Top Associate Software Engineer Jobs in NYC, NY

Design, develop, test, and maintain Azure-native software solutions using Java, Python, and JavaScript. Build CI/CD pipelines, integrate microservices and APIs, perform code reviews, lead testing/QA, troubleshoot production issues, and collaborate with cross-functional teams to align software with business requirements while mentoring others.

Develop and maintain customer-facing web and mobile features, collaborating with product, design, and backend engineers. Ensure scalable, performant, and maintainable code, write documentation, and perform code reviews while iterating quickly to deliver business impact.

12-week hands-on internship building full-stack features: frontend with React and TypeScript; backend services and REST APIs in Python (FastAPI); enterprise data integrations and ingestion pipelines; write tests, participate in Agile processes, code reviews, and troubleshoot production issues while learning AI and cloud technologies.

Design, develop, and implement features for the Marriott Bonvoy Android app. Collaborate with cross-functional product teams, participate in requirements and code reviews, follow development and governance processes, support deployments and production, and learn engineering best practices including security, Google design standards, and Agile/SAFe methodologies.

Design, develop, and implement features for the Marriott Bonvoy iOS app. Collaborate with cross-functional product teams, participate in code and requirements reviews, follow development and governance processes, support deployments and production activities, and learn mobile engineering best practices, Apple standards, and security requirements.

Build, test, and maintain automated data delivery jobs and CI/CD workflows that move data between internal systems, APIs, and integration partners. Retrieve, transform, validate, monitor, and troubleshoot data pipelines, write scripts/services, add alerting, participate in code reviews, and document integrations.

The System Engineer will manage, modernize, and integrate physical security platforms, ensuring reliability and compliance, while streamlining operations through automation and data management.

Design, build, and ship developer-facing SDKs: own public API, TypeScript types, packaging, semver, distribution, and docs. Build AI-powered automation workflows (LLM integrations), develop and test features, manage PR lifecycle, and collaborate with web, mobile, backend, product, and design teams to deliver reusable SDKs for other engineers.

Develop and maintain Jefferies' high-performance fixed-income e-trading platform focused on credit products. Build scalable, highly available real-time trading applications, support existing infrastructure (ION, Java, Kdb), collaborate with traders and quants to gather requirements, and champion SDLC and test-driven development while balancing delivery with governance and compliance.

Develop and maintain Linux user-space and driver-level software to integrate radio hardware (Wi‑Fi/cellular) into drone connectivity stacks. Implement logging and analysis of link metrics, collaborate with RF and embedded teams on rate-adaptation algorithms, run hardware-in-the-loop tests, and validate aerial connectivity performance.

Investigate and resolve client-reported technical issues across web and mobile platforms, perform scenario-based testing, monitor and debug RESTful services, assist with eligibility file processing and system monitoring, coordinate with global support teams, and participate in design and code reviews to ensure platform reliability and scalability.