Top Senior Full-Stack Engineer Jobs in NYC, NY

The Senior Full Stack Engineer will lead Partnerships & Martech projects, optimizing workflows and building tools using Node, TypeScript, React, and GraphQL while collaborating with stakeholders to enhance user experience and operational efficiency.

The Senior Fullstack Engineer will own user-impacting projects, participate in design reviews, contribute to process improvements, understand user needs, and assist with team growth.

Lead diverse technology projects, collaborate on cloud-based solutions, mentor developers, and stay up-to-date with new technologies in software engineering.

The Senior Full Stack Software Engineer will design and develop scalable web applications, work across the stack, collaborate with teams, and integrate AI features while mentoring junior developers.

Lead design and delivery of provider-facing backend services and frontend applications. Own features end-to-end, mentor engineers, build React/TypeScript interfaces, design DRF REST APIs and database schemas, use LLM tooling (Claude) to accelerate development, and operate services on Kubernetes/GCP with Datadog for monitoring.

As a Senior Full-Stack Engineer at Parambil, you'll design and implement features for an AI-powered legal tech platform, collaborating closely with cross-functional teams and ensuring quality production delivery.

The Senior Full Stack Engineer will design and develop secure, scalable Web3 and blockchain systems, build APIs and distributed services, and mentor junior staff.

The Senior Full-Stack Developer will manage architecture and delivery for a web application, integrating historical data into SAP S/4HANA. Responsibilities include overseeing development, integrating cloud identity, and leading architectural documentation.

Develop consumer-centric web applications, enhance usability, collaborate with designers, implement backend software and APIs, write tested code, and follow agile development cycles.

As a Senior Full-Stack Engineer, lead design and development of complex search features, optimize development processes with AI tools, and mentor juniors in a collaborative environment.

The Senior Full-Stack Engineer will design, implement, and maintain systems for Trading API customers, focusing on both frontend and backend development, while leading projects and mentoring peers.

The Senior Full Stack Engineer will design, build, and scale healthcare integrations, ensuring high security and quality, while collaborating with cross-functional teams and supporting enterprise-level integrations.

As a Senior Full-Stack Software Engineer, you'll build AI-driven web applications in TypeScript, manage technical decisions, collaborate on products, and mentor team members while ensuring high-quality user experiences.

Develop and maintain advisor payment systems; collaborate with cross-functional teams to enhance user experience and financial transparency; manage backend services.

Build and maintain user-facing interactive features and backend APIs. Own architecture, write well-tested code, participate in reviews and standups, ensure production reliability, and create development and deployment standards.

Build and ship complex consumer-facing full stack applications. Work on React/TypeScript frontends (offline PWAs using IndexedDB/DexieJS and Workbox) and Scala/Play backends with PostgreSQL. Deploy on AWS via Kubernetes. Mentor engineers, collaborate in product-focused cycles, and thrive in a fast-moving startup environment.

Design and build features across a React/TypeScript frontend and Go backend for real-time dispatch systems. Implement WebSocket-driven tracking, GIS integrations, multi-tenant architectures, performance and state management improvements, production debugging, and collaborate with Product and Operations to deliver agency commitments.

Senior CRM systems full stack engineer to design, develop, integrate, and maintain Salesforce and Salesforce Marketing Cloud solutions. Build ETL pipelines, AWS microservices, and integrations, provide tier-3 support, lead testing/UAT, document requirements, and train teams while ensuring code quality and deployment processes.

Build and maintain scalable full-stack features for a fintech SaaS platform. Implement React front-ends and Node.js/NestJS back-end APIs, troubleshoot production systems (databases, queues, caches, microservices), write tests and clean code, collaborate with product and design, participate in code reviews, and prioritize technical debt while scaling the user base.

Design, develop, and maintain full-stack web applications using Java/Spring Boot backends and Angular frontends. Build RESTful APIs, write clean code, collaborate with cross-functional teams, troubleshoot issues, and participate across the SDLC.

Design, develop, and maintain web applications and RESTful APIs using Java/Spring Boot. Develop and maintain PL/SQL stored procedures and Oracle database logic. Participate across the SDLC, troubleshoot backend and database issues, collaborate with cross-functional teams, and improve development processes and tooling.

Lead consolidation and modernization of two legacy giving marketplace applications into a single scalable stack. Re-architect, refactor, and optimize back end (Java, Spring Boot, Hibernate) and front end (Angular, NgRx, SCSS). Implement features, ensure UI/UX feasibility, address performance and scalability, conduct code reviews, and collaborate with the team to deliver a robust application.

Design, develop, and maintain web applications using Java/Spring Boot backends and Angular frontends. Build RESTful APIs, write clean maintainable code, participate across the SDLC, collaborate with cross-functional teams, troubleshoot full-stack issues, and help improve development processes and tools.

Lead full‑stack development of enterprise web and middle‑tier applications for financial advisors using Angular/TypeScript and Java/Spring. Design, implement, test, and deploy features in an Agile Scrum team, driving CI/CD, cloud (AWS) deployments with Docker, Kubernetes, and Terraform, while mentoring engineers and collaborating with business stakeholders.

Design, build, and maintain backend applications, microservices, and APIs; implement third-party integrations; ensure security, testing, and documentation; deliver client-facing features; collaborate with product and business stakeholders; estimate scope/timelines; work across the stack to create scalable, high-performance systems.