39 backend engineer java jobs at 29 companies in Hanover, PA
🚀PromotedHiringCafe
Founding Backend / Infra Engineer
Cupertino, CA, US
$160k-$300k/yrOn-SiteFull Time
HiringCafe: Building a 100× better job search engine to take on Indeed and LinkedIn.
Own the crawlers, pipelines, and infrastructure powering a real-time job search engine. Strong Node.js and Python fundamentals; bonus points for security and reverse-engineering chops.
teKnoluxion: Providing technical engineering and cloud services to the intelligence community.
6+ YOEActive Top Secret/SCI clearance with CI poly eligibility; bachelor’s (required) or master’s in CS or related; 6+ years experience (varies by degree); strong Java or Python, SQL, REST API, Linux skills.
Titan Technologies: Provides IT solutions and services to government agencies.
7+ YOESeven years of software development experience; DoD TS/SCI preferred; 5+ years with multiple tech including Python, Java, Docker, OpenStack, Ansible, Terraform, Kubernetes; backend/REST API focus; CI/CD and DevSecOps.
Legato: Delivers IT engineering and cybersecurity services to defense agencies.
14+ YOETS/SCI with Polygraph, 14+ years software engineering experience, proficiency in Java/C++/Python, AWS, Git, PostgreSQL/SQL, Jira/Confluence, Agile, testing, and technical documentation; bachelor's degree or 5 additional years experience.
Ad Hoc: Builds user-centered digital services and platforms for government agencies.
8+ YOE8+ years software engineering experience (or equivalent), strong Java and Spring Boot backend skills, RESTful API and microservices experience, relational DB experience, Git and CI/CD familiarity, US citizenship and DHS Public Trust eligibility.
BigBear.aiNYSE: BBAI: AI-powered decision intelligence for complex mission environments.
3+ YOE3+ years software engineering with a technical Bachelor's (or 7+ years experience), strong Java and Spring Boot skills, MongoDB or similar DB experience, and automated testing experience; active TS/SCI with poly required.
Java, Spring Boot, MongoDB, Apache Kafka, Linux, Vue.js
Captivation Software: Provides specialized software engineering for the intelligence and defense communities.
7+ YOEMust hold Top Secret/SCI with favorable Polygraph, 7+ years SWE experience, bachelor’s in CS or related (or 4 years substitution), experience with Spring Boot/Java, AWS, Terraform/CloudFormation, CI/CD, monitoring and testing.
Palo Alto or Falls Church or Frisco or Washington or Baltimore or Dallas or Bethesda or Fort Worth
$110k-$230k/yrHybridFull Time
GEICO: Provides vehicle and property insurance services to consumers.
8+ YOE8+ years software development experience with large-scale systems; proficiency in Java/Kotlin/Golang, SQL/NoSQL, Kafka, Spark, Airflow, cloud and DevOps practices; strong communication and system design skills.
Senior Java Developer (Active TS/SCI with Poly Required - (SIGN-ON BONUS UP TO $30,000)
Annapolis Junction, Maryland, United States
$164k-$207k/yrOnsiteFull Time
GDITNYSE: GD: Delivers IT and mission services to government agencies.
5+ YOEActive TS/SCI with poly; Bachelor's in a technical field; 5+ years software development; 4+ years Java; microservices, Spring, Docker, Kubernetes; strong backend architecture.
Java, Kotlin, Spring Boot, Spring Cloud, Spring Data, AWS, Docker, Kubernetes, Linux, Kafka, Cassandra, DynamoDB, GitLab CI/CD, Maven, Node.js, SonarQube, IntelliJ, VSCode, ReactJS
Ultimate Knowledge: Provides cybersecurity training and workforce readiness assessment solutions.
5+ YOE5+ years backend/platform software engineering, Kubernetes production experience, GitOps (ArgoCD/Flux), Terraform/Helm/Kustomize, troubleshooting distributed systems, cloud (AWS) and scripting (Bash/Python); active DoD Secret clearance required.
Bestgate Engineering: Software and systems engineering firm for government clients.
Strong Java backend experience (Spring/Guava), API and microservice design, applied AI familiarity (prompt engineering, RAG), Git/Maven/Linux workflows, and eligibility for U.S. government security clearance.
Java, Spring, Guava, Model Context Protocol (MCP), Retrieval-Augmented Generation, LangChain4j, LangChain, LlamaIndex, Git, Nexus, Maven, Linux, Spring AI, vector databases, NiFi, Kafka, AWS, Kubernetes, SQL, NoSQL, Python, Big Data
SMX: Providing cloud, cybersecurity, and mission-focused technology solutions to government.
4+ YOEBachelor's degree, 4+ years data engineering/backend experience, Secret clearance, proficiency in Python, SQL, Java, cloud data warehouses, distributed computing and data integration platforms.
Markon Solutions: Provides professional program and engineering services to federal agencies.
7+ YOEActive TS/SCI with polygraph, Bachelor’s degree, 7+ years software engineering experience, Java and backend development, RESTful APIs, Agile, Git, Jira, Confluence, IntelliJ or Eclipse, strong troubleshooting and communication skills.
Java, Git, Jira, Confluence, IntelliJ IDEA, Eclipse IDE
RealmOne: Provides advanced technology services for national security agencies.
14+ YOE14 years software engineering experience (or BS + experience substitution), bachelor’s in computer science or related (or 4 years extra SWE experience), active security clearance with polygraph, experience with Java, web frameworks, containers, Linux, Git, and backend/frontend development.
Vibrint: Provides mission-critical systems and data analysis for national security.
Experience with backend or cloud-native development (Java, Python, C++, Go), containerization (Kubernetes, Docker), AWS, CI/CD, and distributed systems; active TS/SCI with polygraph and U.S. citizenship required.
Java, Python, C++, Go, Spring Boot, REST APIs, AWS, Kubernetes, Docker, Terraform, SQL, NoSQL, Elasticsearch/OpenSearch, Git, Linux, CI/CD, AI/ML, Big data frameworks
ExistX: Transitions national security research into operational software and systems.
5+ YOE5+ years enterprise software development; BS in Computer Science or related field; backend languages Java/C/C++/Rust/Python; experience with scalable systems; strong documentation; cryptography or cloud knowledge preferred.
Tria Federal: Provides digital transformation and technology services to federal agencies.
4+ YOEU.S.-based QA engineer with 3–5+ years testing enterprise applications, automation experience (Playwright/Selenium/Cypress), API and frontend/backend testing, Java/Spring, SQL, AWS knowledge, and ability to obtain Public Trust clearance.
United States or Harrisburg or California or Colorado or Illinois or Minnesota or New Jersey or New York or Oregon or Washington
$85k-$117k/yrRemoteFull Time
Syms Strategic Group: Provides IT and professional services to federal government agencies.
8+ YOE8+ years building backend services and RESTful APIs in Java and/or NodeJS, Angular front-end experience, cloud (AWS/Azure) experience, Git/GitHub, unit/integration testing, Agile/JIRA, and U.S. citizenship eligible for Public Trust.
Java, NodeJS, Angular, C#, .Net, AWS, Azure, API Gateway, Lambda, S3, CloudWatch, Git, GitHub, JUnit, Jest, JIRA, Docker, ECS, EKS, Electronic Data Interchange (EDI), XML, JSON, Microsoft Teams