Top Tech Jobs & Startup Jobs in NYC, NY

Senior .NET engineer to design and build web applications and RESTful APIs using ASP.NET (MVC/Web API) and .NET Core. Responsibilities include front-end work (HTML5/CSS3/JavaScript), database design and SQL development, participating in complex scalable project design, using Git, and writing unit/integration/functional tests.

Hands-on lead developer/technical architect responsible for coding (.NET Core/.NET 8+), designing Azure-first architectures, building microservices and APIs, implementing Azure PaaS services and monitoring, performing code reviews and mentoring, troubleshooting production issues, and coordinating delivery with onshore/offshore teams.

Provides mainframe patch-management expertise using SMP/E and z/OSMF. Responsibilities include CVE reporting, patch automation, response modeling, validation cadence, package stability reviews, dashboard improvements, baseline dataset development, vulnerability-tool integration, and secure patch deployment. The role also develops AI-driven prompts and automation for testing, RFB validation, and impact analysis while supporting z/OS and ISV software installation, maintenance, customization, and testing.

Administer and troubleshoot IBM z/OS network systems and connectivity, including VTAM, TCP/IP, TN3270, FTP, Policy Agent, and SMTP. Manage TSO, ISPF, JCL, VSAM, catalogs, and JES2 operations. Develop automation scripts and monitoring or reporting tools, support MQ, DB2, CICS, file transmission, printing, and email infrastructure, and collaborate with enterprise network and security teams.

Administer and support IBM z/OS environments, including installations, upgrades, maintenance, lifecycle management, and complex troubleshooting. Use SMP/E for software maintenance, PTFs, APARs, and HOLDDATA processing. Develop REXX automation and administer z/OSMF services and workflows. Monitor performance, availability, capacity, and system health; support upgrades, migrations, disaster recovery testing, production operations, and on-call activities. Collaborate across infrastructure teams, maintain technical documentation, and mentor other mainframe administrators.

Validate and implement AI fencing controls across z/OS environments through adversarial testing, monitoring, alerting, forensic analysis, and sanitized validation. Design disruptive AI testing labs, test non-privileged user operations, support secure AI adoption, and assess GenieZ production readiness. Requires deep z/OS internals expertise, catalog management, USS security, software installation, complex troubleshooting, advanced testing, REXX, Python, and 10+ years of experience.

Design, build, test, and maintain scalable web applications. Create responsive UIs with Angular or React (TypeScript), implement Python/Flask backends and RESTful APIs, design relational schemas, troubleshoot production issues, perform code reviews, and mentor junior developers.

Lead enterprise data discovery, inventory, classification and governance initiatives. Evaluate and run POCs for tools (OneTrust, BigID, Varonis, Cyera, Delphix, RecordPoint, Collibra, Microsoft Purview). Conduct stakeholder workshops, assess classification accuracy, security, scalability, integrations, and metadata flow. Produce recommendations, feasibility assessments, roadmaps, and support Collibra integration.

Provide operational SAP HANA and SAP S/4HANA administration including installation, upgrades, patching, backup/recovery, system replication, performance tuning, monitoring, and troubleshooting. Support SAP Basis, SDI/Smart Data Integration, Cloud Connector, and SAP Analytics Cloud integrations. Manage certificates/SSL, networking connectivity, documentation, runbooks, incident response, change management, disaster recovery, capacity planning, and on-call support in regulated enterprise environments.

Manage and administer ARO/OpenShift clusters, design scalable Kubernetes deployment patterns with Helm, build reusable Helm charts, implement ArgoCD/GitOps CI/CD pipelines, configure service mesh (Istio/Linkerd), write/manage manifests and operators, onboard application teams, and monitor/troubleshoot platform performance.