Staff Software Engineer

h3Role Description /h3 pThe AI Backend Python Engineer (Staff) will provide technical leadership and define the architecture for backend systems that power the next generation of generative AI applications and large language model /p h3Role Description /h3 pThe AI Backend Python Engineer (Staff) will provide technical leadership and define the architecture for backend systems that power the next generation of generative AI applications and large language model /p p(LLM) integrations. This role focuses on driving strategic technical direction, designing platform-level /p psolutions using Python, FastAPI, and AWS, and influencing engineering practices across the organization. /p h3Key Responsibilities /h3 ul liDefine technical strategy and architecture for Python-based AI backend platforms (on FastAPI) that support LLM integration, generative AI pipelines, and AI agent orchestration /li liArchitect scalable, reliable, and secure systems on AWS infrastructure (Lambda, EKS) that serve as the foundation for multiple teams /li liDrive technical decisions that impact organization-wide engineering practices and platform capabilities /li liDesign and champion AI system observability using LangChain, Langfuse, and litellm /li liEstablish engineering standards for monitoring, logging, observability, and operational excellence across AI backend services /li liLead cross-functional initiatives to optimize performance, security, and scalability of large-scale AI applications /li liMentor and technically guide engineers at all levels, elevating team capabilities through code reviews, architecture reviews, and technical leadership /li liIdentify technical debt, performance bottlenecks, and architectural limitations; drive long-term solutions /li liCollaborate with engineering leadership, product, and other stakeholders to align technical strategy with business objectives /li liInfluence technology choices, design patterns, and best practices across the AI Software Operations department /li liRepresent the team in organization-wide technical discussions and drive adoption of innovative solutions /li /ul h3Basic Qualifications /h3 ul li7+ years of professional software engineering experience with extensive backend and distributed systems expertise /li liDeep expert-level proficiency in Python for building large-scale production systems /li liComprehensive understanding of LLMs, generative AI architectures, and AI infrastructure (LangChain, litellm, Langfuse, OpenAI/Anthropic APIs) /li liProven track record of architecting and delivering complex, scalable platforms on AWS /li liExpert knowledge of microservices architecture, distributed systems design, and event-driven architectures /li liDemonstrated experience with containerization, orchestration (Docker/Kubernetes), and cloud-native patterns /li liStrong history of technical leadership, mentoring engineers, and driving organizational impact /li liBachelor's or Master's degree in Computer Science, Engineering, or related field, or equivalent practical experience /li liExcellent strategic thinking and ability to balance short-term delivery with long-term architectural vision /li /ul h3Preferred Qualifications /h3 ul liExtensive experience designing and building platform-level infrastructure for AI/ML workloads at scale /li liDeep expertise in FastAPI, asynchronous Python, and high-performance backend systems /li liProven track record of architecting event-driven and real-time systems for AI applications /li liExperience influencing engineering culture, establishing best practices, and driving technical standards /li liStrong background in MLOps, model deployment strategies, and AI system reliability /li liExpertise with infrastructure-as-code, CI/CD automation, and platform engineering /li liExperience working with product and business stakeholders to translate requirements into technical strategy /li liHistory of leading cross-functional technical initiatives with measurable organizational impact /li liPublished technical work, open-source contributions, or recognized expertise in AI backend systems /li liExceptional communication and influence skills across all levels of the organization /li /ul pWork location assignment : Remote /p pThis role is posted in multiple locations. If you are applying for the role in an secondary job posting location where pay transparency regulations apply, your Talent Advisor will share the local pay information with you during the first interview. /p pPfizer is an equal opportunity employer and complies with all applicable equal employment opportunity legislation in each jurisdiction in which it operates. /p h3Égalité des chances Emploi /h3 pNous croyons que des équipes diversifiées et inclusives sont essentielles à la réussite d'une entreprise. En tant qu'employeur, Pfizer s'engage à valoriser la diversité et l’inclusion sous toutes ses formes. Cette diversité se reflète également à travers les patients et les communautés que nous servo