Sr Software Engineer(strong Java/Spring Boot + Angular and enough C#/.NET experience)(only w2)

Title: Sr Software Engineer

Location: Celebration, FL 34747

Duration: 12 Months Contract

Work schedule: Onsite 2 days per week (Tuesdays & Fridays)

Job Description:

About The Role & Team:

• The SEAS Team supports a portfolio anchored by Versonix's Seaware Reservation System. The portfolio includes mission-critical middleware, applications, scheduled jobs, and reporting. The team currently supports cruise line and vacation-related business services.
• The studio maintains existing .NET applications alongside greenfield Java/Spring Boot services. This role will support ongoing .NET maintenance and participate in .NET-to-Java/Spring Boot migration work.
• You will collaborate with engineers, product partners, and cross-squad SEAS teams as the team continues to grow.

What You'll Do:

• Participate in projects encompassing analysis, design, programming, debugging, and modification of software enhancements and/or new products used in local, networked, cloud-based, or Internet-related computer programs
• Responsible for performing testing and debugging of applications
• Code may be used in commercial and end-user applications or focus on software and tools supporting infrastructure and technology platforms
• Code at the component level
• Work typically involves large or highly sophisticated software programs and systems
• Possess a proven understanding of current programming language and technologies, with strong skills in writing code and completing programming tasks
• Interact with users to define system requirements and/or necessary modifications
• Design, develop, test, and implement highly scalable software components, fixes, improvements, and/or new systems and applications
• Build and support REST middleware integrating enterprise consumers
• Participate in design, testing, deployment, and production support of mission-critical scheduled jobs and services
• Maintain and enhance existing .NET applications in the SEAS portfolio (bug fixes, enhancements, production support)
• Plan and execute migration of .NET services to Java/Spring Boot, including analysis of legacy code, API parity, testing, and cutover support

Required Qualifications:

• Minimum 7 years of related work experience
• Mastery in Java and experience with industry-standard open-source technologies such as Spring, Tomcat, Nginx, and Elasticsearch
• Experience with Angular and modern front-end development (TypeScript, component-based architecture, and REST API integration)
• Exposure to C# and .NET (Framework and/or .NET Core)
• Ability to read, debug, and refactor legacy .NET codebases while delivering equivalent Java/Spring implementations
• Comfortable working in an agile environment and experience with Agile delivery (stand-ups, sprint planning, etc.)
• Experience with the full lifecycle of application development, including best practices of unit testing, code reviews, and documentation
• Experience with build and deployment technologies such as Jenkins, GitLab, Harness CI/CD, and Docker
• Experience with monitoring and logging tools such as Grafana, AppDynamics, and Splunk
• Experience working with cloud platforms and container orchestration technologies, including AWS, Kubernetes, and Rancher
• Able to work well with external partners and contractors
• Strong communication skills and attention to detail

Preferred Qualifications:

• Experience with strangler-fig or incremental migration patterns (parallel run, feature flags, phased cutover)
• Familiarity with event-driven and messaging architectures (e.g., Kafka, SNS/SQS, JMS, or similar)
• Knowledge of security best practices for APIs and distributed systems, including OAuth, JWT, TLS, and secrets management