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$50/hr
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Job Success
$100K+ earned
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Experienced Entrepreneur with a demonstrated history of working in the software industry since 25+ years. Skilled in
• C++
* C++ modules like CPPRESTSDK, cpp_redis, redis++, boost, jwt-cpp, ODB++ etc.
• Win32
• MFC
• Visual Studio
• C#
• WPF
• .Net
• Pine Script
• WSL
• Linux utilities/services
• AWS
• Docker
• Blockchain
• MQTT, Node.js
• React.js
• Next.js
• Node.js
• Requirements Analysis
• PHP
• Python
• Fortran
• PLC
• SCADA
• DLMS/COSEM
• Agile Methodologies
• Embedded Programing/Firmware
• GigE / USB (GenICam) Industrial Vision Camera (Baumer, Matrix, HikRobot)
• HikRobot VisionMaster Library SDK for image processing (C# and C++)
• RS232/RS485/MODBUS
I carry huge experience in
• NLP
• Vision software
• OCR/OCV
• OpenCV
• CAD/CAM
• Smart Meter
• DLMS/COSEM
• Smart Meter Control Software
• GuruX
• Smart Meter Calibration
• AS Test Bench/CALMATE for Electric meter calibration/accuracy full/semi automatic
• Automation
• Telemetry
• Algo Trading
• MetaTrader
• Tradingview
• CTrader
* AGGrid
Experienced in working with broad range of microcontrollers including
• NRF51822
• NRF52832
• STM32F4
• STM32F0
• STM32F1
• STM32L1
• STM32L4
• STM32H5
• NXP RT1050
• PIC32MX
• MSP430
• STM8S
• STM8L
• PIC16
• 8051
Expertise in a wide array of industry verticals, such as metering (Electricity and Water), fire safety, data loggers (Battery operated), streetlight, and wearables
Strong background in designing and developing firmware architecture and solutions
Proficient in both wired and wireless communication technologies and interfacing the same, including BLE, Wi-Fi, Ethernet, and Cellular
Deep understanding of DLMS/COSEM metering protocols, integration of the same and also experienced in certifying meter with DLMS stack through CTI file and CTT tool.
Experienced in implementing DLMS with various interface profiles, including HDLC-based serial profiles for meter communication over Optical, RS485, and RS232 interfaces. Additionally skilled in using TCP-based wrapper profiles for seamless communication with meters over Ethernet and Cellular networks
Advanced in C programming, with familiarity in C# and Python for supporting tools and utilities. Well-versed in various IDEs and version control tools such as SVN and Git
Experienced with various MCU interfaces including SPI, I2C, ADC, DAC, Timers, DMA, UART, CAN, LTDC, MPU, Flexible memory controller, FlexSPI-Quad SPI
Extensive experience development on FreeRTOS-based development and also bare-metal development
Deep understanding of low-power design, battery-operated products, and efficient power management techniques
Expertise in secondary bootloader development, secure firmware upgrades, and troubleshooting complex firmware issues
No matter what you are after, a proof of concept, maybe an MVP, architecture or a full fledged app, I'd be eager to help you realize your idea and accomplish your goals.
$20/hr
100%
Job Success
$10K+ earned
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As a chief programmer at large company during years, I accumulated essential knowledge in many IT-fields:
- Large scale project development: desktop, web and client-server applications;
- Making applications for cloud services (AWS, Google Cloud Platform, Azure);
- Using AI directly and via API (ChatGpt, Gemini, Copilot);
- Database maintenance, scripting (MsSql, MySql, PostgreSql);
- Scripting (c#, vb, vba, php, javascript, jquery, perl, python);
- MS Office document processing, scripting, converting (interoperability in - .NET, VBA, using office documents in web projects) - Access DB, Excel, MS Project, Word, OneNote, processing and converting of pdf documents.
- GIS processing and scripting - ArcGis, Google maps API.
