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Title: Windows Endpoint Engineer (C++ / Rust / .NET) Description: We are looking for an experienced Windows developer to build a lightweight client application consisting of a background service and a per-user agent. The project involves low-level Windows API integration, system hooks, and enterprise-ready packaging. Responsibilities: Develop a Windows service (LocalSystem) and per-user agent process. Implement clipboard, paste, and text input monitoring using Win32 APIs, low-level keyboard hooks, and UI Automation (UIA). Build a local detection engine (normalization, regex with checksum validation, Bloom filters, SimHash/MinHash similarity). Implement IPC between service and agent (Named Pipes). Handle local secure storage (SQLite/JSONL with DPAPI encryption). Build overlay UI components (toast-style warnings, always-on-top, DPI/multi-monitor aware). Package as MSI (WiX), with Intune/SCCM deployment readiness. Integrate auto-update mechanism with signature validation and rollback. Apply hardening: ASLR/DEP/CFG, WDAC/AppLocker guidance, EV Authenticode signing. Optimize for low latency (under 10ms per event scan), low idle CPU (under 1 percent), and small memory footprint (under 80 MB per process). Requirements: Strong expertise in C++ (C++17/20) or Rust with Win32/Windows-rs bindings. Proven experience with UI Automation (UIA) and low-level keyboard/mouse hooks. Familiarity with ETW event consumption (DNS, WinHTTP, Schannel, MsQuic) or WFP callouts for PID to Domain mapping. Experience with regex libraries (RE2, Hyperscan) and checksum algorithms (Luhn, IBAN mod97). Hands-on knowledge of inter-process communication (Named Pipes, shared memory). Experience building MSI installers (WiX Toolset) and deploying via Intune/SCCM. Knowledge of code signing, DPAPI, and Windows security hardening. Ability to write efficient, low-latency, fault-tolerant code for production endpoints. Nice to Have: Experience with Windows Filtering Platform (WFP) driver development. Knowledge of enterprise endpoint environments (RDS/Citrix session handling, multi-monitor DPI). Familiarity with crash reporting pipelines and staged rollout update systems. Deliverables: Windows service and agent executables. Secure policy cache and local event storage. MSI installer, signed binaries, auto-update system. Documentation (installation, deployment, update process, WDAC/AppLocker rules). Test coverage across Edge/Chrome/Firefox, multiple paste/input methods, and high-DPI/multi-monitor environments.
Project ID: 39732052
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Active 8 mos ago
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45 freelancers are bidding on average $37 USD/hour for this job

A Warm Hello We are readily available to start working on this project! We will design and deliver a production-ready, low-latency Windows endpoint solution composed of a LocalSystem service plus a per-user agent. The system will monitor clipboard/paste/text input, perform local detection via normalization + checksums + approximate-similarity (SimHash/MinHash/Bloom filters), communicate securely via Named Pipes, persist minimal encrypted policy/cache, surface toast-style overlays, and ship as an MSI (WiX) ready for Intune/SCCM deployment. Security hardening, code signing, and an auto-update mechanism with signature validation and rollback are included. Core components - Windows Service (LocalSystem) - Per-user Agent - Detection Engine (local) - IPC - Local Secure Storage - Overlay / UI - Installer / Packaging - Auto-update - Hardening & Build - Telemetry & Diagnostics - Testing & Performance I am available online for the interview else we could fix a meeting and discuss the project in detail. I am Sincerely looking forward to communicate with you as a person and I would really appreciate if you give us your valuable time. Regards, Ana
$38 USD in 40 days
9.8
9.8

