Lead Java Full Stack Developer at New York

IPolarity•Whippany, NJ

2d•Onsite

About The Position

IPolarity LLC is seeking an experienced, hands-on Lead Java Full Stack Developer to design, build, and scale enterprise-grade, API-first platforms using modern Java technologies, AWS cloud services, and AI-driven solutions. The position is onsite in New York and calls for technical leadership, architectural expertise, independent delivery of scalable enterprise solutions, and the ability to translate business requirements into secure, scalable technical solutions. The developer will mentor other developers and collaborate with cross-functional teams, while communicating effectively with stakeholders.

Requirements

12 or more years of professional software engineering experience.
Strong expertise in Java 11/17/21, Spring Boot, REST APIs, JSON, and OpenAPI.
Extensive experience designing and developing microservices and API integrations.
Strong frontend development experience with ReactJS, TypeScript, JavaScript, Node.js, and WebSockets.
Hands-on experience with event-driven architecture and messaging platforms such as Kafka, AWS SNS, and SQS.
Strong AWS cloud-native architecture and development experience.
Experience with Agentic AI, LLMs/SLMs, MCP, RAG, and AI orchestration frameworks.
Experience with Docker, Kubernetes, ECS/EKS, and serverless computing.
Strong understanding of CI/CD pipelines, Jenkins, Spinnaker, Terraform, and automated deployments.
Experience with SQL and NoSQL databases, including PostgreSQL, MySQL, Aurora, DynamoDB, and DocumentDB.
Strong technical leadership and architectural skills.
Ability to independently design and deliver scalable enterprise solutions.
Excellent communication and stakeholder management skills.
Experience mentoring developers and collaborating with cross-functional teams.
Ability to translate business requirements into secure, scalable technical solutions.

Nice To Haves

Python experience for AI/LLM engineering.
Experience with API versioning, schema evolution, and contract testing with Pact or WireMock.
Experience with production monitoring and observability using Splunk, Dynatrace, Grafana, and CloudWatch.
Experience with performance tuning, JVM optimization, and application scalability.
Experience with security practices involving IAM, KMS, WAF, OAuth, and secrets management.
Experience with AI-assisted coding tools such as GitHub Copilot and Claude.

Responsibilities

Design, build, and scale enterprise-grade, API-first platforms using Java technologies, AWS cloud services, and AI-driven solutions.
Design and develop microservices and API integrations.
Develop frontend applications using ReactJS, TypeScript, JavaScript, Node.js, and WebSockets.
Build and work with event-driven architectures and messaging platforms.
Design and develop cloud-native solutions on AWS.
Work with AI technologies and frameworks, including Agentic AI, LLMs/SLMs, MCP, RAG, and AI orchestration frameworks.
Use containers, orchestration platforms, and serverless computing.
Develop and maintain CI/CD pipelines and automated deployments.
Work with SQL and NoSQL databases.
Apply API versioning, schema evolution, and contract testing practices.
Monitor and improve production systems using observability tools.
Tune performance, optimize JVM usage, and improve application scalability.
Apply security practices involving identity and access management, encryption, web application firewalls, OAuth, and secrets management.
Independently design and deliver scalable enterprise solutions; mentor developers and collaborate with cross-functional teams.
Translate business requirements into secure, scalable technical solutions and manage stakeholder communications.