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I'm Randall Gremillion, a senior engineer who specializes in frontend, backend, and UI development with 14+ years of experience. I build scalable, high-performance web applications using Angular (v14–v16+), React, React Native, and Next.js, spanning energy, healthcare, and fintech domains. I value clean architecture, data visualization, and intuitive UX, and I enjoy collaborating with cross-functional teams to deliver solid results. I excel at UI architecture, data visualization, and performance optimization, delivering full-stack solutions with .NET (C#) and Java. I thrive in Agile environments, bring strong CI/CD, Docker/Kubernetes, and Azure experience, and am dedicated to maintainable code and high-quality user experiences through collaborative, solution-focused teamwork.…I'm Randall Gremillion, a senior engineer who specializes in frontend, backend, and UI development with 14+ years of experience. I build scalable, high-performance web applications using Angular (v14–v16+), React, React Native, and Next.js, spanning energy, healthcare, and fintech domains. I value clean architecture, data visualization, and intuitive UX, and I enjoy collaborating with cross-functional teams to deliver solid results. I excel at UI architecture, data visualization, and performance optimization, delivering full-stack solutions with .NET (C#) and Java. I thrive in Agile environments, bring strong CI/CD, Docker/Kubernetes, and Azure experience, and am dedicated to maintainable code and high-quality user experiences through collaborative, solution-focused teamwork.

Randall Gremillion

Full Stack Developer, Front-End Developer, Back-End Developer, +2

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I'm Randall Gremillion, a senior engineer who specializes in frontend, backend, and UI development with 14+ years of experience. I build scalable, high-performance web applications using Angular (v14–v16+), React, React Native, and Next.js, spanning energy, healthcare, and fintech domains. I value clean architecture, data visualization, and intuitive UX, and I enjoy collaborating with cross-functional teams to deliver solid results. I excel at UI architecture, data visualization, and performance optimization, delivering full-stack solutions with .NET (C#) and Java. I thrive in Agile environments, bring strong CI/CD, Docker/Kubernetes, and Azure experience, and am dedicated to maintainable code and high-quality user experiences through collaborative, solution-focused teamwork.…I'm Randall Gremillion, a senior engineer who specializes in frontend, backend, and UI development with 14+ years of experience. I build scalable, high-performance web applications using Angular (v14–v16+), React, React Native, and Next.js, spanning energy, healthcare, and fintech domains. I value clean architecture, data visualization, and intuitive UX, and I enjoy collaborating with cross-functional teams to deliver solid results. I excel at UI architecture, data visualization, and performance optimization, delivering full-stack solutions with .NET (C#) and Java. I thrive in Agile environments, bring strong CI/CD, Docker/Kubernetes, and Azure experience, and am dedicated to maintainable code and high-quality user experiences through collaborative, solution-focused teamwork.

Available to hire

I’m Randall Gremillion, a senior engineer who specializes in frontend, backend, and UI development with 14+ years of experience. I build scalable, high-performance web applications using Angular (v14–v16+), React, React Native, and Next.js, spanning energy, healthcare, and fintech domains. I value clean architecture, data visualization, and intuitive UX, and I enjoy collaborating with cross-functional teams to deliver solid results.
I excel at UI architecture, data visualization, and performance optimization, delivering full-stack solutions with .NET (C#) and Java. I thrive in Agile environments, bring strong CI/CD, Docker/Kubernetes, and Azure experience, and am dedicated to maintainable code and high-quality user experiences through collaborative, solution-focused teamwork.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Senior Engineer at Halliburton

October 1, 2024 - Present

Built and evolved a high-performance Angular 16 web application for oil exploration workflows, enabling drilling and geology teams to visualize complex subsurface data in the browser. Implemented interactive 2D/3D resistivity and well trajectory visualizations using D3.js and Highcharts, empowering engineers to interpret real-time formation behavior. Integrated REST APIs with optimized TypeScript data handling and RxJS observables to minimize latency during zoom and navigation. Led migration from Angular to React, improving rendering and page load performance, and refactored legacy class components to modern functional components. Developed client-side features for validation, routing, and responsive UI, and integrated .NET C# and Java-based microservices for real-time data synchronization and secure transactions. Contributed to backend API enhancements with Spring Boot and ASP.NET Core. Built Jenkins pipelines to automate builds, tests, and deployments, reducing release cycles. Mentor

