Hire the best Cryptographers

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Clients rate Cryptographers
Rating is 4.8 out of 5.
4.8/5
based on 391 client reviews
  • $150 hourly
    I am a cybersecurity professional with a Master's Degree in Cyber Operations and two years of work experience in cybersecurity research and development at a world-class R&D laboratory. In that job, I gained experience in network traffic analysis, malware analysis, and cryptography. For over two years, I have worked as a freelancer, providing consulting, content development, and course creation in cybersecurity and blockchain security. I specialize in development of technical content (blogs, whitepapers, case studies, and courseware) in the field of cybersecurity. I currently hold the Certified Ethical Hacker and Certified Blockchain Security Professional certifications.
    vsuc_fltilesrefresh_TrophyIcon Cryptography
    Information Security
    Cryptocurrency
    Blockchain
    Malware
    Reverse Engineering
  • $35 hourly
    Expert in Blockchain and Cryptocurrency (end to end solutions) and DLT (Distributed Ledger Technology). I have great experience in Blockchain Development including building architecture, developing Smart contracts, wallets, exchanges, DAPP solutions. I have been into all kinds of blockchain projects like Smart contract, Wallet creation, Token creation, Integrating the wallet, website and app creation, whitepaper creation and building crypto exchange/trading platform for Bitcoin and other Cryptocurrencies such as Dash, Ethereum, and Litecoin, etc. I can help you with the development of the pilot version of the Peatio crypto open-source exchange. I can help you in setting up the trading pairs ERC 20, ETH, Bitcoin, and 2 ERC20 tokens, FIAT currency with good UI/UX experience along with high encryption and Setting up crypto-currency custodian system using the principle of multi-tier wallet management with Hot, Warm and Cold wallets. Blockchain Development majorly performs by JavaScript, .net core with Linux deployment because reverse engineering is not possible but some solutions are only possible with JavaScript framework, C and C++ and Golang and we achieved 50000 per second. As a business specialist, my primary focus is on the growth of my partner and customer with the latest technology and the latest techniques. Even I have worked with international Government companies in the US Blockchain domain. Secondary focus is to make “Revinfotech” People leaders in Blockchain, Cryptocurrency, ICO, IOT, UI/UX, cloud, web and mobile, machine learning to brand equity using offline to online strategies. With the help of premiere markets research companies like Nielsen, McKinsey, and IPSOS. Even I setup brand regionally to national to international. My team did more than 30+ Blockchain Projects till now and one of my projects is generating 10000 Ethereum in one month I have hands-on experience in bootstrapping and successfully operating a startup. During the last couple of years, he has witnessed and mastered all phases of the business venture life cycle including conceptualization, leadership, resource management, business development, and expansion. With an experience which includes managing, producing and overseeing digital applications, I have gathered and built upon the expertise and consumer value in the internet and mobile space.
    vsuc_fltilesrefresh_TrophyIcon Cryptography
    Bitcoin
    Ethereum
    DApps
    Hyperledger Fabric
    Blockchain Architecture
    Blockchain
    JavaScript
    Blockchain Development
    Solidity
    Prototyping
    Smart Contract
    C++
  • $30 hourly
    I hold a degree in Informatics and Computing, and have been a Freelancer for over a decade. Please review one of the dedicated profiles for additional information. ✅ "Đorđe is skilled at what he does! He is well organized, well versed and worked timely on my project with utilization of constructive feedback along the way. He was polite, patient and executed his work with complete satisfaction. He revised his work and uploaded it once I was completely satisfied with his final result. I highly recommend him and will work with him again!" ✅ "Đorđe did an amazing job on this project. He went above and beyond and built a better application than the requirements he was given. Very impressed with his work. Highly recommend and will definitely work with again in the future." ✅ "Đorđe has been a pleasure to work with on this project. He has been very informative with the project development and produced a great product for our team. When the script wasn't working the way that I envisioned he was able to change it quickly and with no fuss. I can't wait to work with Đorđe again!"
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    Circuit Design
    GNU Octave
    KiCad
    HTML
    Network Security
    Digital Electronics
    CSS
    PCB Design
    Freecad
    Analog Electronics
    MySQL
    MATLAB
    JavaScript
    PHP
  • $100 hourly
    Hello, If you are looking for optimized solutions, to use in your projects, as key parts of a huge solution, please contact me. Never build a project using low level (self implemented - code without doing necessary tests ) parts for your projects, which may lead to fail. Take care !
    vsuc_fltilesrefresh_TrophyIcon Cryptography
    Unreal Engine
    Application Security
    Blockchain Development
    Blockchain
    Smart Contract
    Encryption
    iOS Development
    Cryptocurrency
    Web Application
    MongoDB
    C++
    Node.js
    SQLite
    TypeScript
  • $50 hourly
    I have over eight years of research and academic experience with a master of technology degree in communication engineering. My research experience is in Network Security, Machine learning, Signal Processing, Brain-Computer Interface (BCI), and Neurophysiology. Further, I have published my research work in many peer-reviewed international journals and conferences. In short, I am a technology enthusiast with a passion for research and creative writing.
    vsuc_fltilesrefresh_TrophyIcon Cryptography
    Research Papers
    Search Engine Optimization
    SEO Writing
    Proofreading
    Blog Writing
    Creative Writing
    Content Writing
    Academic Research
    Python
    Machine Learning
    MATLAB
  • $60 hourly
    I'm a full stack developer and know how to run a business. You need only describe a high-level overview of requirements without detailed specifications to get what you need. I often fix things other developers have been unable to solve. I've created information security systems and worked with large financial & erp systems and small startups and created many applications. I am proficient in following web, mobile and desktop-based languages and tools: 1) HTML/CSS, HTML5/CSS3, Bootstrap and Responsive Design 2) JavaScript, JQuery, Typescript, Angular, Vue & React 3) ASP.NET & C#, ASP.net MVC, PHP, Node.js, Python 4) Expert in Wordpress, Drupal, Magento 5) SQL, Linq to SQL, PLSQL and T-SQL, MongoDB 6) SSO, SAML, Auth0, 0Auth, Integrated SSO using the SAML, 0Auth, SSO, SSO, SSO 7) Authentication via Office 365, Google, Facebook, Linked In and Twitter, etc. 8) Microsoft Visual Studio, Microsoft SQL Server Management Studio, and SVN, Git, Bitbucket 9) Expert in Business Process Modeling using BPMN & Bizagi Studio Customer satisfaction is my number one goal. Meeting the client’s needs and requirements, providing efficient and high-quality solutions are in my primary objectives. My aim is to provide world-class services for software and web development solutions. I can develop and customize any system, website or mobile application according to your requirements.
    vsuc_fltilesrefresh_TrophyIcon Cryptography
    HTML5
    Python
    PHP
    JavaScript
    React Native
    Node.js
    React
    CSS 3
    Google Calendar
    AngularJS
    Vue.js
    jQuery
    ASP.NET MVC
    Amazon Cognito
    D3.js
    C#
  • $160 hourly
    I am an expert quant developer (Python, Go-lang, C#, C++, Java, Solidity and R), with a solid background in software development, trading, cryptocurrencies and blockchain, machine learning, artificial intelligence, web scraping, physics, mathematics, engineering and research. I have worked on multiple coding and business start-up projects related to blockchains and crypto assets/coins, gaining experience covering blockchain, consensus algorithms, Hyperledger, bitcoind, geth, ethminer, ethash, ERC20 tokens, JSON RPC, transactions, testnets, on-chain atomic swaps, cryptocurrency mining, coin trading, exchanges (both centralized and decentralized), and 'cryptoecosystem' modelling. I run my own full nodes for BTC, ETH and ETC. I have contributed to multiple whitepapers, and been involved in several completed ICOs. I am experienced coding for traders and quants, and familiar with the mechanisms and workings of securities markets, exchanges and market data (both time & sales and full order book). I am experienced working with - and coding against - trading APIs and other common elements of the client/message server architectures typically seen in trading systems. I am experienced in the Python, C++, C#, and Java implementations of QuickFIX, the open source implementation of the FIX messaging protocol. I have experience in the development and maintenance of trading and charting platforms and scanners, and with implementing market data connections. I have worked on several robo-advisor projects. I am well versed in the concepts of probability, sampling, margins of error, confidence levels and statistical inference, and in their application to empirical finance, backtesting, digital signal processing, and time series analysis. I am an expert in systematic trading research, simulations, backtests, optimizations, and trading, and in the programming and use of Pandas, Numpy, Matplotlib, and R for empirical finance, financial modelling, and classification via machine learning (Supervised Learning - Perceptron, Decision Trees, Naive Bayes), and in the use of dask for distributed/larger-than-memory computation. I am experienced in the coding, theory and practice of Knowledge Based Artificial Intelligence (Cognitive Systems). I am an experienced Python backend developer familiar with the Flask and Django web-frameworks. Test Driven Development (TDD). Continuous Integration/Deployment. Bash. Git. AWS. Jenkins/Jenkinsfile. Docker/Dockerfile. Windows. Linux. WordPress. I am a member of the UpWork Private Talent Cloud, a subset of UpWork freelancers specially selected by UpWork and given access to a 'dark pool' of special projects. Also, I am relied on by UpWork to write and review questions for the UpWork Skills Tests in C#, C++, Python, Java and R. I have degrees in Physics (MA, University of Oxford) and Petroleum Engineering (MSc, Imperial College, London). My native language is English, although I also speak fluent Spanish. Please see the feedback for the 100+ projects I have completed on UpWork.
    vsuc_fltilesrefresh_TrophyIcon Cryptography
    Blockchain
    Bitcoin
    Ethereum
    QuickFIX
    NinjaTrader
    C++
    pandas
    Python
  • $20 hourly
    I am a Blockchain Developer/enthusiast providing Blockchain solutions to Startups and Enterprises. I review business models and help them adjust their businesses within the growing blockchain ecosystem. Blockchain consensus mechanism (POW,POS,DPOS,POC,POI), Ethereum, Bit_coin, EOS, smart contract, web3js, Node.js, eosjs, truffle framework, scatter, metamask, grin master, Rust, Solidity,c++, Java, Angular js,React JS,React Native,Redux ,hyperledger, master node. I'm actively participating in the development of Blockchain-based solutions for Different industries. Developing a DApp to democratize the global medical device industry. The platform will disintermediate the medical device and supplies ecosystems, Development of Smart Contracts, Real Estate Investments on Blockchain, Gambling/Lottery Game on Blockchain, Donation on Blockchain. My Technical Blockchain Development Expertise: Being a full-stack blockchain developer, I have decent expertise in Blockchain development and custom smart contract application