Software Engineer

Custom Software Systems, Inc. (CSS) is seeking a highly skilled Software Engineer to architect, build, and maintain enterprise-scale applications using modern Java technologies and event-driven design principles. This role is ideal for a technically strong engineer with hands-on experience in Spring Boot microservices, message-broker integration, and modern front-end development, who can translate complex requirements into scalable, maintainable software solutions within a secure, containerized environment.  

Responsibilities 

• Collaborate with cross-functional teams to architect, design, and implement enterprise software solutions.  

• Apply event-driven architecture principles to develop scalable, resilient, and loosely coupled applications.  

• Develop microservices using Spring Boot and associated Spring frameworks.  

• Build response and maintainable user interfaces using React.  
• Provide strong technical expertise in PrimeFaces 6.0 and above, including component usage, customization, and integration within Java Server Faces (JSF) applications.  
• Implement message queuing and event streaming using RabbitMQ.  

• When experience is based on Kafka, demonstrate understanding of architectural and operational differences between Kafka and RabbitMQ.  
• Develop message producers, consumers, routing logic, and related integration components.  
• Deploy microservices to Kubernetes clusters using automated CI/CD pipelines.  

• Monitor, diagnose, and troubleshoot production systems to ensure reliability and uptime.  
• Perform performance tuning and scalability optimization across application and infrastructure layers.  
• Write unit tests with a target of 85% or greater code coverage.  

• Participate in peer code reviews to enforce coding standards and best practices.  
• Conduct system testing, debugging, and validation activities.  
• Prepare technical specifications, architecture documentation, and design decision records.  

• Produce sequence diagrams for major use cases as part of design deliverables.  

• Collaborate with product managers, designers, and engineering teams to refine requirements and ensure alignment on deliverables.  

• Reporting Requirements (in a JIS prescribed format)  

• Submit weekly activity reports to summarize progress on assigned programs and projects.   

• Provide weekly project status reports in the JIS-prescribed format.  

• Complete weekly time reporting using JIS-provided forms, along with any additional reports requested by the supervising manager. 

• Apply event-driven architecture (EDA) principles to design scalable and resilient systems.  

• Demonstrate high-level Java competency, including strong understanding of core libraries, concurrency, collections, JVM fundamentals, and modern Java features.  

• Analyze complex technical challenges and propose effective, maintainable solutions.  

• Develop and maintain applications using PrimeFaces 6.x and above, including component customization and JSF integration.  

• Produce clean, maintainable, and testable code aligned with industry best practices.  

• Collaborate effectively within Agile or hybrid development teams.
   

Clearance 

• Must be clearable. 

Citizenship 

• US Citizenship  

Required Qualifications 

• Core Java: 8+ years of high-level competency (concurrency, JVM fundamentals, modern Java features). 

• Backend Frameworks: 4+ years of development using Spring Boot and associated frameworks. 

• Frontend Development: 4+ years building responsive interfaces utilizing React and/or Angular. 

• Messaging & Streaming: 4+ years implementing message queuing and event streaming using RabbitMQ or Kafka. 

• Must have three (3) years of experience as a software engineer. 

• Specialized Experience: At least two (2) years of experience working with Ada, SQL, or third/fourth generation languages in the design and implementation of systems. 

• One (1) year working with DBMS 

Education 

• A Bachelor's Degree from an accredited college or university with a major in Computer Science, Information Systems, Engineering, Business, or other related scientific or technical discipline, or three (3) years of equivalent experience in a related field. 

Knowledge, Skills & Abilities 

• Data & Security: Experience with RESTful APIs, secure coding principles, and both Relational/NoSQL database.     

• Infrastructure: Proficiency with Kubernetes, Docker, and CI/CD pipelines.  

• Legacy Integration: Ability to maintain applications using PrimeFaces 6.x and JSF. 

• Architecture: Knowledge of design patterns and Event-Driven Architecture (EDA). 

Preferred Qualifications 

• Modern front-end development using React and/or Angular for building responsive, component-based user interfaces.  

• Message-queuing and event-streaming technologies, including RabbitMQ or Kafka, for distributed system communication.  

• Elasticsearch for indexing, search, and analytics (preferred but not mandatory).  

• Microservices development using Spring Boot or equivalent Java frameworks.  

• Cloud platforms such as AWS, Azure, or Google Cloud for deployment, monitoring,  

• and scaling (preferred but not required).  

• DevOps and source control tools, including Git, CI/CD pipelines, and automated  

• build processes.  

• Software design patterns and architectural best practices, with the ability to apply them appropriately.  

• Containerization and orchestration techniques, including Kubernetes and Docker.  

• RESTful API design, web services, and integration patterns.  

• Relational and NoSQL databases, such as PostgreSQL, MySQL, MongoDB, or Cassandra.  

• Application performance tuning, monitoring, and observability tools (e.g., Prometheus, Grafana, ELK stack).  

• Security best practices, including authentication, authorization, and secure coding principles