$50/hr
100%
Job Success
$200K+ earned
Offers consultations
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My name is Saul Hidalgo, a Computer Engineer with a passion for developing Java and .Net software. I have been fortunate to work with exceptional teams and have had the opportunity to contribute to various sectors, including National Security/Defense in the United Kingdom, Oil companies, and Universities such as Harvard Business Publishing. The software I have created is currently being successfully utilized by these organizations.
I thrive on new challenges and continuously seek opportunities to expand my skills. You can explore my public contributions on my GitHub account: saulhidalgoaular.
Below are my areas of expertise and skills:
1. Code Translation and Conversion:
- Proficient in translating code across various languages, with expertise in Python, Java, Delphi, C++, and C#.
2. Document Management System (DMS) - OpenKM:
- Extensive experience in developing workflows, automations, cron tasks, and integrations using the Java/PHP API.
- Configuration of daily backups.
- Skilled in utilizing OpenKM as a DMS.
3. Algorithms and Programming:
- Strong command over algorithms and programming skills, particularly in C/C++ and Java.
- In-depth knowledge of data structures, strings, sorting, arithmetic and algebra, combinatorics, number theory, backtracking, graph traversal, algorithms for graphs, dynamic programming, and computational geometry.
4. Accounting:
- Well-versed in managing material movement between stores and shops.
- Proficient in handling retail-related accounting tasks.
5. Point of Sale (POS) Area:
- Experience in integrating POS software with label printers, fiscal printers, barcode readers, fingerprint scanners, and keyboards.
$120/hr
100%
Job Success
$100K+ earned
Offers consultations
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• Experienced with Internet Service Providers (ISP)
• Passionate about technology since the age of 7
I have a strong academic background in computer science and linguistics, and I'm continuously advancing my knowledge through projects with Google Cloud Platform, Nvidia, Stanford University, and MIT.
☼ Additionally, I have experience securing federal financial aid grants for education.
Skills:
Machine Learning (Tensorflow, Natural Language Processing, Computer Vision)
Development: Java, Unix Development, Microsoft Development, Visual Studio Online, Delphi, Fortran, Pascal
Cloud & DevOps: Google Cloud Platform (GCP), AWS, VirtualBox
Networking: TCP/IP, Cisco, DNS, HTTP, SSH, FTP, VPN, VOIP
Programming & Scripting: bash, cpp, Python, CUDA, OpenACC, OpenCV, OpenMP
Tools: Stripe, Adobe, Autodesk, R, 1C
Database & Web: MySQL, PHP, HTML
Embedded Systems: armhf, Nvidia Jetson
**Project Links**:
- **NVIDIA Developer Profile**: [NVIDIA DevTalk](devtalk.nvidia.com/member/Andrey1984/)
- **Nvidia Jetson Development**: [Viziochron](sites.google.com/site/jetsontricks/)
- **GitHub**: [github.com/AndreV84](github.com/AndreV84/)
- **Kaggle**: [kaggle.com/avolod](kaggle.com/avolod)
- **Project Management**: [projectmanagement.com](projectmanagement.com/profile/AndreyVolodin)
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CV: docs.google.com/document/d/1LY_GJbsqMRzPHIxszqhM22jUKA3kuhhWaari7WIfCCM/
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**Certifications**:
- [Credential Wallet](credential.net/profile/andreyvolodin27/wallet)
- [Statement 1](prod-cert-bucket.s3.amazonaws.com/downloads/d246996e12dc4f37aea85550fa8c7e6b/Statement.pdf)
- [Statement 2](prod-cert-bucket.s3.amazonaws.com/downloads/4d55a64fb7d4419d8e1db46babd2c234/Statement.pdf)
- [Microsoft Virtual Academy](mva.microsoft.com/RewardEvidence.aspx/?key=u1tvx7Dl8W6mvRfAuyEvCg2)
$60/hr
100%
Job Success
$90K+ earned
Available now
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Senior Software Developer and Industrial ML Specialist with over 20 years of experience. In my previous role I built mission critical software, including the control systems (SCADA) used to run pipelines, LRT systems, and power plants. Since then I co-founded a startup to build the ML to augment those systems, optimizing industrial systems to reduce power cost and increase throughput, and building failure prediction and detection systems to avoid costly downtime and repairs.
My industrial background gives me the experience needed to take software past "production ready" to the five-nine reliability needed when a single glitch can take down a multi-billion dollar production system, or prevent life-saving infrastructure from running in an emergency.
As an ML engineer I went back to those same systems with an eye towards the hidden opportunities buried in the raw data. This involved dealing with the complexities of messy real world data such as: missing or malfunctioning instruments, unknown time offsets, unlabelled data, missing logs, and clients with a very different view of the systems. I handled the full lifecycle: data validation and cleaning, feature engineering, model development, application design, and cloud deployment.
As a developer I specialize in C/C++, Python, and JavaScript, and am a skilled full-stack developer with strong Linux/Unix system administration skills. My ML specializes in time series, regression, and categorization, but I have built solutions in many other areas including Computer Vision, Reinforcement Learning, and Large Language Models.
Having co-founded and led a startup I have a strong eye for evaluating business proposals and focusing on what's needed for a successful MVP. For instance, I know when a particular piece of functionally is critical to the value proposition, and thus needs to be absolutely flawless. And I know which bits of functionality just need to be done as quickly and cheaply as possible so the prototype can get out the door.
$100/hr
100%
Job Success
$100K+ earned
Available now
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I build production AI systems, not thin API wrappers. Whether it's a focused MVP or a full-scale platform, I deliver complete pipelines from data ingestion through retrieval and LLM orchestration to deployed, documented APIs.
15+ years in data-intensive software. The last 3+ years focused entirely on LLM-powered products across regulated and high-stakes domains: legal compliance, HR, energy markets, healthcare, financial data, and CX analytics.
Before AI engineering, I spent 8 years as a scientific software engineer at CNRS (French National Research Centre), building research-grade crystallographic software and managing HPC infrastructure. That background in scientific computing and peer-reviewed research is what separates my work from typical AI integrations: I build systems with rigour, not just speed.
What I deliver:
• RAG pipelines over large document corpora with semantic search, hybrid retrieval, and citation tracking (Pinecone, pgvector, sqlite-vec)
• LLM orchestration — multi-step autonomous workflows, streaming chat, prompt management, structured output with validation
• Production FastAPI backends with auth, caching, background processing, and OpenAPI docs
• Data ingestion and extraction pipelines (PDF, Excel, XML, OCR) with AI + traditional fallback strategies
• Full deployment: Docker, Nginx, Gunicorn, DigitalOcean, Azure
Current production systems include:
— Multi-country HR compliance audit platform with branded report exports
— Portuguese labour law compliance engine with OCR and vector-indexed legal corpus
— AI sales outreach platform orchestrating Perplexity research + Claude composition
— CX analytics platform with streaming LLM chat, survey RAG, and embeddable sessions
— Real-time lightning risk monitoring system processing EUMETSAT satellite data
— Automated payroll extraction from mixed-format archives with banking field validation
I own the full backend scope with minimal oversight. Direct communication, clear progress, blockers flagged early.
$45/hr
100%
Job Success
$400K+ earned
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Graduate of engineering, enjoy building websites and web apps .. I've been working as a web developer for 9+ years.
I am very strict for the deadline, my time management is good and always want to work with my client very honestly.
My fields of expertise include (but are not limited to):
- React.js, Next.js, Vue.js
- JavaScript, jQuery
- AngularJS, Node.js
- HTML, HAML, CSS, SASS, Bootstrap, Material-UI, Pure CSS, Tailwind CSS
- Ruby on Rails
- Wordpress, Webflow, Framer, Squarespace, Wix, Sharetribe, Prestashop, Shopify, HubSport
- Git (Github/Bitbucket/Gitlab)
- Heroku, Digital Ocean, GoDaddy, Bluehost
- PHP, MySQL, AWS
- Wordpress Themes:
Divi, Elementor, Themeisle, Envato, Avada, WPBakery, Oxygen Builder
- Plugins:
Contact 7, Gravity Forms, Ninja Forms, Yoast SEO, WP Rocket, Advanced Custom Fields, WooCommerce, Dokan, All in One WP Migration, LiteSpeed
$60/hr
100%
Job Success
$400K+ earned
Offers consultations
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I've been building things on the internet since before most people knew what a web developer was.