development technologies: ✅ Server-Side Languages: PHP, Node JS ✅ Frameworks: Express Js, YII2, Laravel, CakePHP ✅ JavaScript Frameworks: Angular Js, Jquery. ✅ Smart contract language: Solidity ✅ Data Management: o RDBMS: MySQL 5.X, PostgreSQL, Amazon RDS o NoSQL: MongoDB. o Caching: Memcached, Redis o Searching: Solr, Lucene, Elasticsearch, Amazon CloudSearch ✅ Queue: ActiveMQ, Amazon SQS ✅ Server Technologies: Linux, Ubuntu ✅ Cloud Computing Platforms: Amazon Web Services ✅ Frontend Stack: o Languages: HTML5, CSS3, Sass, JavaScript o UI Frameworks: Bootstrap, jQuery UI o JavaScript Frameworks: React, Backbone.js, Angular 2 ✅ Third-Party APIs Integration: o Payment Gateway: PayPal, Stripe, Authorize.Net, Coinpayments.net o Social: Facebook, Twitter, Google+ o Geo-location: Google Maps, Bing Maps o File Storage: Dropbox, Google Drive Blockchain Development Services We Offer: Being a full-stack blockchain developer & solidity programmer and associated with an ISO certified blockchain development company, I develop rapid, error-free website & web applications to achieve an enterprise's functionality implementation and business logic with minimum complexities ✅ Custom Blockchain Development ✅ Smart Contracts Development ✅ dApps Development ✅ Crowdsale ✅ Hyperledger & Multichain Development ✅ Multichain/Supply Chain Development ✅ Custom Cryptocurrency Development ✅ Crypto App Development ✅ ICO Web Development ✅ POC Development ✅ Cryptocurrency Wallet and Exchange Applications ✅ Private Blockchain Development ✅ Blockchain Consulting ✅ Blockchain Testing ✅ Ongoing Blockchain Development Support and Maintenance ✅ Full-Stack Blockchain Development ✅ Full Time Dedicated Blockchain Developer ✅ Half Dedicated Blockchain Developer Hourly Basis How do we communicate and report? We always prefer to keep our work transparent, and for this reason, we like to be in touch with our valued clients on a daily, weekly & monthly basis. According to the requirement, we use many types of project management tools for the blockchain development project's communication. ⦿ Upwork Message Board ⦿ JIRA ⦿ Azure DevOps Server ⦿ Asana ⦿ Trello ⦿ Zoho Projects
    vsuc_fltilesrefresh_TrophyIcon Cryptography
    Smart Contract
    DeFi
    Blockchain
    Crypto Exchange Platform
    Hyperledger
    Ethereum
    Solidity
    Docker
    Node.js
    Golang
    Kubernetes
    React Native
    React
    JavaScript
  • $50 hourly
    PKI & Digital Signatures / E-Signature specialist, having 11+ years experience in developing enterprise applications involving PDF, XML and CMS based Digital signatures, X509 Digital Certificates & PKI domain. PKI & Digital Signature Experience ------------------------------------------- - Bouncy Castle, IAIK - CAdES, PAdES, XAdES - SAML, OpenID, OAuth, SSL Client - OCSP, SCVP, Timestamping, LTANs - PKCS#1, PKCS#10, PKCS#11, SCEP, EST - Digital Signatures (PDF, XML), E-Signature - Microsoft CA, ADSS Server, Dogtag PKI, OpenSSL - HSM (Utimaco, Gemalto), Smart Cards, Amazon Cloud HSM, Azure Key Vault - SingPass, S/Mime integrations Languages & Technologies ---------------------------------- - Rabbit MQ - iText, PDFBox - Java, C#, Python - MS-SQL Server, MySQL, DB2 - Hibernate, SQL, IIS, Tomcat - Struts, Spring Boot, JPA1&2, JDBC - Amazon Web services, Amazon S3, Amazon SQS - JBOSS, Websphere, IBM LDAP, ITIM, TAM
    vsuc_fltilesrefresh_TrophyIcon Cryptography
    Amazon Plugin
    Microsoft Azure
    Web Development
    API
    SSL
    Apache PDFBox
    Document Analysis
    iText
    Cloud Security
    Microsoft IIS
    Apache Tomcat
    Spring Boot
    Core Java
    Website Security
    SOAP
  • $999 hourly
    Computer Science Engineer/Ethical Hacker/Cyber Security Expert who has been providing security for corporate and individuals. ✌Cyber Security/Ethical Hacking - Securing mobile & Pc, running tests for vulnerabilities & server-side security (11+ experience) ✌Web development - JavaScript , Php (10+ experience) ✌App development - java , Cross-platform (7+ experience) ✌App/ Backend Development: Golang, Clojure, Scala, Ruby on Rails (5+ Experience) ✌CMS - Joomla, WordPress, Drupal (8+ experience) ✌Databases/Caches: Postgres, Redis I usually develop cross-platform and Android apps and build dynamic websites. I can develop the product very quickly and with high accuracy. I believe in customer satisfaction. U say it I develop it any language any software you need and if you want to secure your self from attacks I am always available. My work is fast and secure. *Price will vary on the complexity of the project Happy new year 2023 !!!
    vsuc_fltilesrefresh_TrophyIcon Cryptography
    Information Security
    Security Engineering
    Ripple
    Bitcoin
    Internet Security
    Android App Development
    XML
    Ethical Hacking
    Cryptocurrency
    Digital Marketing
    PHP
    JavaScript
  • $150 hourly
    Summary Topnotch IT professional with HUGE experience in different IT areas: - Software development: More than two decades of experience, many large-scale projects, in Golang, C#/.NET, C/C++, Python, MATLAB, JavaScript, etc. - Specialized in performance-must industries where microseconds count, especially trading. I was working for two of the biggest trading companies in the world: "QuantRes" from Bahamas and "Jump Trading". - Blockchain and crypto: Huge experience in crypto-trading software and blockchain intergration. - DevOps: Planning and deploying efficient development workflows and CI/CD pipelines. - Containerization: HUGE experience with Docker and Kubernetes, both AWS managed EKS and on-premise vanilla Kubernetes. - Public cloud: AWS certificated, planning, implementing and managing cost-effective cloud deployments, tailored for specific client's needs. - Private cloud: Ten years of experience in planning, deploying and maintaining virtual infrastructures based on VMware and Hyper-V. - Hybrid cloud: Maintaining complex private+public cloud infrastructures. - System administration: Combined Linux/Windows environments, networking, monitoring, centralized configuration management, etc. Unique