Senior Fullstack Developer

Billennium is a global technology company with over 20 years of experience, committed to innovation and empowering businesses. As an employer, we offer a supportive, growth-focused environment where collaboration and creativity thrive. Join us to shape the future of technology together! We are looking for an experienced Senior Fullstack Developer (C# / Angular) who will join a project for our client in the healthcare industry. Please note: At the beginning, the candidate should be available to work part of their day in alignment with Canadian business hours (-6 hours). Going forward, flexibility to attend meetings and collaborate during shared working hours with the Canadian team will be required. What you will do: Lead the design and development of enterprise applications using C#, .NET, and Angular. Define technical solutions, system architecture, and development best practices. Develop and enhance high-performance APIs, microservices, and SQL-based solutions. Collaborate with stakeholders and mentor developers to deliver robust and scalable software. Maintain and modernize legacy applications while improving performance, security, and DevOps processes. What we are looking for: 12+ years of experience in software development, with strong expertise in C# and .NET technologies. Deep understanding of ASP.NET Framework, Web API, MVC architecture, Windows Services, WinForms, and WCF Services. Solid front-end development experience with Angular and familiarity with maintaining legacy applications built with AngularJS. Strong knowledge of Object-Oriented Design (OOD), software design principles, and design patterns. Hands‑on experience with Entity Framework Core, LINQ, and ORM frameworks. Proven experience with RESTful services and microservices architecture. Strong expertise in SQL Server, database design, query optimization, and performance tuning. Proficiency with Git and modern version control practices. Perks and benefits (our offer): Comprehensive benefits - enjoy Udemy for Business, private medical care, Multisport card, veterinary package, language lessons, and shopping vouchers. Flexibility - adaptable working hours and remote/hybrid work options to suit your lifestyle & location. Career growth - access opportunities for professional development and learning, including perks related to our official partnerships with global IT giants: Microsoft, AWS, Snowflake, Salesforce & more. Global collaboration - work with a diverse, international team. Innovative environment - be part of a forward-thinking and growth-oriented workplace. Engaging community - Work with passionate professionals and participate in team-building events, hackathons, and CSR initiatives to make an impact beyond work. Team-building events including our company tradition (annual company event in Mazury). A pleasant surprise to start your journey with us in the form of a welcome pack. #J-18808-Ljbffr