The Best Blockchain Developers For Hire In Armenia

5.0/5
(6 jobs)

As a Full-Stack Software Developer, I have acquired advanced programming skills and have developed a hardworking mentality throughout my 8+ years of progressive experience in the field. With a solid understanding of the IT industry, including software, hardware, and networking, I have honed my skills in various technologies and frameworks. ✅ My expertise lies in JavaScript and its popular libraries and frameworks, including TypeScript. I have a thorough understanding of software design principles and patterns, which I apply to develop scalable and maintainable software systems. My experience in front-end technologies such as React.js, Redux, HTML, CSS, LESS, and Bootstrap, coupled with my expertise in server-side JavaScript (Node.js), allows me to develop full-stack applications efficiently. ✅ Furthermore, I have a deep understanding of blockchain and web3 technologies, and have successfully developed decentralized applications using these tools. My experience in this area includes building smart contracts, developing decentralized applications, and integrating blockchain technologies into existing systems. ✅ Additionally, I have experience in C/C++ and libraries such as Boost and STL, which has given me a solid foundation in programming languages beyond JavaScript. I am proficient in RESTful API development and have a background in OOP, Design Patterns, and Microservice Architecture. ✅ My experience in database design, including MongoDB, PostgreSQL, MySQL, and Redis, combined with my expertise in unit and end-to-end testing, ensures that I develop reliable software systems. I am well-versed in AWS technologies, such as Lambda, API Gateway, DynamoDB, S3, SNS, and SQQ, and have hands-on experience in automated development processes. Moreover, I have experience in GraphQL and Apollo, which adds to my proficiency in developing scalable and efficient software systems. As a good communicator, I can effectively collaborate with clients and teams to develop software systems that meet their requirements. With my expertise and experience, I am confident in delivering high-quality software solutions that align with the client's business goals. Overall, my skills as a Lead Full-Stack Engineer and blockchain/web3 expert make me an ideal candidate for any project requiring high-quality, scalable software solutions.

Blockchain

React

AWS Lambda

Docker

MongoDB

NestJS

PostgreSQL

CI/CD

Web3

TypeScript

Node.js

JavaScript

Solidity

4.7/5
(2 jobs)

I have over ten years of experience efficiently coding, designing and implementing websites and applications using modern programming languages. I am looking for interesting and challenging projects to participate in and have my input into something quite amazing.

Blockchain

Ethereum

NFT

Solidity

Smart Contract

Solana

Brand Identity

CSS 3

HTML5

PHP

JavaScript

React

Search Engine Optimization

Adobe Illustrator

4.9/5
(24 jobs)

I am a co-founder and CTO of ABSM Data Solutions. My team will 𝗱𝗲𝘀𝗶𝗴𝗻 𝗮𝗻𝗱 𝗶𝗺𝗽𝗹𝗲𝗺𝗲𝗻𝘁 𝗮 𝘀𝗰𝗮𝗹𝗮𝗯𝗹𝗲 𝗗𝗮𝘁𝗮 𝗣𝗹𝗮𝘁𝗳𝗼𝗿𝗺 ingesting data from any sources, optimizing storage costs for 𝟭𝟬𝟬𝗧𝗕𝘀+ 𝗼𝗳 𝗱𝗮𝘁𝗮, and streaming data into your analytical and production systems 𝘄𝗶𝘁𝗵 <𝟭𝟬𝟬𝗺𝘀 𝗹𝗮𝘁𝗲𝗻𝗰𝘆. 🤝 𝗪𝗵𝗮𝘁 𝘆𝗼𝘂 𝗴𝗲𝘁 𝗵𝗶𝗿𝗶𝗻𝗴 𝘂𝘀 — Quality: I will 𝙥𝙚𝙧𝙨𝙤𝙣𝙖𝙡𝙡𝙮 track the implementation progress and keep you posted. — System design: we will help you understand your technical needs and design a Data Platform for your particular use case. — End-to-end approach: we will implement a working 𝗠𝗩𝗣 𝗶𝗻 𝗮𝘃𝗲𝗿𝗮𝗴𝗲 𝟮–𝟯 𝘄𝗲𝗲𝗸𝘀. — Experience: 𝟭𝟬 𝘆𝗲𝗮𝗿𝘀 𝗵𝗮𝗻𝗱𝘀 𝗼𝗻 building with AWS, GCP, etc. using Airflow, BigQuery, ClickHouse, Kafka, S3, Redshift, Snowflake, Spark, Hadoop. 🔥 𝗢𝘂𝗿 𝗿𝗲𝗰𝗲𝗻𝘁 𝗽𝗿𝗼𝗷𝗲𝗰𝘁𝘀 — Collected 𝟱 𝗧𝗕𝘀 𝗼𝗳 𝗯𝗹𝗼𝗰𝗸𝗰𝗵𝗮𝗶𝗻 𝗵𝗶𝘀𝘁𝗼𝗿𝘆 to calculate and display Ethereum wallets balances 𝘄𝗶𝘁𝗵 <𝟭𝟬𝟬𝗺𝘀 𝗹𝗮𝘁𝗲𝗻𝗰𝘆. Using: ECS, S3, DynamoDB, Athena, Glue. — Connected data from 𝟭𝟱 𝗺𝗮𝗿𝗸𝗲𝘁𝗶𝗻𝗴 𝗮𝗻𝗱 𝗲-𝗰𝗼𝗺𝗺 𝗮𝗱𝘀 𝗰𝗮𝗯𝗶𝗻𝗲𝘁𝘀 to report marketing ROI via real-time dashboards. Using: Airflow, ClickHouse, Tableau, Superset, Kinesis. — Scalable ML infrastructure for trends analysis and anomaly detection for investment funds, 𝗶𝗻𝗰𝗿𝗲𝗮𝘀𝗶𝗻𝗴 𝗿𝗲𝘃𝗲𝗻𝘂𝗲 𝗯𝘆 𝟯𝟴%. Using: GCP, Dataflow, FB Prophet. — … and more than 40 other various complex solutions! 🟢 𝗪𝗵𝘆 𝘂𝘀? 1. You define a 𝘣𝘶𝘴𝘪𝘯𝘦𝘴𝘴 goal, we offer the fastest and the most efficient solution. 2. We deliver the solution end-to-end: from design to implementation and maintenance. 3. Average MVP delivery: 2–3 full-time weeks. 4. Fully documented project: we will transfer the necessary knowledge to your team to optimize your costs for maintenance and further development. 5. Near 100% uptime of the system (depends on the cloud provider's uptime). 6. Data ingestion at 10,000 requests per second (AWS) and higher. 7. Storage of 5TB of uncompressed data for $5 monthly (S3). 8. Quick data transfer to your systems: <100ms latency. 👨‍🎓 𝗔𝗰𝗮𝗱𝗲𝗺𝗶𝗰 𝗲𝘅𝗰𝗲𝗹𝗹𝗲𝗻𝗰𝗲 Master's degree in Computer Science. Authored a scientific paper in Big Data and Computer Science. I am an active open-source contributor: my Airflow ClickHouse Plugin is in top-1% of Python packages worldwide. See my code: github.com/bryzgaloff 🤙 𝗟𝗲𝘁’𝘀 𝗵𝗮𝘃𝗲 𝗮 𝟯𝟬 𝗺𝗶𝗻𝘂𝘁𝗲𝘀 𝗰𝗮𝗹𝗹! Sign up for a free 30-minute video call: you describe your task in business terms — I tell you possible solutions and steps to implement. In three business days, I will provide timeline and cost estimations.

