Top Javascript Jobs in NYC, NY

Lead backend engineering efforts to design, build, test, and deploy cloud-native, AI-enhanced microservices. Mentor engineers, drive architecture and technical direction, integrate LLMs and advanced AI tooling, and ensure scalable, performant omnichannel messaging platforms.

Design and build AI-centric full‑stack TypeScript web applications (SPAs and APIs). Collaborate on product and architecture, own technical decisions, mentor peers, perform code reviews, and manage project priorities and deliverables.

Join a team building a strategic reference data platform for client, account and instrument data. Deliver horizontally scalable, high-performance JavaScript applications, collaborate with senior business and technical partners, and maintain/extend mission-critical software. Requires strong problem-solving, independence, and ability to learn new technologies quickly.

The role involves developing scalable web-based UIs and trading tools, collaborating with traders and developers to implement trading and reporting tools.

As a JavaScript Developer, you will design, implement, and maintain web applications, collaborate with cross-functional teams, innovate solutions, and ensure high performance and availability of systems.

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.

Join Customizo as a Junior JavaScript Developer to begin your training as a ServiceNow Developer. You will learn through certification courses, mentorship, and project collaboration, while developing and optimizing solutions integrated with ServiceNow.

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.

Build and maintain cloud- and browser-based AI and automation applications (internal and customer-facing). Integrate with third-party APIs (QuickBooks, Microsoft Graph, CRM, Zoom), implement AI workflows (OpenAI), automate business processes (Zoho, PowerAutomate), and ensure security and maintainability while working closely with leadership and IT.

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.

Senior hands-on engineer owning Prebid/header-bidding wrapper and client-side monetization. Implement and maintain Prebid.js/Server integrations, optimize on-page performance/Core Web Vitals, work with GAM/GPT/IMA, deploy services on GCP, and ensure reliability at scale.

Build, maintain, and promote a robust JavaScript/TypeScript client library and related front-end components. Integrate native libraries (N-API/node-addon-api/Wasm), develop responsive React apps, contribute to backend REST APIs (Python/Rust), manage CI/CD and npm publishing, document components with Storybook, and collaborate with design for production-ready components.

Design, build, and own scalable, secure full-stack applications. Collaborate with engineers, designers, and managers to gather requirements, estimate work, maintain documentation, and deliver high-quality client-facing software using Agile practices.

Design, implement, and maintain performant, testable full-stack applications. Collaborate with designers and product managers to gather requirements, estimate work, produce documentation, and deliver scalable frontend and backend systems. Provide status reporting, follow Agile practices, and take ownership from technical design through launch.

As a Senior Full-Stack Software Engineer, you will develop AI-centric web applications, participate in architectural decisions, and mentor team members while managing project priorities and deliverables.

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.

Seeking a Full-Stack JavaScript Developer to build web applications, test software systems, and ensure software quality in a collaborative remote environment.

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.

As a Staff Full Stack Engineer, you'll lead technical direction, innovate across the tech stack, collaborate with clients, and mentor engineers to ensure best practices in a fast-paced startup environment.

Build and maintain the SaaS product, data pipelines, AI agents, and telemetry; contribute to product and tech strategy; work with customers; set engineering best practices and mentor teammates.