Top Senior Java Engineer Jobs in NYC, NY

Lead design and delivery of high-throughput, fault-tolerant backend systems for Aladdin. Build microservices, streaming architectures, and distributed applications; collaborate with product and global teams; apply test-driven development, perform code reviews, and provide production support while mentoring engineers and driving technical roadmap.

The Senior Lead Data Engineer designs and develops technical solutions, leads a team of developers, and utilizes big data and cloud technologies to deliver robust solutions for Capital One.

As a Senior Software Engineer at Squarespace, you will build scalable backend services, write clean and efficient code, and contribute to architecture discussions while collaborating with cross-functional teams.

Lead development and maintenance of an e-trading rates derivatives platform. Design architecture, implement business logic and services, own features from requirements through rollout, fix bugs, build QA automation and frameworks, partner with business leaders, and recommend tools and processes to optimize engineering delivery.

Design, develop, and improve high-quality software solutions, ensuring collaboration, adhering to secure coding practices, and leading architectural decisions in Capital Markets technology.

Design, implement, and evolve scalable Java backend services powering Squarespace's Email product. Lead architecture and system design, build RESTful APIs, ensure reliability and observability, mentor engineers, troubleshoot production incidents, participate in on-call rotations, and collaborate cross-functionally to deliver customer-facing email capabilities.

Design and develop backend systems for a trading platform, implement low-latency components, collaborate with teams, and maintain automated test suites.

Design, develop, and maintain high-performance Java microservices using Spring Boot. Implement threading/concurrency, fault-tolerance (Hystrix/circuit breakers), observability (SLI/SLO), and event-driven solutions with Kafka. Deploy and operate services on Kubernetes and AWS, mentor junior developers, and collaborate with cross-functional teams to deliver reliable, scalable features.

Lead modernization and migration of legacy Struts 1 applications to modern Java platforms. Design, develop, and maintain scalable Java 21 applications using Spring 6 and REST APIs, troubleshoot production issues, participate in code reviews, and collaborate with cross-functional teams to deliver high-quality software.

Lead reverse-engineering of TIBCO BW/MFT processes, document business rules, and reimplement them as modular Java/Spring Boot microservices. Migrate protocols to Kafka/RabbitMQ/REST, ensure data consistency, and perform performance testing to match legacy SLAs.

Design and build Java/J2EE solutions using Spring and APIs; develop webservices, DB schemas, PL/SQL and transactional SQL in DB2/Oracle; collaborate with architects, developers and DevOps to implement CI/CD (Jenkins, uDeploy), ensure code quality (Sonar), perform code reviews and testing, resolve technical roadblocks, and drive process improvements. Requires strong communication and teamwork.

Senior Java Engineer responsible for designing and delivering high-quality, low-maintenance software. Coach client teams on modern development practices, apply test-driven development, collaborate in small teams, and pursue continuous learning to improve scalable, maintainable applications.

Remote Senior Java Developer responsible for building Java web applications using JSP and Struts2/MVC, creating reports with Jasper or SSRS, and managing Linux application servers (load balancers, JBoss, Apache, WildFly).

As a Market Data Sr. Java Developer, you'll build market data capabilities and services, interact with various teams, and maintain code quality while managing the software delivery lifecycle.

Build and maintain cloud-ready, low-latency trade and positions services for TAPE 2.0. Design scalable distributed systems, integrate client APIs (Java, C++, Python), use distributed caching and Kubernetes, contribute frontend work in Angular, and support CI/CD, monitoring, and documentation.

The Senior Java Developer will design, develop, and implement custom software solutions in Agile teams, mentor juniors, and ensure product quality.

Develop and maintain applications using Java and related technologies, while also working with Angular JS and Node JS frameworks.

Design, build, and maintain scalable Java/Spring Boot microservices and responsive front-end applications (React preferred). Implement APIs, ensure security and observability, optimize performance, write automated tests, contribute to CI/CD, and collaborate within Agile teams to deliver production-grade, cloud-deployed systems.

Optimize and scale blockchain node performance, design and implement core system plugins, collaborate with cross-functional teams, conduct performance testing and debugging, and stay current on blockchain and distributed systems technologies to maintain reliable infrastructure.

Leads the entire application lifecycle, translating requirements into solutions, designing, developing, testing, and implementing technology solutions aimed at improving operations.

Design, develop and operate microservice-based components for a derivatives exchange platform. Collaborate with product, security and DevOps teams to build scalable, secure back-end systems with automated testing, CI/CD, and rapid deployment. Participate in code audits, testing, release, and cross-stack problem solving; optimize and implement trading models and products.

As a Tech Lead, you will spearhead the backend tech vision, mentor junior engineers, collaborate with teams, and improve Java Spring Microservices.

Responsible for leading requirements analysis, creating solution design documents, developing scalable Java solutions, and maintaining ongoing solutions optimization.

The role involves improving Elasticsearch's distributed components, maintaining cluster coordination systems, and addressing complex issues to optimize performance and scalability.

The Senior Data Engineer will design and implement data processing pipelines using Java and Spark, optimize performance, and mentor junior engineers while ensuring compliance with data governance standards.