Hi, I'm one of the🏆 Top Rated 🏆 and FAST Web Scraper and automation expert on UPWORK. I have over 4 years of experience in Data Scraping, Data Mining, Data extraction and I have a history of 200+ projects completed with positive feedback. I can scrape any website data and can export the results in any structured format like CSV, XLSX, JSON, Google Sheet, or any DB. My expertise includes: 👉 Data Scraping (Python/BeautifulSoup/Requests/LXML) 👉 Web Automation (Python/C#/Selenium) 👉 Android Automation (Python/C#/Appium) 👉 Android Apps (Java/XML) 👉 Windows desktop Apps (WPF/C#/XAML) 👉 Web Apps (MEAN Stack) 👉 API Development (FastAPI/Flask) 👉 Multithreaded code 👉 Output in JSON/CSV/Excel 👉 Clean and efficient 👉 Commented and prettified to help you understand 👉 Parsing data and APIs 👉 C++ 👉 Cyber security 👉 Web pentesting/hacking 👉 Reverse Engineering

I have Expert-Vetted Talent (EVT) badge - it's Upwork's top 1% freelancers — pre-screened by Upwork Talent Managers and experts in their field. Out of ~30 million programmers worldwide, only a few thousand know Algorithms & Data Structures better than I do, which is proven by programming competitions. Please, contact me if you need that skill level (top 0.01%). I can do algorithmic/performance work in C/C++, Python, SQL, Java, MQL4, MQL5, C#, Assembly, JavaScript, and probably other languages. I also work with AI, mostly in NLP and NLU: large language models including OpenAI GPT-3, Bloom, BloomZ, GPT-J 6B, LLaMA, Alpaca, etc.; HuggingFace Transformers, Accelerate; Petals, Deepspeed, zfp/zfpy; CUDA, CPU, and MPS (AArch 64 M2 MacOS Metal GPU) backends. I have some work experience with Apple Neural Engine (ANE). In AI, I also worked with XGBoost for predictions (including trading), LibSVM, TensorFlow, PyTorch, Scikit-learn, etc. I have the hardware in my home office for training and inference with large language models and other AI. English: C1 (Grammarly plugin says I use more unique words than 95% of other users, native speakers included). Polish: B1 (86%). Russian, Belarusian: Native. - With unique skills in Algorithms & Data Structures, I improve programs asymptotically (often 100 or more times on large input data). - 29 years of programming (started Basic and assembler on ZX Spectrum), 24 years of C/C++, 16 years of commercial work experience + 3 years of research projects. - Contributed to widely used Open Source projects: LLVM/Clang (my contribution is XRay profiler on ARM32 and AArch64 systems), Katana Graph (multiple small contributions mostly driven by the proprietary part where I do GPU/CUDA), CBMC "C Bounds Model Checking" (I contributed parallelized output of DIMACS formatted Boolean Satisfiability formula), oatpp (C++ web framework, I contributed bug-fixes), OWL (OptiX Wrapper Library, I contributed build fixes for Ubuntu), Galois (research project for distributed computations on graphs, I contributed GPU improvements) - Actively participated in bug reporting and reproduction (for NVIDIA CUDA, Cadical&kissat boolean satisfiability solver, JBOSS, MariaDB, Tensorflow, Linux, etc) - Led several open-source projects of my own: ProbQA (a video game recommendation system based on a high-performance Bayesian inference engine with CUDA, SIMD, and multi-threading); InSoAr (automatic reconstruction of software architecture from source code ), a multi-threaded Boolean Satisfiability solver, etc. Working for hire, implemented: - efficient multi-threading, scaling real-world workloads almost linearly with the number of CPU cores (128x for AMD Ryzen Threadripper 3990X) - SIMD vectorization (SSE/AVX), up to 8x improvement in computing thread or even copying (see my "Faster alternatives to memcpy" answer on Stackoverflow, URL upon request). - cache-aware algorithms: up to 50x improvement on some workloads - up to 20 trillion operations/second in CUDA (thousands of times faster than CPU) - up to the theoretical limit (6.8 Gigarays/second on RTX 2080 laptop GPU) in ray-tracing with OWL and OptiX - AVX512 and RTM (Restricted Transactional Memory) based acceleration, 16x improvement for float numbers -up to 20x improvements to cryptocurrency miners on CPU using AVX512 and cache-friendly algorithms 13K reputation on Stackoverflow: (1915854/serge-rogatch) Topcoder SRM score: 1480 - among top 5K programmers in the world - top 0.02% (rSerge) During my career, I also took (technical) leadership roles such as Team Lead, Manager, Chief Architect, Vice-President, and CTO. I developed all kinds of networking applications, from Linux Kernel modules up to Web applications. The majority of work was, of course, done at TCP/IP level with socket calls like send/recv/select. Programming languages: C++, C++11/14/17/20, C, Python, x86/x64/ARM/AArch64 assembly, SQL, C# .NET, JavaScript, HTML, CSS, Java, MQL4, MQL5, XML, Cypher, Rust. Libraries/Frameworks: PyTorch, Tensorflow, HuggingFace Transformers/Accelerate/Safetensors, Hivemind/Petals, OpenAI, tiktoken, Django, Flask, STL, LibSVM, XGBoost, libcurl, Selenium, PyTorch, Transformers. Technologies: OpenMP, CUDA, SIMD (AVX&SSE, RTM), Linux Kernel Modules, OptiX, OWL (OptiX Wrapper Library), RTX, raytracing. Theory/Principles/Know-how/Methodologies: Algorithms & Data Structures, Performance Optimization, Artificial Intelligence, Multithreading, Vectorization, Object-Oriented Programming, compiler implementation, linkers, Low-latency, High-frequency, Blockchain. Open source code: Clang, LLVM, LLVM's compiler-rt library, Linux Kernel, a few of my own repositories, contributions to AI and Algorithm open-source projects such as Petals and CBMC. Tools/APIs/Architectures/Platforms: PostgreSQL, MSSQL, MySQL, Neo4j, MATLAB, CMake, GIT, MT4, MetaTrader 5, Conda, PyCharm. Virtual Machines / Containers: Docker, VMWare, VirtualBox, QEmu, Hyper-V. OSes: Windows, Linux, Android, macOS

