383 reactjs jobs at 199 companies in Londonderry, NH
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Software Engineering & Development
Boston, Massachusetts, United States
$178k-$180k/yrHybridFull Time
State StreetNYSE: STT: Provides investment servicing and management to institutional investors.
3+ YOEBachelor's (or Master's) in CS or related plus 5 (or 3) years experience; high proficiency in ReactJS, JavaScript/TypeScript, HTML/CSS, GraphQL, REST, unit testing, and modern front-end toolchains.
Odyssey Systems: Provides engineering, integration, and technical services to defense clients.
10+ YOE3+ MgmtUS citizen with active Secret clearance, BS in STEM, 10+ years software development (≥3 years technical lead/architect). Preferred: TS/SCI, MS, PMP or DAWIA. Experience with Julia, React/TypeScript, CesiumJS, Electron, ONNX, and defense simulation tools.
NVIDIANASDAQ: NVDA: Designs GPU-accelerated computing and artificial intelligence hardware.
5+ YOE5+ years experience; BS/MS in Computer Science or related (or equivalent experience); knowledge of VLSI design; JavaScript, Node.js, modern frontend frameworks; distributed microservices, databases, algorithms; strong communication.
Arlington or Atlanta or Boston or Chicago or Dallas or Denver or Detroit or Houston or Miami or Orlando or Philadelphia or Phoenix or Raleigh or Wichita
$145k-$180k/yrRemoteFull Time
Koch Inc.: Operates global manufacturing, refining, and industrial technology businesses.
Experience designing cloud-native multi-tenant SaaS architecture with React/Next.js/TypeScript, Node.js/NestJS, PostgreSQL, AWS services, Terraform, CI/CD and serving as technical lead for production applications.
Tesouro: Provides embedded payment infrastructure for software platforms and banks.
Senior-level backend engineer with ownership of production microservices, experience with distributed systems, integrating partner banks/card networks, AI-assisted workflows, and strong collaboration and judgment.
Booz Allen HamiltonNYSE: BAH: Provides technology and management consulting services to diverse organizations.
8+ YOE8+ years software development experience including backend/services, microservices, relational and NoSQL datastores, message/streaming platforms, containerization, frontend (React), CI/CD, and eligibility for Secret clearance.
Hanscom Air Force Base, Massachusetts, United States
$113k-$257k/yrHybridFull Time
Booz Allen HamiltonNYSE: BAH: Consulting and technology services for government and commercial clients
8+ YOE8+ years software development experience with backend services and microservices; experience with server-side languages, data stores, messaging, containerization, CI/CD, and secure service design; ability to obtain Secret clearance.
Java, .NET, C#, Python, Go, Kafka, React, CI/CD, AWS, Kubernetes, Prometheus, Grafana, OpenTelemetry, mTLS, OAuth2, OIDC, API gateway, service mesh
Bentley SystemsNASDAQ: BSY: Software for designing, building, and operating global infrastructure.
5+ YOE5+ years full-stack web development with 3+ years in Optimizely; deep C#/.NET Core/MVC backend and advanced HTML5/CSS3/JS frontend skills; experience with experimentation, personalization, and CI/CD.
Atlanta or Boston or Chicago or Indianapolis or United States or Canada or North America
RemoteFull Time
Greenlight Guru: Quality management and clinical data software for medical devices.
4+ YOE4+ years professional software development experience; React and modern JavaScript framework proficiency; experience with LLMs/generative AI and cloud-native architectures; REST/RPC/GraphQL APIs, testing, CI, and strong communication skills.
KAYAK: Global travel search engine for flights, hotels, and rentals.
5+ YOE5+ years software engineering experience, strong Java skills, API and SQL/MySQL experience, ability to design and deliver backend systems, cross-functional collaboration, mentoring, and CS degree or equivalent.
EAB: Providing research and technology solutions to educational institutions.
6+ YOE6+ years in cloud-based software development with strong Ruby on Rails, React, MySQL/PostgreSQL, Docker, AWS experience; leadership, CS fundamentals, performance optimization, and mentoring skills.
Formlabs: Develops and manufactures professional-grade 3D printers and materials.
Full-stack web development experience with Python/Django and Next.js/React.js, production software ownership, collaboration with cross-functional teams, and willingness to work on-site in Billerica, MA as needed.
Python, Django, Next.js, React.js, Manufacturing Execution System (MES)
KlaviyoNYSE: KVYO: Software platform for automated e-commerce marketing and customer data.
2+ YOE2+ years full-stack experience, proficiency in Python or TypeScript/React, experience with data at scale, degree or equivalent experience, strong communication and cross-functional collaboration skills.
SS&C TechnologiesNasdaq: SSNC: Provides software and technology for financial and healthcare sectors.
5+ YOE5+ years of software development; full-stack SaaS experience; clean, maintainable code; strong communication; able to work in fast-paced environment.
Boston Partners: Global investment firm specializing in value equity management strategies.
5+ YOEBachelor's in computer science or equivalent,5+ years software development experience,proficiency in SQL and Microsoft SQL Server,C# and/or Java,Git/TFVC;financial services experience preferred.
SQL, Microsoft SQL Server, C#, Java, Git, TFVC, Charles River Investment Management System, Markit EDM Platform, Data Warehouse Platforms, Angular, React, GPT