Senior Java Developer

Quantum Technologies. LLC; Jersey City (NJ); On-site; USD 120,000 - 160,000; Full time

Job summary

Quantum Technologies LLC in Jersey City seeks an experienced Senior Java Developer to lead the design and development of scalable, enterprise-grade full-stack applications within the BI & Enterprise Reporting team. You will drive API-driven architectures, mentor developers, and collaborate with cross-functional teams using Jira and Confluence.

The role focuses on hands-on development in Java/J2EE, RESTful and SOAP services, and Angular front-end work, with responsibilities spanning architectural

Qualifications

• Strong experience with Java/J2EE in enterprise environments.
• Experience designing API-driven, microservices-based solutions.
• Frontend integration with Angular and modern web standards.

Responsibilities

• Lead design, development, and implementation of full-stack Java applications.
• Architect API-heavy services via REST/SOAP and microservices.
• Document Low-Level Designs aligned with architecture standards.
• Apply design patterns to build scalable, reusable software.
• Develop reusable components across applications and ensure frontend-backend integration.
• Conduct code reviews and enforce coding standards.

Skills

Java

Spring/J2EE

Angular

API design

Microservices

Cloud

CI/CD

Leadership

Tools

Jira

Confluence

Job description

US Citizen, Green Card, H-1B, OPT-EAD, CPT, Other

Work Authorization:US Citizen, Green Card, OPT-EAD, CPT, H-1B, H4-EAD, Other

Job Description:

We are seeking a highly experienced full stack Senior Java Developer to lead the design and development of scalable, high-performance, enterprise-grade full stack application in our BI & Enterprise Reporting team. This role requires deep hands-on expertise in Java/J2EE, API-driven architecture, and modern front-end frameworks (Angular), along with strong architectural and problem-solving skills. The ideal candidate will be responsible for translating business and technical requirements into robust application designs, driving best practices across the development lifecycle, and ensuring high-quality, secure, and maintainable solutions. This position involves close collaboration with cross-functional teams, mentoring developers, and playing a key role in technical decision-making.

Main areas of responsibilities:

• Lead the design, development, and implementation of Java-based, full-stack web applications - emphasis on hands on development.
• Architect and develop API-heavy, service-oriented and microservices-based applications using RESTful and SOAP web services.
• Design and document Low-Level Designs (LLD) aligned with high-level architectural standards.
• Apply appropriate design patterns and architectural principles to build scalable, reusable, and maintainable solutions.
• Develop and promote reusable components and frameworks across multiple applications.
• Ensure seamless integration between front-end (Angular) and back-end services.
• Perform code reviews, enforce coding standards, and ensure internal quality assurance for application components.
• Analyze and resolve complex production issues, often under tight timelines and high-pressure situations.
• Collaborate with product owners, business analysts, and stakeholders to understand and clarify requirements using tools such as Jira and Confluence.
• Support CI/CD pipelines and deployment processes in containerized and cloud-native environments.
• Mentor junior and mid-level developers and provide technical guidance to the development team.
• Continuously evaluate and recommend improvements to application architecture, performance, and security

Nice to have attributes:

• Experience in microservices architecture and domain-driven design (DDD).
• Experience developing API-centric applications and integrating distributed systems.
• Solid experience in front-end development using Angular (version 17 or above) and modern web standards.
• Strong understanding of relational database design, especially Oracle, including writing optimized and efficient SQL queries.
• Knowledge of security best practices, including authentication, authorization, and secure API design.
• Experience with CI/CD automation, DevOps practices, and infrastructure-as-code concepts.
• Familiarity with performance tuning, profiling, and monitoring tools.
• Prior experience in a technical leadership role.
• Strong mentoring skills and experience leading or guiding development teams.
• Exposure to Agile/Scrum methodologies.
• Excellent documentation and presentation skills.

We are an equal opportunity employer. All aspects of employment including the decision to hire, promote, discipline, or discharge, will be based on merit, competence, performance, and business needs. We do not discriminate on the basis of race, color, religion, marital status, age, national origin, ancestry, physical or mental disability, medical condition, pregnancy, genetic information, gender, sexual orientation, gender identity or expression, national origin, citizenship/ immigration status, veteran status, or any other status protected under federal, state, or local law.