Hello, I understand you're looking for an experienced developer to create a lightweight Windows client application that includes both a background service and a per-user agent. I have solid expertise in C++ and Rust, and I'm well-versed in low-level Windows API integration and system hooks. My approach will focus on building a robust architecture that ensures low latency and a minimal CPU footprint while implementing features like clipboard monitoring and secure local storage. I will leverage my knowledge of IPC, such as Named Pipes, to create effective communication between the service and agent. Additionally, I'll ensure that the application is packaged as an MSI with deployment readiness for Intune/SCCM. My goal is to deliver a feature-rich application that meets all your performance and security needs. What specific functionalities or performance metrics are most critical for this application to meet your expectations? Thanks, Muhammad Awais
$25 USD in 23 days
9.2
9.2

Drawing from my extensive experience in building high-quality software applications, I am confident that I can execute your Windows Client Application project with utmost precision and excellence. My proficiency in C++ and Rust, coupled with my deep understanding of Win32/Windows-rs bindings, is rare and well-suited for precisely what your project demands. Additionally, I'm vastly knowledgeable in UI Automation (UIA) and low-level keyboard/mouse hooks, which are critical elements in your project. Apart from delivering top-tier Windows services and agent executables, I will also design and develop efficient IPC between service and agent using named pipes. My skillset extends to include deploying via Intune/SCCM and building MSI installers using WiX Toolset—skills vital to your enterprise-ready packaging requirements. Furthermore, I exhibit a strong background in security hardening, DEFENSE_CODE_ENABLE_REGISTRATION,__COMPONENT_ACCESS__ENABLE_ protection, ensuring your application is safeguarded. I also possess a knack for delivering projects that are optimized for low latency, low idle CPU usage, and small memory footprint—attributes crucial to your project's success. With these skills at my disposal, I guarantee you a robust client application delivered within the stipulated timeframes.
$38 USD in 40 days
8.7
8.7

Hello, I have extensive experience building Windows endpoint applications in C#/.NET with a strong focus on system-level integrations, low-latency monitoring, and enterprise deployment. Your requirements align closely with projects I’ve delivered for financial and enterprise clients where security, performance, and maintainability were critical. Relevant Expertise Windows API: Implemented low-level keyboard/mouse hooks and UI Automation (UIA) for input and clipboard monitoring. Detection Engine: Built normalization + regex-based engines with checksum validation (Luhn, mod97) and approximate similarity search IPC & Secure Storage: Designed inter-process communication using Named Pipes and secured local caches Overlay UI: Developed DPI/multi-monitor aware always-on-top notifications with smooth performance. Enterprise Packaging: Delivered MSI installers (WiX), integrated with Intune/SCCM, plus EV code-signed binaries. Performance Optimization: Proven record of optimizing services for idle CPU usage and event handling. I can start immediately or within your preferred timeline. My proposal is to scope the first milestone around delivering the Windows service + IPC foundation, ensuring the performance targets (<10ms scan, <80MB per process, <1% idle CPU) are validated early. Would you like me to prepare a phased technical plan (with hours + cost per milestone) so you have a clear roadmap from prototype → production-ready endpoint? Best regards,
$25 USD in 40 days
7.8
7.8

⭐⭐⭐⭐⭐ Create a Lightweight Windows Client Application with C++ or Rust ❇️ Hi My Friend, I hope you're doing well. I've reviewed your project details and noticed you're looking for a Windows Endpoint Engineer. Look no further; Zohaib is here to help you! My team has successfully completed 50+ similar projects focused on Windows development. I will create a lightweight client application with a background service and a user-friendly agent, ensuring it meets your requirements efficiently. ➡️ Why Me? I have 5 years of experience in Windows development using C++ and Rust, specializing in low-level API integration and UI Automation. My expertise includes building secure storage solutions, implementing inter-process communication, and optimizing applications for performance. Additionally, I have a strong grip on deployment strategies and security hardening techniques. ➡️ Let's have a quick chat to discuss your project in detail. I can also share samples of my previous work. Looking forward to our conversation! ➡️ Skills & Experience: ✅ C++ (C++17/20) ✅ Rust ✅ Windows API Integration ✅ UI Automation (UIA) ✅ Low-Level Keyboard Hooks ✅ Inter-Process Communication (Named Pipes) ✅ MSI Installer Creation (WiX Toolset) ✅ SQLite/JSONL with DPAPI ✅ Auto-Update Mechanisms ✅ Security Hardening (ASLR/DEP/CFG) ✅ Regex Libraries (RE2, Hyperscan) ✅ Performance Optimization Waiting for your response! Best Regards, Zohaib
$30 USD in 40 days
7.7
7.7