combination of experience and knowledge in many different IT areas makes me an ULTIMATE IT PROBLEM SOLVER. I can solve a problem no matter if it's caused by software bug, networking, DB load, firewalls, or simply bad karma. Certificates - Microsoft: MCP, MCAD - AWS Certified Developer - Associate (DVA-C01) - AWS Certified Solutions Architect - Associate (SAA-C01) - Certified Solidity Developer (CSD) - Certified Smart Contract Developer (CSCD) - Certified NFT Developer - Certified Polygon Developer DevOps Skills Besides DevOps skills mentioned above in AWS section, I also need to mention: - GitHub, Bitbucket; - Other Atlassian products (JIRA, Confluence, FishEye, Bitbucket, etc.); - Code quality tools like SonarQube; - Automated build tools like AppVeyor, Jenkins; - And much more. Software Development Skills - Strong software architecture skills. Planned many large-scale projects from scratch (selecting the appropriate architecture, databases, technology, patterns and practices, integrating third-party packages, etc.). - Programming languages: Golang (5 years of experience), C#/.NET (20 years of experience), MCAD in .NET from 2004; C/C++ on different platforms (Windows, Linux, OS X), with different compilers (Visual C++, GCC, Intel, Clang), Qt framework, C++/WinRT, for UWP; Other languages: Python, MATLAB, JavaScript, etc. I can quickly adopt any other language if needed. - Databases: MS SQL Server and PostgreSQL in RDBMS world; Cassandra, ScyllaDB, Elasticsearch and AWS DynamoDB in NoSQL world, KairosDB, OpenTSDB, InfluxDB in time-series DB systems. I can quickly adopt any other database. I'm able to suggest, plan, deploy and utilize the most appropriate DB system based on the client's needs. - Experience in architecting and developing large-scale distributed systems that are running on multiple servers, exchanging hundreds of thousands of messages per second, with real-time processing, with huge ingestion rates (dozens of thousands of data points per second). - Developing for micro-service architecture, Docker and Kubernetes. Also for modern "serverless" environments in the cloud. - Performance-first development for trading and system applications. Solution Architecture Skills Huge experience in software architecture, combined with huge infrastructure engineering experience (public, private, hybrid clouds), makes e a perfect Solution Architect. SysOps Skills - On-Premise virtualization based on VMware and Hyper-V; - System administration in combined (Win/Lin) environments; - Networking (private networks, DMZ, firewalls, routers, VPN connections with remote offices, VLANs, subnets, etc.). - Advanced monitoring with Zabbix and similar tools; - Centralized configuration management with Puppet or Ansible. Blockchain-specific development skills - Solidity smart contracts developer, following security and other best practices. - Using well-known third-party contracts and libraries like OpenZeppelin. - Using off-chain oracles like Chainlink. - Deploying ERC-20 tokens, initial coin offerings (ICO), ERC-721 and ERC-1155 non-fungible tokens (NFT). - Experience with Ethereum and Polygon blockchains, able to adapt to any other. - Unit testing and deployment automation by using tools like Truffle suite and Ganache. I can also adapt to Python tools like `brownie`. - Integrating smart contracts to development / production workflows by using Web3.js. Looking forward to hearing from you!
    vsuc_fltilesrefresh_TrophyIcon Cryptography
    Ethereum
    Solidity
    Linux System Administration
    .NET Framework
    Apache Cassandra
    AWS Lambda
    C++
    Golang
    C#
    Cloud Computing
  • $30 hourly
    fast learner, experienced programmer, physics lover, problem solver and someone who want to do good in the world
    vsuc_fltilesrefresh_TrophyIcon Cryptography
    Machine Learning
    Statistical Computing
    Statistical Analysis
    API Framework
    PHP
    Scripting
    Elliptic Curve Cryptography
    Mathematica
    C++
    C#
    Flutter
    Java
    Data Mining
    Python
  • $60 hourly
    github.com/SimRunBot Technologies I use: * Nextjs, React * Tailwind * Vercel * Stripe * Typescript/Javascript * Git
    vsuc_fltilesrefresh_TrophyIcon Cryptography
    SaaS Development
    Web Development
    ChatGPT
    Stable Diffusion
    React
    TypeScript
    NFT Minting
    Smart Contract
    Solidity
    JavaScript
    Blockchain
  • $65 hourly
    I hack web and desktop applications and develop patches while leading a team of security engineers to coordinate our technical strategy
    vsuc_fltilesrefresh_TrophyIcon Cryptography
    NodeJS Framework
    Node.js
    Content Writing
    Email Security
    Scripting
    Information Security Consultation
    Information Security
    Security Testing
    Linux
    Security Analysis
    Security Engineering
    JavaScript
    Python
  • $55 hourly
    Linux developer: from kernel drivers till own browsers, firmwares and linux distros! Creating software for people. github: repu1sion
    vsuc_fltilesrefresh_TrophyIcon Cryptography
    Driver Development
    OpenWrt
    Linux System Administration
    Android
    Linux
    Unix Shell
    Kernel
    Python
    C
    Embedded Linux
    C++
  • $60 hourly
    Expertise:- All kind of Math at undergrad level. Public key Cryptography, Zero knowledge proof (ZKP), Verifiable Computation, Attribute Encryption, Charm Crypto implementation and analysis, Homomorphic encryption (SEAL library), Designing protocols and implementation in python, PIR, theoretical security analysis. Qualification: BS-MS in Mathematics. PhD in the area of Mathematical Cryptography.
    vsuc_fltilesrefresh_TrophyIcon Cryptography
    Mathematics
    Elliptic Curve Cryptography
    Encryption
    Information Security
    C++
    Calculus
    Teaching Algebra
    Mathematics Tutoring
    Proofreading
  • $40 hourly
