C++ / C# Developer

🏢 Summary: Long-term remote B2B contract for a C++/C# Developer focused on complex enterprise and public-sector software development and system integration projects. The role involves building, integrating, testing, and maintaining scalable solutions within CI/CD-driven Visual Studio environments. The developer contributes to architecture, technical documentation, and integration of third-party components in large-scale projects. 🗂️ Requirements: Fluent German C1, English minimum B1, Bachelor's degree in Computer Science or equivalent, Minimum 5 years professional experience, 4–6 years experience in C++ or 2–3 years in C#, Minimum 5 years experience with Git (branching, merging), Experience with Jira and Confluence, Windows system administration skills, Minimum 2 years unit testing experience, Minimum 2 years experience integrating third-party software, Minimum 1 year experience with CI/CD in Visual Studio, Experience preparing technical specifications and documentation, Experience with Waterfall, V-Model, or Agile/Scrum methodologies 📃 Skills: C++, C#, Git, Jira, Confluence, Windows, CI/CD, VisualStudio, UnitTesting, Scrum, Waterfall, V-Model 🏢 Description: Overview of the Role: The C++ / C# Developer will engage in complex software development and system integration projects, primarily within the enterprise or public-sector domains, driving the delivery of robust, scalable solutions. What we offer: Long Term B2B Contract Remote role Main Responsibilities: Develop, test, and maintain high-quality software solutions. Collaborate with team members for system integration tasks. Contribute to the design and architecture of technical specifications. Participate in reviews and suggest improvements in software coding practices. Document all development processes and updates for project transparency. Ensure adherence to CI/CD practices within Visual Studio environments. Support unit testing and maintain test processes. Integrate third-party software components efficiently. Facilitate knowledge transfer within the team. Assist in troubleshooting and maintaining existing applications. Key Requirements: Fluent in German (C1 level, spoken and written). Proficient in English (minimum B1 level, spoken and written). Bachelor's degree in Computer Science or equivalent with at least 5 years of experience. Extensive knowledge of C++ and/or C# (4-6 years for C++, 2-3 years for C#). Experience with Git (branching, merging) for at least 5 years. Familiarity with Jira and Confluence. Competence in Windows system administration, including terminal and console usage. Hands-on experience with unit testing and test processes (minimum 2 years). Experience integrating third-party software (minimum 2 years, ideally 4 years). Knowledge of CI/CD processes in Visual Studio environments (minimum 1 year). Experience in preparing technical specifications and documentation (minimum 1 year). Exposure to large public sector projects or comparable private sector engagements. Familiarity with various software development models (Waterfall/V-Model, Iterative, Agile/Scrum). Willingness to facilitate knowledge transfer within the team. Nice to Have: Experience in public sector projects such as KONSENS. Background in team leadership or mentoring roles. Knowledge of additional programming languages or technologies. Other Details: The position offers remote working opportunities from Poland with occasional visits to Germany (not exceeding once a quarter). Candidates should be available for up to a month and are expected for long-term cooperation on a 48-month project. A standard business working hour schedule is provided.

🏢 Summary: B2B remote contract for a Senior C++ Developer to design, build, and enhance high-performance trading and backend platforms. The role focuses on developing scalable, performance-critical systems and improving an existing technology stack in an international environment. Requires daily overlap with the New York time zone. 🗂️ Requirements: 5+ years commercial experience with C++, Strong knowledge of object-oriented programming, Strong knowledge of low-level programming concepts, Experience with multithreading, Understanding of concurrency and synchronization, Experience with sockets and networking, Knowledge of event-driven architectures, Experience with Windows native APIs, Understanding of OS internals, Experience debugging memory leaks, race conditions, deadlocks, stack corruption, Experience with unit testing, Experience participating in code reviews, Experience working with databases 📃 Skills: C++, OOP, LowLevel, Multithreading, Concurrency, Synchronization, Sockets, Networking, EventDriven, Windows, WinAPI, OSInternals, Debugging, Databases, UnitTesting 🏢 Description: We are looking for an experienced Senior C++ Developer to join our client’s engineering team and help build and enhance next-generation trading and backend platforms . This is an opportunity to work on highly scalable, performance-critical systems in an international environment where technology plays a central role in modern financial markets. B2B contract – salary range: $45–65/hour (no paid vacation included) 100% remote job 5–6 hours daily overlap with the New York time zone is required Responsibilities: C++ application development Participate in application design and implementation Enhancement of existing technological platform Identification and resolution of security vulnerabilities Development of back-end services Design and write unit tests Participate in code and design reviews Requirements: 5+ years of commercial experience with C++ Strong knowledge of object-oriented and low-level programming concepts Solid understanding of: multithreading concurrency and synchronization sockets and networking event-driven architectures Windows native APIs and OS internals Experience with debugging complex issues such as memory leaks, race conditions, deadlocks, and stack corruption Good understanding of software engineering best practices, including unit testing and code reviews Experience working with databases Strong analytical and problem-solving skills Ability to work independently and collaboratively within international teams Degree in Computer Science or a related field Nice to Have: Experience in the financial industry, especially Fixed Income Knowledge of Python scripting JavaScript experience Understanding of communication protocols and network programming fundamentals

