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Julien Atanasyan

Développeur blockchain et Fullstack JS / AWS

Can work in or around Cannes

  • 43.557963
  • 7.003061
  • Suggested rate €550 / day
  • Experience 7+ years
Propose a project The project will begin once you accept Julien's quote.

This freelancer is available full-time but hasn't confirmed their availability in over 7 days.

Propose a project The project will begin once you accept Julien's quote.

Location and workplace preferences

Cannes, France
Can work onsite in your office in
  • around Cannes and 50km


Project length
  • ≤ 1 week
  • ≤ 1 month
  • Between 1-3 months
  • Between 3-6 months
  • ≥ 6 months
Company size
  • 1 person
  • 2-10 people
  • 11 - 49 people
  • 50 - 249 people
  • 250 - 999 people
+2 other


Freelancer code of conduct signed
Read the Malt code of conduct

Verified email


  • French

    Native or bilingual

  • English

    Native or bilingual


Skills (10)

Julien in a few words

Développeur depuis plus de 10 ans, j'ai travaillé sur beaucoup de technologies dont Mobile et Web.

Les dernières années je me concentre à développer des Applications Blockchains décentralisées en utilisant Javascript / Typescript, AWS et Solidity.

Je suis certifié AWS et ai participé à créer l'architecture de plusieurs systèmes.

J'ai développé 2 plateformes NFT et écrit plusieurs smart contracts utilisant les standards ERC.

Je suis bilingue en Anglais ayant vécu 10 ans au Royaume-uni.



Solidity development of ERC Smart contracts on Ethereum and Matic  - As a freelancer

December 2022 - Today (2 months)


Head Of Engineering

London, UK

October 2021 - December 2022 (1 year and 2 months)

In charge of managing the technical team that develops a whitelabel NFT Marketplace, I am responsible for hiring talents including developers, DevOps, and QA engineers, up to 10 people. Using Agile Scrum and Kanban across different projects and features, I work with the technical team to define the architecture of the platform and the best ways to utilize frameworks and libraries and also work closely with the product team to define and translate requirements into stories.
- Designing the system architecture, fully hosted on several AWS accounts
- Deployment including Docker, Kubernetes on EKS, and Fargate with Terraform
- Integrate the marketplace with the Aventus Blockchain
- Communicate with the Ethereum Network and the Metamask Wallet
- Ethereum smart contracts implemented using Solidity
- Developed solutions for managing Custodial Crypto wallets and KYC flows
- Backend on ExpressJS/NestJS, Frontend on ReactJS/NextJS, using Typescript
- Solutions for monitoring and tracking our applications with Elasticsearch, Sentry, and Google Analytics
- Databases fully hosted on AWS using MongoDB and DynamoDB
- Using mostly a TDD approach for implementing our solutions, including Unit, Integration, and automated testing

Newcross Healthcare Solutions

Chief Technology Officer

London, UK

April 2018 - September 2021 (3 years and 5 months)

Leading the company's IT needs, development and architecture of a brand new Platform "microservices oriented" fully hosted on AWS. I manage a team of 12 from Developers to Systems administrators with Agile Sprint planning using SCRUM and Kanban on various projects. A hands-on role with a 70/30 split between Management and technology, I facilitate communication between every department in the business and the technical team, creating technical requirements, defining the architecture and participating in code reviews, create plans for testing, continuous integration, deployment...
- Backend with NodeJS and Feathers JS hosted on EC2 with Docker.
- Frontend applications with ReactJS, React-Native and native SDKs.
- Use of S3, Amplify, Cloudfront, [email protected], CodeDeploy and Jenkins.
- Elasticsearch/Kibana for Analytics and Reporting Dashboards.
- SQL Databases on RDS and EC2 and Redis for caching.
- Backend fully decoupled using SQS, RabbitMQ, Websockets and Lambda.

Newcross Healthcare Solutions

Technical Team Lead, Node JS and React Native Projects

London, UK

March 2017 - April 2018 (1 year and 1 month)

Leading the development of the new system and mobile apps. Using React Native for the apps, React JS for the web solutions and Feathers JS for API. I plan the sprints with the dev team, drive the technical choices, architecture, frameworks and technologies.


