Senior Principal Software Engineer – Core Banking Platform

Company: FIS
Apply for the Senior Principal Software Engineer – Core Banking Platform
Location: London
Job Description:

FIS in London, within a newly acquired startup building an AI-enabled, autonomous banking platform for Tier-1 institutions, seeks a senior engineer to own core banking services from design to production. You will design APIs, ensure correctness, scale distributed systems, and lead incident response with observability and reliable deployments.

This role offers startup autonomy within a global enterprise. Strong Go or equivalent language experience, event-driven architectures, and a practical bias

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Posted: September 25th, 2026