Top Staff Engineer Jobs in NYC, NY

Design and build backend services for a digital asset custody platform, including secure transaction orchestration, wallet lifecycle management, integrations with custody providers and blockchain infrastructure, resilient APIs, high-availability systems, observability, and close collaboration with security and product teams.

Design and implement scalable, low-latency Java ad-server systems; modernize legacy Java/Tomcat services; build features, observability, and cloud infrastructure (AWS/EKS/ECS); optimize caching and data stores; mentor engineers and lead technical initiatives in high-throughput ad-serving and RTB domains.

The Staff Backend Engineer will lead technical direction across backend systems, write production code, improve scalability, and mentor engineers.

Lead and shape technical direction for Network Expansion, driving cross-team initiatives and delivery of distributed, customer-facing systems. Own outcomes and metrics, mentor engineers, collaborate with product/design/operations, and improve platform reliability, testing, and deployment practices while hiring and coaching engineering talent.

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

Design and implement scalable backend systems for advisor payments, ensuring accuracy and performance, while collaborating with product teams to enhance user experience.

Lead full‑stack development for Gusto's PEO Benefits product: design and build benefits shopping, plan recommendation flows, carrier integrations, automation agents, and MCP tools; scale Ruby/Rails and JavaScript/React systems; mentor engineers; drive multi‑quarter, cross‑functional projects from spec through launch and iteration; collaborate with Product, Data, Design, and Platform teams to deliver customer‑facing features.

Lead design and implementation of the payment and clearinghouse platforms powering Headway's revenue flows. Build fault-tolerant, observable integrations (Stripe, Plaid, payers), create abstractions for adjacent teams, mentor engineers, and write high-impact code to ensure reliability, throughput, and correct reconciliation of transactions at scale.

Headway seeks a Staff Fullstack Engineer to own end-to-end product work across frontend and backend. You’ll build practice management, patient/provider engagement, AI-enabled clinical systems, onboarding, growth tools, and platform foundations. The role requires technical leadership, cross-functional strategy, mentoring, and shipping scalable, reliable systems in a complex healthcare domain.

Manage full software lifecycle for ad-sales infrastructure and inventory systems. Maintain cloud infrastructure and inventory apps, design and operate automated data pipelines, ensure system reliability, troubleshoot performance issues, and mentor junior developers while collaborating with cross-functional teams.

Manage full software development lifecycle for ad-sales infrastructure and inventory systems. Maintain cloud infrastructure (AWS, Databricks), optimize automated data pipelines, ensure file normalization/delivery, troubleshoot performance issues, administer ad-ops tools, and mentor junior developers while leading code reviews.

Design, build, test, and iterate on benefits renewal workflows across frontend and backend. Scale Ruby on Rails and JavaScript/React systems, mentor engineers, drive cross-functional projects end-to-end, implement experimentation, and collaborate with product, design, data, and platform teams to deliver reliable, customer-focused features.

Design, build, and operate Zocdoc's internal developer platform, CI/CD pipelines, and developer tooling to improve developer productivity, safety, and reliability. Collaborate across teams to deliver platform investments end-to-end, drive adoption, advance AI-assisted development capabilities, mentor engineers, and ensure platform patterns meet security and compliance requirements.

As a Staff Software Engineer, lead the architecture and operation of GPU-driven infrastructure, focusing on automation, reliability, and scalability while mentoring engineers and collaborating across teams.

Lead architecture, build, test, and scale Gusto's iOS app and mobile infrastructure. Improve build pipelines, automated testing, release processes, and foundational services (push, accessibility, localization). Collaborate across product, design, security, and infrastructure teams; prototype, iterate, and launch customer-focused features while mentoring engineers.

Design, build, and operate multi-tenant, high-throughput file and block storage for AI workloads. Implement distributed file systems and durable block volumes, optimize performance with RDMA/GPU Direct/SPDK, improve reliability and observability, collaborate with platform and infrastructure teams, and mentor other engineers.

As a Senior Site Reliability Engineer, you'll design and build complex systems, support Atlas platform operations, automate processes, and ensure high availability of services.

Lead design and implementation of LLM observability features: prototype and scale product capabilities for tracing, evaluating, and debugging generative AI systems. Work cross-functionally to influence architecture, mentor engineers, prioritize customer pain points, and drive product and engineering decisions for reliable, high-performance AI observability.

Lead full‑stack development for Gusto's HR Experience: design, build, and test employer and employee HR tools, create AI agents to scale HR partners, own large cross‑functional projects, mentor engineers, and operate on a large Ruby on Rails and JavaScript/React codebase.

As a Staff Site Reliability Engineer, you'll oversee Zscaler production data center services, optimize code, and ensure cloud service availability and performance. Collaborate with cross-functional teams to improve processes and resolve escalated issues.

The Staff Site Reliability Engineer will architect reliability strategies, manage observability, and drive operational excellence across teams, particularly in large-scale production systems.

Lead design and delivery of scalable software features from design through production. Collaborate with product and cross-functional teams, mentor engineers, champion automation and CI/CD, ensure code quality and documentation, and drive process improvements to accelerate reliable feature delivery.

The Staff Software Engineer will lead technical discussions, drive complex feature implementation, mentor team members, and innovate using new technologies.

Lead design, deployment, automation, and reliability of CoreWeave's global backbone and edge network. Drive large-scale PoP deployments, capacity planning, troubleshooting, automation (Python/Ansible/IaC), operational standards, incident leadership, and mentor engineers while participating in senior on-call rotation.

The Backend Product Engineer will enhance the Radar platform, manage API traffic, engage with customers, and work across various backend technologies to drive product success.