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Job Details
Posted date: Dec 01, 2025
There have been 744 jobs posted with the title of Software Engineer II all time at Microsoft.There have been 744 Software Engineer II jobs posted in the last month.
Category: Software Engineering
Location: Dublin, Dublin
Employment type: Full-Time
Work location type: 0 days / week in-office – remote
Role: Individual Contributor
Description
OverviewAre you passionate about shaping the world of Artificial Intelligence (AI) with state-of-the-art regional and data center networking technologies? Do you dream of connecting countless Graphics Processing Units (GPUs) and Central Processing Units (CPUs) with high-speed network to create the next generation of computing power for every person and every organization around the world? Do you aspire to make the physical network that enables this new level of human civilization accessible, reliable, self-healing, and ubiquitous? If so, this role is the perfect fit for you.
The AHN & AI (Azure Hyperscale Networking and Artificial Intelligence) PhyNet team is on a mission to build & operate the next-generation cloud & AI network, enabling breakthroughs in artificial intelligence by delivering unmatched computational power, scalability and reliability. We design, build & operate cutting-edge infrastructure that supports high-performance AI training model at scale, laying the foundation for innovations that redefine what AI can achieve. This role focuses on developing next-generation networking capabilities to ensure high performance, availability, and minimal jitter for distributed AI workloads. You will play a critical role in enabling state-of-the-art AI systems to achieve their full potential.
As a Software Engineer on the PhyNet Health team, you will play a pivotal role in shaping the next-generation networking infrastructure for Cloud & AI Network. This is a unique opportunity to work at the intersection of hottest fields in technology: Cloud Network and AI. With the explosive growth of generative AI and the increasing demand for large-scale, low-latency systems, this area is at the forefront of innovation and impact. You will work across diverse network architectures and cutting-edge processor and accelerator technologies, driving the design and delivery of a comprehensive, end-to-end solution with a relentless focus on performance, scalability, and observability. If you’re passionate about groundbreaking technology, large-scale systems, and AI infrastructure, join us to build the platform!
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.
Responsibilities
Partner with appropriate stakeholders to determine user requirements for a set of scenarios.Lead identification of dependencies and the development of design documents for a product, application, service, or platform.Leads by example and mentors others to produce extensible and maintainable code used across products.Design, develop, and optimize networking solutions tailored for large-scale AI training infrastructure.Architect and implement high-performance, low-latency, and low-jitter communication frameworks for distributed systems.Benchmark, analyze, and enhance the scalability and reliability of networking systems to handle petabyte-scale data transfer.Debug and resolve complex networking issues in large-scale, high-performance environments.Drive identification of dependencies and the development of design documents for a product, application, service, or platform.Create, implement, optimize, debug, refactor, and reuse code to establish and improve performance and maintainability, effectiveness, and return on investment (ROI).Act as a Designated Responsible Individual (DRI) and guides other engineers by developing and following the playbook, working on call to monitor system/product/service for degradation, downtime, or interruptions.Alerting stakeholders about status and initiates actions to restore system/product/service for simple and complex problems when appropriate.Proactively seek new knowledge and adapts to new AI trends, technical solutions, and patterns that will improve the availability, reliability, efficiency, observability, and performance of products while also driving consistency in monitoring and operations at scale.
Qualifications
Required Qualifications:
Bachelor's Degree in Computer Science or related technical field.Technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python.In-depth understanding of networking protocols (e.g., Ethernet, TCP/IP, RDMA, gRPC) and distributed systems.[MG2.1][SD2.2]Hands-on experience with networking technologies in AI-specific hardware (e.g., InfiniBand, ROCE, NVLink).Other Qualifications:
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 Cloud Background Check upon hire/transfer and every two years thereafter.Preferred Qualifications:
Master's Degree in Computer Science or related technical field.Technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python.Familiarity with network virtualization, software-defined networking (SDN), or network performance tuning.Familiarity with AI accelerators such as GPUs (NVIDIA, AMD) or TPUs, and how they interact with networking infrastructure.Experience with telemetry and observability tools for network monitoring at scale.Background in building scalable and fault-tolerant systems in large, distributed environments.
Benefits/perks listed below may vary depending on the nature of your employment with Microsoft and the country where you work.
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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.
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