Senior Software Developer Jobs in Foster City, CA

About Us
Visa is a world leader in payments technology, facilitating transactions between consumers, merchants, financial institutions and government entities across more than 200 countries and territories, dedicated to uplifting everyone, everywhere by being the best way to pay and be paid.

At Visa, you'll have the opportunity to create impact at scale — tackling meaningful challenges, growing your skills and seeing your contributions impact lives around the world.

Join Visa and do work that matters – to you, to your community, and to the world. Progress starts with you.

Visa will accept applications for this role until at least 06-30-2026

Job Description

The Cyber Analytics and AI Innovation team is revolutionizing the field of machine learning and artificial intelligence by developing cutting-edge capabilities and tools that empower employees at Visa to develop secure applications with higher productivity. We are a dynamic and innovative team, driven by a passion for AI/ML technology and a commitment to delivering exceptional platforms and services to our business partners at Visa.

Position can sit in either Foster City, CA or Ashburn, VA

We are at the forefront of innovation, developing a suite of cutting-edge, Secure Enterprise AI Applications that are set to redefine the landscape of Gen AI. Our projects include:

• Comprehensive Security Guardrails: Implementing state-of-the-art security measures and protocols to ensure the utmost protection of sensitive data and maintain compliance with global financial regulations. Scalable Enterprise AI Products: Designing and deploying AI-powered solutions that can be seamlessly integrated into various business units, driving efficiency and innovation across the organization.
• Join us in shaping the future of Generative AI at Visa and making a significant impact on the enterprise.
• You will have the opportunity to work across various roles from development to architecture and collaborate closely with a cross-functional team of architects, engineers, data scientists, and product managers to design, implement, and deliver solutions that are intuitive, user-centric, and accessible to everyone at Visa.

This is a hybrid position. Expectation of days in the office will be confirmed by your Hiring Manager.

Qualifications

Basic Qualifications

• 2+ years of relevant work experience and a Bachelors degree OR 5+ years of relevant work experience. Masters graduates must have 2+ years of relevant work experience to qualify.

Preferred Qualifications

• 3 or more years of work experience with a Bachelor’s Degree or more than 2 years of work experience with an Advanced Degree (e.g. Masters, MBA, JD, MD).
• Bachelor’s degree in computer science or a related field.
• Minimum of 3+ years of experience in developing highly available and scalable RESTful services using Python. Experience with Java, Go, Rust or any other object-oriented programming language is a plus.
• 2+ years of experience building and pushing code into production.
• 1+ years of hands-on experience with GenAI technologies — including LLMs, prompt engineering, embeddings, fine-tuning, and AI agents or agentic pipelines.
• Strong software engineering background with experience in Python, PyTorch, TensorFlow, or JAX..
• Hands-on experience with LLMs (e.g., GPT, Claude, Mistral), vector databases (e.g., FAISS, Pinecone), and orchestration tools (e.g., LangChain, LangGraph, Autogen).
• Hands-on experience with design and development tools like IntelliJ, VSCode, Postman, and Jupyter.
• Expertise in evaluating various large language models (LLMs), assessing their performance, and comparing their capabilities to identify suitable models based on business requirements.
• Proven experience in machine learning model fine-tuning and optimization.
• Hands-on experience with AI model APIs and AI agent frameworks.
• Familiarity with the Nvidia ecosystem, including CUDA, and other relevant tools.
• Proficiency in modern backend architectures, including cloud-native development (e.g., AWS, GCP, Azure), containerization (Docker/Kubernetes), and distributed systems.
• Proficiency in working with both RDBMS (preferably MySQL) and NoSQL databases (preferably Cassandra).
• Ability to multi-task in a dynamic and fast paced environment.
• Solid understanding of software development best practices and principles.
• Experience with Agile methodologies and practices.
• Strong analytical and problem-solving skills with attention to detail.
• Excellent communication skills, both written and verbal, to effectively collaborate with cross-functional teams.

U.S. Applicants Only

The estimated salary range for this position is $123,000 to $190,900 USD per year, which may include potential sales incentive payments (if applicable). Salary may vary depending on job-related factors which may include knowledge, skills, experience, and location. In addition, this position may be eligible for bonus and equity.Visa has a comprehensive benefits package for which this position may be eligible that includes Medical, Dental, Vision, 401(k), FSA/HSA, Life Insurance, Paid Time Off, and Wellness Program.

Work Hours

Varies upon the needs of the department.

Travel Requirements

This position requires travel 5-10% of the time.

Mental/Physical Requirements

This position will be performed in an office setting. The position will require the incumbent to sit and stand at a desk, communicate in person and by telephone, frequently operate standard office equipment, such as telephones and computers.

Visa is an EEO Employer

Qualified applicants will receive consideration for employment without regard to race, color religion, sex, national origin, sexual orientation, gender identity, disability or protect veteran status. Visa will also consider for employment qualified applicants with criminal histories in a manner consistent with the EEOC guidelines and applicable local law.