Senior C# or ASP.NET Developer | Starszy Programista C# lub ASP.NET

Join Veeam, a pioneering company at the forefront of data and AI trust, dedicated to ensuring organizations understand, secure, and strengthen their data resilience. As an industry leader in data security and management, Veeam is uniquely positioned to enhance the convergence of identity, data, security, and AI risk. With our headquarters in Seattle and a pr…

Veeam is recognized as the Data and AI Trust Company, dedicated to empowering organizations to fully comprehend, secure, and maintain the resilience of their data and AI systems. As a leader in data resilience and security posture management, Veeam is designed for the convergence of identity, data, security, and AI risk management. With its headquarters in Seattle and operations in over 30 countries, Veeam safeguards the data of more than 550,000 customers globally, who rely on Veeam to ensure their business continuity. Join us in our mission to advance fearlessly, fostering growth, learning, and making a significant impact for some of the world's largest brands.About the RoleWe are seeking a skilled C# Developer to join our team, where you will play a pivotal role in enhancing the backend of Veeam Backup for Hypervisors, improving data protection and fostering business resilience.What You'll DoDesign and implement business logic for virtualization products (RHV, Nutanix, Proxmox VE, etc.)Develop new functionalities and enhance existing featuresImplement significant functionalities across various components of the productContribute to the individual development of components and the overall architecture of the product

Join our innovative team at Qualysoft as a Backup Engineer, where you will play a crucial role in safeguarding our clients' data through efficient backup solutions and recovery strategies. We are looking for passionate individuals who excel in technical problem-solving and are eager to contribute to our mission of delivering high-quality IT services.

Join our dynamic team at Qualysoft as a Storage Engineer specializing in SAN & NAS solutions. In this role, you will be instrumental in designing, implementing, and maintaining our storage infrastructure to ensure optimal performance and reliability. You will work closely with cross-functional teams to develop innovative solutions that meet our clients' needs.Your expertise will help us manage and optimize our storage systems, providing critical support for our data management strategies. If you are passionate about storage technologies and eager to contribute to exciting projects, we would love to hear from you!

Join our dynamic team at Alter Solutions as a C++ Engineer! We are looking for innovative and skilled individuals who are passionate about software development and eager to contribute to exciting projects. As a C++ Engineer, you will play a critical role in designing, developing, and maintaining high-performance applications.

Join our dynamic team as a Virtualization Backup Engineer where your expertise in backup solutions will help us optimize and innovate our services. As a French speaker, you will collaborate with a diverse group of professionals to develop and enhance our virtualization backup strategies.

Veeam Software seeks a Senior C# Developer based in Warsaw, Poland. This position centers on enhancing data management and cloud backup products. Collaboration and delivering clear results for clients are core values for the team. Key responsibilities Design and implement features for data management and cloud backup solutions using C# Collaborate with other developers to expand and strengthen product functionality Share ideas and participate in code reviews and team discussions Requirements Extensive hands-on experience with C# development Comfort working as part of a collaborative team Genuine interest in data management and cloud technologies

Veeam Software seeks an experienced C# Developer to join its Warsaw team. This position is designed for professionals who take pride in building dependable, thoughtfully designed software. Role overview The team emphasizes collaboration and values technical excellence. Developers here work together to achieve high-quality outcomes and maintain a supportive environment. What you will do Contribute to the design and development of software using C# Focus on delivering reliable and maintainable solutions Work closely with colleagues to achieve shared goals Requirements Professional experience with C# development Commitment to quality and attention to detail Interest in collaborative problem-solving

