Top Staff Software Engineer Jobs in NYC, NY

Architect target-state applications and modernize legacy banking systems into microservice and event-driven platforms. Define technical vision, architecture, API standards, and design practices while ensuring scalability, performance, security, and operability. Provide hands-on technical leadership, mentor engineers, support cross-divisional initiatives, lead architectural reviews, and promote engineering excellence across technology and product teams.

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.

Lead technical architecture and large, ambiguous projects for Braze’s Messaging Experience division. Build and evolve scalable backend systems, real-time and batch processing infrastructure, orchestration frameworks, and complex web interfaces using Ruby on Rails, TypeScript, and React. Mentor engineers, improve reliability and observability, reduce technical debt, and deliver foundational platforms and code-generation tooling supporting messaging journeys across multiple teams.

Staff backend infrastructure engineer responsible for platform reliability, performance, regional resilience, failover, migrations, data pipelines, observability, incident response, and shared engineering tooling. The role leads cross-team technical direction, mentors engineers, and partners with security and compliance in a regulated financial services environment. Key technologies include Java, MongoDB, Kubernetes/GKE, Terraform, Datadog, and cloud infrastructure.

Lead technical strategy and execution for Affirm’s account management team, building secure, scalable fullstack systems and customer account security experiences. Collaborate with product, design, analytics, and engineering teams; establish quality, monitoring, testing, and operational standards; support availability and on-call practices; communicate technical decisions; and mentor engineers.

Design, implement, operate, and scale critical backend services, including identity, social graph, and persistence systems. Collaborate across teams to deliver product solutions, ensure availability and operational excellence, test and debug code, and participate in incident resolution. The role requires technical leadership, distributed-systems expertise, and effective use of AI development tools while maintaining security, performance, and production-quality standards.

Staff Software Engineer responsible for technical strategy, scalable full-stack systems, team operations, reliability, monitoring, code quality, and talent development. The role involves building customer-facing card experiences and backend services using Python or Kotlin, AWS, MySQL, Spark, Kubernetes, and React-based frameworks. The engineer will own features end to end, collaborate cross-functionally, manage technical risks and trade-offs, support on-call health, and apply AI safely to improve development and customer experiences.

Lead large-scale initiatives for a high-performance Linux-based network sensor, improving ingestion, scalability, continuous capture, queue reliability, observability, and production diagnostics. Own root cause analysis and postmortems, establish engineering standards, translate business goals into technical plans, and mentor engineers through design and code reviews. The role requires deep Rust expertise, distributed systems experience, concurrent programming, packet capture, message brokers, and cybersecurity best practices.

Build a greenfield, low-latency algorithmic execution platform in C++. Responsibilities include developing FIX gateways, exchange market data feed handlers, venue connectivity, pre-trade risk controls, platform infrastructure, audit logging, and algorithmic strategy migration. The role requires optimizing critical paths for microsecond-level performance while integrating U.S. exchanges and dark venues. Future work includes multi-asset execution, research and backtesting, and international market expansion.

Improve Radar’s geocoding and autocomplete systems at massive scale by enhancing query understanding, retrieval, ranking, relevance, and location-data quality. Build automated data pipelines, integrate messy global sources, and apply ML or LLMs where useful. Work across Scala and Python data pipelines, Rust search and serving systems, and customer-facing product improvements while participating in on-call support.

Own the architecture and technical direction for provider-sourced client products, including lead management, caseload migration, AI-powered inquiry workflows, and provider marketing tools. Partner cross-functionally with product, design, data, sales, customer experience, and pricing teams. Build reliable user-facing systems, guide technical decisions across teams, measure product impact through experimentation, and influence teams without direct authority.

Architect and operate Affirm’s large-scale Amazon EKS compute platform, including cluster lifecycle, node management, autoscaling, shared components, infrastructure automation, workload safety policies, observability, cost and capacity optimization, and self-service workflows. The role drives technical strategy, mentors engineers, partners cross-functionally, and participates in on-call incident response.

Own the architecture and technical direction of Metropolis Recognition Platform, spanning edge ingestion, identity resolution, real-time decisioning, notifications, and operator tools. Design scalable streaming pipelines, rules systems, privacy and consent models, observability, testing, and progressive delivery. Lead RFCs, cross-functional alignment, architectural reviews, mentorship, and production quality across application, computer vision, data, security, platform, and partner teams.

