Terina Seltzer
Software Engineer, Full-Stack Developer, Java and Android Developer
Software Engineer • Full-Stack, Java, and Android Development
U.S. Air Force veteran combining more than 10 years of systems administration experience with hands-on development of secure full-stack, mobile, database, and distributed applications.
About Me
I am a software engineer and U.S. Air Force veteran with more than a decade of experience supporting enterprise systems, networks, servers, and end users. My infrastructure background shapes how I build software: with an emphasis on reliability, security, maintainability, clear documentation, and root-cause problem-solving.
After returning to technology, I earned a Bachelor of Science in Software Engineering from Western Governors University and built full-stack, Android, database, and blockchain applications using Java, Kotlin, Python, TypeScript, Spring Boot, React, Django, SQL, Docker, and Hyperledger Fabric. I am seeking an opportunity to apply that combination of software development and infrastructure experience on a collaborative engineering team.
10+
Years in Systems & IT
B.S.
Software Engineering
CompTIA
Project+ Certified
AWS
Cloud Practitioner
Featured Projects
Selected software engineering projects.
Full-stack, mobile, backend, database, distributed systems, API integration, accessibility, and maintainable implementation for practical problems.
Blockchain Veterinary Records Management
Engineered a multi-organization veterinary-records platform on Hyperledger Fabric that enables clinics and verified pet owners to exchange medical records and authorize ownership transfers without relying on a single central database.
Technologies: Java, Spring Boot, Hyperledger Fabric, H2, Prometheus, Grafana, Docker, JavaScript
Highlights:
- Deployed a three-node Raft cluster to eliminate a single ordering-service failure point.
- Implemented Java chaincode to manage animal registration, medical records, and owner-authorized transfers.
- Exposed blockchain workflows through a Spring Boot REST API and browser-based interface.
Task Manager
Built a full-stack productivity platform that organizes tasks through a six-quadrant prioritization system with scheduling, recurring workflows, progress tracking, and drag-and-drop movement.
Technologies: React, TypeScript, Vite, Express, MySQL
Highlights:
- Built a REST API for task creation, updates, scheduling, recurring workflows, and progress tracking.
- Implemented drag-and-drop task prioritization across six workflow quadrants.
- Added recurring tasks, rewards, and a task mascot to support engagement.
Shepherd Pet Adoption
Developed an Android application that helps animal rescues centralize adoptable-pet records, volunteer workflows, and role-based access in one mobile platform.
Technologies: Java, Kotlin, Android, Firebase Firestore, Gradle
Highlights:
- Created category-based browsing for dogs, cats, birds, reptiles, and other animals.
- Implemented pet records, volunteer workflows, validation, and role-based access.
- Designed a mobile-first interface focused on clear navigation and usability.
Seltzer's Rocking Horses Inventory System
Built a Java and Spring Boot inventory-management application for tracking products, in-house parts, outsourced parts, and purchasing workflows.
Technologies: Java 21, Spring Boot, Thymeleaf, Spring Data JPA, Maven, H2
Highlights:
- Developed create, search, update, purchase, and delete workflows.
- Modeled relationships between products and component parts.
- Applied validation rules to protect inventory integrity.
Coding Creations
Developed a Django educational website that organizes and presents screen-free coding activities and printable logic worksheets for children.
Technologies: Python, Django, HTML, CSS, JavaScript
Highlights:
- Structured educational products through curriculum-based categories and clear navigation.
- Created responsive product pages and calls to action.
- Combined coding education with child-friendly visual design.
World Map and Statistics
Built an interactive data application that retrieves World Bank country statistics and presents them through a searchable, theme-aware world map.
Technologies: JavaScript, API integration, HTML, CSS
Highlights:
- Integrated World Bank API data for population, income, and GDP information.
- Added interactive country selection, search, and map controls.
- Presented external data through responsive, theme-aware information panels.
Skills
Software engineering and infrastructure capabilities.
Technologies applied across full-stack, mobile, backend, database, distributed systems, cloud, and enterprise support work.
