David Stephens Software Engineer and Manager

Highly accomplished and results-driven Principal Software Engineer / Engineering Manager with 20+ years of full-stack development expertise across C#, Java, JavaScript, and SQL. Proven leader with a high EQ, excelling in mentoring, coaching, and managing high-performing engineering teams. Over a decade of hands-on experience designing, developing, and deploying robust, scalable, and secure cloud-native applications on Azure. Adept at architecting complex client/server systems, optimizing database performance, and driving technical innovation. Exceptional communicator passionate about building elegant solutions and fostering collaborative team environments.

• Languages: C#, Java, JavaScript, TypeScript, SQL, HTML, CSS, JSON, XML, PHP
• Cloud Platforms: Microsoft Azure (10+ years experience), AWS and GCP (Transferable)
• Frameworks & Libraries: React, Angular, jQuery, .NET, .NET Core, JSP, Java Servlets, Node.js
• Databases: SQL Server, Oracle, CosmosDB, MySQL, DB2, Big Data Stores
• APIs: RESTful API Design & Implementation, Microservices Architecture
• Tools & Methodologies: Git, Subversion, Apache, IIS, Tomcat, Unit Testing, Dependency Injection, Agile/Scrum, CI/CD Concepts, Technical Documentation
• Operating Systems: Windows, Linux, FreeBSD
• Other: Object-Oriented Design (OOD), System Architecture, Data Modeling, Security Best Practices, Performance Optimization, Scalability, Asynchronous Programming, Event-Driven Systems

• Led and managed multiple cross-functional engineering teams, fostering a culture of high performance and collaboration while working closely with QA and Project Management.
• Mentored and coached junior and mid-level engineers, fostering their professional growth and improving team capabilities and productivity.
• Oversaw code reviews and ensured adherence to coding standards, contributing to a high-quality, maintainable codebase.
• Drove architectural decisions for complex system integrations, ensuring scalability, security, and maintainability across multiple projects.
• Implemented robust CI/CD practices within development workflows, streamlining deployments and improving release reliability for various applications.
• Architected, designed, and developed full-stack web applications, ranging from critical API wrappers to large-scale, cloud-based platforms utilizing client-server communication via APIs and backed by both SQL and NoSQL databases.
• Managed project timelines and resource allocation for multiple concurrent development initiatives, consistently delivering projects on schedule.
• Engineered and implemented a resilient, event-driven transmission system using CosmosDB, ensuring fault tolerance and eventual consistency for critical inter-system communication.
• Pioneered the adoption of new technologies and best practices, continuously evaluating and introducing tools that enhanced development efficiency and product quality.
• Guided technical design and served as team lead for a partially outsourced Android/iOS mobile application project, specifically designing and implementing the robust API server back-end and associated data models.
• Contributed significantly to front-end development using React, Angular, and JavaScript, and back-end development with C# and Azure services.
• Conducted technical interviews and participated in the hiring process, strategically building and expanding the engineering team with top talent.

• Directed the refactoring of a monolithic server codebase to an asynchronous architecture, resulting in significant improvements in application performance and scalability.
• Introduced and implemented dependency injection to enable robust unit testing and improve code maintainability, using mocking for isolated testing.
• Enhanced logging mechanisms across the production environment, dramatically improving the ability of development operations to swiftly identify and resolve critical production issues.

• Developed a dynamic, database-driven web form generation tool that managed both form definitions and data persistence, significantly streamlining content management.
• Engineered a jQuery-based web service system that achieved near-instantaneous page loads by dynamically loading content on demand (scroll/click), drastically improving user experience for large data sets.
• Designed and implemented custom ASP control tags for displaying multi-level, related information with customizable details, enhancing data visualization flexibility.
• Created an automated page data filter system that generated filter queries based on web form fields, supporting multiple, user-specific filter sets stored in XML within the database.
• Designed and implemented a sophisticated time zone handling system, allowing servers to operate in UTC while providing flexible, accurate time displays for global clients, eliminating inter-server clock synchronization issues.
• Optimized numerous database stored procedures and reduced database round trips, leading to notable performance enhancements.

• Executed a comprehensive refactoring of the entire codebase, implementing a robust security model that significantly reduced special value visibility and injection vulnerabilities.
• Developed a powerful Java-based reverse auction platform that substantially improved business profitability and enabled identification of higher-priced vendor services for re-bidding.
• Engineered and deployed a new source control system (CVS on FreeBSD) with scheduled automated backups, replacing an inefficient shared drive approach and improving code management.