With over a decade of experience in web and mobile development, I understand the importance of finding an experienced Windows developer for your project. Your need for a Windows Endpoint Engineer adept in C++, Rust, and .NET is crucial for building a lightweight client application with enterprise-ready packaging. I bring relevant experience in developing secure and efficient Windows services and agents, as well as expertise in low-level Windows API integration and UI Automation. My track record in handling inter-process communication, implementing IPC using Named Pipes, and building MSI installers aligns perfectly with your project requirements. In the realm of Windows Filtering Platform and enterprise endpoint environments, I have successfully delivered tailored solutions that meet and exceed client expectations. My commitment to writing efficient, low-latency code for production endpoints ensures that your project will be optimized for performance and reliability. Let's discuss how I can contribute to the success of your project. Please feel free to reach out to me to take the next steps towards building the Windows client application you envision.
$40 USD in 15 days
7.4
7.4

I am an experienced Windows developer with strong expertise in C++ and Win32 APIs. I have proven experience with UI Automation and low-level keyboard/mouse hooks. I am familiar with implementing clipboard monitoring and secure storage. Additionally, I have hands-on knowledge of inter-process communication and building MSI installers. I am confident in delivering efficient, low-latency, fault-tolerant code for production endpoints.
$25 USD in 40 days
7.3
7.3

Dear employer, I’m an expert .NET Windows Desktop developer with strong knowledge of C++ programming and around 15 years of experience. Over the years, I have completed numerous projects involving: Windows API calls and system hooks, Clipboard monitoring, Inter-process communication using named pipes, Windows services, Custom credential providers for Windows login, Working with various databases, Creating MSI setup packages, Developing portable single-exe Windows applications with auto-update features I’m very interested in working with you on this project and can deliver a high-quality solution with excellent performance. Please feel free to message me so we can discuss the details, and I can share samples of my previous work if required. You can also find a selection of my past projects in my portfolio. Best regards
$50 USD in 40 days
6.1
6.1

Hello Noah M., I hope this message finds you well. My name is Mikhail, and I'm reaching out to express my interest in your project titled "Windows Client Application Developer" With extensive experience and a strong skill set in .NET, Windows Desktop, Software Architecture, Regular Expressions, C++ Programming, Rust, Windows API and C# Programming, I am confident in my ability to deliver outstanding results that meet your expectations. I have a proven track record of successfully completing similar projects, and I am eager to bring my expertise to your initiative. Understanding the importance of timely delivery and budget constraints, I am committed to providing efficient solutions without compromising on quality. I prioritize clear communication and collaboration, ensuring that we are aligned throughout the project's duration. I would be thrilled to discuss how I can contribute to your project's success in more detail over chat. Looking forward to the opportunity to work together. Best regards, Mikhail
$30 USD in 18 days
5.1
5.1

Hi there, I'd love the opportunity to connect and discuss your project in detail—feel free to reach out via chat anytime. I'm a full-stack developer with strong experience in building both web and desktop applications. I’m confident I can manage and deliver your project efficiently and on time. In addition to my development background, I’m a Web3 enthusiast actively learning smart contract development through Updraft/Cyfrin, and I have hands-on experience in DevOps, giving me a broader perspective on project deployment and scalability. My technical expertise includes: MERN / MEAN Stack: Extensive hands-on and team leadership experience, ensuring smooth front-end to back-end integration. .NET Core & Angular: Implemented various data visualizations using D3.js, integrated complex APIs, and developed dynamic, responsive applications. Azure Logic Apps & SharePoint: Built multiple workflow automation solutions; also familiar with PowerApps development. Salesforce Development: Developed Apex triggers to interact with MSSQL via custom .NET APIs. Created Visualforce pages to fetch and display external API data. Performed CRUD operations on both standard/custom Salesforce objects. Conducted R&D on Salesforce Flows for automation (with some custom object limitations). I bring a full-lifecycle development mindset and enjoy solving real-world business challenges through code. Looking forward to hearing from you! Thanks!
$50 USD in 40 days
5.0
5.0

