Backend Integrations Engineer

At Citadel API

USA Only

The Company you'll Join

At Citadel, our mission is to make verifications easy for everyone.

We think it's crazy that it can take 5 to 7 days to verify someone's employment or income. Alternatives are even worse, an API call should not cost $40.

When Citadel succeeds, we'll save billions of dollars for companies and billions of hours for people who're still filling out forms and uploading paystubs.

Imagine applying for a loan or verifying your job history with a click of a button. That's what Citadel is empowering.

The Team You'll Work With

We're a small but mighty team of engineers, product managers, and business folks who built and launched products at Apple, Uber, Facebook, Carta, Venmo, Telegram, and Plaid. We're well funded by US-based top VC funds.

We like to nerd out about using the cutting-edge tech and building frictionless user experiences. We love crafting great products and see our users delighted by what we build.

We're a distributed team with no plans to start an office anytime soon. We don't really care where you are, but we care a lot about who you are. If you like solving customer pain points, helping your team members excel at what they do, being part of a community, and care about quality, you'll fit in.

What You'll Do

  • Reverse engineer and build integrations with external APIs and services
  • Use best programming practices to optimize code performance
  • Write and maintain unit and integration tests

About You

  • Strong knowledge of Python
  • Strong background in network protocols (TCP/IP, HTTP, HTTPS)
  • Minimum 2 years of experience.


  • Experience with Django, PostgreSQL
  • Experience with website scraping using Selenium, Puppeteer, lxml
  • Experience with reverse engineering of mobile applications
  • Experience with reverse engineering of non public APIs
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