// Hello, World

Fendy
Yulianto

C# / ASP.NET Developer|

Transforming complex challenges into elegant, scalable solutions. 7+ years engineering enterprise-grade web applications with C#, ASP.NET, and modern web technologies.

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7+
Years Exp.
40%
DB Perf. Boost
∞
Lines of Code
FY
7+
Years of
Experience

About Me

Launching Ideas Into the
Digital Universe

I'm Fendy Yulianto, a passionate C#/ASP.NET developer based in Malang, East Java, Indonesia. With over 7 years of hands-on experience, I specialize in building enterprise-grade web applications that are fast, maintainable, and scalable.

I thrive at the intersection of robust backend architecture and clean, responsive UI. Whether it's designing a performant SQL Server schema, integrating complex REST APIs, or streamlining CI/CD pipelines, I bring end-to-end ownership to every project I touch.

Beyond the keyboard, I'm driven by a continuous hunger to learn, adapt and innovate always asking "how can we do this better?"

Passionate Developer
Team Collaboration
Continuous Learning
Innovation Focus
Adaptability
Attention to Detail
Say Hello

Technical Expertise

Skills & Technologies

A focused stack built for enterprise .NET development — from database to deployment.

⚙️
C#
Expert • 7+ yrs
🌐
ASP.NET MVC / Core
Expert • 7+ yrs
🔷
.NET Framework / Core
Expert • 7+ yrs
🗄️
SQL Server
Advanced • 6+ yrs
🟨
JavaScript / HTML / CSS
Advanced • 6+ yrs
🔗
REST API Design
Advanced • 5+ yrs
🌿
Git / GitHub
Advanced • 6+ yrs
🚀
IIS / Cloud Deployment
Proficient • 5+ yrs

Career Journey

Professional Experience

Seven years of end-to-end ownership across full-stack .NET projects.

Enterprise Web Development @ PlanetSharp

 2017 – Present · 7+ years

  • Designed and delivered full-cycle enterprise web applications using C# and ASP.NET MVC/Core.
  • Architected multi-tier solutions following SOLID principles, ensuring maintainability at scale.
  • Led requirement gathering, system design, and technical documentation for complex projects.
  • Mentored junior developers and performed code reviews to uphold quality standards.
  • Collaborated with cross-functional teams to deliver projects on schedule and within scope.

UI / UX Development @ PlanetSharp

 2017 – Present · 7+ years

  • Built responsive, accessible interfaces using HTML5, CSS3, and modern JavaScript.
  • Integrated front-end with Razor views and ASP.NET data-binding patterns.
  • Applied UX best practices to improve user flows and reduce page abandonment.
  • Optimized front-end performance via asset minification, lazy loading, and CDN delivery.

Database Optimization @ PlanetSharp

 2017 – Present · 7+ years

  • Achieved 40% query performance improvement through strategic indexing and query refactoring.
  • Designed normalized schemas and wrote optimized stored procedures and views in SQL Server.
  • Implemented database migration strategies with zero downtime for production deployments.
  • Monitored execution plans and resolved N+1 query issues across large datasets.

API Integration @ PlanetSharp

 2017 – Present · 7+ years

  • Designed and consumed RESTful APIs following OpenAPI/Swagger specifications.
  • Built secure authentication flows using JWT and OAuth 2.0.
  • Integrated payment gateways, third-party services, and government data platforms.
  • Implemented API versioning, rate limiting, and error-handling middleware.

Version Control & CI/CD @ PlanetSharp

 2017 – Present · 7+ years

  • Managed Git workflows (Gitflow, feature branching) for teams of 5+ developers.
  • Configured CI/CD pipelines to automate build, test, and deployment stages.
  • Reduced integration conflicts and release cycle time through structured branching strategies.
  • Wrote automated unit and integration tests to maintain >85% code coverage.

Deployment & Infrastructure @ PlanetSharp

 2017 – Present · 7+ years

  • Deployed and maintained ASP.NET applications on IIS with custom SSL and load configurations.
  • Migrated on-premise workloads to cloud environments (Azure App Service).
  • Configured environment-specific appsettings and secrets management.
  • Established rollback procedures and monitoring alerts for production reliability.

Featured Work

Selected Projects

A selection of enterprise applications, APIs, and tools built throughout my career.

Enterprise ERP Portal

Full-cycle ASP.NET MVC enterprise resource planning portal with multi-tenant architecture, role-based access control, and a real-time dashboard for business analytics.

C# ASP.NET MVC SQL Server SignalR

RESTful API Gateway

Scalable Web API gateway serving 10+ internal microservices, featuring JWT authentication, Swagger documentation, request throttling, and centralized error handling.

.NET Core REST API JWT Swagger
️

SQL Performance Toolkit

In-house diagnostic toolkit for SQL Server query analysis, index advisor, and execution plan visualizer — yielding 40%+ query time reductions across production databases.

SQL Server T-SQL C# Reporting

Responsive Admin Dashboard

Feature-rich, mobile-first admin panel built with Razor Pages, Bootstrap, and custom JavaScript — featuring interactive charts, lazy-loaded data tables, and dark/light mode.

Razor Pages JavaScript CSS3 Chart.js

CI/CD Deployment Pipeline

Automated build-test-deploy pipeline for ASP.NET Core applications integrating GitHub Actions, IIS Web Deploy, and Slack notifications for continuous delivery.

GitHub Actions IIS PowerShell Azure

Payment Gateway Integration

Secure third-party payment integration layer for e-commerce platforms, supporting multiple providers, webhook event handling, and automatic reconciliation.

C# OAuth 2.0 Webhooks REST API

Contact

Let's Build Something Together

Have a project in mind or just want to say hi? I'd love to hear from you.

Ready to connect?

I'm currently open to new opportunities and interesting projects. Whether you need a seasoned .NET engineer, a code review, or just want to talk tech — drop me a message.

[email protected]
Malang, East Java, Indonesia
linkedin.com/in/fendyyulianto
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