Blockchain

ClickHouse

Amazon Web Services

Data Warehousing

Big Data

Cloud Architecture

Cloud Computing

Apache Hadoop

Apache Spark

ETL Pipeline

Apache Airflow

Kubernetes

Python

SQL

5.0/5
(6 jobs)

As a publishing editor, chief evangelist, and product marketing manager for technology companies over the past 8+ years, I help both startups and market leaders nurture their customer base, expand their reach and grow their revenue. My technology marketing experience spans diverse verticals in the space, including augmented reality, fintech, hospitality management, integrated software development environments, and database technologies. Currently in my remote role as Product Marketing Manager for Texas-based Embarcadero Technologies, a member of the Idera family, I develop and oversee the content marketing plan for the company's software development tools, ensuring every piece of content aligns with our goals and performs optimally across all channels. / --- AI and Human Content Generation Workflow --- / I combine AI and my own writing prowess to generate quality content efficiently. I employ my own prompting strategy with specialized prompts, knowledge bases, SEO information, references and detailed contextual information to generate accurate and engaging content. I then proceed to human post-editing that ensures the message is on point, also embellishing the content with statistics, quotes and anecdotes to enhance the quality of the published final product and ensure accuracy, creativity, and a natural flow. My AI skills include: Prompt engineering for optimal LLM output Content generation using a variety of LLM platforms Post-editing and refining AI-generated content Integrating AI tools into existing content workflows Content Creation and Marketing As a marketing copy and content creator, I create content that is: Empathetic: Resonating with the reader's concerns Eloquent: Expressing ideas beautifully Effective: Driving desired actions and emotions My content creation skills encompass: Developing AI-enhanced content marketing strategies Creating high-converting marketing copy using AI tools Curating and repurposing existing content Developing and testing new content ideas Editing and proofreading Managing third-party content production Content performance audits and optimization SEO and information design I am also comfortable generating any content type and format: AI content writing Content marketing SEO content generation Technical writing Copywriting Editing & proofreading Product Marketing / --- Highlights --- / Authored "Learn iOS Application Distribution," recognized as one of the best new game design books of 2018. Created an infographic in February of 2025 celebrating the 30th anniversary of the Delphi programming language, showcasing its evolution alongside major tech advancements. / --- Why Partner With Me --- / Proven track record of $100K+ in successful Upwork projects Top Rated Plus status with 100% job success score Expertise in both technical and creative content Comprehensive understanding of AI tools and content optimization Well-thought-out solutions that improve marketing ROI Diverse skillset creating added value 25+ years of remote work experience, both solo and in a team Dedication, focus, and endless enthusiasm Self-starter requiring minimal supervision / --- What My Clients Are Saying --- / "A++ // Hagop is a top notch service provider... not only is he attentive... but perhaps more importantly, he has a wealth of knowledge that he actively shares which makes for a great collaboration... highly recommended and will work with him again!" "Hagop's a responsive, versatile, and consistent professional. He has a wide range of skills, and can take on any task comfortably and deliver within the set deadlines. He delivered the content we needed on multiple projects and also helped a client build his business to seven figures. We're very happy to have worked with him and will continue working with him." "Excellent freelancer! Very reliable and is a great asset to our team. Highly recommended!" / --- Soft Skills --- / Flawless native-level English | Technical proficiency in a broad range of software tools | Leadership | Time Management | Teamwork | Quality focus | Attention to detail / --- Software Skills --- / Desktop publishing: Microsoft and Google suites AI Tools and LLMs: Claude, Gemini Pro, ChatGPT Teamwork and task management: Google Suite, Jira, Asana, Trello Illustration: Photoshop, Illustrator, Canva Web Publishing: WordPress, HTML & CSS Marketing Automation: Salesforce, Eloqua, Hootsuite, Hubspot, Buzzsumo, Mailchimp SEO & Analytics: Google Analytics, Semrush, Ahrefs, Yoast

