C++/Qt Software Engineer – Desktop Applications

Rakuten Viber

C++/Qt Developer for Viber enhancing desktop applications across Windows, macOS, and Linux. Involved in feature development, debugging, and collaboration with product and design teams.

Posted 6/9/2026full-timeWarsaw • 🇵🇱 PolandMid-LevelSeniorWebsite

Tech Stack

Tools & technologies

C++JavaScriptLinuxMacOSPythonQtSQLite

About the role

Key responsibilities & impact

Drive the end-to-end development of new features and communication capabilities within the cross-platform Viber for Desktop application, utilizing C++ and the Qt framework (QML/Qt Quick).
Perform deep-level diagnosis, debugging, and performance optimization across the entire application stack, from the UI (Qt Quick/QML) down to network layers and database interactions (SQLite).
Actively participate in architecture discussions and contribute to the ongoing refinement, refactoring, and standardization of the C++ codebase to maintain high quality and minimize technical debt.
Collaborate closely with product, design, and QA teams to ensure seamless integration and deployment of new functionalities across Windows, macOS, and Linux platforms.

Requirements

What you’ll need

Minimum of 5 years of professional experience in C++/Qt development.
Expert-level proficiency with the Qt framework, including Qt Quick and QML.
Demonstrated expertise in modern C++ standards (C++17/20).
Solid experience with the CMake build system, Python, and JavaScript (JS).
Proven track record in developing and maintaining cross-platform applications targeting Windows, macOS, and Linux operating systems.
Extensive experience working with relational databases, specifically SQLite.
Deep understanding and practical experience with client-server architecture and network programming concepts.
Comprehensive knowledge of multi-threading, concurrency control, and robust memory management techniques.
Proficiency in utilizing performance profiling and optimization tools.