Lead the architecture and technical strategy for Affirm’s high-volume observability platform. Design telemetry pipelines and sampling strategies, improve reliability and cost efficiency, integrate observability into AI-assisted development, and drive platform adoption across engineering teams. Remain hands-on while mentoring six engineers, leading cross-functional initiatives, establishing engineering standards, and overseeing monitoring, alerting, on-call operations, and system availability.

Staff Software Engineer responsible for leading design and delivery of large-scale order platform capabilities spanning cloud and point-of-sale systems. The role drives architecture, performance, reliability, API design, code quality, incident response, and technical roadmap alignment. It also requires cross-team collaboration, domain expertise in order processing and synchronization, mentoring engineers, and using AI-assisted development tools to improve productivity.

Lead frontend technical strategy for Affirm’s checkout decision orchestration systems. Design and architect scalable web applications, guide major technical initiatives, improve reliability and operational processes, establish engineering quality standards, collaborate with product, design, and analytics, and mentor engineers. The role focuses on building fast, clear, and reliable checkout experiences using modern declarative UI frameworks.

Own full-stack HR Experience features from technical design through deployment and monitoring. Build maintainable frontend, backend, and data-layer solutions; participate in code reviews, planning, reliability improvements, on-call response, and incident management. Partner with product and design, mentor less-tenured engineers, and independently deliver projects with minimal oversight.

Lead organization-wide technical initiatives for Gusto’s API and AI agent platform. Design reliable, scalable API contracts and agent-facing tools, write clean Ruby on Rails code, mentor engineers, improve reliability and observability, engage developer customers, and troubleshoot production issues.

Staff Software Engineer leading customer-centric, AI-native product development from discovery through production and adoption. Responsibilities include partnering with customers, product, and design; forming and testing product hypotheses; building new product surfaces; designing scalable architectures; using LLMs, agents, retrieval, and evaluation tooling; instrumenting outcomes; setting technical standards; mentoring engineers; and driving iterative delivery.

Lead the design, development, and operation of integrations and API products. Establish standards for API contracts, authentication, authorization, versioning, reliability, observability, documentation, and developer experience. Drive cross-team system architecture, production readiness, scalability, security, and resilience while mentoring engineers and aligning technical decisions with product and business goals.

Staff Software Engineer responsible for designing and developing backend services, APIs, and data models powering healthcare scheduling and availability systems. The role leads architecture for complex, scalable scheduling logic, drives cross-team technical initiatives, ensures operational excellence, collaborates with product and design teams, mentors engineers, and contributes to engineering quality. Primary technologies include C#/.NET and AWS, with opportunities to work across the stack using React and TypeScript.

Leads development of resilient, scalable features across Toast’s enterprise Sports and Entertainment platform, including backend, frontend, and POS systems. Responsibilities include designing, deploying, testing, monitoring, and maintaining production services; leading complex technical projects; collaborating with Product, Design, Customer Success, Sales, and other teams; mentoring engineers; and using AI tools to improve development productivity.

Build and architect Clear Street Active, a high-performance trading platform for active traders. Develop responsive web interfaces integrating real-time market data, low-latency execution workflows, and advanced trading tools. Collaborate with cross-functional teams on large-scale initiatives while emphasizing scalability, performance, API quality, maintainability, and developer experience.

Build and operate headless Shopify e-commerce experiences for Lume and Mando. Lead storefront initiatives, own technical quality, make architecture decisions, integrate third-party SaaS platforms, debug across the stack, and improve performance, reliability, observability, and testing. Translate business needs into technology, build consensus across teams, create reusable engineering frameworks and documentation, and mentor less experienced engineers. The role focuses on storefront performance, subscriptions, loyalty, experimentation, and revenue-generating digital commerce.

Build scalable, privacy-safe advertising signals and measurement systems for Snap’s ad platform. Lead end-to-end software and infrastructure initiatives involving signal ingestion, identity matching, data pipelines, measurement, and advertiser ROI analysis. Provide technical direction across teams, optimize availability, scalability, performance, security, and cost, and collaborate with product, machine learning, and advertising partners. Mentor engineers and apply modern AI-assisted development practices while delivering reliable production services.