Randall Gremillion

About Randall Gremillion

Senior Engineer with expertise in frontend, backend, and UI development, bringing 14+ years of experience building scalable, high-performance web applications using Angular (v14–v16+), React, React Native, and Next.js. Proven success in leading UI architecture, data visualization, and performance optimization for complex, real-time systems in energy, healthcare, and fintech domains. Highly skilled in TypeScript, JavaScript, RxJS, NgRx, and Nx monorepos for modern frontend engineering, combined with strong backend proficiency in.NET (C#) and Java for full-stack application delivery. Experienced in developing interactive dashboards and analytics tools using Highcharts and D3.js, integrating with REST APIs, and ensuring seamless communication between client and server layers. A collaborative and solution-focused professional with deep experience in CI/CD (Git, Jenkins), containerization (Docker, Kubernetes), and cloud deployment (Azure). Dedicated to delivering intuitive UI/UX, maintainable architecture, and high-quality code through Agile practices and cross-functional teamwork.

Experience

1. Senior Engineer

   Halliburton

   Oct 2024 — Present

   Built and evolved a high-performance Angular 16 web application for oil exploration workflows, enhancing UX clarity and enabling drilling and geology teams to visualize complex subsurface data directly in the browser. • Implemented interactive 2D/3D resistivity and well trajectory visualizations using D3.js and Highcharts, empowering engineers to interpret realtime formation behavior with greater accuracy. • Integrated REST APIs with optimized TypeScript data handling and RxJS observables to minimize latency and ensure seamless data streaming during zoom and navigation. • Designed and implemented dynamic single-page applications (SPAs) using Angular and NgRx for state management, improving application performance by 25% and reducing memory overhead. • Led a major frontend migration from Angular to React, optimizing rendering logic and achieving a 50% improvement in page load time and 25% higher user engagement across web and mobile platforms. • Refactored legacy React class components into functional components with hooks, improving maintainability and reducing technical debt by 40%. • Developed dynamic client-side JavaScript functionality for form validation, routing, and UI responsiveness, enhancing user experience and reducing workflow time by 20%. • Integrated.NET (C#) and Java-based RESTful microservices into the front-end architecture to deliver real-time data synchronization and secure transaction workflows. • Participated in backend API enhancements using Spring Boot (Java) and ASP.NET Core, improving system reliability and ensuring seamless communication between frontend and backend services. • Developed and optimized Jenkins CI/CD pipelines to automate builds, testing, and deployments across development, staging, and production environments, reducing release cycles by 30%. • Collaborated with cross-functional teams in Agile/Scrum environments to deliver high-quality features and mentor junior engineers on frontend and full-stack best practices.

Education

• University of Cincinnati

  DMA (Music), Music Performance, General

Skills

• Xml
• Ajax
• Css
• Web Applications
• Json
• Javascript
• Php
• Management
• Advertising
• Team Leadership
• Java
• Information Architecture
• Jsp
• Web Development
• Enterprise Software
• User Experience
• Consulting
• Agile Methodologies
• Oracle
• Flash
• User Interface
• Software Development
• Sdlc
• Html5
• Jquery
• Angularjs
• D3.js