Top Senior Software Engineer Jobs in NYC, NY

Design and build UIs and features for Oso's authorization service, enhance user experience, and engage with users for support.

As a Software Engineer at Citadel, you will build systems for investments, collaborate with researchers, and tackle complex problems.

Build frontend experiences, contribute to design decisions, mentor junior engineers, and engage with customers to address complex challenges.

Design and build scalable backend architecture, mentor junior engineers, and ensure data synchronization for customer SaaS tools while engaging with clients to solve complex problems.

As a Senior Backend Engineer at Kensho, you will design and develop secure, reliable APIs, collaborate with diverse teams, and improve application performance.

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.

As a Senior Full-Stack Software Engineer, you'll build AI-centric web applications using TypeScript, manage project priorities, and collaborate on product decisions while mentoring others.

The Lead Java Software Engineer will architect and build scalable risk and pricing systems, mentor teams, ensure engineering excellence, and meet regulatory compliance in a high-pressure environment.

Design, build, test, and scale Gusto's native iOS app and supporting mobile web views. Collaborate cross-functionally to develop product features, platform components, push notification and localization services, and maintain iOS infrastructure including build pipelines, testing automation, and release processes.

The Senior Options Software Engineer will design, develop, and support a high-performance trading platform, collaborating with business leaders to create innovative software solutions and handle complex systems support for trading activities.

Design and develop software solutions, analyze complex problems, and provide support for trading activities in a dynamic environment.

Design, maintain, and evolve core backend systems and APIs. Collaborate with product teams to create durable and reusable systems while enhancing performance and security.

The software engineer will build and operate infrastructure for AI agents, ensuring reliability, scalability, and security. Responsibilities include managing LLM services, developing storage systems, and enhancing observability while collaborating cross-functionally.

The Staff Software Engineer will design and build agentic systems, architect workflows, develop skill injectors, and collaborate on AI tooling within the Vercel Agent team.

The Software Engineer, Backend will develop scalable distributed systems, build REST APIs, and ensure high-quality software delivery while collaborating with teammates and stakeholders.

The Senior Trading Software Engineer will optimize performance-critical code, collaborate with trading engineers, implement low-latency solutions, and enhance trading systems.

Design, build, deploy, and optimize scalable full-stack applications integrating databases, APIs, and AI/LLM workflows. Lead architecture, CI/CD (ArgoCD, GitLab), Airflow pipelines, and collaborate cross-functionally to deliver production-grade fintech solutions.

As a Senior Software Engineer, you will design, build, and launch new product features, tackling complex engineering challenges in a high-performance environment, while directly shaping product and business outcomes.

As a Software Engineer in Buyer Growth, you will drive growth initiatives, design end-to-end systems, and mentor engineers in a fast-paced environment.

Design and build large-scale systems for managing merchandise, ensuring data synchronization across platforms, and collaborating with cross-functional teams to support enterprise-level sellers.

The Developer Experience Engineer will improve developer experience by modernizing tools, building AI-powered systems, and accelerating product delivery at Kustomer.

As a Software Engineer on the Workflows Team, you'll develop the Workflow Development Kit and platform, emphasizing AI integrations, durability, and observability while collaborating with cross-functional teams and engaging with the open-source community.

Responsible for developing and enhancing an AI SDK, ensuring high performance and integration with deployment platforms, while collaborating with cross-functional teams and engaging with the open-source community.

As a Full Stack Engineer, you will build and manage the Vercel Dashboard, creating a personalized interface while optimizing backend services, APIs, and user interactions.

Develop and enhance AI Gateway platform, contributing to the design and maintenance of features for optimal reliability in AI workloads while collaborating with cross-functional teams.