{"schemaVersion":"jobsearcher.job.v1","id":"7a2cf91f229723cc59893ae9","url":"https://jobsearcher.com/jobs/7a2cf91f229723cc59893ae9","canonicalUrl":"https://jobsearcher.com/jobs/7a2cf91f229723cc59893ae9","title":"Full Stack Software Engineer – Mid","description":"Job Type: Full- Time\n\nWorkplace Type: Onsite\n\nClearance: TS/SCI willingness to take a polygraph exam\n\nMust be a U.S. Citizen\n\nJob Summary\n\nSystems is seeking a Mid-Level Full Stack Software Engineer with the skills needed to develop, integrate, test, and maintain software capabilities from requirements through production delivery. You’ll work across the technology stack and collaborate with other engineers, architects, product owners, and mission stakeholders to translate requirements into reliable and maintainable software solutions.\n\nRoles and Responsibilities\n\nA qualified candidate will perform the following duties and responsibilities, but are not limited to:\n\nUse modern development tools, frameworks, and cloud technologies to solve challenging technical and mission problems.\nDevelop backend services, APIs, data integrations, and user-facing capabilities while working within established application architectures and engineering standards.\nParticipate in technical design discussions, troubleshoot application issues, conduct code reviews, and contribute to improvements in software quality and maintainability.\nWork alongside senior engineers to evaluate technical approaches, learn new tools and technologies, and continuously improve the team's development and delivery practices.\n\nRequired Qualifications\n\nBachelor's degree in Computer Science, Engineering, Information Technology, or a related technical field, or additional software engineering experience in lieu of a degree.\n4+ years of experience in software engineering, including developing, testing, integrating, or maintaining software applications.\n3+ years of experience developing applications using Python, Java, or another object-oriented programming language.\n2+ years of experience developing web applications using frontend technologies or frameworks, such as React or Angular.\nExperience developing or integrating backend services and RESTful APIs.\nExperience developing applications using relational databases, such as PostgreSQL, and working with SQL.\nExperience working within Agile software development environments using methodologies such as Scrum or Kanban.\nExperience using software development and task management tools, such as Jira.\nTS/SCI clearance with a polygraph.\n\nPreferred Qualifications\n\nExperience developing production applications with Python.\nExperience developing enterprise web applications.\nExperience with microservices, distributed systems, or event-driven architectures.\nExperience with AWS cloud-native or serverless application development.\nExperience with Infrastructure as Code technologies such as CloudFormation.\nExperience building or maintaining CI/CD pipelines (Gitlab, Github Actions, Jenkins).\nExperience with Kubernetes or other container orchestration technologies.\nExperience with automated unit, integration, or end-to-end testing.\nExperience with application authentication, authorization, logging, monitoring, or observability.\nExperience working in DevSecOps software delivery environments.\n\nPhysical Requirements/Work Environment\n\nNormal office environment.\n\nTravel\n\nAs required\n\nCompany Description\n\nCastalia Systems is a proven business partner providing mission critical solutions to the Federal Government. We provide cutting edge solutions from Securing and Managing Data to Systems Engineering and Development. Castalia Systems is a pioneer in Artificial Intelligence Design and Application.\n\nWith our vast knowledge of our customers’ needs and relevant technology, our team is able to bring successful solutions to every mission. We are one-upping our competitors by providing premium IT solutions and platforms with cutting-edge technology so it’s so evident when you compare us with anyone.\n\nCompensation\n\nAt Castalia Systems, we provide you with opportunities and choices and support your total well-being. Our benefits include: Medical, dental, vision coverage, 401k matching, generous PTO, paid holidays, professional training opportunities, and even pet insurance to ensure your furry friends are cared for too. All regularly scheduled employees working at least 30 hours per week are eligible to participate in Castalia Systems’ benefit programs. Individuals that do not meet the threshold are only eligible for select offerings, not inclusive of health benefits.\n\nSalary at Castalia Systems is determined by various factors, including but not limited to location, position knowledge, skills, competencies, and experience, as well as contract-specific affordability and organizational requirements. The projected compensation range for this position is $95,000.00 to $100,000.00 (annualized USD). The estimate displayed represents the typical salary range for this position and is just one component of Castalia Systems’ total compensation package for employees.\n\nDisclaimer\n\nCastalia Systems is an equal employment opportunity and affirmative action employer and strives to comply with all applicable laws prohibiting discrimination based on race, color, creed, sex, sexual orientation, age, national origin, or ancestry, physical or mental disability, veteran status, marital status, HIV-positive status, as well as any other category protected by federal, state, or local laws. All such discrimination is unlawful, and all persons involved in the operations of the company are prohibited from engaging in this type of conduct.","company":"Castalia Systems","rawCompany":"castalia systems","city":"Washington","state":"DC","isRemote":false,"isActive":false,"createdAt":"2026-10-02T12:11:46.600Z","occupations":[{"code":"15-1252.00","title":"Software Developers","slug":"software-developers"},{"code":"15-1299.08","title":"Computer Systems Engineers/Architects","slug":"computer-systems-engineers-architects"},{"code":"15-1211.00","title":"Computer Systems Analysts","slug":"computer-systems-analysts"}],"industries":[{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"},{"code":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"},{"code":"513210","title":"Software Publishers","slug":"software-publishers"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Full Stack Software Engineer – Mid","description":"Job Type: Full- Time\n\nWorkplace Type: Onsite\n\nClearance: TS/SCI willingness to take a polygraph exam\n\nMust be a U.S. Citizen\n\nJob Summary\n\nSystems is seeking a Mid-Level Full Stack Software Engineer with the skills needed to develop, integrate, test, and maintain software capabilities from requirements through production delivery. You’ll work across the technology stack and collaborate with other engineers, architects, product owners, and mission stakeholders to translate requirements into reliable and maintainable software solutions.