30+ years. Dozens of projects. Clients and teams across the UK, USA, Mexico, and Canada.
I started my career at the Met Office—managing global climatic data and building systems used in government briefings. From there, I moved into e-commerce, banking, and global logistics, leading technical builds that had to work at scale, under pressure, and with no room for error.
What I do hasn't changed. The tools just keep getting more powerful.
Today, I work as a Lead Developer and Agentic Engineer. I don’t just build websites or apps; I build intelligent, autonomous systems that solve real operational problems.
Whether it’s a full-stack React/Node.js or PHP/Python platform, a custom automation pipeline, or an AI agent that replaces hours of manual work—I design and build it from the ground up.
My latest project is CarbonVerified.uk—an agentic AI system automating Net Zero compliance for UK SMEs. It’s a perfect example of what’s possible when you combine three decades of engineering with modern AI orchestration using Claude 4.6, Gemini 3.1, and GPT-5.3.
If you’re a business that needs something built properly—not templated, not outsourced, and not over-engineered—let’s talk.
Invite me to your project, and let’s solve it.
$70/hr
100%
Job Success
$10K+ earned
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PhD FEM Engineer & Impact Protection Designer | Structural & Thermal Analysis Expert | ANSYS/ABAQUS | Energy Efficiency Specialist
Struggling with inaccurate models or tight deadlines? As a PhD professor with 15+ years in finite element methods (FEM) and 191+ Google Scholar citations, I deliver robust structural and/or thermal analyses that cut redesign costs by 25-30%. My custom primal-mixed FEM code is designed for multiscale multimaterials (high-aspect-ratio elements) and energy-efficient building designs.
Recent Wins: Optimized anti-impact systems for German client, delivering 7 days early. Reduced material use by 20% via geotechnical simulations.
My Process: Scope & Milestones: Clear timelines with 20% buffer for reliability.
Advanced Analysis: ANSYS/ABAQUS-driven models + custom code for accuracy.
Validated Results: Iterative reviews ensure 100% client satisfaction.
Why Choose Me? NAFEMS Steering Committee member; trusted by KOVIS Slovenia, Fatzer AG Switzerland and Onesteel Australia .
EU-based (Belgrade, Serbia), and Zurich for seamless collaboration.
Fluent in English/Serbian, conversational German.
Skills:
Finite Element Method (FEM)
ANSYS
ABAQUS
Structural Analysis
Thermal Analysis
Impact Protection Design
Geotechnical Engineering
Energy Efficiency Modeling
Thermo-Elasticity
Primal-Mixed FEM Code
Multiscale Analysis
Structural Optimization
Python for Simulations
MATLAB
Vibration Modeling
$24/hr
100%
Job Success
$20K+ earned
Available now
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I am a theoretical physicist and an applied mathematician, with 8+ years of experience in computational science, model building, and scientific and technical writing. My strong scientific background recently led to a profound interest in machine learning theory and applications, specifically to healthcare, science, and environmental studies.
I collaborate with industries and educational institutions to address complex technical challenges through data-driven solutions, advanced modeling, and precise scientific documentation.
🔹 My Core Expertise:
✅ Mathematical & Computational Modeling – Advanced physics, engineering, and R&D simulations and problem-solving.
✅ Scientific & Technical Writing – Research papers, educational content, and technical documentation.
✅ AI & Data Science – Data analysis, model development, and AI training in Mathematics, Physics, French, and Arabic.
✅ LaTeX Proficiency – Professional structuring of theses, reports, and scientific papers.
🔥 Services I Provide
🧑🔬 Computational Science & Research:
✔ Mathematical modeling and algorithm development.
✔ High-performance simulations in Python & Fortran.
✔ Clear and structured LaTeX documentation.
