Software Engineer

Custom Software Systems Inc. • Annapolis, MD

7h

About The Position

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.

Requirements

• Must be clearable.
• US Citizenship Required
• 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
• 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.
• 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).

Nice To Haves

• 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 ).
• 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

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.
• 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.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level