\n\nRoles and Responsibilities\n\nA qualified candidate will perform the following duties and responsibilities, but are not limited to:\n\nUse modern development tools, frameworks, and cloud technologies to solve challenging technical and mission problems.\nDevelop backend services, APIs, data integrations, and user-facing capabilities while working within established application architectures and engineering standards.\nParticipate in technical design discussions, troubleshoot application issues, conduct code reviews, and contribute to improvements in software quality and maintainability.\nWork alongside senior engineers to evaluate technical approaches, learn new tools and technologies, and continuously improve the team's development and delivery practices.\n\nRequired Qualifications\n\nBachelor's degree in Computer Science, Engineering, Information Technology, or a related technical field, or additional software engineering experience in lieu of a degree.\n4+ years of experience in software engineering, including developing, testing, integrating, or maintaining software applications.\n3+ years of experience developing applications using Python, Java, or another object-oriented programming language.\n2+ years of experience developing web applications using frontend technologies or frameworks, such as React or Angular.\nExperience developing or integrating backend services and RESTful APIs.\nExperience developing applications using relational databases, such as PostgreSQL, and working with SQL.\nExperience working within Agile software development environments using methodologies such as Scrum or Kanban.\nExperience using software development and task management tools, such as Jira.\nTS/SCI clearance with a polygraph.\n\nPreferred Qualifications\n\nExperience developing production applications with Python.\nExperience developing enterprise web applications.\nExperience with microservices, distributed systems, or event-driven architectures.\nExperience with AWS cloud-native or serverless application development.\nExperience with Infrastructure as Code technologies such as CloudFormation.\nExperience building or maintaining CI/CD pipelines (Gitlab, Github Actions, Jenkins).\nExperience with Kubernetes or other container orchestration technologies.\nExperience with automated unit, integration, or end-to-end testing.\nExperience with application authentication, authorization, logging, monitoring, or observability.\nExperience working in DevSecOps software delivery environments.\n\nPhysical Requirements/Work Environment\n\nNormal office environment.\n\nTravel\n\nAs required\n\nCompany Description\n\nCastalia Systems is a proven business partner providing mission critical solutions to the Federal Government. We provide cutting edge solutions from Securing and Managing Data to Systems Engineering and Development. Castalia Systems is a pioneer in Artificial Intelligence Design and Application.\n\nWith our vast knowledge of our customers’ needs and relevant technology, our team is able to bring successful solutions to every mission. We are one-upping our competitors by providing premium IT solutions and platforms with cutting-edge technology so it’s so evident when you compare us with anyone.\n\nCompensation\n\nAt Castalia Systems, we provide you with opportunities and choices and support your total well-being. Our benefits include: Medical, dental, vision coverage, 401k matching, generous PTO, paid holidays, professional training opportunities, and even pet insurance to ensure your furry friends are cared for too. All regularly scheduled employees working at least 30 hours per week are eligible to participate in Castalia Systems’ benefit programs. Individuals that do not meet the threshold are only eligible for select offerings, not inclusive of health benefits.\n\nSalary at Castalia Systems is determined by various factors, including but not limited to location, position knowledge, skills, competencies, and experience, as well as contract-specific affordability and organizational requirements. The projected compensation range for this position is $95,000.00 to $100,000.00 (annualized USD). The estimate displayed represents the typical salary range for this position and is just one component of Castalia Systems’ total compensation package for employees.\n\nDisclaimer\n\nCastalia Systems is an equal employment opportunity and affirmative action employer and strives to comply with all applicable laws prohibiting discrimination based on race, color, creed, sex, sexual orientation, age, national origin, or ancestry, physical or mental disability, veteran status, marital status, HIV-positive status, as well as any other category protected by federal, state, or local laws. All such discrimination is unlawful, and all persons involved in the operations of the company are prohibited from engaging in this type of conduct.","datePosted":"2026-10-02T12:11:46.600Z","dateModified":"2026-10-02T12:11:46.600Z","hiringOrganization":{"@type":"Organization","name":"Castalia Systems","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Washington","addressRegion":"DC","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"7a2cf91f229723cc59893ae9"},"url":"https://jobsearcher.com/jobs/7a2cf91f229723cc59893ae9"}}