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Castle

Backend Software Engineer

Cambridge, Massachusetts, United States +1

Location
Cambridge, Massachusetts, United States · New York, United States
Work
Hybrid
Employment
Full-time
Level
Not stated
Function
Engineering
Pay
$98K – $145K a year
Posted
17 months ago

Pay and the market here

The top of this role’s range, $145K a year, is 33% below the median of $215K for engineering jobs in Cambridge (middle half $176K – $256K, 149 jobs that state pay).

200 engineering jobs open in Cambridge: 4% remote, 54 posted in the last 30 days.

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About the 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

Source

Posted by Castle on their own hiring page, jobs.ashbyhq.com. OptiTalent shows it as published, read 07 Nov 2026 12:32 UTC; the original is the reference.

View the original ad ↗

More at Castle

  • Software Engineer

    31 months ago

    Castle · Cambridge, Massachusetts, United States +2

    HybridFull-time$98K – $145K a yearEngineering

    Building and maintaining:; A robust, scalable, and secure financial platform;; Web and mobile applications that help homeowners track, understand, and pay for their home expenses;; AI-powered data pipelines that transform customer data into insights, including finding savings…