Blockchain

Editing & Proofreading

Blockchain, NFT & Cryptocurrency

Ebook Writing

Copywriting

Article Writing

Marketing Management

Copy Editing

Book Writing

Newsletter Writing

Ghostwriting

Content Writing

SEO Writing

Search Engine Optimization

5.0/5
(5 jobs)

Hello, I'm a python/Django developer with more than three years of applied programming, primarily as a freelancer. I'm an active contributor to multiple open-source python packages. I know that code is read much more often than written, so my primary focus is long-term maintainability. I can begin from scratch and deploy the solution following best practices. My favourite stack: * Python 3 to power the whole world of backend * Django & Django rest framework or Flask to be bare bones of an application * HTML5, SCSS and ReactJS to achieve positive user experience on the frontend * PostgreSQL (ideally as an RDS instance) and Redis databases to store the data * Amazon AWS Lambda for serverless deployment, with API Gateway and other useful components surrounding it * Docker and docker compose to ensure stability and reproducibility in dev environment * Pytest and coverage.py to catch the bugs * Mypy, ruff, and various linters with pre-commit to ensure code quality and readability I'm NOT ready to work with Windows development - I'd rather live without jumping through hoops for no reason. Hobbies and interests: blockchain, molecular biology, hiking. I'm always happy to discuss new ideas, so please feel free to contact me and ask your questions.

Blockchain

Amazon

Terraform

Docker

React

AWS Lambda

CI/CD

Python

JavaScript

Bash

Linux

Redis

Django

CSS

PostgreSQL

5.0/5
(3 jobs)

Highly skilled and knowledgeable senior .NET developer with over 10 years of experience developing and maintaining web applications. I specialize in the development of crypto applications, crypto bots and crypto wallets. I’ve also got expertise in crypto exchanges, crypto diaries and automated trading platforms. My team has developed a full infrastructure code (FACT) to transfer all data between subsystems, to collect data and to emulate exchanges. I have already developed Binance, ByBit, Kucoin, FTX, Garantex, dYdX, Stellar, Tradier, and more exchange connectors for Spot, Futures, Equity, Options and more. I’ve also used such connectors as TradingView, Telegram and a large number of other services. This infrastructure code is available for your project. I have a deep understanding of the .NET platform and related technologies, including HTML, CSS, JavaScript, AJAX, and SQL Server. I can develop and deploy complex applications using WPF/C#, ASP.NET/C#, Xamarin, MAUI . I’ve got experience in developing applications for both Windows and web platforms. I’d be glad to discuss your project with you either in chat or on a voice/video call!

Blockchain

Decentralized Exchange

ASP.NET MVC

Entity Framework

JSON

SQL

Xamarin

ASP.NET Core

.NET Core

HTML

JavaScript

C#

Microsoft SQL Server

.NET Framework

Azure DevOps

5.0/5
(4 jobs)

Hi, I’m Norik Khachatryan, a seasoned Flutter Developer and Master’s student in Computer Information Sciences. With 4+ years in the tech world—co-founding startups, building scalable apps, and diving deep into AI & ML—I’ve honed my skills in crafting advanced, user-centric mobile solutions. Why Work With Me? Startup Expertise As a co-founder and lead Flutter developer in multiple startups, I’ve turned big ideas into profitable realities. I understand the fast-paced demands of new ventures and excel at launching successful products quickly. AI & ML Enthusiast While Flutter is my specialty, my passion for AI and ML means I’m ready to incorporate smart features and future-proof your projects. Agile Methodologies I live and breathe SCRUM, ensuring efficient workflows, clear communication, and on-time delivery. Deadlines are met with precision and zero compromise on quality. Academic Foundation My Master’s in Computer Information Sciences provides a robust technical background and problem-solving mindset, powering me to engineer solutions that stand out. Versatile Portfolio From healthcare to fintech—and everything in between—I’ve spearheaded projects of diverse scopes, each enriched with top-tier Flutter solutions and a strategic touch of AI. Continuous Learner The tech landscape evolves daily. I keep pace by regularly upskilling, so your project benefits from the latest tech trends and best practices. Let’s Collaborate If you’re ready to transform your vision into a digital powerhouse, let’s connect. I’m all about building innovative products that not only shine today, but are ready for the challenges of tomorrow.

