Sr. Software Developer

Senior Software Engineer Location: Gaithersburg, MDSchedule: Full TimeWork Arrangement: OnsiteTravel Required: NoShift: DayClearance Required: Active Top Secret/SCI with the ability to successfully complete a polygraph examination Position Overview We are seeking an experienced Senior Software Engineer to support the design, development, deployment, and maintenance of mission-critical enterprise applications. This position is ideal for a hands-on developer who enjoys solving complex technical problems, building reliable software, and collaborating within an Agile engineering environment.The Senior Software Engineer will work closely with product owners, architects, Scrum Masters, DevSecOps teams, and fellow developers to deliver secure, scalable, and maintainable software solutions. Primary Responsibilities • Design, develop, test, deploy, and maintain enterprise software applications using modern development practicesDevelop clean, maintainable, and well-documented code that follows secure coding standards and engineering best practicesDesign and implement RESTful APIs, microservices, and distributed application solutionsParticipate in Agile ceremonies, including sprint planning, backlog refinement, daily stand-ups, sprint reviews, and retrospectivesCollaborate with product owners, architects, DevSecOps engineers, and development teams to deliver high-quality softwareDevelop automated unit, integration, and end-to-end tests to support application quality and reliabilityPerform code reviews and provide technical guidance to junior developersTroubleshoot complex application issues and perform root cause analysisCollaborate with DevSecOps teams to support CI/CD pipelines and automated deploymentsOptimize application performance, scalability, reliability, and securityParticipate in architecture discussions, modernization initiatives, and technical roadmap planningSupport production deployments and resolve issues within mission-critical environmentsRequired QualificationsActive Top Secret/SCI clearanceAbility to successfully complete a polygraph examinationBachelor's degree in Computer Science, Software Engineering, or a related field with 8 to 12 years of relevant experience, or a master's degree with 6 to 10 years of relevant experienceEight or more years of professional software development experienceStrong hands-on proficiency in at least one object-oriented programming language, such as Java, C#, Python, or C+• Experience developing web-based applications or enterprise software solutionsExperience designing, developing, and consuming RESTful APIsExperience working with relational databases, NoSQL databases, or bothStrong understanding of object-oriented design principles and software design patternsExperience using Git or another distributed version control systemExperience working within Agile Scrum or SAFe development environmentsStrong analytical, debugging, and problem-solving skillsStrong written and verbal communication skillsPreferred QualificationsExperience developing cloud-native applications using AWS, Azure, or another cloud platformExperience with Docker, Kubernetes, or other container technologiesExperience designing or developing microservices architecturesFamiliarity with DevSecOps practices and CI/CD tools such as Jenkins, GitLab CI, or Azure DevOpsExperience with Infrastructure as Code tools such as Terraform or AnsibleExperience with messaging technologies such as Kafka or RabbitMQExperience with React, Angular, Vue.js, or another modern front-end frameworkFamiliarity with Elasticsearch, Redis, or similar enterprise technologiesExperience following secure software development lifecycle practicesSecurity+ or another applicable DoD 8570/8140 aligned certification Work EnvironmentThis is a full-time, onsite position based in Gaithersburg, Maryland. Candidates must be able to work onsite during normal daytime business hours.System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.#M1#LI-CS1Ref: #856-Baltimore-S1System One, and its subsidiaries including Joulé, ALTA IT Services, CM Access, TPGS, and MOUNTAIN, LTD., are leaders in delivering workforce solutions and integrated services across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible full-time employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.