🏢 Summary: The offer is for a C++ Developer to build high-performance, high-reliability mobile network systems within 5G and IoT projects. The role focuses on developing, testing, and maintaining next-generation telecommunications solutions in a Linux environment. You will work in an agile team contributing to advanced network infrastructure and protocol-based systems. 🗂️ Requirements: Minimum 3 years of C++ development experience, Experience in telecommunications industry, preferably mobile networks, Hands-on experience with network protocols and telecommunications standards, Strong experience with Linux development and debugging, Experience with Git version control, Experience creating or managing CMake build configurations, Ability to work in Agile/Scrum environment 📃 Skills: C++, Linux, Git, CMake, 5G, IoT, TCPIP, Scrum, Telecommunications 🏢 Description: Join our team at Sii to work on an exciting project in the telco area. As a C++ Developer, you'll have the opportunity to develop pioneering advancements in 5G technology, IoT solutions, and next-generation network infrastructure. You will be contributing to projects that shape the future of global communication, working alongside top professionals in a dynamic and innovative environment. Be a part of something big and take your career to the next level with us! Your tasks Work as a C++ developer for high-performance and high-reliability mobile network systems and applications Collaborate with cross-functional teams to design, implement, and test new features and functionalities Troubleshoot and debug complex system issues, leveraging your knowledge of telecommunications protocols and standards Participate in code reviews and maintain coding standards, ensuring high-quality and maintainable code Create and/or manage CMake build configurations Work agile to provide high-value contributions as a member of a scrum team Requirements Experience in software development in the telecommunication industry (mobile networks preferred) Prior experience working with network protocols and telecommunications standards Minimum 3 years of experience in C++ development Strong experience with Linux operating systems, including development and debugging Familiarity with version control systems, such as Git, and collaborative development workflows Ability to work effectively in a team environment and communicate complex technical concepts clearly Good command of English (communicative for all work purposes) Fluent Polish required Residing in Poland required What we offer Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022 Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more Comfortable workplace – class A offices or remote work Dozens of fascinating projects for prestigious brands from all over the world PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers Investment in your growth – meetups, webinars, training platform and technology blog – you choose Fantastic atmosphere created by all Sii Power People If you want to work on systems with high operational significance — apply now!

🏢 Summary: The offer is for a C++ Developer role focused on building high-performance and high-reliability mobile network systems in the telecommunications domain. The position involves developing and maintaining solutions related to 5G, IoT, and next-generation network infrastructure within an agile environment. The role includes designing, implementing, testing, and debugging telecom systems using C++ and Linux. 🗂️ Requirements: Minimum 3 years of experience in C++ development, Experience in software development in the telecommunication industry, Experience with mobile network systems, Knowledge of network protocols and telecommunications standards, Strong experience with Linux development and debugging, Experience with Git version control, Experience with CMake build configurations, Fluent Polish, Communicative English, Residence in Poland 📃 Skills: C++, Linux, Git, CMake, 5G, IoT, Telecommunications, Scrum 🏢 Description: Join our team at Sii to work on an exciting project in the telco area. As a C++ Developer, you'll have the opportunity to develop pioneering advancements in 5G technology, IoT solutions, and next-generation network infrastructure. You will be contributing to projects that shape the future of global communication, working alongside top professionals in a dynamic and innovative environment. Be a part of something big and take your career to the next level with us! Your tasks Work as a C++ developer for high-performance and high-reliability mobile network systems and applications Collaborate with cross-functional teams to design, implement, and test new features and functionalities Troubleshoot and debug complex system issues, leveraging your knowledge of telecommunications protocols and standards Participate in code reviews and maintain coding standards, ensuring high-quality and maintainable code Create and/or manage CMake build configurations Work agile to provide high-value contributions as a member of a scrum team Requirements Experience in software development in the telecommunication industry (mobile networks preferred) Prior experience working with network protocols and telecommunications standards Minimum 3 years of experience in C++ development Strong experience with Linux operating systems, including development and debugging Familiarity with version control systems, such as Git, and collaborative development workflows Ability to work effectively in a team environment and communicate complex technical concepts clearly Good command of English (communicative for all work purposes) Fluent Polish required Residing in Poland required What we offer Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022 Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more Comfortable workplace – class A offices or remote work Dozens of fascinating projects for prestigious brands from all over the world PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers Investment in your growth – meetups, webinars, training platform and technology blog – you choose Fantastic atmosphere created by all Sii Power People If you want to work on systems with high operational significance — apply now!