I am a software engineer with 10 years of experience in software development using J2EE and FE technologies. I have a background in building web services, scalable architectures, cloud technologies, and data management. Core experience: • Web Services, Microservices, REST APIs • Agile Scalable Architectures, High Load Systems, Cloud Technologies, Data Management • Java Performance optimization, Bottlenecks, Concurrency and Multithreading • Front-End, Mobile Application and Desktop Development • Agile Development, CI/CD practices, Security Compliance and more Key skills: • Java · Kotlin · Concurrency & Multithreading · JVM & GC tuning • Spring Framework · RESTful API · Security & OAuth 2.0 · SSL · DNS • Micro services · DigitalOcean · AWS · ActiveMQ · Kafka · RabbitMQ • MySQL · PostgreSQL · Oracle · MongoDB · Redis · Hibernate · CRUD & POJO • JS/TS · React · Angular · jQuery · Bootstrap · Thymeleaf · Websockets · SPA · Node.js · Vue.js • RCP · OSGi · EMF · Cross-Platform Apps · SWT • Financial Protocols: FIX, FIX 4.2, FIX 5.0, Arrowhead, Swift I’m proactive and self-motivated developer, energetic and driven by engineering challenges which add maximum value to company and users. I will gladly be a part of a professional team that values honesty and good-natured communication

I am a professional engineer working in the field of GPGPU. I have 10 years of experience with C/C++ programming. I am skilled in Object Oriented Programming, Multithreading, Algorithms, Optimizations, HPC, Multi-platform solutions (Linux, Windows, macOS). For the past 8 years I've been specializing in highly performant GPGPU solutions for NVidia hardware - GTX, Quadro, RTX and Jetson. I also specialize in Image Quality tuning over a range of ISP platforms, most prominently - Qualcomm.

1. Web Programming (a) Full-stack developer 10+ years of experience in PHP/MySQL/Javascript. Extensive experience in CakePHP/Yii/jQuery/Bootstrap. Node.js ExpressJS Couchbase MongoDB REST API JSON/XML (b) Front-end developer ES6/ES2015 ReactJS Flux/Redux One Page Application using React/React-router (c) API development/integration REST API development Payment Gateway Integration Facebook/Twitter/Instagram API Node/Express REST API 2. Cross platform Mobile Application developer React Native API development for mobile backend 3. Scraper/Crawler Development Awesome web scraper/crawler developer. I use php/java to create crawlers. Curl is used if javascript execution is not necssary, selenium is used if browser emulation is needed. Multithreading, Captcha decoding through DeathByCaptcha, Proxy support CasperJS, PhantomJS expert Development/Production environment: AWS EC2, S3, SES, RDS, Route 53 etc. Linux Mac git

I am a full stack developer with expertise in iOS & Android & web app design and development using Native or Cross-platform development approach. I do Back end development using Nodejs, Firebase, .NET, or PHP technologies. Coding is my passion. I love to bring ideas to life. I work full-time at Upwork and am online 12 hours a day to answer any of your questions. My strengths are: — everyday reports about progress — well commented enterprise-ready source code — ultra-fast response time; — all tasks are recorded in the Issue Tracking system. I use Git to track source code, know JSON, XML, Geo-location, Push, Core Data, Multithreading, and more technologies.

