Senior .NET Software Engineer (Fullstack) / 1

Inetum Polska is part of the global Inetum Group and plays a key role in driving the digital transformation of businesses and public institutions. Operating in cities such as Warsaw, Poznan, Katowice, Lublin, Rzeszow, Lodz the company offers a wide range of IT services. Inetum Polska actively supports employee development by fully funding training, certifications, and participation in technology conferences. Additionally, the company is involved in local social initiatives, such as charitable projects and promoting an active lifestyle. It prides itself on fostering a diverse and inclusive work environment, ensuring equal opportunities for all. Globally, Inetum operates in 19 countries and employs over 28,000 professionals. The company focuses on four key areas: Consulting (Inetum Consulting): Strategic advisory services that help organizations define and implement innovative solutions. Infrastructure and Application Management (Inetum Technologies): Designing and managing IT systems tailored to clients’ individual needs. Software Implementation (Inetum Solutions): Deploying partner solutions from industry leaders like Microsoft, SAP, Salesforce, and ServiceNow. Custom Software Development (Inetum Software): Creating unique software solutions to meet specific client needs. With strategic partnerships with major technology giants, including Microsoft, SAP, Salesforce, and ServiceNow, Inetum delivers advanced technological solutions tailored to customer requirements. In 2023, Inetum reported revenues of €2.5 billion, underscoring its strong position in the digital services market. Inetum distinguishes itself by offering a comprehensive range of benefits that meet the diverse needs of employees, providing flexibility, support and commitment. Here's what makes working at Inetum unique: Flexible and hybrid work: Flexible working hours. Hybrid work model, allowing employees to divide their time between home and modern offices in key Polish cities. Attractive financial benefits: A cafeteria system that allows employees to personalize benefits by choosing from a variety of options. Generous referral bonuses, offering up to PLN6,000 for referring specialists. Additional revenue sharing opportunities for initiating partnerships with new clients. Professional development and team support: Ongoing guidance from a dedicated Team Manager for each employee. Tailored technical mentoring from an assigned technical leader, depending on individual expertise and project needs. Community and Well-Being: Dedicated team-building budget for online and on-site team events. Opportunities to participate in charitable initiatives and local sports programs. A supportive and inclusive work culture with an emphasis on diversity and mutual respect. We are looking for an experienced Senior .NET Software Engineer (Fullstack) to join our development team. You will play a key role in building and enhancing our internal CRM and workflow management systems, working closely with business stakeholders and contributing to architectural decisions across the entire software lifecycle. Your Responsibilities Active development of our internal, custom CRM and workflow management platforms Contribute to the development, improvement, and optimization of back-end systems Participate in all phases of the software development cycle, including architectural design Identify and implement improvements in quality, performance, and maintainability Conduct code reviews to ensure high software standards Clarify and translate business requirements into technical solutions Project Technology: Backend: .NET Framework 4.8, .NET Core, C#, pure SQL (no ORM), ASP.NET Web API, ASP.NET ASMX Web Services, Redis, Kafka Databases: MS SQL Server, Informix, MySQL Frontend: Angular 17, TypeScript CI/CD & Infrastructure: Strong knowledge of .NET Framework 4.8 and .NET Core Excellent command of C# Solid understanding of relational databases and SQL fundamentals Experience with MS SQL Server, Informix, or MySQL is a plus Experience building and consuming RESTful APIs Experience with SOAP (ASMX) web services Additional Experience Experience in at least one of the following areas will influence assignment to one of our project teams: Frontend development: Angular, TypeScript, Bootstrap, CSS Multithreading & Asynchronous programming Advanced SQL expertise Soft Skills English and Polish level B2 or higher Strong communication skills Willingness to learn the business domain and collaborate closely with non‑technical stakeholders Nice to Have ASP.NET MVC JavaScript Bootstrap & CSS Jenkins