{"id":3097599,"url":"https://alion.io/job/microsoft-senior-software-engineer-79","title":"Senior Software Engineer","company":{"id":18,"name":"Microsoft","domain":"microsoft.com","url":"https://alion.io/company/microsoft","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Eightfold","truth_index":{"grade":"B","score":79,"open_postings":279,"ghost_share":0,"stale_share":0.832,"repost_share":0,"time_to_fill_p50_days":28,"computed_at":"2026-10-22T06:10:10Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Dublin, Ireland"],"countries":["IE"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":77400,"max":130000,"currency":"EUR","period":"year","gross":null,"usd_annual":145817},"salary_estimate":null,"experience_years_min":2,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"GitHub","optional":false},{"name":"Go","optional":false},{"name":"Node JS","optional":false},{"name":"Python","optional":false},{"name":"Rust","optional":false},{"name":"C#","optional":true},{"name":"C++","optional":true},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2026-09-09T14:05:11Z","employer_posted_date":"2026-10-22","last_verified_at":"2026-10-23T04:44:02Z","board_verified":true,"closed_at":null,"days_open":43,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":43},"description":"OverviewSecurity 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.\nAs a part of this role, as a Senior Software Engineer, you will be a part of the Identity for Services (ID4S) Team, part of Microsoft Entra. The mission of this team is to make it hard to get authentication and authorization wrong. We believe the tasks to get authentication and authorization right, actively preventing security incidents, and always being updated for a service should be straightforward and at the same time provide operational insights as part of the platform. As a team, we take meaningful steps daily to achieve our mission supporting developers, security operations, and administrators. Our solution is used across thousands of internal Microsoft services, and several of our components are available as open source on GitHub. Our main authentication SDK is written in .NET, and we focus on building robust, extensible APIs that minimize resource usage while maximizing security and resilience. We also embrace AI-powered workflows to accelerate development and improve efficiency. Our team is enthusiastic about exploring new ways to co-create with AI and leverage it for better engineering outcomes. There are still many challenges for us to solve to deliver on our mission, and to help us we are looking for an experienced Senior Software Engineer who thrives on building seamlessly integrated components running in high-scale services where security, resilience, memory, and performance are daily motivators. You work effectively across a large set of organizations and teams company-wide and operate with a customer-first mindset. As a team, we ensure our solution utilizes minimal resources, scrutinizes allocations, designs APIs to be configuration-driven and extensible, and collects telemetry to provide key insights for effective operations.\nMicrosoft’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.\n#MSFTSecurity, #OAuth, #Authentication, #Authorization\nResponsibilities\nDevelop and maintain authentication and authorization components for various platforms, including .NET (experience with Rust, Java, Golang, Python, Node.JS is a plus).\nCollaborate with cross-functional teams such as leadership teams, product managers, service owners, and platform teams.\nMake data-driven decisions using quantitative and qualitative insights.\nSupport service owners to ensure seamless integration and operational excellence.\nParticipate in code reviews, design discussions, and contribute to the overall improvement of our authentication libraries.\nExplore and apply AI-assisted development practices to improve velocity and quality.\nQualifications\nRequired Qualifications:\nBachelor's Degree in Computer Science or related technical field AND technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience. \nexperience with Distributed Services\nPreffered Qualifications:\nexperience with SDK and/or experience high scale services \nOther Requirements:\nAbility 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.\nUnderstanding of authentication and authorization protocols, including OAuth, OpenID Connect, and SAML\nExperience with .NET\nThis position will be open for a minimum of 5 days, with applications accepted on an ongoing basis until the position is filled.\nSoftware Engineering IC4 - The typical base pay range for this role across Ireland is € 77,400.00 - € 130,000.00 per year. Certain roles may be eligible for benefits and other compensation.\nFind additional benefits and pay information here:\nhttps://careers.microsoft.com/v2/global/en/corporate-pay/ireland-corporate-pay.html\nThis position will be open for a minimum of 5 days, with applications accepted on an ongoing basis until the position is filled.\nMicrosoft 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. 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