Projects and real cases | Hector Antruejo

HectorCloud

2026 - Presente

Fullstack

Live professional portfolio built to showcase technical expertise, value storytelling, and execution capability.

Challenge

Bring experience, skills, and technical evidence together in one clear interview-ready experience.

Solution

Blazor Server architecture with JSON catalogs, ES/EN localization, SCSS styling, and Playwright tests, supported by AI agents to plan stories, review SEO/accessibility, generate tests, and document decisions without losing technical validation.

Impact

Scalable foundation for portfolio growth and stronger communication of technical profile.

Blazor Server.NETSCSSPlaywrightLocalization

JavaScript .NET / ASP.NET Core AI-assisted development C#

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Personal Aquarium

2026 - Presente

Fullstack

Responsive web application to manage aquariums, species, symptoms, treatments, water measurements, and compatibility between aquarium animals.

Challenge

Centralize practical aquarium knowledge and turn it into a useful tool for real aquarium tracking, from initial setup to ongoing maintenance.

Solution

Built a .NET Core and Blazor platform to catalog fish families, invertebrates, and other animals, register aquariums, track stages, plants, animals, measurements, and review symptoms with possible causes and remedies.

Impact

Personal product for aquarium keepers that combines management, technical reference, and prevention of issues such as algae, incompatibilities, or water imbalance.

C#.NET CoreBlazorResponsive UIImage optimizationAI-assisted development

JavaScript .NET / ASP.NET Core AI-assisted development C#

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Enterprise application modernization

2025 - Presente

Backend

Legacy system evolution into modern .NET and Blazor services while preserving operational continuity.

Private or confidential project; anonymized technical description is shown.

Challenge

Reduce technical debt without disrupting business processes or data quality.

Solution

Incremental refactoring with ASP.NET Core APIs, Entity Framework, and Oracle/PostgreSQL integration strategy, using AI agents to analyze impact, propose refactors, generate regression tests, and review alternatives before changing critical services.

Impact

Improved maintainability, more predictable deployments, and lower friction for future changes.

C#ASP.NET CoreEntity FrameworkOraclePostgreSQL

JavaScript Scrum .NET / ASP.NET Core AI-assisted development

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Node.js modernization and Ionic mobile app

2021 - 2025

Fullstack

Recovery and evolution of a Node.js application unused for more than 4 years, strengthened with TypeScript, testing, and a scalable cloud-oriented approach.

Private or confidential project; anonymized technical description is shown.

Challenge

Bring an abandoned system back to life, reduce technical risk, and prepare its AWS infrastructure to scale with the lowest viable cost.

Solution

Project upgrade, strong typing with TypeScript, optimization for scalable deployment, unit tests, load tests, and AWS cost-saving analysis.

Impact

More maintainable technical base, validated by tests and aligned with cost-efficient infrastructure; supervision of an Ionic Angular app deployed to Android and iOS.

Node.jsTypeScriptAWSIonic FrameworkAngularAndroidiOSUnit TestingLoad Testing

Scrum AI-assisted development AWS Solutions Architecture TypeScript

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Cloud automation platform

2021 - 2025

DevOps

Infrastructure and automation solutions, including a self-built cost analysis tool that achieved 20-30% savings for a client.

Private or confidential project; anonymized technical description is shown.

Challenge

Scale client infrastructure with traceability, less manual operational work, and costs under control.

Solution

Provisioning with AWS CDK, automation scripts, and a self-initiated Blazor web tool to inventory volumes, snapshots, and orphaned or unused resources.

Impact

20-30% savings on a client's infrastructure costs, plus faster delivery cycles and standardized deployments.

AWSAWS CDKTypeScriptPythonPower Automate

Scrum AI-assisted development Git AWS CDK

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Real-time video game platform foundation

2017 - 2021

Backend

Technical foundation for several Android games connected to .NET servers, with shared users, shared data and currencies, real-time communication, and operational dashboards.

Private or confidential project; anonymized technical description is shown.

Challenge

Prevent each game from becoming an isolated technical island and create a common platform able to scale, share state across products, and keep live matches observable.

Solution

Designed .NET Core/.NET Framework servers and APIs, real-time communication, coordinated caches, cascade notifications to propagate changes, and dashboards for live match supervision.

Impact

Reusable base to launch and operate several games with less technical duplication, shared economy support, stronger server control, and better reaction capacity during live matches.

.NET Core.NET FrameworkC#REST APIsWebSocketsUnity3DAndroidCachingStripe

Scrum .NET / ASP.NET Core C#Entity Framework

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