibilities

• Develop and maintain backend services and APIs using Node.js and TypeScript to support front-end functionality.
• Build responsive, type-safe frontend interfaces using React and TypeScript.
• Partner with the core backend team to define API contracts and ensure efficient data fetching patterns (REST or GraphQL).
• Collaborate with designers and product managers to translate requirements into intuitive, polished user experiences.

Skills

Node.js

TypeScript

React

GraphQL

REST APIs

SQL/NoSQL

Authentication/Authorization

Performance optimization

End-to-end delivery

Tools

Axios/Fetch

Web performance

Job description

The Mortgage Office is the most trusted loan management platform in private lending. Founded in 1978, we power the full loan lifecycle for over 1,100 lenders, including private money firms, CDFIs, nonprofits, and government agencies, servicing more than $190 billion in loans.

We're recognized as G2's #1 Loan Servicing Software and Capterra's Best Ease of Use. With offices in Huntington Beach and San Mateo, we're now building the next generation of AI-native lending tools, and hiring a Back-End Engineer (Node.js/TypeScript) to help lead that work.

The Opportunity

We are seeking a Back-End Engineer with 3+ years of professional experience in Node.js, and TypeScript, who will build the core user experience of our application. This role will focus on developing high-quality, scalable back-end services that power our platform, supporting our continued growth as a SaaS business and strengthening internal processes, performance, and cross-team alignment.

What You'll Own

• Develop and maintain backend services and APIs using Node.js and TypeScript to support front-end functionality.
• Build responsive, type-safe frontend interfaces using React and TypeScript.
• Partner with the core backend team to define API contracts and ensure efficient data fetching patterns (REST or GraphQL) for the frontend application.
• Collaborate with designers and product managers to translate requirements into intuitive, polished user experiences.

What You Bring

Required

• 3+ years of professional, post-college software engineering experience as a full-stack developer, excluding academic projects and coursework.
• Strong proficiency in TypeScript across backend and frontend codebases, building and maintaining production-grade systems in a professional environment.
• Extensive experience developing backend services using Node.js, including RESTful APIs, GraphQL, and service-oriented or microservices architectures used in production.
• Hands-on experience working with relational and/or NoSQL databases, including schema design, migrations, and performance-conscious query development.
• Experience implementing authentication and authorization flows across backend APIs and frontend applications.
• Familiarity with performance optimization on both frontend and backend, including efficient API design, caching strategies, and frontend rendering optimizations.
• Ability to deliver features end-to-end, from API and data model design through frontend integration and user experience

Preferred

• Experience with React for building scalable web applications, including component design, Hooks, state management, and asynchronous data handling.
• Understanding of frontend architecture, including reusable component patterns, client-side data fetching, error handling, and rendering performance considerations.
• Experience with modern frontend tooling (Vite, Webpack, ESLint, Prettier).
• Familiarity with component libraries (e.g., Material UI, Tailwind CSS) to accelerate UI development.
• Proficient with database technologies (SQL or NoSQL) and writing server-side logic to support frontend requirements.
• Experience integrating complex APIs and visualizing data (e.g., using charting libraries or building interactive dashboards).
• Competitive compensation (Base: $150,000 - $170,000) + Bonus
• 401(k) matching
• Wellness programs
• Employee recognition programs
• Team building & on-site amenities

Life at TMO,

TMO pairs 45+ years of category leadership with a culture that's still hands-on and collaborative. Ideas flow freely, every team member has a voice, and we have fun while we build.

Our Values: DRIVE

• Data-Driven: numbers over opinions.
• Respect: high on empathy, low on ego.
• Initiative & Agency: don't wait to be told.
• Value to Customers: create value for them above all else.
• Evolve: progress over perfection.

The pay range for this role is:

150,000 - 170,000 USD per year (San Mateo, CA (Hybrid))