    Welcome! 👋 I'm delighted to connect with you. I bring over 9 years of expertise as a seasoned Full Stack Developer, specializing in Blockchain and Web3 development. 🚀 Are you ready to elevate your web, mobile, or Blockchain projects to new heights? Here's what I bring to the table: 🛠️ Technical Skills: ============================================================================ Web: ReactJS, Angular, Next.js, Node.js, Express.js, Django, Laravel, CSS 3, HTML 5, Tailwind CSS. Mobile: React Native. Database: MySQL, MSSQL. API: Restful APIs. E-commerce: WordPress, WooCommerce, Shopify. Other: Vue.js, Nuxt.js, TypeScript, CodeIgniter, MongoDB, Ruby on Rails. DevOps: MEAN Stack, .NET Core, .NET Framework. Blockchain: Smart Contracts, Solidity, Ether.js, Web3.js, DApps. 💡 Challenges I Solve: ============================================================================ E-commerce Website Challenges Data Complexity Seamless Blockchain Integration Mobile App Development NopCommerce Untangling User-Friendly Interface Crafting 🌐 Why Choose Me: ============================================================================ 9+ years of expertise Blockchain development skills Client satisfaction focus Regular project updates Flexible availability Blockchain Development Services: ============================================================================ ERC-20, Solidity, Smart Contract development Blockchain-based services: Ethereum, EOS, Other coins Cryptocurrency & Arbitrage/Market Making Bot Development Wallet Integration: Electrum, Parity, Mist, Metamask, MyEtherWallet API Development: blockchain.info, poloniex.com, bitfinex.com, hitbtc.com, coinbase.com, kraken.com, cex.io Technology Experience: ============================================================================ Nodejs, Blockchain Development Stack Solidity, Parity, EOSIO, Trezor, Ledger, MetaMask/MIST/Remix, BTC, Electrum, ETH DApps (decentralized applications) ERC20 tokens development EOS Smart Contract development Distributed Ledger technology Code versioning tools: Git, Jira, Bitbucket, SVN Node JS & Python Scripting languages, REST/JSON API integration Agile and DevOps environment, Elliptic Curve Cryptography(ECC), P2P Networking. 👥 Previous Experience: ============================================================================ 50+ successful projects Worked with renowned clients Extensive Mobile and Decentralized app development 🤝 Let's Work Together: For web, mobile, or Blockchain projects, let's connect! I prioritize outstanding results and client satisfaction. Excited for a stable and long-term cooperation! 📬 Contact Me: Message me to discuss your project or schedule a consultation. Ready to contribute to your project's success! 🚀
    vsuc_fltilesrefresh_TrophyIcon Cryptography
    Amazon Web Services
    Bitcoin
    Ethereum
    Python
    iOS
    Node.js
    Flutter
    Blockchain
    AngularJS
    Mobile App Development
    Android App Development
    Ionic Framework
  • $40 hourly
    I have been working in the Crypto Currency domain for the last 4 years and have sound knowledge of Bitcoin, Ethereum, Polkadot blockchain, Defi, and NFT knowledge. I am working on 3 parallel Defi and NFT projects on in this domain, one being creating a lending and borrow platform by staking top 10 ERC20 AltCoin. A very ambitious and promising project where we have a governance mechanism and also a separate token for the voting rights. My specialization lies in Angular and NodeJS technologies, and I am also well-versed in coding in Solidity and RUST. I have written intelligent contracts and can develop Security Tokens as well. Last but not least, we are also working on the blockchain-based replica of traditional debt collection applications. I am looking forward to working with you.
    vsuc_fltilesrefresh_TrophyIcon Cryptography
    Initial Coin Offering
    Content Writing
    Ethereum
    DApps User Experience
    Graphic Design
    Blockchain Development
    Blockchain Architecture
    Cryptocurrency
    Bitcoin
    UX & UI
    Solidity
    Rust
  • $25 hourly
    Hello, I welcome all of you. I can help you with your tasks about cryptography and mathematics. I am working on some articles, and I do love doing research and learning new things, especially about coding and cryptography. I like to improve myself and while doing this, I am happy to help you with your tasks.
    vsuc_fltilesrefresh_TrophyIcon Cryptography
    Research Documentation
    Research Papers
    Algorithm Development
    Encryption
    Information Security
    Writing
    Microsoft Word
    LaTeX
    Microsoft Visual Studio
    C++
    Python
    Mathematics Tutoring
    Mathematics
  • $60 hourly
    🧪4yrs+ Experience 👨‍💻51+Jobs ✨ 4.9 Rating 🎯40+ Excellent Dapps "Asmit is not just a great developer, but also a great person. Always willing to adjust to the modification of the smart contract and he brings new ideas to our project. For sure, I will work with him in the future!" - Shankar 🏵️ USA "Excellent guy - friendly and reliable. He goes the extra mile to investigate when something doesn't go according to plan! Highly recommended." - Stef🏵️UK "Asmit did exactly what was asked and the delivery was on time. Very professional!" - Nicholas 🏵️Hongkong "Great Job! I am going to hire this developer again." - Kimberly 🏵️ UAE "Great listener. Great questions. Understood accurately what the purpose of the project entails." -Chantal 🏵️ Canada "Asmit did a great job. Several times he explained all the necessary steps to me via video call and even afterwards he recorded some videos for me. In addition, his time flexibility was great, as I could even reach him very late in the evening." - Daveed 🏵️ Germany "Great work! Fastly helped us to move our 10k images with metadata into a JSON file. Definitely, will work again in the future!" - Ka 🏵️ Indonesia As a senior blockchain engineer with 4+ years of experience, I've worked on a range of platforms and languages, including Solidity, Rust, and Scilla on creating full-stack Apps. 🛡️ I've developed smart contracts, DApps, and blockchain-based systems for various industries, including complex projects such as Wormhole Cross Bridge, NFT Marketplace, Trading Bot, Arbitrage Bot, and Multi Chain Architecture. 🤝 With excellent communication and collaboration skills, I deliver high-quality results on time and within budget. As a senior blockchain developer, I can help drive meaningful results for your organization through the use of blockchain technology. 🏆 Let me bring my skills and experience to your project and help drive success as a senior blockchain developer on Upwork.