Senior Engineer at Trility Consulting (Tenaska & Pella Projects)

December 1, 2023 - September 30, 2024

Designed and delivered a robust Angular 14 front-end for an energy-sector sales and finance intelligence platform (Tenaska), enabling non-technical users to analyze pricing and revenue insights through D3.js visualizations. Built reusable Angular components and UI services, consuming REST APIs for real-time data, and delivered cross-platform experiences with React (Next.js) and React Native for Pella Windows. Implemented full Jest testing suites with 100% coverage, improved web performance, and streamlined API communication with ASP.NET Web API. Integrated .NET back-end APIs with Angular/React frontends and enhanced Java Spring Boot REST services for scalable microservices. Led stakeholder demos and product alignment, and pursued frontend performance tuning using RxJS, NgRx, and code-splitting to reduce load times by 35%. Mentored junior developers and automated CI/CD with Jenkins and Git.

Senior Engineer at AbbVie

November 1, 2022 - December 31, 2023

Developed interactive data visualization tools on Palantir Foundry (Quiver/Slate), leveraging Highcharts and D3.js to deliver pharma-grade analytics dashboards. Led full-cycle UI development with Angular 15 and React, enabling internal users to explore complex datasets securely. Designed reusable components for real-time analytics and optimized data pipelines with TypeScript/Node.js and PostgreSQL. Collaborated with backend teams on Java Spring Boot and .NET Core API enhancements to ensure secure authentication and efficient data transfer. Implemented healthcare-compliant visualization modules, improved UI performance with RxJS, and built automated CI/CD pipelines with Jenkins. Partnered with data scientists to translate raw research data into actionable insights.

Senior Engineer at Mello (loanDepot)

May 1, 2019 - November 30, 2022

Led frontend development using Angular (v12–v14) on a .NET C# service layer for a high-volume mortgage lending platform. Implemented RxJS and NgRx to maintain predictable data flow, improved performance by ~30%. Built modular Angular apps using Nx monorepos, enabling shared components and faster feature delivery. Created Cypress end-to-end and integration tests, increasing regression coverage and reducing post-release issues by ~40%. Supported migration to microservices (NET Core, Java Spring Boot) and collaborated with backend teams to design RESTful APIs. Optimized frontend performance with lazy loading and route optimization, and partnered with product owners to translate financial workflows into intuitive UI. Implemented CI/CD automation with Jenkins and Git; mentored juniors and contributed to Agile ceremonies.

Senior UI Engineer at ThinkIQ

October 1, 2018 - May 31, 2019

Built advanced D3.js data visualizations for manufacturing analytics, transforming sensor data into real-time dashboards and facilitating data-driven decisions. Delivered live monitoring tools and performance dashboards for executives, improving operational ROI. Designed intuitive UI layouts focused on usability and accessibility, and collaborated with designers to translate manufacturing data into user-friendly visual components. Created reusable UI libraries using AngularJS and React prototypes, integrating with Drupal/PHP backend REST endpoints. Worked with cross-functional teams to optimize UI performance and ensure seamless real-time data interactions.

Senior Java Engineer at Security First Corporation

August 1, 2015 - October 31, 2018

Designed and developed RESTful backend services using Java, Spring Boot, and Hibernate; implemented microservice architectures for scalability and modular deployment. Optimized data access with JPA/SQL and implemented OAuth2, JWT, and Active Directory authentication for enterprise security. Engineered asynchronous processing with Spring JMS and Kafka for high-throughput real-time event handling. Defined policy management workflows and APIs for sensitive data protection rules; integrated backend with AngularJS front-end and Drupal/PHP backend. Implemented unit/integration testing with JUnit/Mockito and contributed to CI/CD pipelines with Jenkins.

VP, User Experience at Orangepeople LLC

March 1, 2011 - May 31, 2015

Founded and led the User Experience division, mentoring cross-functional front-end teams delivering high-performance, enterprise-grade applications for Fortune 500 clients. Architected and delivered real-time analytics dashboards for Toyota Motor Sales, integrating data streams from Scala, Solr, and Apache Spark to provide leadership with instant visibility into key operational and financial metrics. Directed UI strategy and design system development, ensuring scalability, accessibility, and consistency across large enterprise web ecosystems. Established UI/UX standards and component libraries, reducing development time and improving collaboration; partnered with backend teams to define REST API contracts and data visualization models.