Senior Full-Stack .NET Developer

At Jacobs, we're challenging today to reinvent tomorrow by solving the world's most critical problems for thriving cities, resilient environments, mission-critical outcomes, operational advancement, scientific discovery and cutting-edge manufacturing, turning abstract ideas into realities that transform the world for good. Your impact As a Senior Full Stack .NET Developer, you will be responsible for designing, developing, and delivering high quality software solutions. You will work across multiple applications and projects, taking ownership of your work, managing priorities independently, and quickly adapting to different technical contexts. You will support teams in applying best practices, ensuring code quality, contributing to architectural discussions, and driving process automation. You will also analyze and enhance existing codebases and support other developers through code reviews and technical guidance. You will collaborate closely with Product Owners, Architects, and Scrum teams. Key Responsibilities Independently manage priorities and deliver work across multiple applications and initiatives Analyze, understand, and enhance existing codebases, including unfamiliar solutions Support other developers through technical guidance, knowledge sharing, and code reviewsSupport the Software Engineering Manager and Solution Architect in defining the shared tech stack and development best practicesAdvise development teams on solution design, technical debt assessment, and continuous process improvementEnsure high code quality through code reviews, standards alignment, and CI/CD pipeline improvementsTranslate business requirements into technical solutionsSupport solution design activities user stories, effort estimation, API design, and architectural decisionsContribute to replatforming and refactoring of existing systemsWork end‑to‑end on new applications (backend + frontend) within the approved .NET stackSupport sprint planning, estimation, and task breakdown for development teamsContribute to DevOps processes, automation of CI/CD, and organization of testing and UATProvide technical guidance, resolve blockers, and mentor other developers Here's what you'll need 5+ years of experience designing and developing C# / .NET solutions in complex environmentsExperience building applications based on API architectures for multiple clients (web, desktop, mobile, plugins)Practical Experience with Blazor, ASP.NET MVC, RazorProven experience with Microsoft Azure (Functions, App Services, Azure SQL, DevOps, CI/CD)Solid expertise in SQL, data modeling, optimization, and query tuningExperience with code quality assurance, advanced debugging, and performance profilingStrong knowledge of Git and modern branching strategiesFamiliarity with Clean Architecture principles, separation of layers, and design patterns (CQRS, Mediator, Repository)Experience working in Agile teams and strong communication skills Nice to have Python for automation tools and integrationsNode.js We offer Rewarding employment Full-time employment with a salary that matches your qualificationsHybrid work model Enjoy the flexibility of working from home, with just several office days per monthComprehensive benefits Including Lux Med medical care, psychological support, life insurance, My Benefit cafeteria system, Multisport card co-financing, and a car/bike park sharing systemCo-financed holidays Enjoy "Wczasy pod Gruszą" for a well-deserved breakGlobal projects Engage in exciting international projectsInclusive networks Join our diverse employee networks like Women's Network, OneWorld, PRISM, Careers Network, Green Team, SpeakUp, Collectively, and moreContinuous learning Participate in our Graduate Development Program, Learners’ Community, and self-learning platformsLanguage courses Enhance your skills with courses in English, German, and Polish We know that if we are inclusive, we’re more connected, and if we are diverse, we’re more creative. We accept people for who they are. Find out more about life at Jacobs. As a Disability Confident employer, we will interview all disabled applicants who meet the criteria for a vacancy. If you require further support or reasonable adjustments with regards to the recruitment process (for example, you require the application form in a different format), please contact the team recruitmentpoland@jacobs.com References Your application experience is important to us, and we’re keen to adapt to make every interaction even better. If you require further support or reasonable adjustments with regards to the recruitment process (for example, you require the application form in a different format), please contact the team via Careers Support.