Software Engineer, Backend Developer

Castle is the all-in-one payment platform 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 savings opportunities, and provides end-to-end support to claim tax credits and rebates for any eligible expenses. The average Castle customer saves more than $10k on their home.
• Realtors, property managers, and home service professionals work with Castle to deliver the next level of premium service to their customers. Castle’s on‑call concierge assists homeowners with all of their home finance questions and needs (from account set‑up to tax credit eligibility), making homeowners happier and saving home service professionals time to focus on their core business.
• Castle’s founding team helped build and sell the largest AI company (at the time of exit) to S&P Global in 2018; graduated from Harvard and MIT, and renovated six homes during the Covid-19 pandemic. Castle’s founding investors have backed companies like Airbnb, Dropbox, Facebook, Pinterest and Venmo.

You will be responsible for building out the APIs and pipelines that power the bill pay app as well as the systems that will power our card product. You will work closely with the founders and engineering team to ensure we have a robust application and associated data systems on top of which we can build out our finance platform.

• Industry expertise working on APIs and data systems
• Expertise in API design
• Expertise in distributed systems and system design

• Expertise in Django and/or data pipelines
• Experience with infrastructure, Postgres, and/or frontend/mobile development
• Experience in fintech
• Experience mentoring engineers or leading teams/orgs