173 senior react developer jobs at 80 companies in Hanover, PA
🚀PromotedHiringCafe
Founding Full-stack / Product Engineer
Cupertino, CA, US
$130k-$300k/yrOn-SiteFull Time
HiringCafe: Building a 100× better job search engine to take on Indeed and LinkedIn.
Help us build a 100× better job search engine. We need a full-stack engineer with great taste, sharp fundamentals, and a track record of shipping polished product on React/Next.js plus a real backend (Firebase, Elasticsearch, Redis, Stripe).
Freedom Technology Solutions Group: Provides geospatial and software engineering solutions for national security agencies.
12+ YOESenior full-stack developer proficient in React and Java/Spring Boot; experience migrating legacy systems; ability to work with Camunda and Pega workflows; strong REST APIs and Oracle/SQL skills.
React, Java, Spring Boot, Camunda, Pega, Oracle, SQL, REST API
SITEC: Provides specialized IT and engineering services to government agencies.
6+ YOEActive TS/SCI with Polygraph, Bachelor's in technical discipline (or 10 years' experience), 6+ years software development, strong React and JavaScript/TypeScript skills, SQL/NoSQL familiarity, able to work core hours 10:00-14:00 M-F.
Laurel or Washington or Baltimore or Montgomery or San Antonio or Virginia or United States
$130k-$160k/yrHybridFull Time
ERP International: Provider of healthcare and technology solutions for federal agencies.
8+ YOE8+ years Java/Spring Boot, 5+ years React, microservice and API development, unit testing (JUnit/Mockito/Cucumber), Agile/DevSecOps and CI/CD experience; US citizen able to obtain Secret DoD clearance.
Java, Spring Boot, React, Postgres, Redis, Junit, Mockito, Cucumber, Jira, Confluence, Docker, Kubernetes, DevSecOps, CI/CD, Microsoft Teams, DoD STIG
Mindgrub: Digital agency providing custom software and AI innovation solutions.
4+ YOEU.S. citizen required. 4+ years front-end experience with React and JavaScript/TypeScript. Experience with reusable component libraries, client-side state, accessibility, responsive design, testing, CI/CD, and strong communication skills.
Booz Allen HamiltonNYSE: BAH: Provides technology and management consulting services to diverse organizations.
10+ YOESenior full-stack developer with React/Next.js, Git/Jenkins, TS/SCI with polygraph, and 10+ years of software engineering experience (or relevant degrees with more years).
Booz Allen HamiltonNYSE: BAH: Consulting and technology services for government and commercial clients
10+ YOESenior full-stack developer with TS/SCI clearance; 16+ years’ experience (or 12+ with a BA; 10+ with an MS); proficiency in React/Next.js, Git, CI/CD, middleware, Docker/Kubernetes, Python; familiar with LLM/RAG and cloud tools.
OceaneeringNYSE: OII: Global provider of engineered services for offshore energy industries.
8+ YOEBachelor's in STEM (or equivalent experience), 8+ years software engineering experience, extensive React.js and JavaScript expertise, ability to obtain DoD security clearance, leadership and mentoring experience, Linux, RESTful APIs, gRPC/MQTT/DDS/WebSockets, CI/CD and containerization knowledge.
Envision Innovative Solutions: Provides technical engineering and mission support to government agencies.
14+ YOE14 years of experience with a bachelor’s degree in computer science (or related field) or 18 years without the degree; experience with Java, JavaScript, TypeScript, CSS, HTML; desired: Material UI, React, Docker, Kubernetes, Rancher, Gitlab Pipelines; security clearance TS/SCI with Full Scope Polygraph.
Surefire Cyber: Provides rapid incident response and digital forensics services.
Strong software engineering fundamentals; full-stack Python and React; production AWS and Kubernetes; Terraform; GitHub Actions; autonomy in a startup; eager to learn agentic AI workflows.
AGE Solutions: Technology consulting and IT services for government agencies.
10+ YOEBachelor's degree, 10+ years software development, 3–5+ years full-stack web experience (React/Vue/Angular and Node.js/Python/Java), DoD Secret clearance, DoD 8140 qualification, cloud and CI/CD expertise.
The Baltimore Banner: Independent nonprofit digital newsroom serving the Baltimore region.
5+ YOE5+ years software development, 3+ years building scalable web apps, strong JavaScript (React/Angular/Vue), Node.js, cloud (AWS preferred), database and caching experience, bachelor’s or equivalent.
ClearEdge: Provides software engineering and data analytics for defense agencies.
15+ YOETS/SCI with polygraph required; 15+ years software engineering experience; full-stack development expertise with Java and JavaScript; proficiency with modern JavaScript frameworks (React, Vue, Angular); familiarity with Section 508 and SDLC.
Belay Technologies: Provides specialized technology and engineering services to the DoD.
20+ YOETS/SCI with polygraph required; 20+ years development experience or 24 years without a bachelor's; bachelor's in technical discipline required (or substituted by experience); experience with AWS, Git, Docker/Kubernetes, HAProxy, Nginx, Node.js, Angular, React, NoSQL and relational databases.
Titan Technologies: Provides IT solutions and services to government agencies.
10+ YOE10+ years frontend or software development; 5+ years frontend with modern JS (React/Angular/Vue); UI/UX focus; Agile; CI/CD; DoD TS clearance preferred.
Impruvon Health: Automated medication management and clinical workflow platform for providers.
5+ YOE5+ years software engineering experience, ownership of features from design to production, deep Ruby on Rails backend expertise, relational DB design, strong communication; React and Flutter experience preferred.