Jeff Hennessey
Marshfield,United States
Summary
Senior Back-End Developer with over 12 years of experience specializing in Python, C# and .NET frameworks. Proven expertise in designing and developing scalable, high-performing back-end systems and APIs. Adept at collaborating with cross-functional teams to drive project success and enhance user experience. Committed to implementing secure development practices and ensuring compliance with industry standards. Enthusiastic about leveraging AI technology to create transformative software experiences.
Overview
13
13
years of professional experience
Work History
Sr. Software Engineer (Government Contractor)
IvoryCloud
Rockville, MD
09.2024 - Current
- Developed and maintained secure web applications using C#, ASP.NET, and Azure, ensuring compliance with industry security standards, resulting in a 30% increase in application reliability
- Implemented web services optimized for performance and scalability, enhancing operational efficiency by 30%
- Led initiatives focused on application security, utilizing SAST and DAST methodologies to identify and mitigate vulnerabilities, reducing security incidents by 40%
- Collaborated with cross-functional teams to gather requirements and deliver solutions that align with business objectives
- Conducted code reviews and mentoring sessions to improve code quality and team productivity
- Documented development processes and maintained clear communication with stakeholders to ensure project transparency
- Leveraged Docker for containerization of applications, streamlining deployment and scaling processes
- Integrated Node.js into the application stack for developing efficient server-side logic and services
- Worked with Python ETLs, utilizing Pandas for Data Manipulation and PyTest for automated testing
- Enhanced user interfaces using JavaScript and TypeScript, contributing to a more dynamic and responsive application experience
- Actively exploring AI technologies to enhance application features and user interactions
Senior Software Engineer & Quality Assurance Lead
505 Games
Calabasas, CA
02.2022 - 12.2023
- Developed and maintained robust back-end systems for 'Ghostrunner 2,' achieving a 95% bug-free release through effective quality assurance strategies
- Architected performance optimization solutions, improving rendering speeds by 40% and reducing load times by 30%
- Collaborated with product managers and front-end developers to enhance API integrations, resulting in a 25% increase in user engagement
- Implemented automated testing protocols that reduced testing time by 50% and increased test coverage by 35%
- Spearheaded the development of documentation and training materials for new features to assist team members and stakeholders
- Managed a team of engineers to ensure timely delivery of project milestones while maintaining high quality standards
Senior Software Engineer
TPNi
Norwood, MA
12.2011 - 12.2021
- Led the development of a comprehensive CMS platform using C# and ASP.NET, reducing event planning time by 50% and enhancing client satisfaction by 40%
- Designed and implemented a scalable microservices architecture, increasing system scalability by 70% and reducing server costs by 20%
- Developed RESTful APIs, handling over 1 million requests per day with 99.9% uptime, ensuring compliance with best practices
- Introduced a CI/CD pipeline that reduced deployment times by 70% and minimized release errors by 25%
- Conducted performance tuning and optimization of database queries, resulting in a 45% reduction in response times
- Implemented Docker containers for application deployment, improving scalability and consistency across environments
- Developed microservices using Node.js, enhancing system integration and performance
- Utilized JavaScript and TypeScript for building interactive user interfaces, improving client-side performance and user experience
- Familiarity with AWS services and deployment strategies
- Experience in designing systems that utilize event-driven architecture principles
Education
Skills
- C#
- Python
- JavaScript
- TypeScript
- SQL
- NET
- ASPNET
- React
- Angular
- HTML5
- CSS
- Bootstrap
- Git
- Docker
- Kubernetes
- Agile
- SCRUM
- Microservices
- Azure
- AWS
- SQL Server
- PostgreSQL
- NoSQL
- RESTful APIs
- CI/CD
- Nodejs
Additional Information
Passionate about making the Internet a safer place through technology and actively involved in initiatives that promote cybersecurity awareness., Experienced in early-stage startups, demonstrating flexibility and a hands-on approach to meet project demands in a fast-paced remote environment., Excellent communication and team collaboration skills, ensuring effective delivery of high-quality solutions.
Timeline
Sr. Software Engineer (Government Contractor)
IvoryCloud
09.2024 - Current
Senior Software Engineer & Quality Assurance Lead
505 Games
02.2022 - 12.2023
Senior Software Engineer
TPNi
12.2011 - 12.2021