Top Javascript Jobs in Baltimore, MD

Develop and maintain high-scale JavaScript and TypeScript monetization solutions using Prebid.js, Prebid Server, and Google Ad Manager. Own the header bidding wrapper, integrate auction and ad-tech standards, optimize Core Web Vitals and client-side performance, operate Google Cloud services, review code, document architecture, and resolve production issues.

Develop and improve a software system, utilizing modern frameworks and patterns while collaborating in a team environment. Requires API and data handling expertise.

Build end-to-end features in a JS/TS stack, designing scalable backend services and responsive real-time frontends. Improve observability, performance, and reliability, collaborate with product/design, and own full-stack implementation from APIs and data models to UI.

Develop and enhance classification marking and M365 web-based tools using JavaScript and modern frameworks. Implement features, write unit/functional tests, perform code reviews, containerize apps with Docker, integrate via GitLab CI, troubleshoot, and work directly with customers. Must hold TS/SCI with FSP.

Develop and extend policy-driven classification and M365 web tools using JavaScript/TypeScript and Node.js. Participate in full software lifecycle: requirements elicitation, design, implementation, testing, documentation, code reviews, and customer support. Use AWS, Docker, Git/GitLab, Jest, and Cypress; follow team coding standards and troubleshoot production issues.

The role involves leading the development of a high-performance Web SDK for fraud detection and risk management, implementing algorithms for device fingerprinting, and ensuring security and performance optimization.

Lead systems engineer for a mission-critical system: elicit and document functional and technical requirements, perform workflow/process engineering, define technical requirements and architectures, coordinate with product owners, developers, and stakeholders, facilitate sprint execution, testing, and demos, and act as the primary technical liaison.

Develop and sustain a high-performance geospatial collaboration reporting tool. Enhance and redevelop the frontend to meet Section 508 accessibility requirements, troubleshoot interfaces between applications, and implement feature improvements and maintenance for the reporting tool suite.

Develop and sustain a mission-critical reporting and geospatial collaboration frontend. Redevelop and enhance the UI for Section 508 accessibility, maintain interfaces between applications, troubleshoot issues, and support ongoing feature enhancements and testing for intelligence community reporting tools.

Design, develop, and maintain scalable automated UI and API tests using Cypress; execute suites, analyze failures, document defects and metrics; integrate testing into CI/CD pipelines; and collaborate with Agile cross-functional teams to validate features and support modernization efforts.

Mid-level (expert) full-stack software engineer to design, develop, optimize, and sustain high-performance, scalable enterprise and real-time systems. Collaborate with stakeholders, mentor developers, deliver modular reusable components, and work across the full SDLC to meet mission needs in a secure, defense-focused environment.

Full-Stack software engineer to develop and maintain web services and front-end features using Python, JavaScript, CSS, REST, and Docker Compose. Support daily engineering tasks on mission-focused projects for a defense customer. Must hold active Top Secret/SCI with favorable polygraph and be a U.S. citizen. Contribute to design, implementation, and deployment of production software.

Design and build full-stack applications that expose AI/ML insights. Develop backend services in Python, RESTful APIs, and containerized microservices. Build high-performance front-end interfaces with React/Vue/Angular. Implement cloud-native solutions on Google Cloud or Azure, manage relational and NoSQL databases, apply testing and CI/CD, and participate in Agile development and architecture sessions.

Onsite JavaScript developer responsible for fixing Cross-Site Scripting issues, understanding third-party JavaScript communication, ensuring cross-browser compatibility, debugging across platforms/devices, performance tuning across networks/countries, and writing/using JavaScript unit tests.

Maintain and extend long-term supported forks of major JavaScript frameworks. Develop and secure code in JavaScript/TypeScript, backport fixes, triage and patch CVEs, build CI/CD and automation, collaborate with security and OSS contributors, and drive platform reliability and architecture decisions.

Senior full‑stack engineer responsible for building backend services (Node.js/TypeScript) and integrating with frontends (React/Vue). Ship production APIs, collaborate cross‑functionally, own delivery, mentor peers, and develop modular, testable, performant systems across diverse greenfield projects.

The Senior Full Stack JavaScript Developer will build and maintain user interfaces using React and Next.js, integrate with Node.js backends, and guide other developers. Responsibilities include ensuring accessibility, performance, and reliability of features, engaging in code reviews, and collaborating closely with product teams.

Design, develop, test, and document classification‑marking and access‑control software for mission systems and M365 apps. Implement features, extend validation tools, create unit and functional tests, Dockerize applications, use AWS and GitLab CI, troubleshoot issues, conduct code reviews, and collaborate with customers and teammates throughout the software lifecycle.

Build and maintain Supabase JS/TS SDKs used across runtimes. Author libraries, manage public repos, triage issues, review PRs, keep CI/release automation healthy, own type experience, support realtime/WebSocket semantics, ensure cross-runtime compatibility, write RFCs, docs, and migration guides, and improve SDKs for AI coding agents.