Top Senior Full-Stack Engineer Jobs in NYC, NY

The Senior Full Stack Engineer will design and develop features for the platform, maintain code, and collaborate across teams to improve engineering processes.

Build AI-native full-stack features for the Amplify control plane, delivering production-ready React frontends and scalable Java microservices. Design databases, APIs, improve reliability, mentor engineers, and use AI-assisted tools responsibly to accelerate development and maintain high-quality, observable production systems.

As a Senior Full Stack Engineer, you will design and develop scalable APIs, integrate financial data, and enhance user experience in a collaborative environment.

The Senior Full-Stack Engineer will manage client relationships, design integration solutions, and ensure seamless delivery and optimization of technical workflows, while leveraging AI for efficiency.

The Senior Full Stack Developer will lead full stack development, mentor engineers, refactor services, and uphold system performance and security standards in a hybrid work environment.

Lead design and build of an AI-native marketing platform: integrations, multi-agent orchestration, UIs, tooling, analytics, CI/CD, auth/multi-tenancy, and production AI agents to automate marketing workflows and drive adoption across teams.

The Full Stack Senior Software Engineer will design, implement, and ship features across frontend and backend systems, enhancing the Grow Therapy platform. Responsibilities include lifecycle ownership of work, improving core systems, resolving production incidents, writing maintainable code, and collaborating with cross-functional teams.

The Senior Full Stack Engineer will build Fora's products and infrastructure, focusing on web development and collaborating with cross-functional teams to enhance the user experience for travel advisors.

The role involves leading a team of developers to deliver cloud-based solutions, mentoring staff, and driving transformation using various technologies in a collaborative environment.

Lead technology projects and a developer team, create solutions meeting regulatory needs, and deliver cloud-based solutions for financial empowerment.

Build and maintain React + TypeScript front-end applications, create prototypes, contribute reusable components and tests to shared libraries, integrate APIs and data services, and collaborate with designers, product, data scientists, and engineers to deliver data-driven decision intelligence products.

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.

As a Senior Full-Stack Engineer, you'll build user-ready features, collaborate on project scoping, and ensure reliable solutions, blending frontend and backend development.

As a Fullstack Engineer, you will develop and optimize media publishing features, ensuring high-quality experiences and collaborating across teams to deliver impactful functionalities.

Design, build, and maintain full-stack web products focused on frontend and backend work. Implement REST APIs, integrations, and features using React, Node.js, TypeScript, and AWS Lambda while collaborating on code reviews, deployments, and reliability improvements.

Build and own end-to-end full-stack features for provider onboarding, customization, benchmarking, and sales/marketing tooling. Develop React UIs and backend APIs/data models (Python), collaborate cross-functionally with product, sales, and marketing, contribute to architecture, and deliver reliable, maintainable code in a fast-moving, greenfield startup environment.

As a Staff Full Stack Engineer, you'll architect full-stack solutions using Python, React, and AWS, ensuring high engineering standards, and collaborating with clinical and technical teams to develop AI-powered systems.

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

The Senior Fullstack Engineer will build and manage enterprise authentication systems, improve user session management, ensure security compliance, and support internal API usage across services, while enhancing performance and reliability.

Senior Full Stack Engineer to design, build, and scale features across Node.js/React/TypeScript stack. Own project lifecycle, collaborate with product/design, mentor teammates, and drive architecture and performance improvements for B2B and customer-facing products.

Build end-to-end features and new products for a creator-focused marketing platform. Work across frontend and backend, collaborate with design and users, make architectural decisions, and establish engineering standards, tooling, and processes for a growing team.

Build and operate end-to-end premium purchasing and subscription systems (Stripe, Apple/Google IAP, payments). Own projects from design through rollout and reliability, instrument observability, debug production, define metrics, mentor engineers, and drive technical direction and standards.

Lead full‑stack teams to design and deliver cloud-based, microservices solutions. Mentor engineers, collaborate with product managers, and build scalable systems using Python, ReactJS, AWS, containers, and modern data tools to meet regulatory and customer needs.

Responsible for leading a team of engineers, supporting product development, identifying technical issues, and ensuring high-quality code delivery in backend systems at scale.

Design, build, and operate scalable full‑stack web applications and backend services for high‑traffic enterprise environments. Lead architecture, reliability, performance, security, CI/CD, and AI‑assisted development workflows. Mentor engineers, conduct code reviews, support production incidents, and collaborate with product, design, and platform teams to deliver maintainable, observable, and performant software.