Senior Platform Engineer — Scalable Fintech Payments APIs

Confidential; San Diego (CA); On-site; USD 140,000 - 200,000; Full time

Job summary

Confidential is seeking a Senior Software Engineer for our Platform team to design, build, and maintain core systems that enable our banking integrations and support high-volume payment processing. You will own technical direction for critical components and mentor junior engineers.

You will collaborate with Product, Architecture, and other engineers to deliver secure APIs and reliable platform services, while prioritizing security, performance, and engineering excellence.

Qualifications

• 5+ years in software engineering, with scalable backend and API leadership.
• Experience in commercial payments, fintech or banking domains.
• Strong Java, Spring and containerization expertise.
• Experience designing distributed systems and databases.
• Security-first mindset for financial services.
• Experience with AI coding assistants a plus.
• Excellent debugging, performance tuning, and scale thinking.
• Proven communication and cross-functional collaboration.
• Ability to translate product requirements into robust architecture.

Responsibilities

• Platform Development: Design and implement core platform services, APIs, and infrastructure that support banking integrations and payment processing systems.
• Integration Engineering: Build secure, scalable integrations with major financial institutions and payment networks.
• Code Quality & Best Practices: Write clean, maintainable, and well-tested code while contributing to architectural decisions and technical standards.
• System Reliability: Ensure high availability and performance of platform services with monitoring and incident handling.
• Cross-functional Collaboration: Work with Product, QA, and other Engineering teams to deliver features meeting requirements.
• Technical Innovation: Improve performance, developer experience, tooling, and architecture.

Skills

Java

Spring framework

Containerization

Microservices

Cloud platforms

Security best practices

AI tooling proficiency

Problem solving

Communication & collaboration

API design

Tools

Kubernetes

AWS

GCP

Azure

CI/CD

Job description

Confidential is seeking a Senior Software Engineer for our Platform team to design, build, and maintain core systems that enable our banking integrations and support high-volume payment processing. You will own technical direction for critical components and mentor junior engineers.

You will collaborate with Product, Architecture, and other engineers to deliver secure APIs and reliable platform services, while prioritizing security, performance, and engineering excellence.