David Sahagun
David Sahagun
Professional Summary
Versatile software engineer with 15+ years of experience in the software industry, having collaborated with industry-leading companies. Proven track record of negotiating, organizing, and executing projects with precision. A highly enthusiastic individual committed to continuous learning, adept at handling challenging situations, demonstrating leadership skills, and possessing comprehensive expertise in various programming languages.
Areas of Expertise
Professional Skills
- Managing Teams
- SDLC
- MVP
- Software Development
- Agile Methodologies
- ScrumMaster
- System Design
Technical Skills
- C# .NET
- Java
- Python
- Kotlin
- Swift
- JS & TS
- Cloud Computing (Azure / AWS / GCP / OCI)
- Git
Professional Experience
Sr. Web Developer — Unite Here Health | Culinary Health Fund
Las Vegas, NV | May 2024 – present- Modernized legacy applications by migrating from VB.NET to contemporary web technologies.
- Designed and developed RESTful APIs using .NET (versions 6–10).
- Built and maintained Azure CI/CD pipelines to automate application deployments.
- Utilized Entity Framework (EF) for efficient database access and ORM operations.
- Developed scalable, reusable frontend components using React.
- Created and optimized SQL stored procedures using SQL Server Management Studio (SSMS).
- Configured and maintained Windows Server environments for .NET application hosting.
Co-Founder & Fullstack Developer — Lupa Recruiter
Las Vegas, NV | June 2022 – May 2024- Initiated development of all systems and implemented an Applicant Tracking System (ATS) from the ground up.
- Built ATS backend and API services from inception to MVP after company previously relied on Google Spreadsheets.
- Selected AWS infrastructure; used Python & Django to complete 80% of backend within 2 months.
- Developed a C# .NET microservice enabling recruiters to import public LinkedIn data for processing.
- Built frontend using React with reusable scalable components.
- Designed ETL processes and algorithms to populate PostgreSQL database with 80,000 candidate profiles.
- Used Docker containers for WordPress hosting and Metabase BI environment.
Developer — Oracle
Redwood City, CA | June 2018 – June 2022- Specialized in cloud infrastructure, integrations, and enterprise tooling.
- Designed Terraform recipes for Oracle Cloud Infrastructure (OCI) with region-specific alarms.
- Built Python automations integrating Jira for ticket creation based on alarms.
- Containerized applications using Docker and Docker Compose; orchestrated using Kubernetes.
- Developed PHP Slack integrations and ETL pipelines transferring OSvC data to Data Warehouse.
- Built Java ETL cron jobs for database extraction and warehouse loading.
- Developed C# .NET add-ins for OSvC console (backend & frontend).
- Used Oracle VBCS (Visual Builder Cloud Service) to build NGCC routing algorithms.
- Connected C# and Java microservices for intelligent call routing systems.
Developer — Global Hitss
Zapopan, Mexico | July 2016 – June 2018- Developed ASP.NET applications for Esurance quote flows.
- Built C# backend services for mobile quote retrieval.
- Led iOS and Android development for Esurance mobile app.
- Migrated iOS from Objective-C to Swift 3.1.
- Migrated Android from Java to Kotlin.
- Built iOS beacon & augmented-reality office navigation app.
- Designed MVP indoor retail navigation system using AR.
Developer — HP / HPE
Zapopan, Mexico | May 2014 – July 2016- Built ASP.NET web applications, C# backend services, Java microservices, and iOS apps.
- Developed internal cloud marketplace for employee cloud service requests.
- Built cubicle reservation system for flexible seating operations.
- Developed ~90% of OO Flows (Operations Orchestration) backend tools.
- Implemented JS & JSON payload systems for cloud service orchestration.