Onur Bulut Mutlu
Mentor
(31 reviews)
US$40.00
For every 15 mins
44
Sessions/Jobs
ABOUT ME
Fullstack & blockchain developer with 25+ years of experience
Fullstack & blockchain developer with 25+ years of experience
Hey, I’m Onur — a fullstack and blockchain engineer with 25+ years of hands-on experience.
I specialize in building scalable SaaS platforms, Telegram automation systems, and Web3 apps that generate real revenue — not just hype.
Founder of SiyahKare Digital Solutions, I’ve helped solo founders, early-stage startups, and scaling teams launch solid MVPs, debug nightmare bugs, and design systems that survive growth.
🔧 Tech I’m confident with:
FastAPI, React, Node.js, Solidity, PostgreSQL, Redis, Docker, Vercel, Telegram APIs, TON Blockchain
🚀 Things I’ve built:
- Telegram-based monetization systems (with coin logic, miniapps, and referral models)
- Subscription-based SaaS apps with AI automation & analytics
- Smart contract platforms (staking, referral trees, NFT-based access control)
- Android security tools (GrapheneOS, Device Owner APIs, AOSP-level lockdowns)
- Custom CRM + dashboard solutions with Stripe, analytics, and user management
I bring not just clean, modular code — but product thinking, monetization strategy, and startup survival instinct.
Let’s turn your idea into a secure, scalable, revenue-generating product.
Turkish, English
Istanbul (+03:00)
Joined November 2016
EXPERTISE
7 years experience
I’m a blockchain developer with deep experience in Solidity and smart contract architecture since the early days of Ethereum.
I’ve built...
I’m a blockchain developer with deep experience in Solidity and smart contract architecture since the early days of Ethereum.
I’ve built and deployed production-grade smart contracts for token economies, staking systems, referral rewards, and NFT-gated access across multiple chains including Ethereum, Polygon, BNB Chain, and TON Blockchain.
My work includes:
- Designing secure token contracts (ERC-20/721/1155/6551)
- Building staking, farming, and vesting mechanisms
- Layer 2 integrations (Arbitrum, Optimism, zkEVM)
- Real-time event listening & off-chain indexing (The Graph, custom webhooks)
- Telegram-integrated Web3 wallets (TON, Jettons)
- Secure deployment pipelines and audits for enterprise use
I prioritize gas efficiency, upgradeability, and security — and always build with real-world usage and scaling in mind.
25 years experience | 2 endorsements
I’m a highly experienced PHP developer with over 25 years in backend engineering, building and maintaining scalable web platforms, API se...
I’m a highly experienced PHP developer with over 25 years in backend engineering, building and maintaining scalable web platforms, API services, and custom CMS solutions.
I’ve led full project lifecycles — from architecture and backend design to deployment, optimization, and post-launch support — across enterprise portals and SaaS platforms.
My PHP work includes:
- Designing and maintaining high-performance RESTful APIs
- Working with modern PHP frameworks (Laravel, Symfony, Slim)
- Migrating legacy systems to scalable, modern stacks
- Refactoring and optimizing monolithic codebases for performance and maintainability
- Deep integration with MySQL, Redis, and external services (Stripe, OAuth, etc.)
I combine deep legacy experience with a modern engineering mindset, always focused on clean code, scale, and long-term sustainability.
10 years experience | 2 endorsements
5 years experience
17 years experience
4 years experience
7 years experience
REVIEWS FROM CLIENTS
(31 reviews)
Mike Upton
November 2019
I continue to have great experiences. I have learned quite a bit over the last couple days. Thank you
Mike Upton
November 2019
Very helpful. Great mentor
Mike Upton
November 2019
It was a pleasure working with Onur. Very knowledgable, patient and accommodating
Mike Upton
November 2019
Great experience! Thanks
Scott Zabriskie
October 2019
Great work! Really appreciated his help in implementing our goals on highly complex projects. He was able to do it in no time at all! A+ across the board. Thanks again Onur!
Alessandro De Marco
October 2019
Onur has been an amazing mentor, understanding the issue I had in a very short amount of time and managed to resolved it very quickly.
On top of that, he showed me he does like to help others without necessarily having something in return and that makes him my first choice for future issues I might have.
I recommend it 100%.
rob
September 2019
great work as usual!!!
Thomas McMurrain
September 2019
Onur was world class - very helpful - great mentor and highly knowledgeable - will definitely use in the future.
Matt Kennedy
August 2019
Onur was great. Added a good solution and debugged it very quickly.
rob
August 2019
great once again!
SOCIAL PRESENCE
parasut-laravel8
Paraşüt Laravel 8
PHP
0
0
kaavekeyfi
Kaave Keyfi
CSS
0
0
EMPLOYMENTS
Independent .NET Consultant
Rafineri Advertisement Agency - Trafo Digital Agency
2012-06-01-Present
.NET Consultant, Microsoft C#.NET Applications Code Review & Optimisation
.NET Consultant, Microsoft C#.NET Applications Code Review & Optimisation
C#
Entity Framework
Microsoft SQL Server
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C#
Entity Framework
Microsoft SQL Server
LINQ
ASP.NET
Asp. net, c#
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Proctive Executive Coach - Achievement Architect
MUTLU Consulting
2010-09-01-Present
ICF – International Coaching Federation - Professional Coaching Training Certificate (10.12.2012) – House of Human Academy
ICF – International Coaching Federation - Professional Coaching Training Certificate (10.12.2012) – House of Human Academy
Project management
Business intelligence
Business development
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Project management
Business intelligence
Business development
Business analytics
Product design
Agile Coach
Business analysis
Agile
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Founder & CEO
SiyahKare Digital Solutions & Consulting
1999-11-01-Present
Chief Technical Officer, CSO, CFO, COO, CHO, CPU
Chief Technical Officer, CSO, CFO, COO, CHO, CPU
HTML/CSS
PHP
jQuery
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HTML/CSS
PHP
jQuery
React
JavaScript
React/react native with redux
Php , laravel
Vue.js
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PROJECTS
Yemek SepetiView Project
2001
Founded in 2001, Yemeksepeti is the first and biggest online food order company in Turkey. As of May 2015, was acquired by the world's bi...
Founded in 2001, Yemeksepeti is the first and biggest online food order company in Turkey. As of May 2015, was acquired by the world's biggest food ordering platform; Delivery Hero. Yemeksepeti has 20.000 contracted delivery restaurants across 67 cities in Turkey. Yemeksepeti more than 10 million registered users and an average of 350.000 orders daily. Additionaly, Yemeksepeti’s other project Yemek.com is a content site about food with 1.000.000 daily unique visitors
PHP
MySQL
Linux
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PHP
MySQL
Linux
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