🏢 Summary: The offer is for an experienced C++ Developer to build and maintain network and cloud applications in the healthcare domain. The role involves image processing, streaming, and optimization of existing code within distributed systems. Work includes implementing new features and ensuring high-quality software in a collaborative team environment. 🗂️ Requirements: Commercial experience in C++ programming, Knowledge of relational databases, Knowledge of object-oriented databases, Understanding of HTTP protocol, Understanding of TCP/IP fundamentals, Experience with distributed systems, Experience with static code analysis 📃 Skills: C++, SQL, HTTP, TCP/IP, DistributedSystems, StaticAnalysis, ImageProcessing, Streaming, Cloud 🏢 Description: Miejsce pracy: ul. Ceglana 35, 40-514 Katowice Jesteśmy dynamicznie rozwijającą się firmą technologiczną, która specjalizuje się w tworzeniu zaawansowanych rozwiązań w obszarze aplikacji sieciowych i chmurowych. W związku z rozwojem naszych projektów poszukujemy doświadczonego Developera C++, który dołączy do naszego zespołu. Nasze projekty skoncentrowane są na obszarze Healthcare. Obowiązki : Programowanie aplikacji sieciowych oraz aplikacji chmurowych. Przetwarzanie obrazu i strumieniowe w różnorodnych projektach. Wdrażanie nowych funkcjonalności oraz utrzymanie i optymalizacja istniejącego kodu. Współpraca w ramach zespołu projektowego w celu zapewnienia wysokiej jakości oprogramowania. Wymagania : Doświadczenie w programowaniu w C++. Znajomość baz danych relacyjnych i obiektowych. Dobra znajomość protokołu HTTP i podstaw sieci TCP/IP. Doświadczenie z systemami rozproszonymi mile widziane . Mile widziane doświadczenie ze statyczną analizą kodu. Dodatkowym atutem będzie doświadczenie w tworzeniu aplikacji mobilnych. Oferujemy : Stabilne zatrudnienie w nowoczesnym środowisku pracy Możliwość rozwoju zawodowego i zdobycia doświadczenia w projektach różnego rodzaju Core hours 9:00-15:00 Możliwość zdalnego świadczenia usług, jednak chętnie zobaczymy Cię w biurze 😉 Wynagrodzenie adekwatne do umiejętności i doświadczenia Jak rekrutujemy? Chcemy mieć pewność, że wszyscy kandydaci mają równe szanse, dlatego korzystamy z testu TestGorilla. Chcesz dołączyć do naszego zespołu? Zacznij od kliknięcia w poniższy link. https://app.testgorilla.com/s/9naqdw58 W tym momencie kończymy pierwszy etap rekrutacji. Drugi etap to podsumowująca test techniczna rozmowa online/stacjonarnie trwająca około 1h. Etap trzeci to spotkanie w biurze/online składające się ze swobodnej rozmowy i części negocjacyjnej, gdy już wiemy, że chcemy współpracować.

