On behalf of a partner company, Nordic Investin is looking for a Senior Java Platform Engineer. Large Java platforms become interesting when correctness, latency and changeability must all improve at once. You will work on the core domain, reduce structural friction and help teams move from tightly coupled releases toward clearer services and safer delivery. Technical choices are expected to be explained in terms of maintainability, reliability and the people who use the product. Decisions should be recorded clearly enough that another engineer can understand the tradeoff months later. As a senior colleague, you will own substantial outcomes and help others make stronger decisions. You are expected to recognise risk early, communicate it without drama and move work forward with practical alternatives. What you will do

Design and implement Java services using Spring Boot and proven integration patterns. Refactor legacy modules without disrupting critical business flows. Improve API contracts, test coverage and deployment confidence. Analyse performance bottlenecks across code, database and messaging layers. Contribute to platform standards and pragmatic architecture decisions. Support engineers through reviews, pairing and production troubleshooting. What you will bring

At least seven years of professional Java development. Experience with automated testing and modern delivery pipelines. Ability to reason about legacy constraints and incremental migration. Experience that would add value

Kubernetes and public cloud experience. Domain driven design in a complex business domain. Work in payments, insurance, retail or logistics. A background that can succeed here

You may have grown through product engineering, enterprise integration or high volume transaction systems. What matters is that you can recognise when to modernise, when to stabilise and how to do both without turning architecture into theatre. What makes the opportunity interesting

The role offers visible technical ownership and a platform with enough history to make your judgement valuable. You will help create a system that is easier to operate and easier for the next team to change. Nordic Investin will make sure you understand the context, expectations and decision path before you are asked to commit significant time. You do not need every optional technology if your core experience transfers and you can explain how you would close the gap. Nordic Investin welcomes candidates with different routes into technology and assesses applicants on relevant capability, judgement and potential.