🏠Enjoy!!

About me!!

Raju Singh

📞 669-292-9871 | 📧 rajusingh4@gmail.com | 🌐 linkedin.com/in/rajusingh4

Profile Summary

An accomplished professional with 14+ years of experience building scalable, multi-threaded, and high-performance applications, particularly in e-commerce and data-intensive domains. Strong advocate of leveraging AI tools (GitHub Copilot, Continue, internal MCP servers) to accelerate development, improve code quality, and enable rapid experimentation.

Expertise in Java, Spring Boot, Scala, and data engineering pipelines. Skilled in cross-functional collaboration across engineering, product, and research.

Key Accomplishments

  • Developed GraphQL APIs for Apple Online Store, reducing downstream latency and improving data efficiency.
  • Spearheaded Apache Flink-based clean room pipeline at Oportun, enabling sub-50ms response times and reducing Databricks usage costs.
  • Built secure Spring Boot microservices for encrypted PII handling with role-based access control.
  • Refactored Apple’s pricing APIs, enabling modular configuration and 70% faster rollout across global regions.
  • Key contributor to Apple’s Design Studio and New Product Introduction (NPI) projects powering major launches.

Experience

Apple – Software Engineer | Sunnyvale, CA

Jun 2025 – Present

Installments Pricing APIs

  • Designed APIs to expose fine-grained pricing and installment plan metadata for third-party financing.
  • Enabled clear comparison of lifetime costs and terms, integrated with Apple Online Store workflows.

LLM + MCP Developer Platform

  • Built an MCP server powered by LLMs to query 200+ internal services and 12K+ config files in natural language.
  • Supported diffing across environments and enabled faster debugging, enhancing developer productivity by 60%.

Tech: Java 21, Spring Boot, OpenAPI, Docker, Splunk, LLMs, Internal Dev Tools

RedOak Technologies (Contractor to Apple Inc.) – Software Engineer | Sunnyvale, CA

Jan 2024 – May 2025

  • Designed and implemented GraphQL APIs for AI-driven merchandising workflows.
  • Delivered ~35ms latency GraphQL endpoints for real-time pricing and AppleCare integration.

Tech: Java 21, Spring Boot, GraphQL, Docker, Kubernetes

Oportun – Senior Software Engineer | Sunnyvale, CA

Apr 2022 – Nov 2023

Data Sanitization Platform

  • Developed Spring Boot microservices for schema-governed PII sanitization & encryption.
  • Reduced processing time from 100ms to 40ms, supporting 10+ AI/ML teams.

Clean Room System (Apache Flink)

  • Built real-time sandbox pipeline with Kubernetes HA setup, lowering cost by 60%.

Tech: Java 17, Apache Flink, PySpark, Docker, AWS EKS, Databricks

Infosys Ltd – Technology Lead (Contracted to Apple Inc.) | Sunnyvale, CA

Jan 2022 – Mar 2022

  • Refactored pricing logic into modular services, enabling rapid global deployment of pricing changes.

London, UK (Dec 2019 – Dec 2021)

  • Led development for curbside pickup, unified gift cards, and product configuration previews.

Bangalore, India (Apr 2018 – Nov 2019)

  • Built APIs for refurbished and trade-in flows.
  • Redesigned locator and checkout experiences.

Tech: Java 1.8–11, Spring, Hibernate, Mustache, Tomcat, Jenkins, JIRA

Infosys Ltd – Senior Java Developer | Mangalore, India

Jun 2011 – Nov 2014

  • Migrated legacy WebObjects flows to Spring MVC and REST APIs.
  • Enabled Apple Store functionality including instant checkout, locator tools, and payment options.

Infosys Ltd – Trainee | Mysore, India

Dec 2010 – Jun 2011

  • Completed full-time training in Java SE, J2EE, Servlets, JSP, JDBC, SQL, and MVC.
  • Built an enterprise-grade web app using J2EE technologies.