Role: Senior Java Engineer – AS400 & Application Development
Duration: Longterm
Location: NJ-based, (Remote)
Experience: 15+ years total
Engagement: Multi-application support and project delivery
Visa: Any Visa is fine
Role Summary:
We are looking for a senior Java engineer with deep L3 and L4 support experience and extensive hands-on work on the IBM i (AS400) platform. The role combines production support, complex solution development, and architectural input across multiple business applications. You will resolve escalated incidents, drive root cause analysis, enhance existing systems, and contribute to project delivery in a structured ITIL-governed environment.
Key Responsibilities:
- Provide L3 and L4 support for business-critical applications: troubleshoot escalated incidents, perform root cause analysis, and implement permanent fixes.
- Design, develop, and deploy complex Java-based solutions and integrations, including those that interface with IBM i / AS400 systems.
- Contribute to solution design and architecture: review technical designs, recommend patterns, and guide modernization and integration decisions.
- Support and enhance multiple applications concurrently, prioritizing effectively across incidents, problems, changes, and project work.
- Participate actively in projects from requirements and design through build, testing, deployment, and hypercare.
- Manage incidents, problems, changes, and service requests in ServiceNow in line with ITIL processes and SLAs.
- Plan and track work in JIRA (stories, tasks, defects, sprints, boards, dashboards).
- Perform code reviews, enforce coding standards, and mentor junior and mid-level engineers.
- Create and maintain technical documentation, runbooks, knowledge articles, and support handover material.
- Collaborate with business users, QA, DevOps, infrastructure, and vendor teams; communicate status and risks clearly to stakeholders.
- Participate in on-call or shift rotations and major incident bridges as required.
Required Qualifications:
- 15+ years of total IT experience, with strong Java development and support experience.
- Proven L3 and L4 support background: complex defect analysis, code-level fixes, performance tuning, and vendor escalation handling.
- Extensive hands-on experience on the AS400 / IBM i platform.
- Experience writing complex solutions and some level of architecture experience (solution design, integration design, technical leadership).
- Demonstrated ability to support multiple applications at the same time and engage in project work.
- Full understanding of ITIL: incident, problem, change, release, and knowledge management, SLAs, and major incident handling (ITIL v3/v4 certification preferred).
- Hands-on experience with ServiceNow (SNOW) for ITSM and JIRA for work management.
- Excellent analytical, communication, and stakeholder management skills.
Technical Skills
Core Java and frameworks
- Java 8 / 11 / 17+, OOP, multithreading and concurrency, collections, streams, JVM tuning and memory management
- Spring Framework, Spring Boot, Spring MVC, Spring Data, Spring Security, Spring Batch, Spring Cloud
- Hibernate / JPA, MyBatis, JDBC
- Jakarta EE (Servlets, JSP, EJB, JMS), legacy Struts exposure a plus
Web services and integration
- REST and SOAP web services, JSON / XML, Swagger / OpenAPI
- Messaging: JMS, Apache Kafka, ActiveMQ, RabbitMQ, IBM MQ
- Integration patterns, ESB / middleware exposure (Oracle SOA/OSB, MuleSoft, or similar)
- Microservices architecture, API gateway concepts, OAuth2 / JWT
IBM i / AS400
- IBM i (AS400) architecture, DB2 for i, libraries, objects, and job management
- RPG / RPGLE, CL, COBOL awareness; reading and troubleshooting legacy code
- JT400 / JTOpen toolkit, JDBC to DB2 for i, data queues, program calls, and Java-to-RPG integration
- Batch job scheduling, spool file handling, and performance analysis on IBM i
- Modernization approaches: API enablement, service wrapping, and incremental refactoring
Databases
- DB2, Oracle, SQL Server, or PostgreSQL; advanced SQL, stored procedures, query tuning and indexing
Build, DevOps, and quality
- Maven / Gradle, Git, Bitbucket / GitHub / GitLab, Jenkins or equivalent CI/CD
- JUnit, Mockito, integration testing, SonarQube / code quality tools
- Docker; Kubernetes and cloud (AWS / Azure / OCI) exposure a plus
- Application servers and web servers: WebLogic, WebSphere, Tomcat, JBoss, Apache / Nginx
Monitoring and troubleshooting
- Log analysis, thread and heap dump analysis, profiling and performance tuning
- Monitoring and APM tools such as Splunk, ELK, Dynatrace, AppDynamics, or New Relic
Service management and delivery tools
- ServiceNow (incident, problem, change, knowledge, reporting), JIRA, Confluence
- ITIL-aligned processes, SLA and KPI reporting, RCA and problem record documentation
Preferred Qualifications
- ITIL Foundation or higher certification; Oracle or Java certifications
- Experience in retail, publishing, distribution, or ERP-integrated environments
- Exposure to Agile / Scrum and hybrid support-plus-project delivery models
- Experience modernizing or migrating legacy platforms
- Experience working with onshore/offshore delivery teams
Soft Skills
- Strong ownership and accountability for production stability
- Calm and structured under major incident pressure
- Clear written and verbal communication with technical and business audiences
- Ability to mentor and influence without formal authority
- Self-driven, able to context-switch across applications and priorities
Additional Information
All your information will be kept confidential according to EEO guidelines.
Skills Required
- 15+ years of total IT experience
- Strong Java development and production support experience
- Proven L3 and L4 support experience, including defect analysis, code-level fixes, performance tuning, and vendor escalation
- Extensive hands-on experience with IBM i / AS400
- Experience writing complex solutions and contributing to solution or integration architecture
- Ability to support multiple applications concurrently and participate in project delivery
- Understanding of ITIL incident, problem, change, release, and knowledge management processes
- Hands-on ServiceNow experience
- Hands-on JIRA experience
- Excellent analytical, communication, and stakeholder management skills
- Java 8, 11, or 17+ with object-oriented programming, concurrency, collections, streams, JVM tuning, and memory management
- Spring ecosystem experience, including Spring Boot, MVC, Data, Security, Batch, or Cloud
- Experience with REST/SOAP services, messaging, integration patterns, and microservices
- IBM i knowledge including DB2 for i, RPG/RPGLE, CL, COBOL, job management, and Java-to-RPG integration
- Advanced SQL and experience with enterprise databases
- Build, version control, CI/CD, testing, and code quality tool experience
- Log analysis, troubleshooting, performance tuning, and monitoring/APM experience
- ITIL Foundation or higher certification
- Oracle or Java certification
- Experience in retail, publishing, distribution, or ERP-integrated environments
- Agile/Scrum experience
- Legacy platform modernization or migration experience
- Experience working with onshore/offshore delivery teams
What We Do
Technology Management Solutions (TMS, LLC), headquartered in Parsippany, New Jersey, is a premier IT company specializing in digital product engineering and innovative technology solutions. Since our inception in 2021, we have empowered businesses across industries—Financial Services, Retail, Medical, Entertainment, Manufacturing, and Automotive—to achieve their digital transformation goals. Our mission is to design and deliver cutting-edge solutions that drive growth, streamline operations, and enhance modern digital experiences.At TMS, we partner with our clients throughout the entire product development lifecycle, from ideation to commercialization. Our expertise spans next-generation technologies, including Artificial Intelligence (AI), Machine Learning (ML), Internet of Things (IoT), and custom software development. With tailored engagement models, we accelerate product development, ensuring faster time-to-market and measurable success.
