Senior Programmer JAVA & Microsoft Graph API

We are looking for a Senior Java Developer with excellent knowledge of the Microsoft Graph API (Mail, Calendar, Contacts) for a long-term project. You will modernise an existing enterprise application by replacing a legacy Lotus Notes integration with Outlook/Graph and contribute to the development of a new end-to-end insurance platform.Job LocationVienna: At the beginning a high on-site presence, then approx. 50% in the office (hybrid setup)Type of employmentFreelanceStarting date1.1.2026Salaryby agreementJob descriptionMaintain and further develop an existing enterprise application, including replacing the current Lotus Notes integration with an Outlook integration based on Microsoft Graph API (mail, calendar, contacts).Contribute to a large greenfield project for a new, comprehensive insurance solution (design and implementation).Create and implement technical concepts and decision templates in close collaboration with business and IT stakeholders.Implement features and change requests in Java (including unit tests) and ensure code quality and maintainability.Document solutions, interfaces and technical decisions.Take over maintenance and 3rd-level support tasks for existing applications.Work closely with a German-speaking project team and actively participate in workshops and technical discussions.RequirementsVery strong experience with Microsoft Graph API (Mail, Calendar, Contacts)Excellent Java knowledge, ideally including Java Servlet, JSF, SeamSolid experience with REST APIsStrong experience with OData queries (Open Data Protocol) and JSONPractical experience with Eclipse and GitNice to have experience with Lotus/HCL Notes Domino API, experience in the insurance industry or other highly regulated sectorsBenefits• Membership in APM.Digital club - become APM Expert• Beer box for each APM Expert• 100% work from home• Multisport card• Flexible working hours• Tax and social counseling for freelancers• Work with the most modern tools on the market in all areas• Young team, frequent team buildingThe position is suitable for candidates with education:university I. degreeuniversity II. degreeuniversity III. degreeeducation in the field of ITLanguage skills:German: B2+, main project languageEnglish: B2+Number of years of experience:Minimum 5+ years of experience ___ About APM Digital:We are an independent IT project consultancy and outsourcing provider. Based in Slovakia we have a strong footprint in CEE and DACH region. Key information:- APM Digital was founded in 2016 with a single mission: to guide our clients during Digital Transformation and help them to be prepared in the rapidly changing market.- We built strong customer and partnerships networks in EU, with focus on Germany and Austria.- Our activities meanwhile spread also to Slovakia, Czech Republic, Poland, Hungary, India, and United Arab Emirates. What we value:- Since our foundation, we have accomplished to build good relationships and trust with our customers, which are the core attributes we value the most.- We deliver our services with agile to be flexible, transparent to our clients and always work on the top priorities.- We deep dive into your particular business problems and supply you with fresh ideas. Innovate faster with us. Our clients:- Our clients vary from small and medium companies to large corporates across Europe.- Our focus on Germany, Austria and Central Europe allows us to deliver excellent service onsite at the client's location.- We have hands-on expertise in Banking, Utilities, Automotive and Finance. More info on  https://www.apm.digital/