Lead iPhone and Apple TV Developer - ATP Tennis TV

London, UK

August 2016 - March 2017 (7 months)

Developed within a small technical team, the application allows customer to subscribe and watch live streaming and Replays on iOS and tvOS.
- Agile Sprint planning.
- Designing the internal architecture and UI, frameworks...
- Communication with a REST api.
- Core Data for SQLite database.
- Swift 3 and Swift Framework shared between iOS and tvOS.
- Alamofire, Mixpanel, Google Analytics.

Asteria Cleaners

Co-founder and CTO

July 2014 - November 2016 (2 years and 4 months)

With the Executive team, I create a strategy to manage both the customers and drivers experience through Web Solutions, Mobile applications and backend (Web services) hosted on AWS. I focus on creating the architecture on AWS for hosting Webservices and applications, train multiple developers on web and mobile technologies and designers to build a solid technical team for the company. I work under Agile sprints and plan tasks and training for the members of the team. Technologies: Java, ZF2, JQuery, AngularJS, HTML5+CSS3, React-native + Native iOS and Android.

Gametech Limited

Lead Full Stack Developer

London, UK

February 2016 - August 2016 (6 months)

Leading a new project in the Gambling / Gaming area. The iOS application in Swift contains several game developed with Unity3D and Twitter API backed with an AWS (EC2, Lambda ans DynamoDB) server. Evolving in an Agile environment, I manage, architect and develop the project within a small team of iOS developer, unity developer and designer. Technologies:
- Unity 3D
- Swift
- PubNub
- AFNetworking
- Twitter API
- Lamba
- EC2
- Dynamo DB
- Elasticache

With Reason

Senior iOS Developer

London, UK

November 2014 - January 2015 (2 months)

Develop a new application from scratch with iOS7/iOS8.


Lead Mobile Developer

May 2014 - September 2014 (4 months)

Responsible to lead a new project for a well-known Bank. Working in an Agile environment, I plan and make the technical choices for this project involving:
- Create user stories and define sprints.
- Define global architecture (back + front).
- Define endpoints to be used.
- Define mobile framework and architecture.
- Give advices to both Agency and client for the implementation and distribution of the application. The project is a native Android/iOS application using different framework but mainly native SDK for development and testing.


Senior Android Developer

February 2014 - April 2014 (2 months)

Integrating a team on an existing project, I am in charge of the development of a part of this project for a famous car brand. Using Android SDK 4+, Google Maps API, Geofences and several third-party libraries such as GlowPadView, GSon, Robospice... I work on both UI and communication using REST/Json with a remove server. Responsiveness, optimizations and good coding style (respecting Android guidelines) are main requirements of this project.

Fujitsu Technology Solutions

Lead/Senior Mobile Developer for Fujitsu - Boots

December 2013 - February 2014 (2 months)

Leading the development of new Mobile solutions for Boots within Fujitsu Team.
- Concept frontend and backend architecture and choose best technologies/ Framework.
- Analyze risks and planning for User Stories.
- Work under Agile sprints.
- Several parts involved in the project :
- Backend with Spring MVC, Hibernate with a JBoss Server and Oracle Database.
- 2 in-house native iPad application for Boots store.
- iOS 7 framework.
- Complex UI requirements using constraints & autolayout.
- Sencha Application for Apple Store & Google Play developed with another Team. Work in a small team directly with Customer and testers.


Manager of a Small Company in web and sotware development

May 2010 - December 2013 (3 years and 7 months)

From July 2013, I am working at full time as self-employed, I carried out several projects from customer relations to development with small team I managed, some examples :
- Android native application (+ Launcher) for a detax Company.
- Full responsive Website (w/ bootstrap and Zend Framework2) for a startup "Watch-it-buy-it".
- Several Java/J2EE Application.
- e-commerce websites solutions w/ Paypal checkout API. Self-employed in web and sotware development. I purpose to companies to develop web sites and softwares. I have done several web sites using PHP, Javascript, html and css. Some website uses Zend Framework and JQuery Library or ExtJS. All are managed by the customer via a BackOffice, linked with MySQL Database. I also integrate several SEO (Search Engine optimization) tools for my customers and integrate Facebook, Twitter and Google+ API for status update. News integration with RSS Feed, sitemaps, tracking with Google Webmaster tools, I also carry out software using C#, .NET (4.0/4.5) or using J2EE (mainly for multiplatform), Spring and Hibernate. I realized many Mobile application for customers and myself (as seller on the Store). I use several technologies, Sencha Touch 1 and 2 for Android/IPhone application and Android Graphics for development of Android Games. I am actually working on a game using "Android Graphics" and multi-platform application using "Sencha Touch" and "ExtJS". Please visit my website for more informations:


Management and development of a responsible Web-site for startup (WIBI)

September 2013 - November 2013 (2 months)

Development and analysis of the project based on customer needs.
- Analysis of the database under mySQL.
- Development of the website server using Zend Framework 2.
- Full responsive design using HTML5/CSS3 and Twitter Bootstrap.
- Backoffice for product and news management.
- Use of Media Queries (CSS3) and JQuery library.
- Responsive on computer browser and Mobile browser.


Management and development of a mobile project for EuroTaxFree

July 2013 - August 2013 (1 month)

Project management, technical choices and development of Android application. Development and analysis of the project directly with the client.
- Advice on technical choices.
- Analysis of the project architecture.
- Choice of SDK and languages. Development of an "In-house" application for customers of the company for sending tax removal informations.
- Application "rooted" on Android mobiles.
- Link to a C#.NET WebServices for sending data.
- Development of a Launcher to lock the phone on the application only.
- Management of APK and resources update from external server based on files Hash (MD5).
- Encrypted communications using RSA.
- Link to Bluetooth Printer.
- Communication between all APKs using broadcast Messages.
- Scenarios of "tax removal and refurbish" using dynamic interfaces based on Android Fragment.

ESII Media Accueil

Mobile Technologies Expert

January 2013 - June 2013 (5 months)

In charge of the design, architecture and choice of technology for the development of mobile Application at ESII. My principal mission was to decide best languages and design pattern to use to develop mobile solutions and Web Serviced linked to existing solutions. Mobile application are mainly developped using native languages such as Java (Android) and Objective-C/Cocoa (iOS). Several functions and API are integrated to applications such as Push Notifications and Google Maps API. Server and Webservice (Both SOAP and Rest) are developed using Java/ J2EE, Tomcat Server, CXF WS and JSP for interfaces.


Software and Mobile Developer in mission at Orange France

06250, Kedah, Malaysia

September 2011 - December 2012 (1 year and 3 months)

Developing applications for the various services of Orange. Advice and development of mobile APP (Android, iOS & Windows 8) for Orange France, work in Small & Medium Team. Development of Chrome "By Orange" browser, "Orange Adventurer", based on Chromium, in C++ and Python. Development in C++ of solutions for communication between browsers and windows (C++ using sockets and multithreaded environment). In C# and .NET, development of solutions related to Internet Explorer and using C++, html, js and XUL for Firefox. Also using Win Api in C++. Development of web Solutions using HTML/HTML5, CSS/CSS3 and Javascript. I also worked on Facebook and Twitter API. Training at Microsoft Conference Center on Windows 8 development. Development of Windows 8 applications for Orange Services on Windows 8 Tablet PC using C# and XAML (WinRT). Support Mobile Team to develop Orange Mail Mobile Applications. As part of Orange challenges, application development and Widgets on iPhone and Android.


Mobile, J2EE and SQL Server Developer


August 2011 - September 2011 (1 month)

Development of Mobile App for banking area, on Android and Ios using JQuery Mobile and PhoneGap. Development of a REST server based on J2EE (Servlets and Spring Security) using Jetty Server and Maven linked to a MS SQL Server. Exchange of data via Ajax on (JSON gzip data) and stored in SQL Server database.


Software Developer for CNRS - astronomy research center

April 2009 - August 2009 (4 months)

I have began by a DUT internship of 8 weeks followed by a 10 weeks employment contract. I have developed several software , databases and tools to stores data related to project in California (Mount Wilson Observatory). The software were developed in C/C++, Python and Java using GTK+ and QT. The database used MySQL Engine and InnoDB to manage relationships.