✔ Code optimization and debugging.
✍ Scientific & Educational Writing:
✔ Develop curricula for schools, e-learning platforms, and institutions.
✔ Technical writing & proofreading for research papers, theses, and articles.
✔ Custom problem sets & worksheets for GRE, SAT, GMAT, and academic curriculums.
✔ Lesson creation in Physics and Mathematics for various grade levels.
💡 Why Work With Me?
🔹 Expert Problem Solver – Strong analytical and computational skills.
🔹 Detail-Oriented – High precision in coding, documentation, and content creation.
🔹 Reliable & Efficient – Delivering high-quality work with revisions included.
📩 Let’s collaborate! Send me a message to discuss your project needs.
🟨 Some Reviews:
✅ "𝐉𝐨𝐛 𝐡𝐚𝐬 𝐛𝐞𝐞𝐧 𝐜𝐨𝐦𝐩𝐥𝐞𝐭𝐞𝐝 𝐞𝐱𝐜𝐞𝐩𝐭𝐢𝐨𝐧𝐚𝐥𝐥𝐲 𝐠𝐨𝐨𝐝. 𝐈 𝐡𝐚𝐯𝐞 𝐫𝐞𝐜𝐞𝐢𝐯𝐞𝐝 𝐦𝐨𝐫𝐞 𝐭𝐡𝐚𝐧 𝐦𝐲 𝐞𝐱𝐩𝐞𝐜𝐭𝐚𝐭𝐢𝐨𝐧𝐬. 𝐈 𝐰𝐨𝐮𝐥𝐝 𝐥𝐢𝐤𝐞 𝐭𝐨 𝐰𝐨𝐫𝐤 𝐰𝐢𝐭𝐡 𝐡𝐢𝐦 𝐚𝐠𝐚𝐢𝐧."
✅ "𝐙𝐚𝐤𝐚𝐫𝐢𝐚 𝐢𝐬 𝐚 𝐛𝐫𝐢𝐥𝐥𝐢𝐚𝐧𝐭 𝐝𝐮𝐝𝐞! 𝐖𝐞 𝐡𝐚𝐝 𝐚 𝐜𝐡𝐚𝐥𝐥𝐞𝐧𝐠𝐢𝐧𝐠 𝐭𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐩𝐫𝐨𝐛𝐥𝐞𝐦 𝐰𝐡𝐞𝐫𝐞 𝐰𝐞 𝐡𝐚𝐝 𝐭𝐨 𝐦𝐚𝐤𝐞 𝐚 𝐬𝐢𝐦𝐮𝐥𝐚𝐭𝐢𝐨𝐧 𝐟𝐨𝐫 𝐚𝐧 𝐞𝐱𝐭𝐞𝐧𝐬𝐢𝐯𝐞 𝐜𝐚𝐭𝐡𝐨𝐝𝐢𝐜 𝐩𝐫𝐨𝐭𝐞𝐜𝐭𝐢𝐨𝐧 𝐬𝐲𝐬𝐭𝐞𝐦 𝐚𝐧𝐝 𝐡𝐞 𝐣𝐮𝐬𝐭 𝐡𝐞𝐥𝐩𝐞𝐝 𝐮𝐬 𝐂𝐑𝐔𝐒𝐇 𝐭𝐡𝐞 𝐦𝐚𝐭𝐡".