Blockchain

Figma

NodeJS Framework

Git

SQL

MongoDB

Android

iOS

Firebase

Swift

JavaScript

Kotlin

Flutter

Java

5.0/5
(1 job)

Hello! I'm Kirill, an architect and DeFi engineer developing custom blockchain solutions since 2017. I've led a wide range of projects in Decentralized Finance (DeFi), DApps, NFTs, Metaverse DAO, and Central Bank Digital Currencies (CBDC). My goal is to transform ideas into impactful solutions in the decentralized tech space, specifically at the intersection of AI and Web3. I've been in IT since the 1990s, managing software engineering and IT architecture teams (telecom and cloud, ex-Cisco SE). I lead blockchain development at Definme, a team of experts that has helped our partners take their ideas from the discovery phase to launch and maintenance. 🏆 Me and my team proudly won 10+ hackathon trophies and have partnered with a number of market leaders. We designed and implemented the first releases of the Lido liquid staking platform with TVL over $14B. Blockchains we use in our projects include EVM-based chains like Ethereum geth and its various forks, BNB Chain, Celo, Gnosis, Fantom, and Cosmos/Tendermint SDK (EVMOS), as well as zk/optimistic rollups such as Polygon, Optimism, zkSync and Avalanche. Non-EVM platforms include TRON, TON, NEAR, Tezos, Filecoin, and Ethereum 2.0 beacon chain. Languages, frameworks, and libraries: Rust, Solidity, Web Assembly, Web3 (JavaScript, TypeScript, Python), Ethers, GoLang, OpenZeppelin, Aragon DAO, Hardhat (previously truffle, brownie, ganache), IPFS, TheGraph, Uniswap V2 and V3. I am open to new opportunities and would love to learn about your project. Drop me a message by hitting the "Invite" button, and let's talk.

Blockchain

Metaverse

React

API

DigitalOcean

Google Cloud Platform

AWS Development

Docker Compose

Grafana

Hardhat

Docker

PostgreSQL

Django

Web3

Solidity

4.7/5
(8 jobs)

Hi StartUpers, With a foundation in Blockchain and Smart Contract Development, enhanced by over two years of focused experience, and a robust 13-year background in full-stack web development, my journey has been marked by a passion for innovation and excellence. My skill set extends through Node.js and PHP and into advanced technologies like MySQL, PostgreSQL, ClickHouse, Redis, ElasticSearch, and AWS, allowing for the creation of forward-thinking solutions. Beyond my technical capabilities, I bring valuable insight from my involvement in two startups, where I embraced the challenges of rapidly evolving environments and contributed to shaping versatile, resilient products. This experience has honed my ability to adapt, innovate, and lead in projects that are not just about coding, but about making a tangible impact. I’m on a mission to help clients unlock the potential of blockchain, transforming ambitious ideas into groundbreaking realities. Let’s innovate together, turning the challenges of today into the successes of tomorrow.

Blockchain

Blockchain, NFT & Cryptocurrency

Blockchain Architecture

Solidity

Elasticsearch

Vue.js

PostgreSQL

MySQL

ExpressJS

Node.js

Laravel

PHP

5.0/5
(4 jobs)

As a seasoned Team Lead, I excel in guiding tech teams towards achieving exceptional results. My strengths lie in effective communication, strategic planning, and fostering a collaborative team environment. I have a proven track record in leading successful software development projects, with a keen focus on innovation and efficiency. Key accomplishments include the successful launch of multiple high-profile projects and the implementation of agile methodologies that significantly improved team performance. My educational background in computer science, combined with continuous professional development, ensures I stay at the forefront of technological advancements. In summary, my blend of leadership skills, technical expertise, and a commitment to excellence positions me as an asset to any project or team.

Blockchain

Smart Contract

Adventure

Hybrid App Development

Unity

Simulation Game

Microsoft Windows

Android

iOS

Puzzle

5.0/5
(11 jobs)

Fullstack Expert of 6 years My techstack: Server side development : - PHP/ Laravel/ Lumen - DBs: MySQL/ PostgreSQL/ MongoDB/ Firebase/ Firestore - Restful, JSON, - NodeJS/ ExpressJS/ NestJS - APIs / GrpahQL/ Apollo client Serverless: - AWS/ EC2/ S3 buckets Client side development: - JavaScript/ TypeScript/ ES6+ - ReactJS/ VueJS/ Angular2+ - State Management/ Next.js/ Redux/ Nuxt.js/ Pinia - HTML/ CSS/ Tailwind/Bootstrap Developing interesting projects and making my clients happy is my passion. I would be thrilled to get a chance to help you out with your craziest ideas and help you achieve the success you deserve. See you! Shant

Blockchain

NestJS

Tailwind CSS

Bootstrap

React

Angular

JavaScript

MySQL

Node.js

PHP

GraphQL

Laravel

MongoDB

Vue.js

0.0/5
(0 jobs)

Greetings all, I represent an award-winning company called LITSLINK. We are a product-oriented development team (which consists of 250+ highly qualified software engineers, UI/UX designers, business analysts, project architects, project managers, and QA engineers) experienced in almost all popular areas: ✔️AI: Machine Learning, Computer Vision, Natural Language Processing, Big Data Analytics ✔️No-code, Low-code: Bubble, WebFlow ✔️Blockchain: Solidity, Rust, Solana/Near blockchains, smart contracts ✔️Cross-Platform Mobile development React Native, Flutter ✔️Web development: Front-end (React.JS, Vue.JS, Angular.JS); Back-end (Node.JS, Java, Python) ✔️AR/VR: Untiy3D/C#, Hololens, Hololens 2, GearVR, MS Mixed Reality, Oculus, HTC Vive, iOS/Android (AIRKit, ARCore) We provide smart and fast solutions on time and on budget. By hiring us, you are getting the expertise of our software architect board and the whole team's knowledge. Whether you need a single developer or a whole team, we are here to help.