Hi. Your project sounds like an excellent fit for my background in Windows systems programming. I’ve built lightweight Windows services and user-level agents in C++17/20, .NET, and Rust, working with Win32 APIs, UI Automation, and low-level keyboard hooks. In past work I’ve implemented secure LocalSystem services with Named Pipes IPC, clipboard and input monitoring, and detection engines using regex plus checksum and similarity algorithms. I’ve also handled secure local storage with SQLite/JSONL and DPAPI encryption, and developed always-on-top overlay UIs that are DPI and multi-monitor aware. On the deployment side, I’ve packaged apps with WiX/MSI, signed binaries with EV Authenticode, and delivered through Intune/SCCM. I’m comfortable applying hardening measures like ASLR, DEP, CFG, and configuring WDAC/AppLocker rules. Performance is something I always prioritize — keeping idle CPU under one percent, memory under 80 MB, and scan latency below 10 ms. I can deliver the service, agent, detection engine, UI overlay, installer, and documentation, with a phased plan so you can review step by step. Would you like me to share how I’d structure the first phase? Best regards, Benjamin
$45 USD in 40 days
4.6
4.6

Hi there, This Windows client application project looks challenging and exciting, and I’d love to help bring it to production. I have experience building low-latency, lightweight Windows services and per-user agents using C++ and Rust, including system hooks, clipboard and input monitoring, and secure local storage. For your project, I can implement the background service, agent process, IPC via Named Pipes, UI overlays, MSI packaging, Intune/SCCM deployment readiness, auto-update with signature validation, and apply full Windows hardening practices. I’ve also worked with regex engines, checksum validation, SimHash/MinHash, ETW/WFP data consumption, and performance optimization to keep CPU and memory usage minimal. I can deliver signed, deployable binaries, documentation for installation and maintenance, and robust testing across Edge, Chrome, Firefox, multi-monitor, and high-DPI setups. My focus will be on clean, efficient, fault-tolerant code that meets enterprise standards and scales reliably. Best, Daniel Glassen
$40 USD in 40 days
4.7
4.7

Carrying over from TWEELANCE unique And highly adept at software engineering, our team has exceptional hands-on experience with the specific technologies and skills required for your Windows Client App project. With our in-depth expertise in C++ (C++17/20) and DotNET development, we guarantee a proficient understanding of the core programming languages necessary for your project. We have a proven record of creating functioning software with optimal performance. With high priority on security, we have intimate knowledge of cryptography including encryption algorithms like DPAPI. Not only do we provide accurate and efficient coding solutions, but also we strive to make life easier for the end-users with convenient installation and integration processes. We are well versed in creating MSI installers with WiX and deploying through Intune/SCCM. Our customers can vouch for our punctuality and reliability when it comes to project delivery. Our thoroughness extends beyond the deliverable itself; we heavily emphasize documentation to enhance user experience. In that light, you can rest assure proper documentations (installation, deployment, up
$40 USD in 40 days
4.2
4.2

Hi, Noah M. I 've check your project " Windows Client Application Developer " carefully and understood what you want. I am senior full stack developer with 10 years of experience who is good at Rust, Windows API, .NET, Software Architecture, C++ Programming, Windows Desktop, Regular Expressions and C# Programming and I think I can complete your project with similiar experience. I would like to have a brief discussion for your project very soon. Best regards, Benjamin
$50 USD in 20 days
0.0
0.0

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