🏢 Summary: Senior C++ Developer role focused on building and enhancing a high-performance airline retailing and merchandising platform enabling personalized offers and dynamic pricing. The position involves designing and developing modern, cloud-based microservices and critical system components in a real-time, mission-critical environment. The role includes coding, code reviews, performance optimization, and resolving complex production issues. 🗂️ Requirements: 5+ years of hands-on experience with Modern C++, Bachelor’s degree in Computer Science or related field, Experience with cloud deployments, preferably GCP, Experience in building or enhancing microservices, Strong knowledge of data structures and algorithms, Strong understanding of distributed systems and systems architecture, Experience in developing and operating cloud-based applications, Ability to design, code, test, and debug complex systems, Legal work permit in Poland 📃 Skills: C++, GCP, Cloud, Microservices, Algorithms, DataStructures, DistributedSystems, SystemsArchitecture, Linux, Git 🏢 Description: For our client we’re looking for a talented and motivated Senior C++ Developer. The airline retailing and merchandising platform that enables airlines to create personalized offers and dynamic pricing for customers. Team is responsible to deliver modern, omni-channel, real-time retailing shopping experience. Provide reduced cost through consolidation of common components including consolidation of offer management system. This is a unique opportunity to work on a critical and operationally complex high-performance product that also interacts with several of mission critical products. That will help the selected candidate to work on high-performing products as well expose opportunity to other products and enable the candidate to grow in their career. Identifying technical design and clarifies implementation Reviewing code to ensure meet of Definition of Done and collaboratively codes with the team Developing, coding, testing and debugging new moderately complex software solutions or enhancements to existing software in a maintenance capacity Designing and coding critical system components in accordance with established coding standards and guidelines Creating new ideas to improve application performance and stability Working collaboratively with team across geographical locations Resolving customer complaints with software and responding to suggestions for improvements and enhancements Proactively understands business domain knowledge Effectively working in interaction with other Developers, QA and business analysts Being able to work under pressure to investigate and resolve real-time issues Minimum 5+ year of hands-on Modern C++ programming Bachelor's degree in computer science or a related field Experience in Cloud deployments, Preferably in GCP Solid tech background in creating new/or enhancing existing microservices Deep knowledge in functional programming, data structures, algorithms, distributed systems and systems architecture Developing applications for cloud computing, design, maintaining and operating cloud systems/microservices and applications, keep cloud systems secure Fully testing and integrating with all the other products/applications, understand the language of business, and developing to address the business’s needs Travel industry knowledge as the advantage Must possess a legal work permit in Poland General benefits - depends on the form of employment Remote work Referral program with financial bonus Budget for development (including language courses and others), clear career path with the possibility to gain experience in international environment Access to internal Learning Platform with multiple trainings oriented for professional growth Lifestyle benefits: Access to MyBenefit platform (Multisport included) Team Building activities Charity initiatives Working environment promoting diversity and inclusion

🏢 Summary: Offer for a C++ Developer responsible for developing and maintaining software solutions, ensuring high code quality, and participating in continuous integration processes. The role involves creating new functionalities, modifying existing systems, and analyzing, testing, and fixing reported issues. Position is primarily onsite in Poznań with potential hybrid work later. 🗂️ Requirements: Good knowledge of C++, Ability to use Windows or Linux command line (CLI), Basic knowledge of relational databases, Knowledge of SQL, Experience with version control systems SVN or GIT, Residence in Poznań area or willingness to relocate 📃 Skills: C++, SQL, SVN, GIT, CLI, Windows, Linux, RDBMS 🏢 Description: Obecnie poszukujemy dobrze zorganizowanej i dbającej o wysokie standardy pracy osoby, która chciałaby dołączyć do naszego zespołu jako C++ Developer. Zależy nam na osobach, które mieszkają w Poznaniu lub okolicach - bądź są gotowe do relokacji! Jak pracujemy, co dla nas Ważne: Stawiamy na wytwarzanie oprogramowania techniką ciągłej integracji. Stawiamy na bezpośrednią komunikację w zespole. Stawiamy na różnorodność w zespole i postaramy się wykorzystać Twój potencjał. Stawiamy na długotrwałą współpracę. Twój zakres obowiązków: Tworzenie poprawnych, działających programów. Wprowadzanie zmian w istniejących funkcjonalnościach. Dbanie o jakość tworzonych rozwiązań. Analiza, testy i usuwanie zgłaszanych błędów. Wymagania: Dobra znajomość C++. Umiejętność korzystania z powłoki systemowej Windows / Linux (CLI). Podstawowa wiedza na temat relacyjnych baz danych oraz znajomość SQL. Znajomość narzędzi systemu kontroli wersji SVN lub GIT. Mile widziane: Znajomość technologii: Qt, PostgreSQL, Python. Znajomość języka angielskiego. Orientacja w zagadnieniach związanych z branżą energetyczną. Oferujemy: Zatrudnienie na umowę o pracę lub kontrakt B2B Pracę stacjonarna w komfortowym biurze (Poznań, z możliwością pracy hybrydowej w późniejszym okresie Ciekawe projekty branżowe np. SCADA / ADMS dla koncernów energetycznych w Polsce i za zagranicą (TAURON, ENERGA, ENEA, ENEXIS, STEDIN) Rozwój zawodowy – wsparcie merytoryczne całego zespołu oraz zewnętrzne i firmowe szkolenia / warsztaty. Elastyczne godziny pracy (zaczynamy pracę między 7:00 a 9:00) Ubezpieczenie grupowe, dofinansowanie do urlopów wypoczynkowych, prywatnej opieki medycznej i karty Multisport Zapraszamy do aplikowania! Informujemy, że do wybranych kandydatów zostanie przesłany kwestionariusz rekrutacyjny (jako część procesu rekrutacyjnego).

