Top Java Developer Jobs in Baltimore, MD

Lead development of scalable Java backend applications and high-availability cloud services. Design architectures, REST APIs, databases, caching systems, and distributed session infrastructure. Mentor engineers, drive technical initiatives, address performance and scalability challenges, and uphold quality and automation practices for endpoint management products.

Designs, develops, tests, deploys, maintains, and troubleshoots complex software systems for government clients. Leads software development teams, translates customer requirements into specifications, integrates middleware and signal repositories, and manages system and subsystem-level design, documentation, quality assurance, and regression testing. Requires extensive Java, C++, XML/XSD, scripting, web framework, Linux/Unix, Docker, and software leadership experience, along with TS/SCI clearance with polygraph.

Leads architecture and technical direction for scalable, high-availability software services. Owns complex, multi-team initiatives, makes autonomous technical decisions, partners cross-functionally, mentors engineers, establishes standards, and advocates for quality. The role develops mission-critical systems supporting millions of endpoints and requires deep Java expertise, scalable system design, API development, relational databases, and strong testing practices.

Build scalable, API-first platform capabilities through manifest-driven development. Develop Java and Kotlin backend services and Python workers for third-party integrations, collaborate across engineering teams, participate in architecture reviews, and troubleshoot production systems using logs, metrics, and traces. The role requires expertise in highly scalable systems, object-oriented design, REST services, relational databases, responsive messaging, caching, and software quality practices.

Design and implement scalable backup software for endpoints, servers, and cloud applications. Develop Java and Kotlin services, optimize databases and queries, debug production systems, and resolve distributed-system performance issues. Contribute code, reviews, architecture discussions, documentation, and cross-team reliability initiatives. Mentor engineers and help deliver resilient products operating at large scale.

Lead development and architecture of highly scalable Java services supporting NinjaOne’s third-party patching catalog. Design high-availability systems, solve complex scalability and system-design challenges, improve quality and performance, collaborate cross-functionally, mentor engineers, and own technical initiatives. The role requires expertise in Java, RESTful APIs, Spring, relational databases, caching, asynchronous application design, and large-scale cloud systems.

Develop and architect scalable Java software for NinjaOne’s endpoint management platform. The role involves building high-availability services, leading technical initiatives, making architectural decisions, improving quality practices, collaborating cross-functionally, mentoring engineers, and addressing scalability, performance, and technical debt challenges.

Develop and scale backend patch-management software using Java and Kotlin for millions of endpoints. Implement enterprise software, design scalable systems, build REST services, work with relational databases and caching systems, and uphold rigorous testing and quality standards. Collaborate with AI workflow, server, platform, design, and product teams. React or Angular experience may support occasional frontend work.

Design and develop scalable, highly available software systems for NinjaOne’s IT Operations platform. Build Java and Kotlin applications, implement enterprise design patterns, optimize systems serving millions of endpoints, and contribute production code. Responsibilities include REST service development, relational database work, client-server messaging, caching, scalability improvements, and quality testing. The role collaborates with engineers to deliver reliable cloud services supporting worldwide operations.

Senior individual-contributor backend engineer responsible for designing, building, and operating production-grade, highly available, strongly consistent services for wallet operations, transaction orchestration, blockchain integrations, and event-driven workflows. Implement secure, scalable APIs, cryptographic key management, Kafka-based event systems, observability with OpenTelemetry, CI/CD pipelines, and produce tests, API specs, and operational runbooks.

Develop and maintain scalable Java backend systems using Spring Boot and microservices architecture. Collaborate with customer teams, review specifications, write clean code, participate in code reviews, document solutions, and troubleshoot and optimize backend performance, reliability, and security. The role also contributes technical expertise to training next-generation AI systems, though prior AI experience is not required.

Develop and deploy full-stack applications using Java, Spring, Angular, Oracle, and Azure. Responsibilities include building REST APIs and microservices, optimizing database performance, troubleshooting across the stack, participating in architecture and code reviews, and collaborating with QA, DevOps, UX, and product teams.

Develop and maintain scalable enterprise Java applications and Spring-based microservices. Responsibilities include hands-on coding, unit and system testing, debugging, technical documentation, performance optimization, troubleshooting distributed cloud environments, and adherence to software development and security standards. Collaborate with technical leads, architects, and cross-functional Agile teams to design and implement complex global applications.