I am a mobile developer with about eight years of experience. I took part in several projects, such as an application for venues and special offers search, a business application for traders, an application for a delivery company, an application for taxi drivers, a live video broadcasting application, audio/video player, downloaders, web-browser. My primary skills are: Flutter, Java Core, Android, Swift, iOS, Design Patterns, Multithreading, Networking, App Core, RxJava, SQL, SQLite, REST, JSON, Google API, Social Networks API, Fragments, XML, Kotlin, Admob, monetization, Proxy, VPN Services

Innovative, passionate, and quick software developer and architect with deep knowledge of programming concepts and internals. 15+ years of hands-on industry experience in programming, designing, managing, & leading software projects & companies. Change agent, problem solver with a passion for technology; skilled in grasping the big picture, conceptualizing, developing & implementing solutions by partnering closely with business leaders. Worked for different type of industries, which includes Health-care Informatics, Lab Informatics, MOOC, Online Education, ERPs, Electronic Design Automation (EDA), Semi Conductor, Heavy mechanical manufacturing, Travel, Pharmaceutical & e-commerce. Skilled in: Python | PHP | Apex | Objective C | Java | C/C++ | Flex | ActionScript | JavaScript | Perl | VB6 iPhone SDK | Android SDK | BlackBerry SDK | Flex SDK | Sancha Django | Django REST | Odoo | Web2Py | Zope | Plone | edX | CodeIgniter | .NET | Java EE SQL Server | MySQL | PostgreSQL | Sybase | DB2 | SQLite | MS Access Odoo | OpenERP | Salesforce CRM | MS SharePoint git | SVN | CVS | VSS | Unfuddle Scrum | UP | UML | CASE Tools | Poseidon | Rambaugh OMT ASP.NET | ASP | Telerik Visual C++| MFC | Win32 | COM | DCOM | OLE | Multithreading ANT | JDK | Digester| Struts | Servlets | JSP | EJB | WebSphere | Eclipse Web 2.0 | AJAX | CSS | XML | XSD OpenSource | github Knowledge Management | MediaWiki | PHP Health-care Informatics | ICD9 | ICD10 | HIPPA | HL7 SEMI Standards | EFEM | SEMI E87 | SEMI E90 | SEMI E40 | Robotics | SECS/GEM | SCADA Customs ERP | Landing Cost | HS Codes | WTO Standards Lab Informatics | Bika | OLiMS | LiMS | LIS Windows | MacOS | Linux | Ubuntu | Unix | EC2 Windows CE | Micro Controller Programming | Dynamic C

Are you looking for a professional software developer who is very thorough, highly organized, and has deep knowledge and experience developing optimized and robust code? Besides having a Bachelor of Computer Science from Moscow State University, I'm a knowledgeable programmer with more than 15 years of experience in the software industry. My last position was with a company that developed enterprise cybersecurity solutions. I was the core architect and developer for the following products: - Privileged Access Management: a set of proxies running in Linux that act as intermediaries between a user and a protected resource, like a Windows station or a database server. Proxies also enforce security policies and control user actions. The solution supports 10+ modern protocols. - Anti-phishing Email Gateway: a security solution that detects and blocks phishing emails to protect users from cyber threats. All the software was written in C++20, and it utilized the following technologies: multi-threading, networking, encryption algorithms, optimization. I also have experience in developing software for stock exchanges. In particular, I designed and developed a server application that works with the Stock Exchange of Hong Kong (HKEX). The application can process market data, send trading orders, keep track of the current market state. The application passed the exchange's certification and was highly optimized to achieve as low as 5 microseconds between receiving a market data packet, taking decisions, and sending trading order requests. The application also provided multiple APIs that allowed developing web UIs for end users. Currently, I'm a full-time freelancer. During my career on Upwork, I've developed many network client-server applications that can serve thousands of clients simultaneously. I'm also a skilled cryptographer. I have a good knowledge of all the modern security algorithms: how they work and how to use them properly. For my projects, I often use such libraries as OpenSSL, Bouncy Castle API, Botan, Crypto++. I'm also an experienced system developer. I can either develop code for a particular operating system or write cross-platform code that works identically in Windows, Linux, and Unix. I believe that my strong points are punctuality, creativity, following deadlines, and meeting clients' needs. I can help you develop software from scratch, or continue evolving someone else's code, control its complexity, stick to the requirements, and finish the job successfully.

Im a freelance developer since 2010, mainly private works from long contacts. We mainly do cross-platform softwares for mac, windows, and linux. My main language is C++ using Qt Creator. Also have extensive experience with .net framework, Php, Javascript, Embarcadero Delphi and C++, Swift.