Salary: £60,000 - 90,000 per year Requirements: Proven expertise as an Elastic Search SME, with a deep understanding of its architecture and capabilities Extensive experience working with data systems, from collection to analysis Strong programming skills in Java, Python, and SQL Familiarity with data processing tools such as LakeFS and Apache Spark (desirable) Ability to work effectively in a collaborative environment, with excellent problem-solving skills Must have a minimum of 5 years of unbroken UK residency and hold SC security clearance Responsibilities: Designing, developing, and maintaining systems and infrastructure to manage extensive data sets Integrating data from diverse sources to enable effective analysis and insights Working with data throughout its lifecycle, ensuring data quality and accessibility Collaborating with cross-functional teams to optimise data workflows and performance Utilising programming languages such as Java, Python, and SQL, alongside tools like LakeFS and Apache Spark, to process and manage data efficiently Technologies: Java Python SQL Security Spark More: We are a reputable organisation based in Croydon, seeking a talented Senior Java Developer with strong Elastic Search expertise to join our project. This is an exciting opportunity to work on a high-profile project that involves handling large volumes of data across its lifecycle. Our team is forward-thinking and committed to delivering impactful solutions. The role is a 1-year contract requiring onsite presence once a week, with a daily rate of up to £616, subject to experience and security clearance. last updated 13 week of 2026