Backend Software Engineer

castle· Engineering & Product
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🌍 Remote📍 Harvard Square📍 New York CityFullTime💰 USD 98K–145K/yr

About this role

Castle is the finance app that saves homeowners time and money.

  • Homeowners use Castle to pay for and track all of their home expenses in one place. Castle then monitors those transactions for opportunities to save. The average Castle customer saves more than $10,000 on their home.

  • Housing affordability is a major problem in the U.S. At Castle, we believe that homeowners deserve better data when it comes to managing their biggest asset. We’re building payments infrastructure for the largest consumer category in the U.S. — to help people automate, consolidate, and reduce their spend.

In this role you’ll be a foundational and versatile member of our engineering team, focused on building a simpler, smarter, and more intuitive experience for homeowners. You’ll collaborate closely with our Head of Engineering, Head of Design, and fellow engineers to bring to life a user-friendly app that clarifies complex home expense management and builds long-term trust with our customers. This role is perfect for someone who is passionate about solving complex problems and shaping a powerful product experience at an early-stage, high-growth company.

Core Responsibilities Include:

  • Developing and maintaining REST APIs using Django.

  • Managing and optimizing our cloud infrastructure.

  • Overseeing CI/CD pipelines, as well as monitoring, logging, and alerting systems.

  • Building mission-critical features including:

    • Bill payment system for processing ACH and check payments;

    • AI-powered system for recording payments made outside of Castle environment;

    • Data pipeline that transforms customer data into insights.

What you'll need:

  • Expertise with Python and Django framework.

  • Expertise in RESTful API design.

  • Experience with distributed systems design.

  • Strong experience with cloud infrastructure and related tools

  • Experience with CI/CD tools and practices.

Qualifications:

  • Bachelor’s degree in Computer Science or related field (or equivalent practical experience).

  • Experience building and shipping production applications.

  • Experience in consumer fintech preferred.

www.getcastle.com

Frequently Asked Questions

What is the salary for the Backend Software Engineer role at castle?
The listed salary for this Backend Software Engineer position at castle is USD 98K–145K/yr. This is a remote FullTime role.
Is the Backend Software Engineer job at castle remote?
Yes, this Backend Software Engineer position at castle is remote, with team members based in Harvard Square, New York City. You can work from home or anywhere in the supported regions.
Is the Backend Software Engineer role at castle full-time or part-time?
This is listed as a FullTime position. It is posted as a Backend Software Engineer role in the Engineering & Product department at castle.
Which team or department does the Backend Software Engineer at castle belong to?
This Backend Software Engineer position is part of the Engineering & Product department at castle. See the full job description for more information about the team structure and responsibilities.
How do I apply for the Backend Software Engineer position at castle?
Click the "Apply Now" button on this page. You will be redirected to castle's official application portal hosted on ashby where you can submit your application directly.
When was the Backend Software Engineer job at castle posted?
This Backend Software Engineer position at castle was posted on Jun 4, 2025. Apply as soon as possible — early applications are often reviewed first.
Backend Software Engineer
castle · 💰 USD 98K–145K/yr
Apply for this role ↗

You'll be redirected to castle's official application page on Ashby ATS.