Senior Full Stack Developer

Engineer RoleThis role demands engineers who don't just write code — they design systems, own outcomes, and relentlessly raise the bar on performance, reliability, and security Frontend - React.js, HTML5, CSS3, TypeScript, Redux / Zustand, Webpack / Vite Backend - Node.js, Java Raptor, REST APIs, GraphQL, Microservices Databases - PostgreSQL, MySQL, MongoDB, Redis, ElasticsearchCI/CD & DevOps - Jenkins, GitHub Actions, Docker, Kubernetes Version Control - Git, GitHub / GitLab — branching, PR workflows, release managementAI & ML - LLM API integration, GitHub Copilot, AI-assisted development, prompt engineering Security - OAuth 2.0, JWT, TLS/SSL, PCI-DSS awareness, OWASP Top 10 Observability - Datadog, New RelicKey Responsibilities Frontend Engineering Architect and build performant, accessible, and scalable UI components using React.js with hooks, context, and advanced state management patterns (Redux, Zustand).Drive front-end best practices: component reusability, code splitting, lazy loading, and performance with UX/Design to deliver pixel-perfect, responsive experiences aligned with PayPal's design system Backend Engineering Design and develop high-throughput RESTful and GraphQL APIs using Node.js and Java Raptor in a microservices architecture. Build resilient, fault-tolerant services capable of handling PayPal-scale transaction volumes with low robust error handling, retry logic, circuit breakers, and observability (logging, tracing, alerting).CI/CD & DevOpsOwn the full software delivery lifecycle — from code commit to production deployment using CI/CD pipelines (Jenkins, GitHub Actions, or equivalent).Manage Git workflows: branching strategies, pull request reviews, merge policies, and release tagging. Deploy and manage services on cloud platforms (AWS, GCP, or Azure), leveraging containerization (Docker, Kubernetes).Monitor production systems, respond to incidents, and drive root cause analysis and post-mortems. Scalable Architecture Design distributed systems that are horizontally scalable, highly available, and fault tolerant. Apply best practices in database design — relational (PostgreSQL, MySQL) and NoSQL (MongoDB, Redis) for caching and session management. Drive architectural decisions through design documents, RFCs, and tech specs reviewed across engineering teams. AI Coding & Feature Implementation Leverage AI-assisted development tools (GitHub Copilot, Claude, ChatGPT) to accelerate feature development, code reviews, and AI/ML models and APIs (LLMs, recommendation engines, fraud detection signals) into production intelligent automation for internal tooling, workflows, or customer-facing features using AI APIs and SDKs. Stay current with applied AI trends relevant to FinTech — anomaly detection, natural language interfaces, predictive analytics. Security & Compliance Build with a security-first mindset: OAuth 2.0, JWT, encryption at rest and in transit, PCI-DSS awareness. Conduct and participate in code reviews with a focus on security vulnerabilities, performance bottlenecks, and maintainability.