Blockchain

CSS

Adobe Photoshop

Node.js

Mobile App Development

OpenAI API

Python

Web Development

Machine Learning

Flutter

React

Ruby

Back-End Development

Generative AI

0.0/5
(0 jobs)

Hi all, I'm a client-focused, strategically thinking IT Account Manager with vast expertise developing and implementing large and complex IT projects for businesses of all kinds, from startups to corporations. My primary goal is to ensure that our LITSLINK team provides not only bespoke software development but also what the client's organization requires to achieve its business goals in the quickest possible time. Why can you totally rely on us ? 👌 🚀 At LITSLINK, we're the bosses of the Software Development Life Cycle, from wicked planning to flawless deployment and beyond. Our crew? 250+ top experts with 5 years of average experience each. We're the real deal with over $30 mil in earnings and 2100+ projects in the bag, including 100+ startup success stories. Our main focus is: 🦾Generative AI: Computer Vision (Stable Diffusion, etc.), Natural Language Processing (ChatGPT), Data Science 🔬Business Analysis & Product UX/UI Design ➡️Front-end: React.JS, Vue.JS, Angular.JS ⬅️Back-end: Node.JS, Ruby on Rails, Python, Elixir, Java, 📲React Native, Flutter 🕹️AR/VR: Unity3D/C#, Hololens, GearVR, MS Mixed Reality, Oculus, HTC Vive, iOS/Android (ARKit, ARCore) ⛓️ Blockchain, NFT, Web3: Solidity, Rust, Solana/Near blockchains 💭Cloud Services: AWS, GCP, Docker, Kubernetes, Digital Ocean, Heroku 🛠️DevOps: Nginx, Jenkins, Gitlab, Ansible, Terraform, Chef Let's jump on a quick call to discuss all the details of your project :tornado:

Blockchain

Node.js

React

Back-End Development

Python

Generative AI

OpenAI API

Flutter

Mobile App Development

React Native

Scrum

Web Development

Front-End Development

Full-Stack Development

Expert

5.0/5
(3 jobs)

Hi there, I am a master of Computer science and I have over 6+ years of web experience. During this time I have built over 30+ websites from simple landing to complex SPA and e-commerce sites with $5M in revenue per year. My central technology stack: -HTML5/CSS3/SCSS, Material-Ui/Bootstrap/Tailwind, JavaScript-TypeScript, React Native/ React (Next.js) & Redux, Gatsby, Vue.js Tiptap Editor, Node.js, PHP, SQL, MySQL, Laravel for applications. for modern application -Jest for testing and Git as a control version. I am always online and ready to solve your problem when needed! Kind regards, Hovo

Blockchain

React Native

Web3

MySQL

SQL

Node.js

Gatsby.js

TypeScript

JavaScript

Material UI

Tailwind CSS

Git

CSS 3

Next.js

React

0.0/5
(0 jobs)

Greetings all, I represent an award-winning company called LITSLINK. We are a product-oriented development team (which consists of 250+ highly qualified software engineers, UI/UX designers, business analysts, project architects, project managers, and QA engineers) experienced in almost all popular areas: ✅AI: Machine Learning, Computer Vision, Natural Language Processing, Big Data Analytics ✅No-code, Low-code: Bubble, WebFlow ✅Blockchain: Solidity, Rust, Solana/Near blockchains, smart contracts ✅Cross-Platform Mobile development React Native, Flutter ✅Web development: Front-end (React.JS, Vue.JS, Angular.JS); Back-end (Node.JS, Java, Python) ✅AR/VR: Untiy3D/C#, Hololens, Hololens 2, GearVR, MS Mixed Reality, Oculus, HTC Vive, iOS/Android (AIRKit, ARCore) We provide smart and fast solutions on time and on budget. By hiring us, you are getting the expertise of our software architect board and the whole team's knowledge. Whether you need a single developer or a whole team, we are here to help.

Blockchain

Flutter

Ruby

OpenAI API

React

Python

Node.js

Mobile App Development

UX & UI

Machine Learning

Back-End Development

Front-End Development

Full-Stack Development

Web Development

Web Application

5.0/5
(27 jobs)

Very enthusiastic about blockchain/web3/cryptocurrencies as a user and ready to try my skills on technology development as well. Gained PHP/MySQL experience starting from 2011 made me more specialized in PHP frameworks such as Yii (1.x, 2.x), Laravel (5.x), CI, Kohana. And my last 2 years I worked mostly as Yii and Laravel backend developer (Rest-full API). I am familiar with JavaScript, NodeJs(Express/Socket io), NoSQL(MongoDB), HTML5, CSS3, but beside it, I have experience with client-side frameworks and libraries such as AngularJS, jQuery, Bootstrap, SASS, and LESS, etc. Other technologies I have used on different projects - PostgreSQL, Twilo, Twig, AWS, GoogleCloud, VueJS, FFmpeg, Stipe, Paypal, 2checkout, Omnipay, OneSignal, Redis, PHPExcel/PHPSpreadsheet, MailGun, Agile/Scrum and many many many more :)

Blockchain

Cryptocurrency

Yii2

MySQL Programming

Yii

Laravel

PHP

JavaScript

jQuery

5.0/5
(2 jobs)

Hi! I'm Lusine — a senior full stack & blockchain developer with 8+ years of experience building scalable, secure, and real-time applications. My stack combines powerful backend engineering (Node.js, TypeScript) and decentralized systems (Solidity, Hardhat). 🛠️ My key strengths: - Smart contract development (Solidity, ERC-20/721/1155, staking systems) - Backend architecture with Node.js (Express, NestJS) - Databases: Firebase, MongoDB, PostgreSQL, MySQL - Caching & queues: Redis, RabbitMQ, Apache Kafka - Real-time apps: WebSockets, Telegram bots (Telegraf.js) - AI integration (OpenAI, GPT APIs) - API design, authentication, role-based access, CI/CD pipelines I don’t just write code — I build reliable systems with maintainable structure, tests, and documentation. If you need someone who understands both Web2 and Web3 deeply — let’s talk. I’m here to help bring your idea into reality.

