Principal Engineer

Principal Engineer : £950 Inside IR35 : Hybrid London (3x per week) : Banking client A major UK bank is seeking a Principal Engineer to lead technical delivery on a major transformation project to rebuild the payment system, replacing their existing enterprise solution. The new product will support a broad range of payment methods and channels across both in-person and digital environments. This is a senior, hands-on leadership role, owning key technical decisions and setting the standard for engineering practice across the team. Key requirements:

• Specific domain expertise in payment gateway systems
• Deep, demonstrable expertise in Kotlin
• Proven solution architecture and design ownership at scale
• Taking ambiguous, high level requirements and shaping them into structured, actionable backlogs
• Track record leading and mentoring engineering teams
• Confidence challenging technical direction and driving best practice across the wider team Key details:
• Up to £950 per day Inside IR35
• 3 days onsite per week (London)
• 6 months initial term (subject to extension) Apply now or reach out directly to find out more. Due to the high volume of applications, not all applicants will receive feedback. Principal Engineer : £950 Inside IR35 : Hybrid London (3x per week) : Banking client Unfortunately, due to the high volume of applications, not everyone will be able to receive detailed feedback.