Senior Software Engineer

ROGER S-B. CRERIE

*** ***** ****.

Virginia Beach, VA 23456

Cell: 978-***-****

Email: ********@*******.***

LinkedIn Page: http://www.linkedin.com/in/rogercrerie

OBJECTIVE

Senior Software Engineer with 20+ years of experience architecting and optimizing scalable, high-availability backend systems. Proven expertise in Java, C#, and other object-oriented languages, with a track record of enhancing data pipelines and distributed systems. Committed to delivering reliable, high-throughput solutions while mentoring teams and driving continuous improvement.

SKILLS

•Programming Languages: Java, C#, C++, C, Python, Groovy

•Frameworks & Libraries: Spring Boot, Hibernate, Java Multithreading, Java Swing, REST, JSON, XML(Java XML and C), Docker, Apache Derby, Kafka

•Tools & Platforms: Git, SVN, Eclipse, Atlassian toolset (Jira, Confluence, Bitbucket), Virtualization

•Database & Data Engineering: MySQL, DB Design, Data Engineering

•Software Engineering: Software Engineering Fundamentals

•Systems & Distributed: Distributed Systems

•DevOps & Technologies: DevOps Technologies, AWS

EMPLOYMENT

Nectar Services Corp. Nov 2018 - Aug 2024

Senior Software Engineer Jericho, NY

Developed and maintained Java-based APM and DX products, ensuring high availability and reliable data collection across the platform.

•Optimized communications using multiple protocols and external APIs (Avaya, Cisco, Tandberg, Genesys, Microsoft) to ingest data efficiently.

•Managed SNMP data collection and trap handling to support real-time monitoring.

•Implemented data storage solutions into Derby databases using Hibernate, enhancing system throughput and reliability.

•Engineered proprietary channel communication to deliver critical data to client applications.

•Supported legacy Java Swing and AWT client systems to maintain uninterrupted service.

•Enhanced real-time device monitoring through proprietary communications, enabling remote command execution and hardware access.

Hitachi Vantara Jul 2014 - Sep 2018

Senior Software Engineer Waltham, MA

Contributed to multi-language projects (Java, C++, C, C#, .NET, Python) to build high availability systems focused on data security and processing.

•Architected and designed the Hitachi Vantara Security Suite with a Swing based UI and integrated JIRA, emphasizing robust engineering fundamentals.

•Developed enhancements for SNMGW2, including a CLI interface with internal locking mechanisms to ensure data integrity in distributed environments.

•Created and executed Python-based test suites for validating high-reliability features in SNMGW2.

•Upgraded and maintained the HAPRO application by integrating C++ server-side enhancements with C# UI improvements, ensuring consistent data protection.

•Designed and implemented a PowerShell library for MS Exchange configurations, reinforcing distributed system support and com- prehensive data storage strategies.

Nectar Services Corp. Feb 2012 - Jul 2014

Senior Software Engineer Burlington, MA

Engineered server and client side Java applications to monitor and manage networking, VoIP, MS Lync, and video devices, focusing on high-throughput data ingestion.

•Integrated communications across multiple protocols (Avaya, Cisco, Tandberg, Microsoft) to reliably gather and process data.

•Implemented SNMP data collection with robust trap handling for resilient system monitoring.

•Designed data storage solutions using Derby and MS databases to ensure scalable data management.

•Developed proprietary channel communications to stream data to client applications with minimal latency.

•Created user-friendly interfaces using Java Swing and AWT to facilitate efficient system interactions.

•Mentored junior developers on coding standards and best practices, reinforcing strong software engineering fundamentals.

•Played a pivotal role in driving the design and feature development for a next-generation monitoring product.

Oracle Corporation May 2010 - Feb 2012

Software Engineer (Oracle Virtual Machine Team) Nashua, NH

Developed middleware solutions for Oracle Virtual Machine 3.0, focusing on the core components that communicated between server infrastructures and client UIs.

•Enhanced data consistency by upgrading Oracle DB objects, ensuring reliable data management in virtualized environments.

Sun Microsystems

Nov 2005 - Jan 2010

Software Engineer (Logical Domain Virtualization Team) Burlington, MA

Designed and implemented LDoms Manager software enhancements, emphasizing robust distributed system principles.

•Developed external libraries and tools to support LDoms, focusing on high availability and data integrity.

•Implemented automatic MAC allocation with collision detection to ensure reliable network communications.

•Created XML Schemas for asynchronous command and event messaging to support scalable distributed workflows.

•Developed Java-based XMPP client and server components for critical third-party communications.

•Redesigned the LDoms Initial Configuration tool to improve operational efficiency and user experience in virtualized environments.

•Engineered a full Java GUI Management tool for streamlined LDoms configuration and ongoing maintenance.

Sun Microsystems Jan 1999 - Nov 2005

Software Engineer (Volume Server Products OS) Burlington, MA

Contributed to the creation and release of four major Sun products, emphasizing scalable and high-performance engineering solutions.

•Created device drivers with support for I2C Child devices, TOD hardware, and watchdog code to enhance hardware communication reliability.

•Diagnosed and resolved i2c nexus issues on the BootBus controller ASIC to improve system throughput.

•Developed and maintained environmental subsystems for fan speed regulation, temperature monitoring, hotplug detection, and power supply oversight.

•Authored test programs for hardware debugging during product bring-up and manufacturing, ensuring system readiness and reliability.

Digital Equipment Corporation Jun 1997 - Dec 1998

Part Time (Network Adapters)

Supported Ethernet adapter cards (10Mb, 100Mb, Gigabit) across multiple operating systems to ensure high availability network performance.

•Conducted driver testing, installed and scripted driver configurations, and provided comprehensive PC hardware and software support.

•Built driver kits and performed throughput and CPU utilization testing, contributing to performance enhancements through detailed PCI bus analysis.

EDUCATION

Worcester Polytechnic Institute

Dec 1998

BS, Computer Science

•GPA: 3.0

Worcester State College

1994 - 1996

BS, Computer Science

•GPA: 3.9

•Achievements: Transferred.

Fort Dix, New Jersey

1991

Motor Transport Operators Course

Fort Dix, New Jersey

1990

Basic Training

Green Run High School, Virginia Beach, Virginia

1990

Advanced Diploma

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