Ergun Batuhan Öktem

Ergun Batuhan Öktem

Mentor
Rising Codementor
US$15.00
For every 15 mins
ABOUT ME
Experienced full-stack developer with 10+ years of experience
Experienced full-stack developer with 10+ years of experience

Senior Full Stack Engineer with 10+ years of experience building web, mobile, desktop, cloud, and XR applications across startups, product teams, and consultancy environments.

My core focus is modern full stack engineering: designing and shipping scalable applications, APIs, and cross-platform products using C#, .NET, ASP.NET Core, Blazor, MAUI, Go, JavaScript/TypeScript, React, Angular, SQL, microservices, and cloud platforms. I’ve worked across frontend, backend, mobile, architecture, modernization, and delivery, and I’m comfortable moving from product discovery to production deployment.

Alongside my full stack background, I also bring hands-on experience in XR, AR/VR/MR, Unity, and real-time application development. That wider technical range helps me adapt quickly, solve problems across platforms, and contribute wherever a product needs depth.

I also use AI-augmented engineering workflows to improve delivery speed, prototyping, debugging, documentation, and developer productivity. This includes modern AI coding and model ecosystems such as Claude Code, Cursor, OpenAI Codex, Google Antigravity, GPT, Gemini, and Claude Opus, applied pragmatically alongside strong software engineering fundamentals.

Key areas of experience include:

• Full stack development with .NET, ASP.NET Core, Blazor, React, Angular, Node.js, and REST APIs

• Cross-platform and mobile development with MAUI, Xamarin, Flutter, React Native, Kotlin, Swift, and Objective-C

• Backend and systems work with C#, C++, Rust, Go, microservices, gRPC, and distributed application design

• Databases including SQL Server, PostgreSQL, MySQL, Oracle, SQLite, MongoDB, Cassandra, and Redis

• Cloud, DevOps, and delivery using Azure, AWS, Docker, Git, CI/CD, and Agile delivery practices

• XR and interactive development with Unity, Unreal Engine, AR Foundation, ARKit, ARCore, and Apple Vision Pro-related work

I’m especially interested in senior full stack, platform, product engineering, and AI-augmented software roles where I can help teams modernize systems, ship high-quality products, and move quickly without compromising engineering standards.

Feel free to connect if you’re hiring for senior full stack, software engineering, platform, or AI-augmented product development work.

London (+01:00)
Joined December 2020
EXPERTISE
10 years experience
10 years experience
6 years experience
3 years experience
2 years experience
10 years experience
10 years experience

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SOCIAL PRESENCE
GitHub
Algorithm
C#
2
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20 Questions Game
JavaScript
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Stack Overflow
1 Reputation
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EMPLOYMENTS
Full-stack Engineer
STEMXR
2021-07-01-Present
  • XR (AR, VR, MR) development by using Unity, C#
  • Website development by using HTML, CSS, WordPress
  • XR (AR, VR, MR) development by using Unity, C#
  • Website development by using HTML, CSS, WordPress
HTML/CSS
WordPress
VR
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HTML/CSS
WordPress
VR
.NET Core
XR
Unity
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Founder
Flame Lion Ltd
2019-12-01-Present

Founded a software company in the UK, specializing in web, mobile, desktop, AR/VR/MR, and game development. Built solutions using tech...

Founded a software company in the UK, specializing in web, mobile, desktop, AR/VR/MR, and game development. Built solutions using technologies like C#, Rust, C++, Unity, Unreal Engine, Node.js, Xamarin, Flutter, MAUI, Blazor, React, Ruby on Rails and various databases.

HTML/CSS
Android
C#
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HTML/CSS
Android
C#
SQL
Node.js
Xamarin
Cocos2d-x
React
Rust
React Native
VR
.NET Core
iOS
ASP.NET Core
Golang
RESTful API
Blazor
XR
Blazor WebAssembly
Unity
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SWE, Data Scientist, and System Design Expert P1 - Writer, Generalist
Mercor
2026-04-01-2026-07-01

Provided expertise to improve models for a top AI lab

Provided expertise to improve models for a top AI lab

AI
AI
PROJECTS
Flame Lion LtdView Project
2019
You can see projects which I developed here
You can see projects which I developed here
Android
Java
C#
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Android
Java
C#
C++
SQLite
PostgreSQL
Amazon EC2
Amazon S3
Xamarin
Kotlin
Objective-C
Rust
Microsoft SQL Server
Swift
Vuforia
VR
Unreal Engine
.NET Core
iOS
.NET
AR
.NET MAUI
Unity
AWS
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Bright Little Labs - Mobile Games and Web ApplicationsView Project
2020
Developed mobile games and web applications for Bright Little Labs https://flamelion.co.uk/portfolio/csa-spy-world https://flamelion.co....
Developed mobile games and web applications for Bright Little Labs https://flamelion.co.uk/portfolio/csa-spy-world https://flamelion.co.uk/portfolio/childrens-intelligence-agency https://flamelion.co.uk/portfolio/csa-spy-world-website https://flamelion.co.uk/portfolio/agent-asha-website-shopify-version
HTML/CSS
Android
C#
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HTML/CSS
Android
C#
Amazon S3
Firebase
Shopify
Google Cloud Platform
Webflow
.NET Core
iOS
Firebase Cloud Functions
Unity
View more