.Net 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 a .NET Developer to join our team and support the development of advanced digital solutions for a global client from the life sciences industry. In this role, you will contribute to the development of a secure platform supporting scientific and diagnostic processes. You will work on backend applications responsible for managing and processing business-critical data in a regulated environment, collaborating with experienced engineers and contributing to high-quality software solutions. What you will do Develop and maintain backend applications using .NET technologiesImplement new features and improve existing functionalities following Domain-Driven Design (DDD) principlesBuild and maintain Web APIs and GraphQL-based servicesCreate and maintain unit and integration testsSupport application upgrades and modernization initiativesAnalyze and estimate development tasksParticipate in code reviews and contribute to improving code qualityCollaborate with developers, testers, and business stakeholders in an Agile environmentTroubleshoot issues and optimize application performance What we are looking for 3+ years of commercial experience in .NET developmentStrong knowledge of C#, .NET Core/.NET 7, and ASP.NET CoreExperience developing backend applications and REST APIsKnowledge of GraphQL, including working with queries and mutationsExperience with SQL Server and relational databasesPractical experience with unit and integration testingFamiliarity with MSTest, NSubstitute, or similar testing frameworksUnderstanding of Dependency Injection and ASP.NET Core fundamentalsBasic knowledge of Authentication and Authorization mechanismsExperience working with GitFamiliarity with AWS services, ideally Amazon S3Experience working in Agile teamsGood analytical and problem-solving skillsGood communication skills and proactive attitudeFluent English Nice to have Experience with Domain-Driven Design (DDD)Experience with GraphQL subscriptionsExperience in healthcare, life sciences, pharmaceutical, or other regulated industriesFamiliarity with CI/CD practices Perks and benefits (our offer) Comprehensive benefits – enjoy Udemy for Business, private medical care, Multisport card, veterinary package, language lessons, and shopping vouchersFlexibility – adaptable working hours and remote/hybrid work optionsCareer growth – development opportunities and access to training within partnerships with Microsoft, AWS, Snowflake, Salesforce & moreGlobal collaboration – work with an international teamInnovative environment – contribute to impactful solutions supporting the life sciences industryEngaging community – team-building events, CSR initiatives, and hackathonsAnnual company event in MazuryWelcome pack to kick off your journey with us Tech Stack: C#, .NET 7, .NET Core, ASP.NET Core, Web API, GraphQL, SQL Server, MSTest, NSubstitute, Domain-Driven Design (DDD), Integration Testing, Dependency Injection, Authentication & Authorization, Amazon S3, Git, Agile.