Senior Kotlin/Scala Engineer

Senior Scala / Kotlin Engineer 6-12 months Hybrid - London (2-3 days per week on site) Paying up to £600 per day (Inside IR35) Overview We are supporting a global tier 1 bank on the hire of a Scala / Kotlin Engineer to join a high-performing engineering team delivering business-critical systems. This is a hands-on engineering role focused on building and evolving distributed backend systems in a high-performance environment. You will be working on a distributed calculation engine used for complex index-level computations based on quantitative models. Distributed, manager-worker architecture Built using Scala and Python components High requirements around: o Performance o Accuracy o Security This is a feature development role, not BAU/support, with significant scope to influence system design and evolution. Role Responsibilities Design, build, and evolve core distributed services Deliver high-quality code with strong test coverage and reliability Contribute to secure system design and implementation Work closely with engineers and stakeholders to define solutions Participate in code reviews and technical design discussions Own delivery of complex features end-to-end Core Requirements Strong experience as a senior backend engineer Proven hands-on experience with: o Scala OR Kotlin (either is acceptable) Strong understanding of: o Type systems o Concurrency o Functional and/or object-oriented programming Experience building distributed backend systems Strong engineering practices: o Clean code o Testing (unit + integration) o CI/CD Tech Environment Scala / Kotlin Python (supporting components) Distributed systems architecture CI/CD and modern engineering practices Profile Strong hands-on engineer Comfortable working in small, high-performing teams Able to own delivery independently Experience in financial services or other complex domains beneficial Disclaimer: This vacancy is being advertised by either Advanced Resource Managers Limited, Advanced Resource Managers IT Limited or Advanced Resource Managers Engineering Limited ("ARM"). ARM is a specialist talent acquisition and management consultancy. We provide technical contingency recruitment and a portfolio of more complex resource solutions. Our specialist recruitment divisions cover the entire technical arena, including some of the most economically and strategically important industries in the UK and the world today. We will never send your CV without your permission. Where the role is marked as Outside IR35 in the advertisement this is subject to receipt of a final Status Determination Statement from the end Client and may be subject to change