About Us At Hitachi Digital Services, we are a pioneering force in the global digital solutions landscape, committed to unlocking the immense potential of our world. Our people-centric approach empowers us to create meaningful change daily—whether it’s shaping future-ready urban spaces, conserving vital natural resources, safeguarding rainforests, or enhancing lives. We believe in the fusion of innovation, technology, and expertise to propel our clients from today’s challenges to tomorrow’s opportunities through the power of acceleration. We value diverse perspectives, experiences, and passions, and do not expect you to meet every requirement. Your unique journey can be an asset to us as we strive for greatness together. The Role Develop and implement new features for .NET applications, ensuring comprehensive documentation for the transfer of master data from various engineering systems to SAP. Provide technical support to users, diagnosing problems and recommending solutions, including enhancements on the SAP side. Oversee and maintain automated software tests to ensure product reliability. Collaborate with beta testers and developers of related software to refine solutions. Enhance existing processes and tools to boost product efficiency and effectiveness. What You’ll Bring In-depth knowledge of the .NET platform and proficiency in C# programming language. Strong familiarity with XML and Excel formats. Expertise in design patterns, particularly MVVM and SOLID principles. Experience with Visual Studio Enterprise, including unit testing and Git. Valuable insights into SAP data structures, function modules, and GUI for master data management. Strong communication skills and a willingness to engage with business stakeholders for requirement analysis and support.

Join our dynamic team at CodeTwo as a C# / ASP.NET Developer! You will have the opportunity to work in beautiful locations such as Wrocław or Jelenia Góra, or even remotely. In this role, you will:Develop new applications and enhance existing software in the CodeTwo ecosystem using Visual Studio, focusing on cloud-based front-end and back-end technologies with ASP.NET and C#.NET.Collaborate within small teams on projects following SCRUM/Agile methodologies, utilizing tools like Azure DevOps.Participate in all software development phases, from concept and analysis to design and implementation.Utilize ASP.NET related technologies such as Blazor, TypeScript, React, Angular, JavaScript, CSS, Less, and C#.NET technologies like WPF, WCF, and WIX.Engage in Azure programming (e.g., Azure Functions, Cosmos DB, Azure SQL, Web Apps, Cloud Services, Mesh, Kubernetes).Write automated tests including unit, integration, and coded UI tests (e.g., Selenium).Create and maintain technical documentation for the software developed.

At Veeam, we are committed to being the Data and AI Trust Company, empowering organizations to secure and comprehend their data and AI assets. As the leading provider in data resilience and security posture management, we are uniquely positioned to address the convergence of identity, data security, and AI risk. With our headquarters in Seattle and a presence in over 30 countries, Veeam proudly protects more than 550,000 customers globally, ensuring their businesses operate smoothly. Join us on our journey as we move forward together, fostering growth, learning, and making a significant impact for some of the world’s most prominent brands.About the RoleWe are seeking a motivated Junior C# Developer to become a key part of our team focused on Veeam Backup and Replication, along with its extensions.What You’ll DoDevelop and design REST APIs for Veeam Backup & Replication.Create new products while providing support for existing features.Engage in individual and team development of components and overall product architecture.Technologies We Use:C#, .Net 10, Windows/Linux, MS SQL, PostgreSQL, Multithreading.

Key Responsibilities• Develop robust software security and data protection solutions of the highest quality.• Conduct thorough research and recommend optimal methods to fulfill business needs.• Analyze existing architecture and legacy code to identify areas for improvement and continuous evolution of the product.• Improve software delivery and quality throughout all stages of the software development lifecycle.• Address and resolve any issues that may arise during the development process.• Collaborate with Support engineers to diagnose and fix reported software issues.• Work efficiently with team members and technical leads with minimal supervision.Essential Qualifications• Minimum of 5 years of experience with C++11 or newer.• Proven experience in client-server application development.• Strong proficiency with Git version control.• Understanding of foundational design principles for scalable applications.• Ability to perform comprehensive unit testing of software components for integration into larger systems.• Experience in independently and proactively leading features through the full development cycle while collaborating with various teams.• Familiarity with design patterns.• Highly organized with exceptional attention to detail.• Eagerness to learn and contribute innovative ideas.• Proficient in spoken and written English.Desirable Qualifications• Knowledge of best practices in cybersecurity.• Experience with Mac systems and Objective-C.• Background in Windows system development (using WinApi), low-level software development, driver development, Boost, and ClickHouse database.• Familiarity with Golang or Rust programming languages.• Understanding of AWS services.