Benefits

Comp & perks

🌐 Worldwide ❌ Jobs You've Hidden ⭐️ Saved Jobs ✅ Applied Jobs ✉️ Email Alerts 👤 Account Rakuten Viber Website LinkedIn All Job Openings 201 - 500 employees Founded 2010 🤝 B2B 👥 B2C 🛍️ eCommerce B2B
B2C
eCommerce Rakuten Viber is a communication platform that offers a variety of tools for businesses to connect with their customers, providing solutions like Viber Verification and SecurePlus Messages for enhanced security. It allows brands to set up engaging campaigns and build emotional connections with users through its super app features. With a global audience utilizing the platform for daily interactions, Rakuten Viber facilitates personal brand-to-consumer connections, driving marketing success and customer loyalty. C++/Qt Software Engineer – Desktop Applications 🔥 48 minutes ago 🏢 Warsaw – Onsite ⏰ Full Time 🟡 Mid-level 🟠 Senior 🔙 Backend Engineer C++ JavaScript Linux MacOS Python Qt SQLite Apply Now Find Hiring Managers Customize resume + cover letter Report problem ☆ Save ☑️ Mark as applied ❌ Hide 📋 Description
Drive the end-to-end development of new features and communication capabilities within the cross-platform Viber for Desktop application, utilizing C++ and the Qt framework (QML/Qt Quick).
Perform deep-level diagnosis, debugging, and performance optimization across the entire application stack, from the UI (Qt Quick/QML) down to network layers and database interactions (SQLite).
Actively participate in architecture discussions and contribute to the ongoing refinement, refactoring, and standardization of the C++ codebase to maintain high quality and minimize technical debt.
Collaborate closely with product, design, and QA teams to ensure seamless integration and deployment of new functionalities across Windows, macOS, and Linux platforms. 🎯 Requirements
Minimum of 5 years of professional experience in C++/Qt development.
Expert-level proficiency with the Qt framework, including Qt Quick and QML.
Demonstrated expertise in modern C++ standards (C++17/20).
Solid experience with the CMake build system, Python, and JavaScript (JS).
Proven track record in developing and maintaining cross-platform applications targeting Windows, macOS, and Linux operating systems.
Extensive experience working with relational databases, specifically SQLite.
Deep understanding and practical experience with client-server architecture and network programming concepts.
Comprehensive knowledge of multi-threading, concurrency control, and robust memory management techniques.
Proficiency in utilizing performance profiling and optimization tools. Apply Now 📊 Check your resume score for this job Improve your chances of getting an interview by checking your resume score before you apply. Check Resume Score Similar Jobs Software Engineer, Python/TS 🕒 May 22 Paramount 10,000+ employees 📱 Media 👥 B2C Website LinkedIn All Job Openings Software Engineer developing advanced advertising solutions for Paramount. Involved in every stage of SDLC and focusing on collaboration and modern web technologies. 🏢 Warsaw – Onsite ⏰ Full Time 🟡 Mid-level 🟠 Senior 🔙 Backend Engineer AWS Cloud Jenkins Microservices Python React SDLC SQL TypeScript Vue.js Backend Engineer 🕒 May 15 SD Solutions 201 - 500 🤝 B2B 🎯 Recruiter 🏢 Enterprise Website LinkedIn All Job Openings Backend Engineer designing and maintaining robust server-side systems for NDA, FinTech products. Collaborating with cross-functional teams to deliver reliable solutions in a fast-paced fintech environment. 🏢 Warsaw – Onsite ⏰ Full Time 🟠 Senior 🔴 Lead 🔙 Backend Engineer AWS Cloud Distributed Systems DynamoDB GraphQL Java Kafka Kotlin Microservices MongoDB MySQL Postgres RabbitMQ Senior IT Developer, Python 🕒 May 6 Cookie Information 51 - 200 🤝 B2B 📋 Compliance Website LinkedIn All Job Openings Senior IT Developer developing modern backend solutions and working on GEN AI projects at DSV. Collaborating with teams on integration and quality assurance while ensuring application stability. 🏢 Warsaw – Onsite ⏰ Full Time 🟠 Senior 🔙 Backend Engineer 🗣️🇵🇱 Polish Required Azure Python SQL Manager, Engineering – Java, Kotlin 🕒 December 21, 2025 Allegro 1001 - 5000 🛍️ eCommerce 🏪 Marketplace 🚗 Transport Website LinkedIn All Job Openings Engineering Manager leading the Recommendation team at Allegro to build tools for recommendations. Collaborating with Machine Learning team to enhance customer experience. 🏢 Warsaw – Onsite 💰 Debt Financing on 2017-01 ⏰ Full Time 🟡 Mid-level 🟠 Senior 🔙 Backend Engineer 🗣️🇵🇱 Polish Required Apache Cloud Google Cloud Platform Java Kotlin Python Scala Spark Spring Spring Boot SpringBoot Manager, Engineering – .NET 🕒 October 23, 2025 Allegro 1001 - 5000 🛍️ eCommerce 🏪 Marketplace 🚗 Transport Website LinkedIn All Job Openings Engineering Manager at Allegro Pay leading a team to develop products for the FinTech sector. Manage engineering tasks and ensure alignment with company priorities in Warsaw. 🏢 Warsaw – Onsite 💰 Debt Financing on 2017-01 ⏰ Full Time 🟡 Mid-level 🟠 Senior 🔙 Backend Engineer 🗣️🇵🇱 Polish Required Distributed Systems View More Backend Engineer Jobs 🌐 Worldwide Built by Lior Neu-ner. I'd love to hear your feedback — Get in touch via DM or support@remoterocketship.com Search Search Jobs by country Search jobs by city Search jobs by job title Search entry-level jobs Search junior-level jobs Search senior-level jobs Search jobs by tech stack Search jobs by contract type Search remote internships Search remote part-time jobs Remote jobs Anywhere in the World Companies Hiring Anywhere in the World Companies Hiring Sales People Anywhere in the World Companies Hiring Software Engineers Anywhere in the World Resources Advice Tips for finding remote jobs Interview questions and answers Resume examples Cover letter examples Post a job Affiliates Privacy policy Terms of service Job board SEO course AI Apply Copilot OpenClaw job finder Jobs by Country Remote jobs anywhere in the world (Worldwide remote jobs) Remote jobs United States Remote jobs Australia Remote jobs Brazil Remote jobs Canada Remote jobs France Remote jobs Ireland Remote jobs Germany Remote jobs Netherlands Remote jobs Spain Remote jobs UK Popular Jobs Remote data analyst jobs Remote customer support jobs Remote executive assistant jobs Remote marketing jobs Remote product designer jobs Remote product manager jobs Remote project manager jobs Remote recruiter jobs Remote sales jobs Remote software engineer jobs Jobs by Type Remote full-time jobs Remote part-time jobs Remote contract jobs Remote internship jobs Remote entry-level jobs Remote jobs with no experience required Remote junior jobs (1-3 years of experience) Digital nomad jobs Remote jobs with no degree required Freelance remote jobs Temporary remote jobs Remote jobs hiring now Stay at home mom jobs

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Hard Skills & Tools

C++Qt frameworkQt QuickQMLCMakePythonJavaScriptSQLitemulti-threadingperformance optimization

Soft Skills

collaborationcommunicationproblem-solvingarchitecture discussionsrefactoringstandardization