> Markdown version of [/jobs/ext/3004400-c-engineer-senior-id41762](https://www.wearedevelopers.com/jobs/ext/3004400-c-engineer-senior-id41762). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # C++ Engineer (Senior) Id41762 - **Company:** Agileengine - **Location:** Madrid, Spain (Remote available) - **Contract:** Permanent contract - **Skills:** Microsoft Windows, Application Programming Interfaces (APIs), Agile Methodology, Artificial Intelligence, Apple Mac Systems, Audio Signal Processing, Unit Testing, C++ (Programming Language), CMake, Continuous Integration, Software Debugging, Linux, Memory Management, Design of User Interfaces, IPv6, Qt Modeling Language (QML), Qt (Software), Software Engineering, Systems Integration, Multithreading, Scripting, Standard Template Library (STL), Git, Api Design - **Published:** September 19, 2026 - **Apply:** https://www.buscojobs.com.es/c-engineer-senior-id-41762-en-madrid-ID-370380878 ## About the Role 5+ years of experience with C++ (incl. STL, memory management, multithreading). Experience with Qt 5/6 and QML. Comfortable working on Windows. Networking: strong with TCP/UDP, IPv6, and common protocols. Experience with CMake, Git, and CI/CD workflows. Hands?on experience with unit testing (GTest, GMock). Ability to read and implement against API specs with minimal supervision. Clear communicator who can speak up in product/API design discussions. Availability to overlap 3-4 hours daily with the EST time zone . Upper?Intermediate English level. NICE TO HAVES MacOS/Linux familiarity is a plus. Experience with SIP protocol, audio processing, or TLS. Python scripting for internal tools. Comfortable building/debugging on macOS. Prior experience working in product companies or startup environments. ## Description 1 month ago Be among the first 25 applicantsGet AI-powered advice on this job and more exclusive features.AgileEngine is an Inc. **** company that creates award-winning software for Fortune 500 brands and trailblazing startups across 17+ industries.We rank among the leaders in areas like application development and AI/ML, and our people-first culture has earned us multiple Best Place to Work awards.WHY JOIN US If you're looking for a place to grow, make an impact, and work with people who care, we'd love to meet you!ABOUT THE ROLE As aSenior C++ Engineer , you'll help shape and extend a high-performance telecommunications platform, directly impacting its core features and APIs.Working in a small, skilled team within an Agile environment, you'll tackle challenging technical problems, optimize performance, and collaborate across functions.This role offers ownership, professional growth, and the chance to make meaningful contributions to a product with real-world impact.WHAT YOU WILL DOMaintain, improve, and extend an existing multi-platform codebase written inC++/Qt/QMLwith customized external C libraries.Read and interpret specifications, APIs, and technical documentation to design and implement integrations effectively.Troubleshoot issues and propose efficient solutions with minimal oversight.Contribute to API design and discussions (e.g., device management, CRM management) in collaboration with architects and stakeholders.Ensure code is developed and delivered within aCI/CD pipelineenvironment.Work in anAgileenvironment, actively participating in planning, reviews, and retrospectives.Navigate and work effectively withUI/UX components(basic UI adjustments and integrations with design).MUST HAVES5+ years of experience with C++(incl. STL, memory management, multithreading).Experience with Qt 5/6 and QML.Comfortable working on Windows.Networking: strong with TCP/UDP, IPv6, and common protocols.Experience with CMake, Git, and CI/CD workflows.Hands?on experience with unit testing (GTest, GMock).Ability to read and implement against API specs with minimal supervision.Clear communicator who can speak up in product/API design discussions.Availability to overlap3-4 hoursdaily with theEST time zone .Upper?Intermediate English level.NICE TO HAVESMacOS/Linux familiarity is a plus.Experience with SIP protocol, audio processing, or TLS.Python scripting for internal tools.Comfortable building/debugging on macOS.Prior experience working in product companies or startup environments.PERKS AND BENEFITSProfessional growth : Accelerate your professional journey with mentorship, TechTalks, and personalized growth roadmaps.Competitive compensation : We match your ever?growing skills, talent, and contributions with competitive USD?based compensation and budgets for education, fitness, and team activities.A selection of exciting projects : Join projects with modern solutions development and top?tier clients that include Fortune 500 enterprises and leading product brands.Flextime : Tailor your schedule for an optimal work?life balance, by having the options of working from home and going to the office - whatever makes you the happiest and most productive.Referrals increase your chances of interviewing at AgileEngine by 2xGet notified about new Senior Software Engineer jobs inRibarroja, Valencian Community, Spain .#J-*****-Ljbffr ## Related Videos - [Code to Road in < 12 hours](https://www.wearedevelopers.com/videos/1082-code-to-road-in-12-hours) - [IoT: The road to sustainability](https://www.wearedevelopers.com/videos/557-iot-the-road-to-sustainability) - [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94) - [Your next 10x engineer isn't in your city. Refactor accordingly.](https://www.wearedevelopers.com/videos/100103-your-next-10x-engineer-isn-t-in-your-city-refactor-accordingly) - [Agile work at CARIAD – Creating a customer web application for controlling the vehicle ](https://www.wearedevelopers.com/videos/200-agile-work-at-cariad-creating-a-customer-web-application-for-controlling-the-vehicle) - [Git for Code Reviews](https://www.wearedevelopers.com/videos/429-git-for-code-reviews) ## Related Articles - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers) - [Where To Find Software Engineering Jobs](https://www.wearedevelopers.com/magazine/396-where-to-find-software-engineering-jobs) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers)