Hassan A.

Hassan A.

LondonUnited Kingdom
100% Job Success

Sr. Blockchain Developer Expert

Hello, I've been successfully working as an expert in system and software development for the last 10 years. Currently, my focus is shifted to blockchain development as I truly believe that is the new step in the internet revolution and I want to be a part of it. I work with Ethereum, Polygon, BSC, Solana, Avalanche, Fantom, Harmony and am exploring other platforms to understand their current ability to execute smart contracts Tech Stack: - Backend: Python, FastAPI/Flask/Django, Postgres/TimescaleDB, Redis, Celery, Kafka, Elastic Search, Websockets, Node.js/Express.js/Mongo - Blockchain: Solidity, Rust on ETH, BNB Chain, EVM Chains, Solana, NEAR - Frontend: React.js, Next.js, Redux, Typescript, Nest.js - App Dev: React Native, Flutter - UI/Ux: Figma
Rating is 5 out of 5.
5.00 Feb 14, 2023

"Hassan is incredible talent found in Upwork, I have worked with him twice and he provides me the best solution and help me the in the Web 3.0 space. And I definitely work with him again. Thank you."

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Rating is 5 out of 5.
5.00 Feb 8, 2023 - Feb 12, 2023

"Hassan is very nice. He did the work on time and is ready to handle modifications when needed. I was totally stuck at the time when I meet him here before launching my project, he really help me in solving my issue and completed the work very fastly. I rally appreciated him effort & I'll definitely will work with him again👍🏼"

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Rating is 5 out of 5.
5.00 Sep 4, 2022 - Sep 5, 2022

"Very good to work with. He is fast and follows through. Good communication Great person"

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Rating is 5 out of 5.
5.00 Sep 2, 2022 - Sep 5, 2022

"Very knowledgeable and very detailed in his craft. He welcomes any questions you have or anything you'd like to review again - shows lots of patience. In addition, he is very reliable!"

"Thank you!"

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Rating is 5 out of 5.
5.00 Sep 8, 2021 - Nov 9, 2021

"A very cool blockchain developer. Even though we were busy, they did a great job. Thank you."

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Rating is 3.1 out of 5.
3.10 Dec 5, 2020 - Aug 9, 2021

"As with their other reviews they promised alot but delivered little. We paid good money in advanced in good faith only to be let down. I think they suit smaller scale projects not complex or advanced projects. Excuses aside they breached their contract there where failings from both sides however we didn't clarify in detail all of the technical work required which lead to bottle necks as they lacked some of the skills in the advert description. My advice would be to ensure they clearly scope all the work required for the project to be delivered as this is the responsibility of both parties especially if you non technical and if they can’t complete a project or see potential issues they deal with them before taking money from a client. I am happy to provide more details on my feedback if requested. Hopefully they do a better job with you sometimes its just bad luck."

"“Good money in advance” and prolonging that amount to an extended period of amount are two different things. Anyway, 10 months despite 7500 paid out of 20,000 is enough to clear my conscience. I wish him best wishes for his project."

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Rating is 4.7 out of 5.
4.70 May 3, 2021 - May 12, 2021

"Great guy, thank you for all the hard work. I will come back for sure!"

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Oct 3, 2020 - May 12, 2021

No feedback given

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Rating is 1.45 out of 5.
1.45 Sep 17, 2020 - Dec 11, 2020

"We ended up paying $1000 for a broken app which we cannot use. Sadly over promise and under deliver. This is the type of free lancer we want to avoid. He gets free $1000 and we gain a $1000 loss."

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Rating is 5 out of 5.
5.00 Sep 27, 2020 - Sep 28, 2020

"what a pleasure to find a professional and mainly very kind and effective person. dont hesitate!"

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Hassan A. has more jobs. Create an account to review them


  • Mobile App Development
  • Graphic Design
  • Blockchain
  • Golang
  • Machine Learning
  • Blockchain Architecture
  • Artificial Intelligence
  • Distributed Ledger Technology
  • Web Component Design
  • Blockchain Development
  • UX & UI
  • Bot Development
  • Metaverse
  • DApp Development
  • Smart Contract Development

Get started working with Hassan quickly with these predefined projects.

Get started working with Hassan quickly with these predefined projects.

You will get design mobile app ui ux and prototype

From $150
3 days delivery