Blockchain

GPT-4o

PHP

Hardhat

App Development

RabbitMQ

Google Chrome Extension

Redis

Web3

MongoDB

AI Chatbot

PostgreSQL

React

Node.js

Solidity

4.6/5
(19 jobs)

Expert C++ engineer with good background on algorithms. PHD in Cryptography, experience with blockchain, working part time as ZCoin team member. Worked at Google Zurich. Experience with database indexing and distributed systems. Winner of several international programming contest including 2 bronze medals at IOI. Good knowledge of system design, OOD, ability to write readable code with good structure. Looking for performance-critical applications.

Blockchain

Data Structures

Algorithm Development

Cryptography

Database Programming

Unix Shell

C#

C++

5.0/5
(46 jobs)

July 2021 - February 2022 and November 2020 - Present Time: Upwork freelancer. 2022-Present Time: Web, API and database developer in BR1Infinite team. 2010-2020: CTO and Database Architect in medical ensurance company: - Develop and support company database infrastructure from the ground with MS SQL Server (later moving pieces in Postgresql and Oracle) - ETL from different sources (reverse enginnering for sources without api) - Creating algoritms for data analysis in medical ensurance scope (bussines logic inside database) - Develop full software package for employees - Extending SQL Server functionality with CLR, Postgresql with Python Can operate in different database systems (SQL Server, Oracle, Postgresql), learnability to new technologies. Can use different programming languages like Go, Python, Lua, C#, JavaScript, HTML/CSS layout (rest api, spa interfaces) Investing some time in learning game development techniques with Godot, Defold engines and related areas like Blender.

Blockchain

Python

CSS 3

Database Programming

HTML5

JavaScript

Database Development

Web Development

WebRTC

API Development

Database Modeling

React

Vue.js

Golang

Game Development

Web Service

SQL

4.6/5
(46 jobs)

I'm a professional web software engineer with ten years of experience, highly focused on the cryptocurrency and blockchain sphere. I have experience developing blockchain-based dApps, familiar with Solidity, Web3.js, Metamask, etc. Familiar with DeFi, ERC20, ERC721, ERC777, TRC20, staking, burning mining tokens. Regarding web development, my main development frameworks are Express.js (Node.js) and Laravel (PHP) on the backend, Nuxt.js/Vue.js on the frontend, I also have strong knowledge of Next.js/React. I am proficient in Linux system administration, MySQL, MongoDB. Looking forward to cooperating with you!

Blockchain

NFT

DApps

TRON

Cryptocurrency

Solidity

Smart Contract

web3.js

JavaScript

Vue.js

Node.js

5.0/5
(4 jobs)

🌟 Experienced Full Stack Developer | 8+ Years of Excellence in Web & Mobile Solutions I specialize in crafting high-quality, scalable, and innovative solutions with a focus on clear communication and timely delivery. My expertise spans across cutting-edge technologies, from front-end and back-end development to blockchain and AI integrations. 💼 Core Competencies Back-End Development: Laravel, Node.js, Python Front-End Development: Vue.js, React.js, Next.js 🚀 Unique Offerings TG bots & mini-apps CRM and SaaS MVP development Browser extensions & payment gateway integration Database & DevOps expertise (AWS, Docker, Firebase) 🏆 Why Choose Me? ✅ Proven track record of delivering exceptional results ✅ Flexible scheduling and responsive communication ✅ Strong attention to detail and analytical problem-solving Let’s collaborate to turn your vision into a robust, scalable, and user-friendly solution. Contact me today to get started!

Blockchain

React Native

TypeScript

Solidity

MongoDB

MySQL

Next.js

Laravel

Node.js

React

Vue.js

Web3

Python

PHP

JavaScript

3.7/5
(24 jobs)

