Top Senior Full-Stack Engineer Jobs in NYC, NY

Lead development of Bubble's mobile app builder and React Native runtime, expand the web editor for mobile app creation, and architect deployment pipelines for publishing to the Apple App Store and Google Play while collaborating with product, design, and support teams.

The Senior Full Stack Engineer will build and scale the performance marketing platform, focusing on both front-end experiences and backend APIs, while collaborating cross-functionally and mentoring junior engineers.

As a Senior Product Engineer, you'll develop AI-driven software for accounting workflows, manage full-stack projects, and collaborate with cross-functional teams to enhance user experience and product features.

The Senior Full-Stack Developer will design, build, and maintain AIO Logic's cloud-based AXIS platform, utilizing React and Java/Spring Boot to deliver software solutions for complex financial workflows, collaborating with cross-functional teams, and mentoring junior developers.

Lead design, development, and delivery of frontend and backend web applications; provide technical architecture and leadership; collaborate across teams; implement Angular frontends with API-first backends; ensure scale, resilience, testing, and support; drive product roadmap, stakeholder management, and continuous improvement.

The Senior Full Stack Developer will design, develop, and deliver scalable cloud-based solutions, leading product features from prototype to production while ensuring code quality and engaging with customers for product improvement.

The Senior Full Stack Software Engineer II at Upside is responsible for developing high-quality software, collaborating with cross-functional teams, mentoring other engineers, and driving improvements in system performance and quality.

Lead full-cycle projects impacting millions and collaborate with product and UX teams to define requirements and execute development plans.

Lead backend-focused full-stack development for a low-code platform: design and implement Python backends and React frontends, architect external APIs, ensure performance and security, drive testing and best practices, mentor engineers, and own production systems end-to-end.

As a Senior Fullstack Engineer, you'll develop and maintain scalable APIs and web applications, engage with customers to meet their needs, and collaborate on product features to improve Layer Health's applications.

Design and implement full-stack web applications for digital wallets, owning features from conception to optimization while collaborating across teams.

Design and implement full-stack applications for GenAI, build developer tooling, collaborate with product teams, and enhance AI agent delivery.

Lead development and scaling of the StashWorks B2B fintech platform. Own product roadmap, deliver end-to-end features, instrument and test systems, deploy to cloud infrastructure, and leverage AI tools to accelerate development while ensuring security, reliability, and platform maturity.

Adonis is seeking a Senior Full Stack Engineer to design, develop, and maintain scalable web applications and APIs, mentor junior engineers, and ensure high code quality.

The role involves responsibilities related to full-stack product engineering, with participation in on-call rotations for team support.

The Senior Full Stack Developer will design, build, and maintain backend services and React-based front-end applications, ensuring performance and reliability while mentoring junior engineers and automating workflows.

The Senior Full-Stack Software Engineer will design, build, and scale SaaS products, improve application performance, and lead technical initiatives. Responsibilities include modernizing web applications, contributing to backend services, and mentoring other engineers.

Build end-to-end product features for customers to configure, monitor, and interact with AI agents. Design APIs, database schemas, backend systems, and frontend interfaces; own feature delivery, iterate with design/product, and create analytics, conversation UIs, and onboarding workflows.

Commure seeks a Senior Fullstack Engineer to design scalable healthcare solutions, enhancing user experience through responsive interfaces. Responsibilities include architecture decisions, mentoring, and collaborating on features.

Design, build, and deploy frontend and backend services for video and audio tools, working with emerging web standards and technologies. Collaborate closely with design and product teams to enhance user experience.

Lead diverse technology projects and teams in developing cloud-based solutions, mentor engineers, and stay updated on tech trends.

The role involves leading projects as a full-stack engineer, focusing on SaaS products, enhancing user experiences, and building accessible software.

Lead AI integration and full-stack development across the platform, rapidly prototype and ship production-quality features using Node.js, React, TypeScript, Ruby, GraphQL and Postgres, ensure secure handling of healthcare data, set technical standards, and mentor engineering team members.

The Full-Stack Engineer role involves building core features, architecting AI systems, developing UIs, and optimizing performance, with a focus on collaboration and ownership.

As a Senior Full Stack Engineer, you'll implement product features, ensure high quality, and collaborate with teams to enhance user engagement and experience.