portfolio-frontend
This app. The Next.js 15 App Router UI in front of every service.
TypeScriptNext.jsReact QueryTailwind
Hank Karpinen
// full-stack-engineer · pullman-wa
I started in QA — learning how software breaks — then moved into building it. Today I modernize legacy systems into scalable .NET and cloud architectures, increasingly with AI-assisted tooling I build myself, and ship full-stack across TypeScript/React and Python. AWS Certified Solutions Architect & ScrumMaster. Open to senior & staff roles.
4+ yrs
experience
7
services
AWS
certified
OPEN
to roles
// CERTIFICATIONS
AWS Certified Solutions Architect — AssociateAWS Certified Cloud PractitionerCertified ScrumMaster
// EXPERIENCE
Jun 2025 — Present
Enterprise Developer II · University of Idaho
Moscow, ID
Modernizing legacy .NET WebForms apps into .NET 10 Razor Pages + API architectures. Built a custom AI-driven tooling workflow that pulls domain-driven components out of existing codebases and generates modern patterns for redevelopment. Sprint steward; engineering point of contact for a Databricks Lakehouse data modernization.
Feb 2024 — Jun 2025
Software Engineer · The College of Idaho
Caldwell, ID
Consolidated 10+ disconnected legacy systems into a single containerized full-stack app with role-based access. Built a Drupal 11 platform end-to-end and stood up CI/CD pipelines across multiple environments.
Dec 2022 — Feb 2024
Software Engineer in Test (SDET) · Scentsy
Meridian, ID
Automated and manual test suites for front-end and API features, plus complex SQL test-data generation for edge cases. Supported the migration from a monolith to a distributed microservices architecture.
Aug 2020 — Sep 2021
Software Tester · QualityLogic
Boise, ID
Scenario-based manual and automated testing with TestRail and Selenium; detailed defect reports and repro steps, working inside agile sprint teams.
// PROJECTS
portfolio-identity
Auth & identity: registration, JWT login, TOTP 2FA, email confirmation, profiles, admin.
C#.NET 8JWTTOTP 2FA
portfolio-household
Households coordinate shared life: chore rotations, a shared calendar, and member roles.
C#EF CorePostgresRabbitMQ
portfolio-finance
Household expense splitting — bills split by membership, plus income tracking for coverage.
C#EF CorePostgres
portfolio-forum
Reddit-style communities: threads, comments, votes, and moderator membership & bans.
C#RabbitMQSSE
portfolio-notifications
Consumes domain events over RabbitMQ, persists them, and fans out to clients over SSE.
C#RabbitMQSSE
portfolio-geography
Stateless geography service — current weather today, room for geocoding & timezones.
C#.NET 8OpenWeather
portfolio-math
Stateless math service — unit conversion today, built to grow into more pure-math tools.
C#.NET 8DDD
portfolio-infra
Docker Compose stack — pulls prebuilt ghcr.io images and wires up every service.
DockerComposeNginx
// SKILLS
Languages & Frameworks
C#.NETASP.NETTypeScriptJavaScriptReactNext.jsNode.jsPythonGroovy
Architecture
MicroservicesDomain-Driven DesignRESTful APIsEvent-Driven (RabbitMQ)Legacy ModernizationSystem Design
Cloud & DevOps
AWSAzureDockerCI/CDGitContainerization
Data
OraclePL/SQLSQLMongoDBDynamoDBMariaDBData Pipelines
Testing & QA
Automated TestingSeleniumAPI TestingTestRailTest Design
Leadership & Agile
Certified ScrumMasterSprint PlanningRetrospectivesStakeholder Collaboration