https://jobs.co.uk/job/senior-kotlin-engineer-xp-gcp-investment-banking-london-salt-search--887476bb-f015-4279-988f-27547161595b RSS feed for Senior Kotlin Engineer (XP, GCP) - Investment Banking - London at Salt Search. en-gb Mon, 01 Jun 2026 16:01:57 GMT https://jobs.co.uk/job/senior-kotlin-engineer-xp-gcp-investment-banking-london-salt-search--887476bb-f015-4279-988f-27547161595b https://jobs.co.uk/job/senior-kotlin-engineer-xp-gcp-investment-banking-london-salt-search--887476bb-f015-4279-988f-27547161595b Mon, 01 Jun 2026 11:51:54 GMT Location: London | Salary: 500.00-500.00 Daily | Type: Contract | Senior Kotlin Engineer (XP, GCP) - Investment Banking - London/HybridDaily rate: £600 - £800 (inside IR35) Duration: 6 months Start: ASAPMy client is looking for an experienced Senior Kotlin engineer to support and extend a cloud-hosted platform used for bookbuilding issuances within Investment Banking Capital Markets. You will join a high-calibre London-based front office engineering team working on a next-generation issuance platform replacing a legacy bookbuilding system.This is a hands-on engineering role with a strong emphasis on Extreme Programming (XP) practices, including mob programming, test-driven development, and continuous refactoring. Engineers are expected to contribute across development, integration, and production support, collaborating closely to maintain high standards of code quality, system reliability, and performance.Required and Desirable SkillsStrong commercial experience building backend services using KotlinExperience with event-sourced and event-driven architecturesDeep familiarity with XP practices, including:Mob programming as a primary way of workingTest-driven development (TDD)Continuous refactoring and clean code principlesCloud experience with GCP... Contract