• Developed several full-stack, database-driven web applications and essential stand-alone utility applications.
• Created a phone audit system leveraging database replication to reduce load on the phone system and accelerate request processing, identifying phone misuse.
• Implemented a system for tracking file barcode scanner usage, improving asset management and reducing search time for the device.
• Built a comprehensive vacation calendar system for HR, streamlining vacation requests, approvals, and company-wide display with hierarchical viewing permissions.

• Performed full-stack engineering work on large-scale insurance/financial web applications, including the design, creation, and maintenance of several DB2 databases.
• Developed a utility application that automated image creation for rebranding efforts, reducing a multi-week manual task to approximately one minute, saving hundreds of hours of work.
• Collaborated on the creation of an XML-based design document system, enabling business analysts to generate both human-readable documentation and functional new web pages from a single source.
• Conducted rigorous code reviews and refactoring for an off-shore development team, ensuring code quality and adherence to best practices.

• Developed and enhanced Java applications utilizing Oracle databases for genetic analysis and detecting gene-based drug interactions.
• Created a visual tool to link sections of sequenced DNA, facilitating easy identification of gaps and the sorting of relevant segments.

• Developed a client-specific web interface providing secure access to a CVS version control repository, supporting file listing, directory traversal, checkout, and commit functionalities.
• Contributed to the development of shopping cart systems and bulk email platforms with integrated click tracking and comprehensive statistics viewing for corporate clients.
• Developed database-backed software on Sun workstations running Solaris.

• Migrated critical mainframe documentation from GML to HTML for web accessibility, developing a standalone tool to automate the conversion process and generate both frame-based and index-based navigation.
• Developed DB2 database tools.

• Artificial Intelligence (AI)
• Software Development
• Software Engineering
• Web Development
• Architecture
• Architectural Design
• Application Design
• Object-Oriented Programming (OOP)
• Software Development Life Cycle (SDLC)
• Fast Learner
• Programming Languages
• C#
• Java
• C++
• JavaScript
• TypeScript
• jQuery
• JSON
• HTML
• XML
• Cascading Style Sheets (CSS)
• React
• React Native
• Angular
• Cloud
• Cloud Services
• Web Services
• Cloud Services
• Azure
• Big Data
• NoSQL
• CosmosDB
• MongoDB
• Databases
• Data Models
• Schema Design
• Entity Framework
• SQL
• SQL Server
• T-SQL
• MySQL
• PostgreSQL
• Oracle DB
• Web Development
• Web Apps
• Web Services
• Web Applications
• Web Application Development
• PHP
• JSP
• ASP
• ASP.NET
• API Development
• API Design
• REST APIs
• Representational State Transfer (REST)
• Continuous Integration (CI)
• Continuous Delivery (CD)
• Continuous Deployment (CD)
• Dependency Injection
• .NET
• .NET Core
• Web Servers
• Apache
• Internet Information Services (IIS)
• Operating Systems (OS)
• Windows
• Linux
• Free BSD
• Source Control
• Repositories
• Git
• SVN
• Team Management
• Technology Management
• Agile Project Management
• Modern Languages
• Team Building
• Technical Discussions
• Distributed Teams
• Workload Prioritization
• Agile Methodologies
• Scrum
• Waterfall
• Mentoring
• Coaching
• Technical Leadership
• Bachelor of Science
• Bachelor Degree
• Computer Science (CS)
• Creativity
• Adaptability
• Communication
• Oral Communication
• Written Communication
• Documentation
• Writing
• Problem Solving
• Time Management
• Planning
• Delegation
• Problem Solving
• Technical Requirements
• Dependency Injection
• Modular Code Development
• Reverse Engineering
• Attention to Detail
• Emotional Quotient (EQ)
• Work Ethic
• Long-term Vision
• Algorithms
• Data Structures
• Programming
• Debugging
• Reliability
• Project Planning
• Design Review
• User Experience
• Side Projects
• Hobby Development
• PCB Design
• Microsoft Office
• Integrated Development Environments (IDE)
• Microsoft
• Visual Studio
• JetBrains
• Intellij
• CLion
• WebStorm
• Assembly Language
• Printed Circuit Board (PCB)
• Parametric Modeling
• Logic Design
• Software Testing
• Front-End Development
• Back-End Web Development
• Web Services API
• Full-Stack Development
• Skill Development
• Integration Testing
• Unit Testing
• Technical Design
• Software Systems
• Analytical Skills
• Solution Architecture
• Troubleshooting
• Leadership
• Coding Standards
• Best Practices
• Optimization
• Remote Work
• Passionate
• Technical Competence
• Technical Vision
• Cross-functional Team Leadership
• Capacity Planning