Esy Crux

Rising Codementor

US$15.00

For every 15 mins

First 15 mins free for your first session

ABOUT ME

Technical Leader | 20 Years in Software Development | Mentor | Founder | Bridging Technology & Business

Hi, I’m Esy. I help developers solve problems in C# and .NET—from debugging stubborn issues to designing APIs, refactoring existing code, and making architecture decisions. I bring 20 years of software development experience, working with startups, small businesses, and larger organizations.

As a Lead Mentor at Green Fox Academy, I helped complete beginners become professional developers through intensive full-stack courses, individual guidance, and practical projects. I’ve also built products as a founder, including GitGut, an AI voice companion for League of Legends players.

In a session with me, we’ll work through your problem together, understand why it happens, and find a practical way forward. My approach is calm, patient, and hands-on. I explain the reasoning behind a solution so you can apply what you learn to your next challenge. Whether you’re learning the fundamentals, stuck on a bug, or looking for a second opinion on your code or system design, I’m happy to help.

Outside software, I enjoy photography, video editing, 3D printing, music, and working on my project car.

Czech, English

Prague (+01:00)

Joined January 2021

EXPERTISE

17 years experience

It feels like ages on my first projects in .Net 2.0 When I was trying to utilize my previous experience with visual basic 6. I stick to t...

It feels like ages on my first projects in .Net 2.0 When I was trying to utilize my previous experience with visual basic 6. I stick to the .Net ecosystem form almost the whole time of my development up today. I develop for different platforms started with Win Forms, WPF, Silverlight, Windows Phone, ASP and end up with MVC with .Net Core.

Teaching

2 years experience

Teaching cannot be just a job, It should be your mission. I was always ready to help with anything for motivated individuals.

Consulting

7 years experience

I was always opened to provide consultations in the IT field related to development, implementations, and other topics.

Java

2 years experience

Mentoring

5 years experience

I spend 2 years in a Bootcamp with intensive courses for developers. During my developer career, I mentored a variety of people from diff...

I spend 2 years in a Bootcamp with intensive courses for developers. During my developer career, I mentored a variety of people from different backgrounds with unique skill sets.

Video Editing

4 years experience

UX/UI Design

3 years experience

REVIEWS FROM CLIENTS

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EMPLOYMENTS

Freelance

Esy

2006-01-01-Present

Over the last 20 years in software development I have worked across most parts of the stack. I’ve built systems, worked with startups and...

Over the last 20 years in software development I have worked across most parts of the stack. I’ve built systems, worked with startups and small companies, mentored developers, and helped turn ideas into real products. My work usually involved backend development, system design, API development, and sometimes UI/UX, product decisions, or mentoring developers. In recent years I have also been focusing more on mentoring people in soft skills, communication, and social dynamics. I enjoy helping people grow not only technically but also in how they communicate, collaborate, and build confidence.

Developer

Appio Digital

2023-03-01-2025-12-01

Backend development, API development, and refactoring in .NET.

API

.NET

Backend Engineer

API

.NET

Backend Engineer

Co-founder

GitGut.ai

2021-03-01-2023-02-01

Co-founded a startup building an AI voice companion for League of Legends players. The idea was to give players real-time insights and gu...

Co-founded a startup building an AI voice companion for League of Legends players. The idea was to give players real-time insights and guidance during gameplay. I worked mainly on the technical side of the product. This included designing the backend, connecting game data with the AI features, and building the systems that powered the platform. Like in most startups, the role was not limited to just development. I was also involved in product decisions, experimentation, and shaping the direction of the project as we built and tested the idea. Stack: C#, AspNet, Unity, Vue.js, MySql, Redis, Mongo, Digital Ocean, Grafana, Prometheus, Sentry, Docker

PROJECTS

GitGut — AI Voice Companion for League of Legends

2023

Co-founded and helped build an AI voice companion that gave League of Legends players real-time insights and guidance during gameplay. I...

Co-founded and helped build an AI voice companion that gave League of Legends players real-time insights and guidance during gameplay. I designed the backend, connected game data with AI features, and built the systems powering the platform. Alongside development, I contributed to product decisions, experimentation, and shaping the project as we built and tested the idea. Technologies: C#, ASP.NET, Unity, Vue.js, MySQL, Redis, MongoDB, DigitalOcean, Grafana, Prometheus, Sentry, Docker.

Topdeck — Hearthstone Tournament Platform

2015

Founded and built an online platform for weekly Hearthstone tournaments in Europe and the US, combining tournament management with a hub ...

Founded and built an online platform for weekly Hearthstone tournaments in Europe and the US, combining tournament management with a hub for the competitive community. I designed and developed the system from scratch, including player registration, automated bracket generation, match pairing, results tracking, and tournament progression. I built the backend and frontend using C#, .NET, and MVC. I also organized tournaments, built and supported the community, created content, and improved the product and user experience based on player feedback.