Staff Software Engineer

**Company Description**
Visa is a world leader in payments and technology, with over 259 billion payments transactions flowing safely between consumers, merchants, financial institutions, and government entities in more than 200 countries and territories each year. Our mission is to connect the world through the most innovative, convenient, reliable, and secure payments network, enabling individuals, businesses, and economies to thrive while driven by a common purpose - to uplift everyone, everywhere by being the best way to pay and be paid.

Make an impact with a purpose-driven industry leader. Join us today and experience Life at Visa.
**Job Description** Visa’s Technology Organization** is a community of problem solvers and innovators reshaping the future of commerce. We operate the world’s most sophisticated processing networks capable of handling more than 65k secure transactions a second across 80M merchants, 15k Financial Institutions, and billions of everyday people. While working with us you’ll get to work on complex distributed systems and solve massive scale problems centered on new payment flows, business and data solutions, cyber security, and B2C platforms.

**About the role**

**What you'll get to do**
- You’ll play a key role within your cross functional team, taking responsibility for your services and the technology within them.
- You'll get to work as the Staff Software Engineer in your squad, leading on discussions around technical direction and systems design, as well as mentoring more junior members of the team

**Responsibilities**
- Maintain high standards in code quality, architectural documentation, and collaborative development
- Architect and implement full-stack solutions, including RESTful APIs (Django / FastAPI / Flask) and frontends (React / Angular).
- Integrate advanced LLMs and agent frameworks (GPT-4, Claude, Gemini, Llama, Mistral, LangChain etc) into scalable enterprise systems.
- Implement retrieval-augmented generation (RAG), prompt engineering, and vector database search (Postgres, Chroma).
- Ensure robust prompt evaluation, hallucination detection, and model output validation.
- Build secure connectors for diverse enterprise data sources (databases, OLAP cubes, Hive, MDX).
- Deploy solutions on Azure Cloud, leveraging Azure OpenAI, App Services and Cognitive Search.
- Integrate with Microsoft 365 platforms (Teams, Excel, Outlook, SharePoint, Power BI) and implement SSO, OAuth2, and enterprise authentication.
- Oversee MLOps processes: model lifecycle management, automated testing, monitoring, and auditing using tools like MLflow or Azure ML.
- Mentor and guide junior engineers, foster best practices in code quality, documentation, and team collaboration.
- Stay current with advances in GenAI and contribute to technical strategy.

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

**Qualifications**

Basic Qualifications
- 5+ years of relevant work experience with a Bachelor’s Degree or at least 2 years of work experience with an Advanced degree (e.g. Masters, MBA, JD, MD) or 0 years of work experience with a PhD, OR 8+ years of relevant work experience.

Preferred Qualifications
- Deep expertise in Python and associated AI/ML frameworks.

Strong proficiency in JavaScript/TypeScript and frontend frameworks (React / Angular).
- Proven experience with agentic frameworks (LangChain, LlamaIndex or similar) and vector databases.
- Solid understanding of cloud architectures (Azure preferred), containerization (Docker), and CI/CD pipelines.
- Demonstrated experience integrating with enterprise data platforms and Microsoft 365 ecosystem.
- Hands-on experience in model evaluation and monitoring in production.
- Excellent communication skills; ability to present to technical and non-technical stakeholders.
- Experience leading or mentoring technical teams.

Nice to Have
- Exposure to image and voice AI models; experience integrating audio/image inputs in GenAI apps.
- Familiarity with cloud functions, cost optimization, and scalable architecture.
- Contributions to open-source or GenAI communities.

Why Join Us?
- Opportunity to lead GenAI innovation in a global enterprise technology environment
- Work with cutting-edge tools, platforms, and real-world use cases
- High visibility and autonomy in delivering solutions that drive real business impact
- A collaborative and future-focused team environment at Visa

Competitive compensation and benefits.

**Additional Information**
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 protected veteran status. Visa will also consider for employment qualified applicants with criminal histories in a manner consistent with EEOC guidelines and applicable local law.