Top Staff Software Engineer Jobs in NYC, NY

Lead full‑stack development for Gusto's Time and Scheduling product: design, build, test, and iterate frontend and backend systems. Mentor engineers, own multi‑quarter projects, address large‑scale refactors, performance and reliability, and collaborate with product, design, data, and platform teams to deliver customer‑focused features.

Lead the technical evolution of the Incentive Offers platform by architecting scalable services and mentoring engineers while solving complex technical challenges.

As a Staff Software Engineer at Addition Wealth, you will architect systems, lead product development, and improve user experiences using modern technologies.

Design, build, and maintain production platforms and services that automate and operate CoreWeave's network (config generation, provisioning, workflow automation, observability, CLIs/APIs). Lead technical direction, plan multi-month projects, write high-quality Python and Go software, define SLOs/SLIs, reduce manual toil, participate in on-call, mentor engineers, and collaborate across Network, Observability, Fleet, and HPC teams.

The Senior Staff Software Engineer leads large-scale systems design, optimizes performance and reliability, mentors engineers, and influences engineering culture at Datadog.

Lead design and execution of scalable log ingestion, search, and query systems. Partner with product and customers to define features, prototype AI-powered capabilities, optimize pipeline performance, and mentor engineers to grow a high-performing team.

The Staff Software Engineer will address technical challenges, lead teams, design solutions, and collaborate with various stakeholders to enhance fund management software.

The Staff Software Engineer will lead architectural design and delivery, focusing on performance and efficiency of systems at scale.

As a Staff Software Engineer, you will direct the architecture of observability pipelines, build scalable log management systems, and enhance performance in customer-managed environments.

As a Staff Software Engineer in Billing, you will design scalable billing systems, lead projects, and ensure data integrity while collaborating with various teams.

The Staff Software Engineer will lead architectural design and delivery of critical systems, ensuring performance and efficiency at scale, while mentoring others in the engineering community.

Lead full-stack development for employer and employee tax account systems: design reliable backend APIs and data models, build automation and agency-integration pipelines, model jurisdiction-specific compliance rules, mentor engineers, partner with product and operations, and deliver scalable, test-driven solutions that ensure tax accuracy and reliability at scale.

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.

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.

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.

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.

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.

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.

Design, build, and own scalable microservices and secure APIs that transfer value across blockchain and banking protocols. Extend in-house blockchain infrastructure, integrate with banks and cloud services, troubleshoot production issues, document system and testing procedures, and collaborate with product and engineering teams to deliver reliable payment experiences.

Design, build, and operate the core data warehouse, ingestion, orchestration, and cataloging platform. Develop batch and streaming pipelines, ensure data quality, governance, observability, and provide ML data platform capabilities. Lead architecture, improve platform reliability and performance, and collaborate with product, engineering, data science, security, and compliance teams.