ALTEN Romania, part of the international ALTEN Group - with a unique position as a Leader in IT and engineering Consulting- has supported its clients’ development strategies in innovation, R&D, and IT systems since 1996.Design, build and evolve secure, scalable and reusable Java backend services for enterprise-grade transaction processing and business-critical applications.The role focuses on designing and implementing integrations between complex enterprise systems, building resilient APIs and supporting high-volume transactional platforms. The developer will collaborate closely with solution architects, technical leads, business analysts, QA engineers and other development teams.This is a senior hands-on engineering role and does not include people-management responsibilities.Seniority & ExperienceMinimum 5 years of hands-on backend development experience with Java.Minimum 3 years of hands-on development experience with Spring Boot.Minimum 3 years of experience designing and implementing REST APIs and system-to-system integrations.Minimum 2 years of practical experience with Oracle Database and SQL; interaction with PL/SQL components is expected where relevant.Minimum 2 years of experience with messaging or event-driven solutions, preferably Apache Kafka.Minimum 2 years of experience with Docker and container orchestration platforms such as Kubernetes or OpenShift.Proven experience delivering business-critical enterprise applications through the full software delivery lifecycle.Experience in banking, financial services or another highly regulated industry is strongly preferred.Technical RequirementsBackend DevelopmentStrong Java 17+ development experience.Solid Spring Boot expertise.Experience designing and developing scalable REST APIs.Strong understanding of enterprise integration patterns.Experience working with JSON, XML and SOAP-based integrations.Experience with asynchronous and event-driven architectures.Knowledge of software design principles and clean code practices.DatabasesOracle Database experience.Strong SQL knowledge.Experience working with PL/SQL components.Understanding of database performance optimization and troubleshooting.Messaging & IntegrationHands-on experience with Apache Kafka or similar messaging platforms.Experience building and maintaining distributed systems.Understanding of synchronous and asynchronous communication patterns.Cloud-Native Delivery & DevOpsHands-on experience with Docker and Kubernetes or OpenShift.Experience with CI/CD pipelines and GitHub Actions or equivalent tooling.Experience with Gradle, Git workflows and shell scripting.Ability to troubleshoot deployment, configuration and runtime issues in non-production environments.ObservabilityWorking knowledge of structured logging, metrics, tracing and operational diagnostics.Practical exposure to at least two of the following:ELK StackOpenTelemetryPrometheusGrafanaKey ResponsibilitiesDesign, develop and maintain backend applications and services using Java 17+ and Spring Boot.Design and implement REST APIs and integrations using JSON, XML and SOAP where required.Contribute to reusable integration capabilities and avoid application-specific point-to-point solutions where a generic service is appropriate.Design and implement synchronous, asynchronous and event-driven interaction patterns based on solution needs.Integrate applications using Apache Kafka or equivalent enterprise messaging platforms.Implement authentication and authorization mechanisms using OAuth 2.0, JWT and enterprise access-management solutions.Build automated unit and component tests using JUnit, Mockito or equivalent frameworks.Participate in code reviews and contribute to clean code, security, performance and engineering-quality standards.Containerize applications and support delivery through Docker and OpenShift/Kubernetes-based platforms.Implement logging, metrics and tracing aligned with organizational observability standards.Identify and resolve scalability, reliability and performance issues during development and testing.Create and maintain technical documentation, API specifications and implementation notes.Use enterprise-approved AI tools responsibly to improve development, testing and documentation productivity while validating all generated output.Banking & Regulated Industry ExperiencePrevious delivery experience in banking, financial services, lending, customer-data, core systems or enterprise integration environments is considered a strong advantage.Understanding of security, auditability, data protection, traceability and controlled delivery practices in regulated environments.Ability to work with business-critical systems where reliability, backward compatibility and controlled change are essential.AI & Modern Engineering PracticesPractical use of Microsoft Copilot or another enterprise-approved generative AI assistant for code exploration, test generation, documentation, refactoring support or troubleshooting.Ability to review and validate AI-generated code for correctness, security, maintainability and alignment with internal standards.Awareness of confidentiality, data-classification and safe-use constraints when working with AI tools.Professional CompetenciesStrong analytical thinking and structured problem solving.High level of autonomy, ownership and delivery discipline.Ability to communicate technical decisions clearly to architects, analysts, QA engineers and peer developers.Constructive collaboration in Agile, cross-team and multi-system delivery environments.Ability to challenge unclear or inefficient solutions and propose sustainable alternatives.Commitment to continuous learning, engineering quality and reusable solutions. 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