The AES IT team at Alpha Technologies is actively seeking a skilled C# Developer to join our dynamic team. This role is pivotal in server-side application development and the delivery of innovative solutions. The successful candidate will primarily focus on enhancing our algorithmic trading platform, which includes both foundational frameworks and auxiliary systems and tools.As a C# Developer, you will:Engage in C#/.NET application development within a Windows Server environment.Contribute to the development of strategy simulation and back-testing frameworks.Create advanced user interfaces for order entry.Implement automated unit tests and quality assurance regression test suites.Manage configuration and release processes.Analyze and resolve technical problems.Provide third-line support for developed applications.In addition to your primary responsibilities, you will:Deliver software following the complete software development life cycle.Collaborate closely with the AES IT London product development team and front-office personnel.Work in tandem with other IT teams to leverage existing technologies as needed.Develop a comprehensive understanding of key system dependencies.Support and maintain the applications you develop.

Veeam Software seeks a Senior C# Developer in Warsaw, Poland, to work on Microsoft 365 solutions. This role involves building and maintaining software that enhances Veeam’s product offerings. Key responsibilities Design and develop software applications in C# that integrate with Microsoft 365. Maintain and improve existing code to support new features and ongoing enhancements. Collaborate with engineering, product, and QA teams to deliver updates and improvements. Contribute to solutions that address customer needs and refine the user experience. Location This position is based in Warsaw, Poland.

Join our innovative team at inetum2 as a JVM Software Engineer / C Developer. In this role, you will leverage your expertise in Java Virtual Machine (JVM) and C programming to design, develop, and maintain high-quality software solutions.We are looking for someone passionate about technology, who thrives in a collaborative environment and is eager to tackle complex challenges. You will work closely with cross-functional teams to deliver robust applications that meet our clients' needs.

We are seeking a highly skilled and motivated Senior Full Stack Developer proficient in Python 3 and C++. In this role, you will work closely with our engineering and development teams to design, implement, and maintain robust software solutions that meet our clients' needs.Your expertise will help in driving innovation and developing new features while ensuring the performance, quality, and responsiveness of applications.

Join our dynamic Credit eTrading Technology team as a Senior C# Developer, where you will play a pivotal role in the enhancement and maintenance of our CDS pricing and marking application. This critical application supports 80 traders across three regions, enabling them to effectively manage their CDS positions with various tools for live maintenance and support.Key Responsibilities:Develop, test, and implement new functionalities for the CDS pricing and marking application.Collaborate within an agile team environment, ensuring timely delivery of projects.Engage in bug fixing and provide live support to ensure optimal application performance.Work closely with business analysts to identify and address any operational gaps.Partner with the QA team to uphold the highest standards of quality in our deliverables.

Sperasoft seeks a C++ Developer with strong Unreal Engine 4 or 5 skills to join the team building AAA game titles. This remote role is based in Warsaw, Masovian Voivodeship, Poland. Work alongside experienced engineers and contribute to high-profile projects aimed at major gaming platforms. Key responsibilities Design and implement features across gameplay, AI, and engine systems using Unreal Engine 4 or 5. Collaborate with team members from various disciplines throughout the development cycle. Assist with deployment to major platforms and stores such as Sony, Microsoft, and Nintendo. Participate in architectural planning, design new systems and modules, and prototype features. Optimize code for performance to ensure smooth player experiences. Engage in all phases of game development, from early design through to release.

Join Credit Suisse as a VBA / C# .NET Developer and play a pivotal role in designing, implementing, and enhancing our intraday risk solution for the Macro Rates NY Swaps trading desk. This high-profile position focuses on the Photon application, directly impacting our trading team's capacity to manage risk effectively.Your key responsibilities will include:Taking ownership of the Photon intraday risk management application implementation.Understanding and shaping client requirements to align with business objectives.Leading end-to-end development, from drafting technical specifications to final design documents.Providing third-line (development) support to ensure smooth operation.Conducting unit, performance, system integration, and user acceptance testing.Performing code reviews and integrating learnings into future practices.Coordinating tasks with cross-functional teams, including Quality Assurance and Quantitative Analysts.This opportunity is ideal for candidates with a background in VBA looking to enhance their C# skills while contributing to the development of larger systems.