I'm a DeFi-focused Solidity and MERN developer. 1. Building Custom DApp sand smart contracts in the DeFi sector 2. Providing Decentralised Trading, Aggregating, Analytic, and Asset Management ready-to-go solutions. 3. Web3 Asset Management Fund (Hedge Fund) complete setup - Consulting, Integrations, Fund Website Whitelabel, promotion in Asset Manager's marketplaces.. 4. On-chain trading automation & dashboards (not FlashLoan bots). Drop me a line if interested! Solutions I provide: ✔ DEX, Centralized Crypto Exchange and Hybrid Exchanges ✔ Advanced Trading Platform (Stocks, CFD, Forex, Option, Features...) ✔ Portfolio Tracking Platform ✔ Multichain Web and Mobile Wallet ✔ Crypto Betting and Casino ✔ Yield Farming Protocols ✔ Liquidity Mining Protocols ✔ Private / Public sale smart contract ✔ Automated Market Making (AMM) protocols ✔ Flash Loans, Trading Bots, Liquidity Bot, Arbitrage Bots, Front run bots ✔ Impermanent loss, governance tokens, synthetic token ✔ P2P/Pool Lending and Borrowing ✔ Crypto Collectible Platforms and Non-Fungible Tokens ✔ Custom dApps, Smart contracrs, Tokens ✔ ERC20, ERC777, ERC223, ERC721, ERC1155 Smart Contract Development ✔ Gas-efficient token contracts ✔ ICO, STO, Blockchain Copyrighting and Whitepapers ✔ Token Design - Stabilcoins, Utility, Security, Investment, Dividend coins, Tokenomics ✔ NFT Marketplace, NFT Staking Platform, NFT Wallets, NFT Minting dapps ✔ API Development and Integration: blockchain.info, infura.io, poloniex.com, bitfinex.com, hitbtc.com, coinbase.com, kraken.com, cex.io, coinmarketcap.com, cryptokitties.co, uniswap.org, aave.com, yearn.finance, sushiswap.org ✔ Platforms: Ethereum, Binance Smart Chain (BSC), Solana, Huobi ECO Chain (Heco), Polygon (Matic), Fantom, Egem, Avalanche, Hyperledger, TomoChain, or any EVM compatible platform. ✔ DeFi development: Yearn, Uniswap (V4), Curve, Olympus DAO, Balancer, Synthetic, Compound, Aave, Mooniswap, Fulcrum, dYdX, SushiSwap, Zapper, Maker, insstaDApp, Bancor, Loopring, Polkadot, Substrate, WBTC, RenVM, DDorce, mStable, Alchemy, Binance Launchpool (BellaProtocol), MLM, NFT, BakerySwap, Pickle, Fortube, PerlinX, UMA Project, YFV, YFII, Synthetix, dForce, Swerve, Zoom Protocol, Pancake Swap. ✔Bots: The fastest buyers and sellers upon any trigger. The bots can operate on CEX or DEX. ✔ Fast DeFi Clone: forks of uniswap, quickswap, pankcakeswap, sushiswap, moonswap, bakeryswap, apeswap, pantherswap, Olympus dao, 1inch, and more. ✔ Blockchain stack : Web3, Solidity, Infura, Hardhat, Truffle, OpenZeppelin, MIST/Remix, BTC, ETH, TRON, USDT, YFI, Bel, Solana, Polygon (Matic), BSC ✔ Wallets and Clients: MEW, Geth, Parity, Gemini Mist, Metamask, Ganache, Trust Wallet ✔ APIs we work with: KuCoin, Bittrex, Bittrex Global, Coinbase Pro, Binance, Kraken, Poloniex, Huobi, Gemini, Bibox, BitMart, Huobi Global, HitBTC, OKEX, Bitstamp. ✔ Uniswap V4 Hooks. Web Stack: ✔ Web3.js, Ethereum, Solidity, Truffle, Hardhat, Polygon, BSC, Foundry ✔ JavaScript/ Typescript, Vue.js, React.js, Node.js ✔ MySQL, MongoDB, Redis ✔ TDD methodology (Unit-testing) Have Turnkey and Whitelabel solutions for your fast start. Can provide dedicated teams for constant product growth. Just drop me a line!

Blockchain

Vue.js

React

Truffle

DApps

Binance Coin

Bitcoin

Cryptocurrency

Solana

web3.js

Solidity

Blockchain Development

Ethereum

Smart Contract

4.5/5
(13 jobs)

With a lifelong dedication to the software industry and web development, particularly in React, Next, DeFi, dApp, frontend and blockchain technologies, I bring over seven years of hands-on experience as a developer. Throughout my career, I have successfully delivered a multitude of projects ranging from decentralized exchanges (Dex) and lending platforms to yield farming protocols and non-fungible token (NFT) marketplaces. My expertise spans a wide spectrum, encompassing Smart Contract development using Solidity, JavaScript frameworks, and Python. I have a proven track record of crafting high-quality, reliable solutions that meet the needs of businesses and users alike. Whether it's backend development utilizing Node.js and Python, or establishing seamless frontend-backend communication through Restful APIs, I ensure that every aspect of the project is meticulously executed. In terms of frontend development, I excel in HTML, CSS, and JavaScript, leveraging modern frameworks such as React with Redux-Toolkit, Vue.js, Next.js, and Angular to deliver immersive user experiences. My proficiency extends to converting designs from Figma to HTML/CSS, implementing animations using GSAP, Animate.js, and CSS keyframes, and ensuring cross-browser compatibility and responsiveness across various devices and resolutions. Furthermore, I am well-versed in version control systems like Git, and proficient in project management tools such as Slack and Trello. My strong communication skills and client-centric approach have earned me numerous accolades on freelance platforms like Upwork, Freelancehunt, and Weblancer. I am committed to delivering exceptional results and contributing to the success of your projects and business endeavors.

Blockchain

Angular

React

Cryptocurrency

web3.js

Blockchain Development

DApp Development

Smart Contract

Node.js

Solidity

NFT

JavaScript

TypeScript

Python

0.0/5
(0 jobs)

I am a blockchain and smart contract developer, writing smart contracts, creating cryptocurrencies, and launching ICOs, with about 6 years of experience with solidity and smart contract development in the ethereum blockchain ecosystem. My expertise: - Writing smart contract logic code for pretty much anything you can think of. - Decentralized cryptocurrency exchange (DEX) - Front Running / Back-running Bots - DEX based trading bots for cryptocurrency - Binance smart chain development - Smart contract Audit - NFT, IPFS, ERC721, ERC1155 development - Token & Coin development - Staking, yield farming, lottery, prediction smart contracts

Blockchain

Binance Coin

Ethereum

Cryptocurrency

NFT

Solana

Solidity

web3.js

C

C++

Python

React

Node.js

Rust

Next.js

0.0/5
(0 jobs)

Starting from middle of 2016 began proactively working on blockchain related projects as a Blockchain software engineer. My experiences range from creating both front-end blockchain applications to backend architecture design and implementation, smart contract development, testing, auditing and development for Fintech and other industries that need the power of decentralization, tokenization, and smart contracts. Expertise in Public Blockchain Platforms: Ethereum | Solana | Binance Smart Chain ✓ Developing smart contracts by Solidity and Rust programming languages. ✓ Deploying solana rust programs using anchor framework and vernila rust. ✓ Developing RPC using client libraries such as Web3js. ✓ Static analysis of smart contracts for gas consumption and optimization using Remix IDE. ✓ Securing smart contracts using libraries like OpenZeppelin. ✓ Developing Ethereum dApps using Truffle framework. ✓ Integration with crypto wallets such as Metamask & Phantom. ✓ Deploying smart contracts on test networks such as ropsten/rinkeby as well as ethereum/solana mainnet. ✓ Developing nft minting site and defi for nft staking and breeding ✓ Deploying spl-token and smart contracts for token staking, lending and borrowing and farming. Expertise in Private & Consortium Blockchain Platforms Hyperledger Fabric ✓ Developing Chaincode using the Go programming language. ✓ Developing proof of concepts using Hyperledger Composer. ✓ Integration with Fabric Java SDK. ✓ Creating RESTful APIs for client applications to communicate with the blockchain network. ✓ Creating channels, orderers, and peers. ✓ Deployment and instantiation of Chaincode on channels on cloud services like IBM Bluemix and Amazon AWS. I hold expertise with: - Solidity / Rust / Golang - React.js / Express.js / Vue.js / Next.js / Angular.js / Redux /Node.js - Laravel - MySQL / MongoDB / PostgreSQL / MSSQL - Heroku / VPS / Amazon Web Services (AWS) / Digital Ocean - Github, Gitlab, Bitbucket, Trello, Backlog, etc. Here are the applications that I've built so far. - Dapp, DeFi development - NFT game/marketplace development on Ethereum & Solana blockchains in Solidity & Rust - Ethereum & Binance Smart Chain token development on ERC20, ERC721, ERC1155, BEP20, BEP721 & BEP1155 protocols - ICO / ITO / IDO / STO, Cryptocurrency exchange & Cryptocurrency wallet Development Further Expertise & Work Deliverables in Blockchain: ✓ DApp for Supply Chain Management for Food Industry ✓ DApp implementation in Philanthropy ✓ DApp for Anti-Counterfeiting in the Pharmaceutical Industry ✓ Worked on Protocols like Ethereum, IBM Hyperledger, Stellar ✓ SetUp of a Permission-based Consortium Network ✓ Implementation of Private, Public and Permission-based network Thanks.

Blockchain

Crypto Exchange Platform

Polkadot

Cardano

Ethereum

Web3

Cryptocurrency

Decentralized Exchange

Solana

Smart Contract

Algorand

DApp Development

Crypto Wallet Development

Rust

Solidity

0.0/5
(0 jobs)

I’m an experienced Off-Page SEO Specialist with over 2 years of hands-on experience helping SaaS and digital brands boost their organic visibility through strategic link building, anchor text optimization, and outreach campaigns. My work is focused on delivering measurable SEO growth while building long-term partnerships that support brand authority. What I do best: • Link Building & Backlink Strategy – I acquire high-quality, relevant backlinks through guest posting, link insertions, and strategic partnerships. • Cold Outreach & Negotiation – I manage end-to-end outreach, from prospecting and crafting compelling emails to closing deals within budget. • Anchor Text Optimization – I ensure that anchor texts are optimized for search intent and aligned with the client’s keyword strategy. • SEO Tools & Research – Skilled in using tools like Ahrefs, Google Sheets, and custom automation for keyword research and performance tracking. I’m detail-oriented, results-driven, and easy to collaborate with. Whether you’re looking for someone to help build authority backlinks or manage your off-page SEO workflow, I’m here to help your website grow.

Blockchain

Cold Email

Off-Page SEO

Guest Post

Price & Quote Negotiation

Partnership & Collaborations Outreach

Email Outreach

Digital Marketing

0.0/5
(0 jobs)

Results-oriented quality assurance tester with 2+ years of expertise in the field of Manual Testing. Strong knowledge of SDLC and QA testing processes. Experienced in testing web-based and mobile applications. Highly communicative and experienced in requirements analysis and management. ⭐ My skills include the following but are not limited to • Well versed with various types of Black Box Testing, Functional testing, Retesting, Regression testing, Compatibility testing, Smoke testing • Test case design on TestRail,Testlink,Google Sheet and Test Execution • Sound knowledge of testing mobile application (Android and iOS) • Effective bug reporting via tool JIRA, Trello, Linear • Sound knowledge of test artifacts (Bug reports, Test cases, Test suites, Test Plans) • Worked in Agile Scrum\Kanban methodologies • API testing: Postman, Swagger • Created User Manuals, web content and several articles

Blockchain

User Manual

Quality Assurance

Test Case Design

Manual Testing

API Testing

Functional Testing

Web Testing

Regression Testing

Mobile App Testing

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