Summary: This remote Senior Backend Engineer role involves building secure, resilient, and scalable backend systems in a cloud-native environment within the cyber security domain. Highlights: 1. Work with an international team on cutting-edge cyber security projects. 2. Develop secure, resilient, and scalable backend systems in AWS. 3. Utilize modern Java (version 21) and the Spring ecosystem. ### **Job Information** Date Opened 27/01/2026 Job Type Full time Remote Job Industry IT Services ### **Job Description** This is a remote position. **We are looking for a Senior Backend Engineer** to join an international team working with a leading client in the **cyber security domain**, based in Luxembourg. This role focuses on building secure, resilient, and scalable backend systems in a cloud\-native environment, while collaborating closely with multidisciplinary teams across engineering, data, and operations. ### **Responsibilities:** **Backend Engineering** * Design, build, and evolve server\-side components using **modern Java (version 21\)** and the **Spring ecosystem**. * Apply the most appropriate data access strategies, from ORM\-based approaches to lower\-level database interactions, depending on the use case. * Ensure efficient and secure interaction with **relational databases** such as **Oracle** and **cloud\-based PostgreSQL**, following sound software design principles. * Deliver backend solutions with a strong focus on **security, resilience, performance, and maintainability**, aligned with cyber security best practices. **Cloud Platforms \& Delivery** * Contribute to the deployment and operation of applications in an **AWS environment**, using both **container\-based** and **serverless** services. * Define and maintain **cloud infrastructure as code**, ensuring consistency, repeatability, and reliability across environments. * Actively participate in automation, CI/CD pipelines, and delivery workflows. **Python \& Multi\-Stack Contributions** * Participate in the development of **Python components** when needed, supporting automation, integrations, or data\-related use cases. * Collaborate closely with data\-oriented teams to enable smooth data flows, transformations, and interoperability between platforms. ### **Requirements:** * Higher education in **Software Engineering, Computer Science**, or a related technical field. * Strong background in **Java backend development**, including deep experience with the **Spring framework**. * Solid experience working with **relational databases**. * Hands\-on experience designing, deploying, and operating workloads on **AWS cloud services**. * Comfortable using **Python** for scripting, services, or system integrations. * Practical experience with **Infrastructure as Code**, particularly **Terraform**. * Good understanding of **API design**, **distributed systems**, and **application security**. * Daily use of source control platforms such as **GitHub or GitLab**. * Previous collaboration with **data engineering or analytics teams**. * Familiarity with **automated build and deployment processes**. * Understanding of **container technologies** and orchestration platforms. * Experience working in **iterative delivery frameworks** and using project tracking tools. * Knowledge of **observability, logging, and alerting** solutions. * **Fluency in English** is required; additional languages are a plus. ### **Nice\-to\-have:** * Exposure to **artificial intelligence tools or ecosystems**. * **Cloud certifications** (AWS or equivalent). * Experience in **cyber security–focused environments** or regulated industries. If this sounds like you, share your CV with us and let’s talk!