Develop, test, enhance, and maintain Java backend applications, services, APIs, integrations, and business logic for a mission-critical transportation system. Troubleshoot defects and performance issues, write unit and integration tests, support CI/CD and DevSecOps processes, participate in Agile ceremonies, maintain technical documentation, and collaborate with engineering, QA, infrastructure, and database teams. The role also supports secure coding, DoD compliance, application deployments, and occasional front-end integration with Angular.

Lead design and delivery of scalable, resilient distributed systems. Act as technical authority across teams, mentor engineers, drive architecture and CI/CD best practices, troubleshoot production issues, optimize performance, and enhance observability while writing production-grade Java.

Design, develop, and deliver mission-critical server-side and UI software within a SAFe DevOps environment. Use TDD/BDD and CI/CD to implement secure Java (and multi-language) solutions, integrate databases and services, and automate testing for high-assurance defense programs requiring an active TS/SCI with polygraph.

Build and maintain Java backend services, REST APIs, and full-stack web application features. Develop frontend functionality, use Python for supporting work, and apply AI coding tools such as Claude Code for development, testing, and debugging. Collaborate on design decisions and code reviews, troubleshoot issues, and support application deployment and maintenance across cloud environments.

Develop and deploy Java-based analytic software supporting target discovery and mission analytics. Collaborate with analysts and stakeholders to translate mission needs into automated workflows, rapidly prototype solutions, evaluate and integrate analytic capabilities, and support software through testing, documentation, operational deployment, and sustainment. Work within approved cloud architectures and perform design reviews, configuration management, unit testing, integration testing, debugging, and performance evaluation.

Gather and decompose customer requirements, create Jira user stories and acceptance criteria, curate sprint backlogs, support developers, conduct functional testing, present features to government customers, collaborate with UX, and participate in Agile ceremonies. The role supports planning, design, implementation, and delivery of mission-critical software systems.

Develop and sustain front-end interfaces for intelligence reporting and geospatial collaboration tools. Responsibilities include enhancing Section 508 accessibility, redeveloping user interfaces, integrating and troubleshooting application interfaces, and performing software development, testing, maintenance, and problem resolution using Java, GWT, PrimeFaces, Quarkus, HTML, CSS, and JavaScript.

Develop and sustain a high-performance geospatial collaboration and intelligence reporting tool. Responsibilities include implementing mission-driven enhancements, maintaining existing code, troubleshooting application interfaces, testing, integration, and resolving production issues. The developer will work with Java, C/C++, scripting languages, databases, search platforms, REST services, and Linux. Participation in a rotating pager schedule is required for emergency 24/7 support.

Develop and maintain software solutions using AWS managed services and technologies including Hadoop, Accumulo, Terraform, Java, and Python. The engineer will support mission-focused government programs, innovate on technical solutions, and deliver software within projects of similar scope and complexity. The role requires a Top Secret/SCI clearance with favorable Polygraph and U.S. citizenship.

Develop and maintain Java software on a small, mission-focused team supporting national security. Responsibilities require building REST-based applications, using Git, Gradle, Guice, Docker, and Linux, with potential work involving ELK, MongoDB, Ansible, Kubernetes, Angular, and TypeScript. The role requires a current Top Secret/SCI clearance with favorable polygraph, U.S. citizenship, a bachelor's degree in a relevant engineering or computer science field, and at least 14 years of software engineering experience.

Develop and maintain Linux-based tools and services supporting products including GitLab, Artifactory, MinIO, Jupyter, and SPARTANDESK. Build Java applications and Bash, Python, and PHP automation scripts; implement infrastructure as code with Ansible; manage CI/CD pipelines, Docker containers, Git workflows, and system documentation. Collaborate with developers, administrators, project managers, and mission customers to deliver integrations and sustain mission applications.

Develop scalable backend Java REST APIs and services in Linux/Unix environments. Responsibilities include backend architecture, distributed systems, API design, debugging, code reviews, automated testing, CI/CD, DevOps, and technical collaboration within Agile teams. The engineer will support complex customer solutions and contribute to mission-focused software development.