Darshan Vaghasiya

Java 21 · Spring Boot · Spring Cloud Gateway · Eureka · MongoDB · React · Vite · Docker · Kubernetes · Helm · Terraform · AWS EKS

• Built a React (Vite) storefront with auth, product search, categories, and cart on top of Spring Boot microservices.
• Split the backend into gateway, registry, auth, user, product, category, cart, order, and notification services, each with its own MongoDB database.
• Provisioned AWS with Terraform (VPC, EKS, autoscaler, ALB controller, ECR) and shipped every service with its own Helm chart.

Python · TensorFlow · BigQuery · Dataflow · Kubernetes · Docker · Faiss

• Trained ranking models over video and text features in TensorFlow, scored against held-out watch data.
• Served the model on Kubernetes behind a REST API, holding sub-100ms P95 latency under local load tests.
• Indexed embeddings in Faiss for approximate nearest-neighbour retrieval in under 50ms per query.

Python · PyTorch · Transformers · GCP (GKE, Cloud Storage) · TensorRT

• Fine-tuned a pretrained summarization model on a 100K-sample dataset, evaluated with ROUGE-L scoring.
• Quantized inference to INT8 with TensorRT, cutting benchmark latency and GPU cost by about 40%.
• Compared generated summaries against reference text to tune decoding and prompt settings.

Python · FastAPI · LangChain · Pinecone · Streamlit

• Assembled a document Q&A service on FastAPI and LangChain with Pinecone namespaces per document set.
• Routed queries across OpenAI and Anthropic models with tunable temperature and retrieval depth.
• Scored retrieval against a 30-question eval set, tuning chunk size and top-k against hit rate.

Go · gRPC · Protocol Buffers · YAML

• Replicated a token store across three gRPC servers, committing writes only after a majority of acks.
• Made reads atomic with read-impose-write-all: return the newest timestamp only after writing it back to a quorum.
• Simulated fail-silent replicas (sleeps, negative acks) and kept the system correct with one node silent.

Next.js · TypeScript · Convex · Clerk · OpenAI · Google Maps · Stripe

• Generated trip plans in three parallel LLM batches with JSON-schema function calling, each wrapped in scheduled retries.
• Streamed each section to the browser as it landed through Convex reactive queries.
• Added shared plans with rate-limited email invites, expense tracking, live weather, and payments.

Node.js · TypeScript · Express · Kafka · Kafka Streams · Redis

• Validated device alerts at an Express API and published them to a partitioned Kafka topic.
• Enriched alerts in a Kafka Streams worker with recipients looked up in Redis per builder and building.
• Routed invalid or unroutable alerts to a dead-letter topic with a reason, so bad input never blocks good alerts.

Java · Spring Boot · Spring Cloud · OAuth2 · MongoDB · RabbitMQ · Docker Compose

• Personal-finance backend built on the PiggyMetrics reference architecture: accounts, statistics, and notification services.
• Spring Cloud Config, Eureka discovery, and an API gateway, with an OAuth2 auth server securing service-to-service calls.
• RabbitMQ (Spring Cloud Bus) for config refresh, Hystrix metrics dashboards, and one-command startup with Docker Compose.