Senior Software Engineer

KellyMitchell Group; Celebration (FL); Hybrid; USD 76,000 - 109,000; Full time

Benefits offered by this job

Medical Insurance

Dental Insurance

Vision Insurance

Employee-Owned Profit Sharing (ESOP)

401K offered

Job summary

KellyMitchell is seeking a Senior Software Engineer to join a hybrid team in Celebration, FL. The role focuses on supporting a portfolio of middleware, .NET and Java/Spring Boot services, and migrating .NET components to Java throughout the project lifecycle.

The successful candidate will work across full-stack layers, including REST middleware, cloud deployments, and modern front-end integration, with a mix of legacy and greenfield initiatives in a fast-paced environment.

Qualifications

• 7+ years of related software engineering experience.
• Mastery of Java with Spring and open-source technologies such as Tomcat, Nginx, and Elasticsearch.
• Experience with Angular and modern front-end development, including TypeScript, component-based architecture, and REST API integration.
• Experience with C# and .NET Framework and/or .NET Core, including the ability to read, debug, and refactor legacy .NET codebases while delivering equivalent Java/Spring implementations.
• Experience with the full application development lifecycle, including unit testing, code reviews, documentation, and Agile delivery.
• Experience with build and deployment technologies such as Jenkins, GitLab, Harness CI/CD, and Docker.
• Experience with AWS, Kubernetes, and Rancher, as well as monitoring and logging tools such as Grafana, AppDynamics, and Splunk.

Responsibilities

• Participate in the analysis, design, development, debugging, and modification of complex software applications and enhancements
• Design, develop, test, and implement highly scalable software components, fixes, improvements, and new systems and applications
• Build and support REST middleware integrating enterprise consumers
• Maintain and enhance existing .NET applications, including bug fixes, enhancements, and production support
• Plan and execute migrations of .NET services to Java/Spring Boot, including legacy code analysis, API parity, testing, and cutover support
• Participate in the design, testing, deployment, and production support of mission-critical scheduled jobs and services
• Collaborate with engineers, product partners, users, and cross-functional teams to define system requirements and deliver technical solutions

Skills

Java

Spring Framework

REST API

Angular

TypeScript

C#/.NET

Jenkins

GitLab

Docker

Kubernetes

AWS

Tools

Tomcat

Nginx

Elasticsearch

Docker

Kubernetes

Grafana

Splunk

Job description

Job Summary

Our client, a leading entertainment and experiences organization, is seeking a Senior Software Engineer to join their team. This role will support a portfolio of mission-critical middleware, applications, scheduled jobs, and reporting solutions. The environment includes existing .NET applications alongside greenfield Java/Spring Boot services, with a key focus on supporting ongoing .NET applications and participating in .NET-to-Java/Spring Boot migration initiatives.

Contract Details

Contract length: 1-year contract Location: Celebration, FL Work Arrangement: Hybrid, 2 days per week onsite required

Core Responsibilities

• Participate in the analysis, design, development, debugging, and modification of complex software applications and enhancements
• Design, develop, test, and implement highly scalable software components, fixes, improvements, and new systems and applications
• Build and support REST middleware integrating enterprise consumers
• Maintain and enhance existing .NET applications, including bug fixes, enhancements, and production support
• Plan and execute migrations of .NET services to Java/Spring Boot, including legacy code analysis, API parity, testing, and cutover support
• Participate in the design, testing, deployment, and production support of mission-critical scheduled jobs and services
• Collaborate with engineers, product partners, users, and cross-functional teams to define system requirements and deliver technical solutions

Required Skills/Experience (Must-Haves)

7+ years of related software engineering experience Mastery of Java with experience in Spring and open-source technologies such as Tomcat, Nginx, and Elasticsearch Experience with Angular and modern front-end development, including TypeScript, component-based architecture, and REST API integration Experience with C# and .NET Framework and/or .NET Core, including the ability to read, debug, and refactor legacy .NET codebases while delivering equivalent Java/Spring implementations Experience with the full application development lifecycle, including unit testing, code reviews, documentation, and Agile delivery Experience with build and deployment technologies such as Jenkins, GitLab, Harness CI/CD, and Docker Experience with AWS, Kubernetes, and Rancher, as well as monitoring and logging tools such as Grafana, AppDynamics, and Splunk

Preferred Skills/Experience (Nice-to-Haves)

Experience with strangler-fig or incremental migration patterns Experience supporting parallel runs, feature flags, and phased application cutovers Familiarity with event-driven and messaging architectures such as Kafka, SNS/SQS, JMS, or similar Knowledge of API security best practices, including OAuth and JWT Knowledge of distributed systems security, including TLS and secrets management

Key Competencies & Behaviors

Strong problem-solving and debugging skills Strong communication skills and attention to detail Effective collaboration with engineers, product partners, external partners, and contractors Ability to work effectively within an Agile development environment Ability to support complex, mission-critical applications and production environments

Work Environment

Location: Celebration, FL Hybrid: Onsite 2 days per week, currently Tuesdays and Fridays, subject to change Contract Duration: 1 year

Compensation & Benefits

Pay Range: The approximate pay range for this position is between $55.00 and $79.00. Please note that the pay range provided is a good faith estimate. Final compensation may vary based on factors including but not limited to background, knowledge, skills, and location. We comply with local wage minimums Medical, Dental, & Vision Insurance Plans Employee-Owned Profit Sharing (ESOP) 401K offered

About KellyMitchell

At KellyMitchell, our culture is world class. We’re movers and shakers! We don’t mind a bit of friendly competition, and we reward hard work with unlimited potential for growth. This is an exciting opportunity to join a company known for innovative solutions and unsurpassed customer service. We're passionate about helping companies solve their biggest IT staffing & project solutions challenges. As an employee-owned, women-led organization serving Fortune 500 companies nationwide, we deliver expert service at a moment's notice.