    vsuc_fltilesrefresh_TrophyIcon Cryptography
    React
    Bot Development
    Solana
    Emerging Tech Consultation
    web3.js
    Blockchain Architecture
    Cryptocurrency
    Ethereum
    Solidity
    Blockchain
    NFT Minting
    DApp Development
    Node.js
    Smart Contract
  • $20 hourly
    Experienced Forensic Analyst and Incident Responder. Skilled in Digital Forensics, penetration testing , Python programming, Wordpress Malware Removal, Cryptography ,Cyber Security and Incident Response.
    vsuc_fltilesrefresh_TrophyIcon Cryptography
    Malware Removal
    Network Administration
    Network Monitoring
    Network Security
    WordPress Malware Removal
    Penetration Testing
    Malware Website
    Web Hosting
    Digital Forensics
    Network Analysis
    Virus Removal
    Tech & IT
    Security Analysis
    Web Application Security
    Python
  • $15 hourly
    My strengths are enthusiasm, patience, determination and honesty. My knowledge interests are in the field of Cryptography and Mathematic. I feel that my knowledge-based skills could be stronger, and I am constantly working to improve them.
    vsuc_fltilesrefresh_TrophyIcon Cryptography
    Calculus
    Equations
    Information Security
    LaTeX
    Mathematics
  • $50 hourly
    As a Financial Modeling and Proforma Expert, I have a deep understanding of finance and accounting principles, coupled with extensive experience in creating financial models and proformas. With my expertise, I can help your business make informed decisions and achieve its financial goals. My skills include building custom financial models and proformas, conducting financial analysis and forecasting, and performing due diligence. I am proficient in Excel and other financial modeling tools and have a proven track record of delivering high-quality work for my clients. I have worked with clients in a variety of industries, including healthcare, technology, and finance. My approach to each project is customized to the unique needs of the client, and I am committed to delivering accurate and insightful financial models that drive business success. If you are looking for a skilled Financial Modeling and Proforma Expert who can help you navigate complex financial decisions and achieve your business goals, I would love to work with you.
    vsuc_fltilesrefresh_TrophyIcon Cryptography
    Financial Analysis & Valuation
    Medical Billing & Coding
    Electrical Engineering
    Business Plan
    Cryptocurrency Mining
    Bitcoin
    Energy & Utilities
    Startup Consulting
    Business Analysis
    Financial Analysis
    Financial Projection
    Pitch Deck
    Microsoft Excel
    Real Estate Financial Model
    Financial Modeling
  • $25 hourly
    I can work on ReactJS, Redux, NextJS, Typescript, Tailwind CSS, MUI, HTML, CSS, Bootstrap, React Native, and NodeJS. I have prior experience in integrating Social Media APIs, Maps/Location Services APIs, Payment Gateway APIs, Authentication/User Management APIs, Communication, and Messaging APIs. Whether you need a responsive website, a dynamic web app, or a mobile solution, I'm here to deliver exceptional results. Contact me today to discuss your project and get started!
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    C++
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    COMMITTED TO LONG-TERM WORK RELATIONSHIPS AND QUALITY WORK 🏆 TOP RATED Wordpress and Shopify developer on UPWORK 👌 High Client Recommendations. 𝐂𝐨𝐦𝐩𝐥𝐞𝐭𝐞𝐝 12000+ 𝐡𝐫𝐬 | 𝐂𝐨𝐦𝐩𝐥𝐞𝐭𝐞𝐝 345 Projects 𝐬𝐮𝐜𝐜𝐞𝐬𝐬𝐟𝐮𝐥𝐥𝐲 I am Puneet Kaushal, specialised in web designing and development with more than 10 years of working experience. I have done Masters in Computer Science. Understanding the requirements with a complete idea of clients' imagination, doing the planning and making a strategy for making all imaginations to practical is my key skill of getting success. I am a hard and smart working guy. I have successfully completed more than 8800 hours on Upwork. I do design and Development for Web and Mobile applications using multiple skills mentioned below. Web Development skills: PHP, WordPress, Shopify, Shopify Plus, Squarespace, Webflow, Weebly, Hubspot, Django, Solidity, REACT, SAAS, Node.JS, Angular.JS, Laravel, Codeigniter, Opencart, 3rd Party API Integration. Web Designing Skills: PSD-HTML5 / Wordpress, Shopify, Shopify Plus, Illustrator, Unbounce, Click funnels, Wix, My responsibilities include: Design, build and maintain efficient, reusable, and reliable code Ensure the best possible performance, quality, and responsiveness of applications Identify bottlenecks and bugs, and devise solutions to mitigate and address these issues I have worked on these websites : Membership Websites Real Estate websites Payment Gateway integration E-commerce websites Online Stores EMR and Health Services Real Estate IDX and MLS integration Scheduling and Booking website SAAS and Business Analytics SAAS & Business Intelligence Dashboard and Reporting Social Networking Video Streaming and Conferencing CMS Certified WordPress Finance, Mortgage, Insurance I believe in communication to meet the customer's needs and expectations for a given job. I strive to be the only person you'll need for all your web needs. Let's work together and make your vision for a web or mobile the best it can be. I always work with Upwork Rules and Regulations for getting paid i.e on Hourly and Fixed Price Projects. My Availability Hours: EST, PST, CST, IST business hours. So let's discuss the project which you do have and make your imaginations practical. NOTE: You will see some open contracts, because my clients want to retain me for future assignments and long term support.
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How to Hire Top Cryptographers

