Senior Software Engineer, Back End

Senior Software Engineer, Back End Do you love building at the intersection of infrastructure and artificial intelligence? Do you enjoy solving complex distributed systems problems in a fast-paced, collaborative, and iterative environment? At Capital One, you'll be part of a big group of makers, breakers, doers, and disruptors who love to solve real problems.

We are seeking specialized Backend Software Engineers who are passionate about building the engines that power the next generation of AI. As a Software Engineer on the AI Training Platform team, you won’t just be building applications; you will be building the foundational Managed Services, SDKs, and Compute Infrastructure that allow our Data Scientists to train massive models across hundreds of distributed GPUs . You will be on the forefront of driving a major machine learning transformation within Capital One.

What You’ll Do Build the Platform: Design and develop the control plane and managed services that orchestrate complex AI training workloads across large-scale GPU clusters. Empower Data Scientists: Build intuitive SDKs and CLIs that abstract the complexity of distributed computing, allowing data scientists to focus on modeling rather than infrastructure. Master Distributed Systems: Solve hard problems related to job scheduling, resource allocation, and fault tolerance across hundreds of distributed GPUs using tools like Kubernetes and Ray .

Optimize Performance: Debug and optimize the training stack, from the network layer (NCCL, MPI) to the framework level (PyTorch), ensuring high utilization of expensive GPU resources. Collaborate & Innovate: Partner with Machine Learning Engineers to understand their pain points and deliver robust cloud-based solutions. Stay on top of HPC trends, experiment with new orchestration patterns, and mentor others in the engineering community.

Tech Stack: Utilize programming languages like Python, Go, and C++ , alongside Container Orchestration services ( Docker, Kubernetes ), GPU hardware (Nvidia), and AWS cloud infrastructure. Basic Qualifications: Bachelor’s Degree At least 3 years of professional software engineering experience (Internship experience does not apply) Preferred Qualifications: 5+ years of experience in at least one of the following: Java, Scala, Python, Go, or Node.js 1+ years of experience with AWS, GCP, Azure, or another cloud service 3+ years of experience in open source frameworks, especially those for distributed computing and training LLMs (e.g. Kubeflow Training Operator, Ray, PyTorch) 1+ years of experience building monitoring for high-throughput systems (Prometheus, Grafana, DCGM) to track GPU utilization and training metrics.

1+ years of experience managing or developing against NVIDIA GPU clusters (A100/H100), including knowledge of CUDA, NCCL, or NVLink. 2+ years of experience in Agile practices At this time, Capital One will not sponsor a new applicant for employment authorization, or offer any immigration related support for this position (i.e. H1B, F-1 OPT, F-1 STEM OPT, F-1 CPT, J-1, TN, E-2, E-3, L-1 and O-1, or any EADs or other forms of work authorization that require immigration support from an employer).

The minimum and maximum full-time annual salaries for this role are listed below, by location. Please note that this salary information is solely for candidates hired to perform work within one of these locations, and refers to the amount Capital One is willing to pay at the time of this posting. Salaries for part-time roles will be prorated based upon the agreed upon number of hours to be regularly worked.

McLean, VA: $161,800 - $184,600 for Senior Software Engineer New York, NY: $176,500 - $201,400 for Senior Software Engineer Candidates hired to work in other locations will be subject to the pay range associated with that location, and the actual annualized salary amount offered to any candidate at the time of hire will be reflected solely in the candidate’s offer letter. This role is also eligible to earn performance based incentive compensation, which may include cash bonus(es) and/or long term incentives (LTI). Incentives could be discretionary or non discretionary depending on the plan.

Capital One offers a comprehensive, competitive, and inclusive set of health, financial and other benefits that support your total well-being. Learn more at the Capital One Careers website . Eligibility varies based on full or part-time status, exempt or non-exempt status, and management level.

This role is expected to accept applications for a minimum of 5 business days. No agencies please. Capital One is an equal opportunity employer (EOE, including disability/vet) committed to non-discrimination in compliance with applicable federal, state, and local laws.

Capital One promotes a drug-free workplace. Capital One will consider for employment qualified applicants with a criminal history in a manner consistent with the requirements of applicable laws regarding criminal background inquiries, including, to the extent applicable, Article 23-A of the New York Correction Law; San Francisco, California Police Code Article 49, Sections 4901-4920; New York City’s Fair Chance Act; Philadelphia’s Fair Criminal Records Screening Act; and other applicable federal, state, and local laws and regulations regarding criminal background inquiries. If you have visited our website in search of information on employment opportunities or to apply for a position, and you require an accommodation, please contact Capital One Recruiting at 1-800-304-9102 or via email at RecruitingAccommodation@capitalone.com .

All information you provide will be kept confidential and will be used only to the extent required to provide needed reasonable accommodations. For technical support or questions about Capital One's recruiting process, please send an email to Careers@capitalone.com Capital One does not provide, endorse nor guarantee and is not liable for third-party products, services, educational tools or other information available through this site. Capital One Financial is made up of several different entities.

Please note that any position posted in Canada is for Capital One Canada, any position posted in the United Kingdom is for Capital One Europe and any position posted in the Philippines is for Capital One Philippines Service Corp. (COPSSC).