Priyam Singh

Java Full Stack Developer Intern

JSpiders

Jun 2025 - Jun 2026

Designed and built a middleware-based API rate limiting platform that protects public APIs from abuse and sudden traffic spikes by enforcing configurable per-client quotas before requests reach business services. Designed a middleware interceptor that validates each inbound request against client-specific quotas, blocking over-limit traffic before it reaches downstream services. Maintained thread-safe in-memory request counters to ensure accurate quota tracking under concurrent, high-volume traffic. Embedded live quota metadata (request limit, remaining quota, reset time) into API response headers, enabling clients to self-regulate without additional requests. Load-tested the solution under simulated parallel traffic, validating counter accuracy and consistent enforcement of configured rate limits. Built a backend expense management platform that simplifies group expense tracking by recording shared expenses and calculating the minimum number of settlements required between members. Designed a normalized relational schema for members, groups, expenses, and expense splits to support efficient querying and long-term maintainability. Implemented a balance minimization algorithm that computes each member’s net balance and generates the minimum settlement transactions. Optimized expense summary retrieval by replacing multiple database calls with efficient join queries, improving performance for larger datasets. Secured all REST APIs using JWT-based authentication and authorization, ensuring access only for verified group members.