How to hire cryptographers

Need help securing IT and computer systems through algorithms, ciphers, and encryption? Or are you trying to decrypt a secure file to access its contents? Cryptographers are here to help. 

So how do you hire cryptographers? What follows are some tips for finding top cryptography consultants on Upwork.

How to shortlist cryptography professionals

As you’re browsing available cryptography consultants, it can be helpful to develop a shortlist of the professionals you may want to interview. You can screen profiles on criteria such as:

  • Technology fit. You want a cryptographer who understands the technologies behind the IT or computer system you wish to encrypt or decrypt.
  • Project experience. Screen candidate profiles for specific skills and experience (e.g., securing blockchain transactions with cryptographic hash functions in your supply chain management system).
  • Feedback. Check reviews from past clients for glowing testimonials or red flags that can tell you what it’s like to work with a particular cryptographer.

How to write an effective cryptography job post

With a clear picture of your ideal cryptographer in mind, it’s time to write that job post. Although you don’t need a full job description as you would when hiring an employee, aim to provide enough detail for a contractor to know if they’re the right fit for the project.

Job post title

Create a simple title that describes exactly what you’re looking for. The idea is to target the keywords that your ideal candidate is likely to type into a job search bar to find your project. Here are some sample cryptographer job post titles:

  • Cybersecurity consultant experienced encrypting/decrypting files with AES
  • Seeking a blockchain cryptography expert to help implement a smart contract system with Hyperledger
  • Need an ethical hacker to decrypt IT systems infected by ransomware

It’s worth noting that you will rarely find freelancers branding themselves as cryptographers. Based on your cryptography needs, your title should be more specific and target the type of professional who is relevant to your job post. 

Cryptography project description

An effective cryptography job post should include: 

  • Scope of work: From recovering locked files to beefing up security with encryption, list all the deliverables you’ll need. 
  • Project length: Your job post should indicate whether this is a smaller or larger project. 
  • Background: If you prefer experience with certain industries, technologies, and cryptography specializations, mention this here. 
  • Budget: Set a budget and note your preference for hourly rates vs. fixed-price contracts.

Cryptographer responsibilities

Here are some examples of cryptographer job responsibilities:

  • Identify and patch weaknesses in existing cryptography-based security systems
  • Design and implement technology-specific encryption solutions (e.g., cryptographic hash functions for blockchain implementations)
  • Create a cybersecurity plan for following encryption/decryption best practices

Cryptographer requirements and qualifications

Be sure to include any requirements and qualifications you’re looking for in a cryptographer. Here are some examples:

  • Cryptography
  • Cybersecurity
  • Mathematical/statistical analysis
  • A working knowledge of algorithms, ciphers, and encryption technologies
  • Platform-specific experience with the computer and IT systems of your project (e.g., AWS cloud infrastructure)

Cryptographers FAQ

What is cryptography?