🏢 Summary: Senior C++ Developer role focused on building production-grade commercial software using modern C++ and MFC across the full software development lifecycle. The position involves software design, implementation, testing, code reviews, and performance optimisation in collaboration with an experienced engineering team. The offer includes long-term remote cooperation on a B2B contract. 🗂️ Requirements: Strong commercial experience with modern C++, Experience with MFC, Strong understanding of Object-Oriented Programming, Knowledge of SOLID principles, Experience with Microsoft SQL Server, Experience with query optimisation and execution plan analysis, Experience implementing and maintaining unit tests, Knowledge of software design patterns, Experience with performance profiling and optimisation, Experience delivering production-quality software, Experience working within the SDLC, English level B2/C1 📃 Skills: C++, MFC, SQL, SQLServer, OOP, SOLID, STL, Concurrency, Templates, UnitTesting, SDLC, C#, .NET 🏢 Description: Join an established software development team building production-grade commercial software. As a Senior C++ Developer, you'll work with modern C++ and MFC, contributing across the full software development lifecycle—from design and implementation to testing and delivery. You'll collaborate with experienced engineers, participate in code reviews and technical discussions, and help deliver high-quality software while driving continuous improvement. Requirements Strong commercial experience with modern C++ (C++11 and newer) , including memory management, templates, concurrency, and the C++ Standard Library Experience with MFC (Microsoft Foundation Class Library) Strong understanding of Object-Oriented Programming, including: SOLID principles encapsulation inheritance polymorphism Experience with Microsoft SQL Server, including query optimisation and execution plan analysis Experience implementing and maintaining unit tests across UI, back-end services, and database layers Knowledge of software design patterns Experience with performance profiling and optimisation techniques Experience delivering maintainable, production-quality software in a commercial environment Experience working within the Software Development Life Cycle (SDLC), including code reviews, design discussions, and collaborative delivery English at B2/C1 level Nice to Have Experience with C# Experience with the .NET ecosystem , particularly in cross-language integration or tooling We Offer B2B contract 120–150 PLN/h 100% remote work Long-term cooperation Immediate start Recruitment Process Recruitment screening Interview with the client Final decision

🏢 Summary: Senior C++ Developer role focused on building and maintaining high-performance, cloud-native microservices for an airline retailing and dynamic pricing platform. The position involves developing distributed systems in GCP, ensuring code quality, security, and low-latency performance within a standardized CI/CD environment. This is a hands-on role in a complex, mission-critical product interacting with multiple integrated systems. 🗂️ Requirements: Minimum 5 years of professional experience in C++ development, Strong expertise in modern C++ (11/17), Experience designing and developing C++ microservices, Experience with high-performance distributed systems in GCP, Hands-on experience with gRPC and REST APIs, Experience with GCP Pub/Sub, Knowledge of OAuth2 and JWT, Strong understanding of data structures and algorithms, Experience with multithreading, Experience with Git-based workflows, Experience with CI/CD toolchains (Bazel or Maven), Experience optimizing low-latency applications and memory management, Experience working with containerized environments, Bachelor’s degree in Computer Science or related field, Legal work permit in Poland 📃 Skills: C++, GCP, gRPC, PubSub, REST, JSON, OAuth2, JWT, Git, Bazel, Maven, GoogleTest, Multithreading, Algorithms, Microservices, CICD 🏢 Description: Project Info: For our client we’re looking for a talented and motivated Senior C++ Developer based in Kraków or the surrounding area. The airline retailing and merchandising platform that enables airlines to create personalized offers and dynamic pricing for customers. Team is responsible to deliver modern, omni-channel, real-time retailing shopping experience. Provide reduced cost through consolidation of common components including consolidation of offer management system. This is a unique opportunity to work on a critical and operationally complex high-performance product that also interacts with several of mission critical products. That will help the selected candidate to work on high-performing products as well expose opportunity to other products and enable the candidate to grow in their career. Responsibilities: Accountable to build high-quality, cloud-native software within a standardized CI toolchain Collaboratively codes, tests, and builds services in a shared monorepo environment