Languages & Core Web
Programming languages used across web, mobile, backend, scripting, and database projects.
Frontend
Responsive, accessible interfaces built with modern JavaScript frameworks and REST API integration.
Backend
Server-side applications, REST APIs, validation, and database-backed business logic.
Mobile
Native Android applications with database integration, validation, role-based access, and mobile-first interfaces.
Databases
H2, Firestore, relational modeling, queries, stored procedures, and triggers.
Blockchain & Observability
Permissioned blockchain development, distributed consensus, monitoring, metrics, and containerized environments.
Tools & Cloud
Development tools, version control, build automation, containers, virtualization, and AWS cloud fundamentals.
Systems & Infrastructure
Windows and Linux administration, networking, account and permission management, patching, security, and root-cause troubleshooting.
Experience & Career Development
Software development backed by military, enterprise systems, and volunteer experience.
Professional Experience
Independent Software Developer — Portfolio Projects
– Present
Building production-style full-stack, mobile, database, and distributed applications that address practical needs in productivity, education, animal rescue, and inventory management.
Highlights
- Built a full-stack task-management platform using React, TypeScript, Express, and MySQL, including drag-and-drop prioritization and recurring task workflows.
- Developed an Android pet-adoption and volunteer-management application using Java, Kotlin, and Firebase Firestore.
- Created a Django website for coding-education products and printable learning activities.
- Built Java and Spring Boot applications using object-oriented design, data validation, and relational persistence.
System Administrator & PC Support
–
Virginia Tech Library Systems
Highlights
- Administered Windows and Linux servers, user accounts, permissions, system updates, network services, and performance monitoring.
- Maintained network and computing infrastructure supporting reliable access to organizational systems and resources.
- Diagnosed hardware, software, operating-system, and network-connectivity issues through root-cause analysis.
- Configured devices, documented solutions, supported end users, and escalated complex incidents when necessary.
Network & System Administrator
–
U.S. Air Force
Highlights
- Administered secure network infrastructure, servers, routers, switches, firewalls, and user systems in operational environments.
- Diagnosed and resolved network and system failures to restore mission-critical services.
- Performed system maintenance, patching, account administration, security monitoring, and technical documentation.
- Trained up to eight personnel in server administration, troubleshooting, and regional systems support.
- Supported base-level web applications using HTML, CSS, and ColdFusion.
- Held an active TS/SCI security clearance during military service.
Volunteer Experience
Crisis Counselor
– Present
Crisis Text Line
Highlights
- Provide real-time written support using active listening, empathetic communication, collaborative problem-solving, crisis de-escalation, and safety-focused resource referrals.
Education & Technical Development
Software Engineering Education & Projects
–
Highlights
- Earned a Bachelor of Science in Software Engineering with coursework in full-stack development, software architecture, databases, testing, and secure application design.
- Built applications using Java, Python, JavaScript, TypeScript, SQL, Android, Spring Boot, Angular, and React.
- Designed relational databases with normalized schemas, queries, stored procedures, triggers, and reporting workflows.
- Applied object-oriented programming, version control, validation, debugging, and software testing throughout project development.
Career Break
Family Caregiving & Homeschooling
–
- Provided full-time family caregiving while coordinating medical, therapy, educational, and household schedules with healthcare providers, educators, and support professionals.
- Led eight years of homeschooling through individualized lesson planning, curriculum selection, instruction, scheduling, and progress tracking.
Education
Software engineering education.
Formal education in software engineering and information technology, supported by extensive systems, networking, and security experience.
Western Governors University
–
Bachelor of Science in Software Engineering
Community College of the Air Force
Associate Degree in Information Technology
Certifications
Professional certifications and continuing education.
Credentials and coursework in AWS cloud computing, project management, frontend and backend development, programming, databases, and applied artificial intelligence.
Online Learning
Contact
Let’s Connect
I am interested in software engineering, full-stack development, Android development, and application support opportunities where I can contribute software development expertise, infrastructure knowledge, and disciplined technical troubleshooting.
Use the contact form, connect with me on LinkedIn, or review my work on GitHub.