Systems Integration Engineer - Linux

Oxigent; Barcelona; Hybrid; EUR 55,000 - 85,000; Full time

Job summary

Oxigent is seeking an experienced Software Engineer to design and build scalable microservice-based applications using Java Springboot, with a focus on airline reservation and digital journeys in a hybrid work environment. You will develop robust data access layers with MongoDB, implement secure coding practices, and collaborate across product, architecture and platform teams to deliver reliable services.

The role requires strong cloud-ready capabilities, performance tuning, and active

Responsibilities

• Design robust microservice applications using Java Springboot to deliver secure, scalable services for enterprise workflows.
• Develop and optimize data access layers using MongoDB for efficient querying, indexing and schema design.
• Implement clean modular Java code following best practices and secure development guidelines.
• Collaborate with product owners and architects in a hybrid model to translate requirements into service and data contracts.
• Integrate microservices with internal and external systems via APIs, ensuring resilience and observability.
• Configure Spring Boot properties, security, and dependencies for consistent deployments.
• Conduct unit, integration, and regression testing for Java/Spring Boot and MongoDB components.
• Participate in code reviews to share knowledge and improve architectures.
• Analyze metrics and logs to troubleshoot microservices and MongoDB issues and reduce downtime.
• Contribute to performance tuning and caching strategies to meet response time goals.
• Support deployment pipelines with DevOps to ensure consistent packaging and releases.
• Apply airline domain knowledge to streamline travel journeys and improve customer satisfaction.
• Document designs, data models, and service interfaces to aid cross-team understanding and maintenance.

Job description

Software Engineer

**Job Summary**
This hybrid role is for an experienced software engineer with strong expertise in Java Springboot, microservices and Mongo DB building scalable services for enterprise systems in an international environment. The engineer will design develop and optimize cloud ready microservice solutions that enhance reliability performance and customer experience with potential focus on airline domain platforms and digital journeys while collaborating with cross functional teams in a day shi
**Responsibilities**
+ Design robust microservice based applications using Java Springboot and Springboot microservices to deliver secure scalable and high performing services that support critical enterprise workflows and customer facing channels
+ Develop and optimize data access layers using Mongo DB to ensure efficient querying indexing and schema design that improve application responsiveness and reliability across complex data sets
+ Implement clean modular and reusable code in Java adhering to best practices coding standards and secure development guidelines to support long term maintainability and ease of enhancement
+ Collaborate with product owners architects and platform engineers in a hybrid work model to refine technical requirements and translate business needs into well defined service and data contracts
+ Integrate microservices with internal and external systems through well structured APIs while ensuring resilience observability and smooth communication across distributed components
+ Configure and maintain Springboot application properties security mechanisms and dependency management to ensure consistent behavior across environments and stable deployments for day shift operations
+ Conduct comprehensive unit integration and regression testing for Java Springboot and Mongo DB components to identify defects early and maintain high quality releases that reduce production incidents
+ Participate in code reviews and technical discussions to share knowledge address design risks and drive continuous improvement across microservice architectures and data persistence strategies
+ Analyze production metrics and logs to troubleshoot issues in microservices and Mongo DB interactions then implement corrective actions that reduce downtime and improve user experience for global customers
+ Contribute to performance tuning activities by profiling Java Springboot services optimizing database queries and refining caching strategies to meet stringent response time and scalability goals
+ Support deployment pipelines by collaborating with DevOps teams to ensure microservices are packaged configured and released consistently across test and production environments without impacting day shift stability
+ Apply domain understanding of airline reservation check in and operations flows when available to build features that streamline travel journeys reduce operational friction and increase customer satisfaction
+ Document technical designs data models and service interfaces in a clear and structured manner so teams across the multinational organization can easily understand maintain and