Performs meaningful unit testing using Google Test Accountable to maintain code quality and ensure cloud systems remain secure and integrated Provides input to story prioritization and leads small development pods or workstreams as needed Supports Technical Product Manager in preparation of requirements for each release Attends scrum ceremonies and updates status in Rally on a daily basis Continuously works with global teams to improve technical practices across time zones Attends release planning meetings and technical reviews Provides implementation coverage and on-call support, including warranty phases Takes a proactive approach to continuous learning and self-guided problem solving Requirements: Minimum 5 years of professional experience as a C++ Developer Designing, coding, and debugging modern C++ microservices Developing and operating high-performance distributed systems in GCP Expertise in: Modern C++ (11/17), Multithreading, and Data Structures Expertise in: gRPC, GCP Pub/Sub, and REST/JSON APIs Understanding of: OAuth2, JWT, and cloud security best practices Solid knowledge of Algorithmic thinking and Distributed Systems Architecture Fluency in Git-based workflows and large-scale CI/CD toolchains (Bazel/Maven) Optimizing low-latency applications and complex memory management Troubleshooting and responding to unexpected events in a containerized environment Translating business needs into technical implementation details for the travel industry Maintaining and enhancing core microservices architecture within a shared codebase Assisting in the development of software technical documentation and CI/CD workflows Bachelor’s degree in Computer Science or a related field Experience collaborating with global, distributed engineering teams Must possess a legal work permit in Poland Benefits: General benefits - depends on the form of employment Hybrid work model – 3 days per week in the office Referral program with financial bonus Budget for development (including language courses and others), clear career path with the possibility to gain experience in international environment Access to internal Learning Platform with multiple trainings oriented for professional growth Lifestyle benefits: Access to MyBenefit platform (Multisport included) Team Building activities Charity initiatives Working environment promoting diversity and inclusion

🏢 Summary: Senior C++ engineer role focused on modernizing multiple legacy C++ products by migrating to Visual Studio 2022 and updating outdated dependencies. The project involves refactoring legacy code, upgrading build pipelines, and ensuring compatibility and stability across eight components. This is a 6‑month remote consulting engagement with possible extension. 🗂️ Requirements: Strong experience with modern and legacy C++, Deep knowledge of Windows development (Win32, DLLs, services, file systems), Hands-on experience with COM and ActiveX, Experience migrating projects from older Visual Studio versions, Strong debugging skills, Refactoring experience in legacy codebases, Experience with MSBuild, Experience with CI/CD pipelines, European Union citizenship, Residence in Poland 📃 Skills: C++, MSVC, VisualStudio, Win32, DLL, COM, ActiveX, MSBuild, CI/CD, Bitbucket, Boost, Solace, LZO, WebSphere, Windows, UNIX 🏢 Description: We are looking for a senior C++ engineer to lead the modernization of multiple legacy C++ products. The project includes upgrading dependencies from legacy MSVC++ Redistributables (2010–2017) to MSVC++ 2022 , ensuring full compatibility with Visual Studio 2022 , modernizing build pipelines, and validating functional stability across 8 components. Project information: Type of project: Consulting Office location: Warszawa Work mode: Remote Budget: 135 PLN net /h - b2b Project length: 6 months with an option for extension Only candidates with citizenship in the European Union and residence in Poland Start date: ASAP (depending on candidate availability) Key Responsibilities Migrate all products to Visual Studio 2022 Remove obsolete C++ runtime dependencies Refactor legacy code for modern toolsets Update CI/CD pipelines (Bitbucket preferred) Validate third-party integrations (Boost, Solace C Driver, LZO, etc.) Fix known issues and support final sign-off Requirements Strong experience in modern & legacy C++ Deep knowledge of Windows development (Win32, DLLs, services, file systems) Hands-on experience with COM / ActiveX Migration experience from older Visual Studio versions Strong debugging and refactoring skills Experience with MSBuild and CI/CD pipelines Nice to have: Solace C Driver (7.x) WebSphere MQ client development Boost-based services LZO compression library Cross-platform builds (Windows & UNIX environments) We offer: Remote working model Full-time job agreement based on b2b Private medical care with dental care (covering 70% of costs) + rehabilitation package. Family package option possible Multisport card (also for an accompanying person) Life insurance