Cryptography is the study of information and communication security techniques. While the practice of securing communications through coded messages is nothing new, today’s cryptographers leverage computer science and mathematical concepts to encrypt and decrypt information. Cryptography plays a major role in securing communications between IT infrastructure, computer systems, and software. It’s also one of the foundational technologies behind blockchain, a distributed ledger system that secures its transactions through cryptographic hash functions.

How much does it cost to hire a cryptographer?

The first step to determining the cost to hire a cryptographer will be to define your needs. Rates can vary due to many factors, including expertise and experience, location, and market conditions.

Cost factor #1: project scope

The first variable to consider when determining scope is the nature of the work that needs to be completed. Not all cryptography projects are created equal. Setting up basic encryption keys to handle authentication within a mobile app will typically take less time than creating your cryptographic system for a new blockchain technology. 

Tip: The more accurately your job description describes the scope of your project, the easier it will be for talent to give you accurate cost estimates and proposals.

Cost factor #2: cryptography experience

Choosing the right level of expertise for the job is closely tied to how well you determined the scope of your project. You wouldn’t need an advanced cryptographer to leverage an existing blockchain technology such as Ethereum to set up a single smart contract. On the other hand, decrypting your company’s files after a ransomware attack will require an expert ethical hacker. 

Beyond experience level, you need to consider the type of experience the talent possesses. The following table breaks down the rates of the typical types of cryptographers you can find on Upwork.

Rates charged by cryptographers on Upwork

Types of Cryptographers

Description

Hourly Rate

Cybersecurity consultant 

Leverages ciphers, algorithms, and encryption solutions to secure communications between IT infrastructure, software, and devices.

$30-80+

Blockchain expert

Leverages cryptography to design and implement blockchain solutions such as cryptocurrencies, smart contracts, and smart supply chains. 

$40-80+

Ethical hacker

Leverages cryptography to decrypt files, recover lost data, or harden security systems through security testing. 

$60-90+


 

Cost factor #3: location

Location is another variable that can impact a cryptographer’s cost. It’s no secret that you can leverage differences in purchasing power between countries to gain savings on talent. But it’s also important to factor in hidden costs such as language barriers, time zones, and the logistics of managing a remote team. The real advantage to sourcing talent remotely on Upwork is the ability to scan a global talent pool for the best possible person for the job. Location is no longer an obstacle. 

Cost factor #4: independent contractor vs. agency

The final variable regarding talent cost is hiring an independent contractor vs. an agency. An agency is often a “one size fits all” model, so you’ll often have access to a designer, a project manager, an engineer, and more. When hiring individuals you have total autonomy regarding who is responsible for which part of the project, but you’ll need to source each of those skills separately.

The trade-off between hiring individuals vs. hiring an agency is the level of administrative overhead you incur personally in coordinating tasks among all members of the team. Project scope and personal preference will determine which style is a better fit for your needs.

Cryptography Tips and Best Practices

Encrypt sensitive information in transit

Sensitive data such as personally identifiable information (PII), transactions, and trade secrets should be safeguarded by encryption whenever possible. When information is in transit, such as through API gateways between apps via transport protocols (e.g., HTTP), an encryption protocol such as TLS (transport layer security) should be used. 

Consider end-to-end encryption (E2EE)

As important as it is to secure information in transit, it’s also important to consider mapping your entire encryption strategy to cover all points across an encryption path including the endpoints. 

Cryptographic keys used to encrypt messages and are stored exclusively at the endpoints. Normally a file can only be decrypted if it can obtain the public key of the other endpoint. However, it’s possible to perform a man-in-the-middle attack in which the decoding key is intercepted in transit to the other player. 

The solution is to use public and private keys to ensure two parties are able to exchange keys with each other without exposing the keys to malicious third parties. If you encrypt a message with your public key, only someone with a matching private key can decrypt it. 

The recipient shares their public key with you to allow you to send an encrypted message to them. This is done to identify both parties. There are many types of E2EE, each with its own weaknesses and strengths, using this concept of public and private key pairs to verify the identity of the other side of a transaction. 

Determine if decentralized E2EE is preferred

There are many aspects of business and industry that ultimately boil down to transactions in a ledger. Sometimes those transactions are financial; other times the transactions are the transfer of information between two parties. With the advent of the blockchain, security specialists have begun to explore its applications to encryption protocols. 

Conventional E2EE messaging apps rely on centralized systems to handle the identity validation of senders and receivers in encrypted transactions. The public key serves as the encryption key and is published to a trusted centralized authority to allow others to send encrypted messages to the owner of the public key. From the perspective of a sender, ownership of the public key is verified by this trusted centralized authority. The centralized authority is responsible for preventing a man in the middle from masquerading as the owner of the public key. But what happens if something about the nature of your data means you can’t trust a third-party centralized authority? 

You can use a blockchain, a distributed ledger technology (DLT), to ensure information transactions are validated for both senders and receivers. Combine DLT with encryption and you get a decentralized public key infrastructure (DPKI). Here’s how it works:

  • Digital signatures consist of two keys: a signing key (private key) and a verification key (public key).
  • Digital signatures for information transactions are recorded on a blockchain as pairs.
  • Anyone can write to the blockchain, which uses cryptography to make it computationally infeasible to alter. 
  • Since the blockchain of information transactions is immutable, and everyone has a copy of the blockchain, it becomes computationally infeasible to commit fraud.

In this way it’s possible to enhance the security of your encryption scheme by relying on the cryptography and transparency of a blockchain to add another layer of security to your encryption. 

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