**Overview** Security represents the most critical priorities for our customers in a world awash in digital threats, regulatory scrutiny, and estate complexity. Microsoft Security aspires to make the world a safer place for all. We want to reshape security and empower every user, customer, and developer with a security cloud that protects them with end to end, simplified solutions. The Microsoft Security organization accelerates Microsoft’s mission and bold ambitions to ensure that our company and industry is securing digital technology platforms, devices, and clouds in our customers’ heterogeneous environments, as well as ensuring the security of our own internal estate. Our culture is centered on embracing a growth mindset, a theme of inspiring excellence, and encouraging teams and leaders to bring their best each day. In doing so, we create life-changing innovations that impact billions of lives around the world. Attackers attempt to create billions of bot accounts daily on Microsoft platforms to perform phishing, spam and a variety of attacks. Attackers also run International Revenue Share Fraud (IRSF) against any public voice/SMS services. Our team builds both detections and blocking mechanisms against all the above attacks, in particular, focusing on fighting fraud. We constantly investigate the most advanced nation state attacks, and understand the latest techniques deployed by the most sophisticated attackers. We develop detections through training machine learning models, using threat intelligence signals as input, aggregated across entire Internet. We build state of the art machine learning platform for both training, deployment and monitoring. Our machine learning models protect billions of Microsoft users in real-time. With this team, you get a chance to learn new technology in AI, security, and distributed system design. We have experts in all these 3 areas to help you grow. We are looking for Software Development Engineers who is passionate about making an impact in identity protection and anti-fraud. Our team has a strong sense of accountability and provides its members with many opportunities for learning and career growth.  We have exciting opportunities for you to innovate, influence, transform, inspire, and grow within our organization and we encourage you to apply to learn more! Microsoft’s mission is to empower every person and every organization on the planet to achieve more. As employees we come together with a growth mindset, innovate to empower others, and collaborate to realize our shared goals. Each day we build on our values of respect, integrity, and accountability to create a culture of inclusion where everyone can thrive at work and beyond. See what its like to work at Microsoft Ireland at our European Development Centre **Responsibilities** Our team is responsible for the Microsoft's defenses against large scale signup and telecom attacks on Microsoft infrastructure. We leverage signals for a variety of 1P and 3P partners and build highly resilient systems to provide defence in depth against attacks scaling up to a billion requests per day. + Work with Engineers, Product Managers, Designers, and Partners to deliver sets of features with the right overall design and architecture.  + Proficiency in dealing with ambiguity, problem solving and rapid iteration + Own and deliver complete feature areas and large-scale solutions including design, architecture, implementation, testability, debugging, and shipping with secure long term support.  + Write clean well-thought-out code with an emphasis on quality, performance, simplicity, durability, scalability, reusability, and maintainability.  + Be committed to delivering the best experience for our customers and partners, and then iterate based on qualitative and quantitative feedback.  + Help create a diverse and inclusive culture, participating in hiring where appropriate, so everyone can bring their full and authentic self and where we do our best work as a result.  + Take responsibility for reliable uninterrupted operation of features with the earliest detection of issues in production.   + Foster a data driven approach with everything you do from analysing and prioritizing business requirements, including customer feedback, and using metrics to prove success.  + Expose test coverage issues, organize, and implement tests and types of tests needed, and resolve problem areas.  + Gain a working understanding of Microsoft businesses and collaborate with mentors and leaders to contribute to cohesive, end-to-end experiences for our customers and users.  + Participation in an on-call rota. **Qualifications** **Required:** + Bachelor's Degree in Computer Science or related technical field.Software engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, or Python.Ability to deal with ambiguity and understand key business needs in line with competing priorities and apply the right technology and implementation to the solution. Excellent analytical, problem-solving, and debugging skills with a solid understanding of object-oriented design, coding patterns, and testing practices. Strong industry experience collaborating with others on designing, developing, testing, and shipping solutions to large scale technical problems. **Other Requirements:** Ability to meet Microsoft, customer and/or government security screening requirements are required for this role. These requirements include, but are not limited to the following specialized security screenings: Microsoft Cloud Background Check: This position will be required to pass the Microsoft background and Microsoft Cloud background check upon hire/transfer and every two years thereafter. This position will be open for a minimum of 5 days, with applications accepted on an ongoing basis until the position is filled. Microsoft is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to age, ancestry, citizenship, color, family or medical care leave, gender identity or expression, genetic information, immigration status, marital status, medical condition, national origin, physical or mental disability, political affiliation, protected veteran or military status, race, ethnicity, religion, sex (including pregnancy), sexual orientation, or any other characteristic protected by applicable local laws, regulations and ordinances. If you need assistance with religious accommodations and/or a reasonable accommodation due to a disability during the application process, read more about requesting accommodations. (https://careers.microsoft.com/v2/global/en/accessibility.html)