✅ "𝐙𝐚𝐤𝐚𝐫𝐢𝐚 𝐰𝐚𝐬 𝐞𝐱𝐭𝐫𝐞𝐦𝐞𝐥𝐲 𝐡𝐞𝐥𝐩𝐟𝐮𝐥, 𝐚𝐧𝐝 𝐤𝐧𝐨𝐰𝐥𝐞𝐝𝐠𝐞𝐚𝐛𝐥𝐞 - 𝐛𝐨𝐭𝐡 𝐜𝐨𝐦𝐩𝐥𝐞𝐭𝐢𝐧𝐠 𝐭𝐚𝐬𝐤𝐬 𝐭𝐨 𝐚 𝐡𝐢𝐠𝐡 𝐬𝐭𝐚𝐧𝐝𝐚𝐫𝐝 𝐰𝐢𝐭𝐡𝐢𝐧 𝐚 𝐭𝐢𝐦𝐞𝐥𝐲 𝐦𝐚𝐧𝐧𝐞𝐫. 𝐇𝐞 𝐰𝐚𝐬 𝐬𝐮𝐩𝐞𝐫 𝐫𝐞𝐬𝐩𝐨𝐧𝐬𝐢𝐯𝐞 𝐚𝐧𝐝 𝐞𝐚𝐬𝐲 𝐭𝐨 𝐰𝐨𝐫𝐤 𝐰𝐢𝐭𝐡, 𝐰𝐨𝐮𝐥𝐝 𝐝𝐞𝐟𝐢𝐧𝐢𝐭𝐞𝐥𝐲 𝐫𝐞𝐜𝐨𝐦𝐦𝐞𝐧𝐝!"
✅ "𝐙𝐚𝐤𝐚𝐫𝐢𝐚 𝐫𝐞𝐯𝐢𝐞𝐰𝐞𝐝 𝐚 𝐬𝐜𝐢𝐞𝐧𝐭𝐢𝐟𝐢𝐜 𝐦𝐚𝐧𝐮𝐬𝐜𝐫𝐢𝐩𝐭 𝐟𝐨𝐫 𝐨𝐮𝐫 𝐩𝐮𝐛𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧. 𝐙𝐚𝐤𝐚𝐫𝐢𝐚'𝐬 𝐤𝐞𝐞𝐧 𝐞𝐲𝐞, 𝐢𝐧-𝐝𝐞𝐩𝐭𝐡 𝐚𝐧𝐚𝐥𝐲𝐬𝐢𝐬, 𝐚𝐧𝐝 𝐭𝐡𝐨𝐮𝐠𝐡𝐭𝐟𝐮𝐥 𝐬𝐮𝐠𝐠𝐞𝐬𝐭𝐢𝐨𝐧𝐬 𝐡𝐚𝐯𝐞 𝐜𝐨𝐧𝐭𝐫𝐢𝐛𝐮𝐭𝐞𝐝 𝐬𝐢𝐠𝐧𝐢𝐟𝐢𝐜𝐚𝐧𝐭𝐥𝐲 𝐭𝐨 𝐭𝐡𝐞 𝐨𝐯𝐞𝐫𝐚𝐥𝐥 𝐢𝐦𝐩𝐫𝐨𝐯𝐞𝐦𝐞𝐧𝐭 𝐨𝐟 𝐭𝐡𝐞 𝐩𝐚𝐩𝐞𝐫."
🟦 Skills:
𝐏𝐫𝐨𝐠𝐫𝐚𝐦𝐦𝐢𝐧𝐠 𝐋𝐚𝐧𝐠𝐮𝐚𝐠𝐞𝐬: Python, R, Fortran, LaTeX.
𝐒𝐨𝐟𝐭𝐰𝐚𝐫𝐞𝐬: Excel, Google Sheets, MS Office, LibreOffice, Mathematica, Maple, Tableau.
𝐊𝐧𝐨𝐰𝐥𝐞𝐝𝐠𝐞 𝐨𝐟: Git, GitHub.
𝐏𝐡𝐲𝐬𝐢𝐜𝐬 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 𝐀𝐫𝐞𝐚: Mechanics, Electromagnetism, Fluid Mechanics, Quantum Mechanics, Special and General Relativity, Optics, Nuclear and Atomic Physics, Quantum Field Theory, and Quantum Information.
𝐌𝐚𝐭𝐡𝐞𝐦𝐚𝐭𝐢𝐜𝐬 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 𝐀𝐫𝐞𝐚: Trigonometry, Calculus, Differential Equations, Ordinary and Partial Differential Equations, Complex Calculus, Group Theory, Topology and Geometry, Tensor Calculus, Mathematical Physics, Numerical Analysis.
Zakaria D.
has worked
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