Software Engineer (Staff) – Python – FinTech

Company: Atarus
Apply for the Software Engineer (Staff) – Python – FinTech
Location: London
Job Description:

Staff Software Engineer – Identity & Security

Competitive Salary + Bonus

We’re partnered with a fast-growing FinTech building a global financial platform, looking for a Staff Software Engineer to help shape the next generation of identity and access management across the business.

This is a high-impact role with significant ownership, working on business-critical systems used across a global platform.

What You’ll Be Doing

  • Designing and building large-scale Identity & Access Management (IAM) systems
  • Developing authentication, authorisation, and access control services
  • Driving architecture and technical direction across critical platform services
  • Collaborating with product and engineering teams to deliver secure, scalable solutions
  • Improving engineering standards, testing, and CI/CD practices
  • Mentoring engineers and helping shape technical best practices

What They’re Looking For

  • Strong software engineering background (7+ years)
  • Experience building IAM, authentication, or authorisation platforms
  • Strong programming skills in Python, Java, Go, or similar
  • Experience designing distributed systems and scalable backend services
  • Background within FinTech or financial services
  • Engineers who enjoy owning complex technical problems end-to-end
  • High-impact Staff Engineer role with significant technical ownership
  • Opportunity to shape a critical platform used globally
  • Complex engineering challenges around security and identity
  • Strong engineering culture with clear progression opportunities
  • Fast-growing FinTech with global reach

If you’re passionate about backend engineering, platform security, and building scalable identity systems, this is well worth a conversation.

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Posted: July 13th, 2026