Senior Software Engineer - Full Stack

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Pay Pal has been revolutionizing commerce globally for more than 25 years, creating innovative experiences that enable the simple, personalized, and secure movement of money, selling, and shopping. The company powers a global two‑sided network that connects hundreds of millions of merchants and consumers, providing proprietary payment solutions, flexible account usage, and a wide range of funding sources including bank accounts, credit cards, cryptocurrencies, and gift cards.

Pay Pal’s core values of Inclusion, Innovation, Collaboration, and Wellness guide its worldwide operations.

As a Senior Full Stack Developer on the Personalization Platform team, you will design and build web applications, tools, and backend services that empower data scientists, ML engineers, and product partners to develop, deploy, and monitor large‑scale personalization systems. You will own end‑to‑end development of high‑quality user interfaces and scalable backend services that support experimentation, feature management, model configuration, insight dashboards, and real‑time personalization workflows.

You will collaborate closely with cross‑functional teams, integrate with feature stores, streaming systems, model registries, and cloud infrastructure, and uphold engineering best practices, performance, and security.

• Deliver complete solutions across all phases of the Software Development Lifecycle—design, implementation, testing, delivery, and operations—based on senior definition guidelines.
• Advise immediate management on project‑level issues and guide junior engineers.
• Operate with little day‑to‑day supervision, making technical decisions grounded in internal conventions and industry best practices.
• Apply knowledge of technical best practices to ensure quality, security, and observability across the stack.

• 3+ years relevant experience and a Bachelor’s degree or an equivalent combination of education and experience.

• Strong proficiency in frontend technologies such as React, Type Script, JavaScript, Redux, or modern UI frameworks.
• Experience building robust backend services using Java, Node.js, Python, or Go.
• Strong understanding of REST APIs, microservices, and distributed systems.
• Experience integrating with cloud environments (GCP, AWS, Azure) and containerized services (Docker, Kubernetes).
• Familiarity with relational and No
  
  SQL databases, caching systems, and data modeling principles.
• Solid understanding of CI/CD, automated testing, observability, and secure software development practices.
• Excellent communication skills, with the ability to translate user needs into technical solutions.

• Experience developing tools that support ML workflows (feature management, model monitoring, dashboards, experimentation tooling).
• Familiarity with data streaming frameworks such as Kafka or Flink and real‑time data processing pipelines.
• Experience with ML model metadata, feature stores, or model registries.
• Understanding of A/B testing methodologies and experimentation dashboards.
• Background building internal developer tools or platform engineering products.

The Consumer Engineering team powers the experiences that millions of Pay Pal customers use every day, designing and building reliable, high‑performance systems that drive trust and simplicity across Pay Pal’s global ecosystem. The team partners closely with product, design, and data science to deliver innovative, customer‑first solutions that advance Pay Pal’s mission to make financial services more accessible, inclusive, and empowering.

The U.S. national annual pay range for this role is $123,500 to $212,850. Actual compensation may include an annual performance bonus, equity, and medical, dental, vision, and other benefits.

Pay Pal provides equal employment opportunity to all persons regardless of age, color, national origin, citizenship status, physical or mental disability, race, religion, creed, gender, sex, pregnancy, sexual orientation, gender identity, genetic information, marital status, or any other characteristic protected by federal, state, or local law. Pay Pal will provide reasonable accommodations for qualified individuals with disabilities.

REQ  R0133780