Farhath Banu

Senior Software Engineer at Postscript

Built and scaled FastAPI-based microservices powering SMS marketing automation, ensuring high throughput and low latency for message delivery and tracking. Collaborated with teams to maintain Go-based core services, designing reliable APIs and integrating customer data pipelines. Implemented LLM-powered SMS generation features using OpenAI and internal fine-tuned models for personalized, brand-aligned messages. Developed the Real-Time Metrics Service (delivery, click-throughs, opt-outs, conversions) using ClickHouse and Redis. Partnered with data engineers to improve segmentation using AI-driven behavior modeling and engagement signals. Contributed to CI/CD pipelines, mentored juniors, and documented internal APIs and AI workflows.

Senior Software Engineer at Klaviyo

Implemented key features for customer needs using Django, ProtoBuf & gRPC services. Designed, implemented, tested and released an RFM (Recency, Frequency and Monetization) feature to understand user behavior. Implemented CMS (CMSService) on gRPC to track real-time data including email/SMS delivery, opens, clicks, etc. Documented API tests and changes for on-demand testing across environments. Mentored junior teammates and supported onboarding. Handled petabyte-scale datasets in ClickHouse with sharding to retrieve customer-specific information. Implemented automated tests and contributed to CI/CD pipelines using Jenkins. Used Redis and PostgreSQL for minimal data storage; Redis for caching and PostgreSQL for relational data.

Responsible for overall technical design, development, modification, and implementation of a Django monolithic application responsible for shipping, fulfillments, and inventory management. Integrated with shipment API to create orders within the MES for fulfillments. Implemented a worker queue to prioritize and distribute product fulfillments. Integrated with Amazon Seller Central for real-time orders and updates to fulfill and track shipments/returns. Developed RESTful APIs for mobile and web clients using Django REST framework. Documented and executed automated tests for API responses. Mentored junior team members and aided onboarding. Managed large data sets in ClickHouse with sharding techniques and created custom auto-scaling solutions for Celery workers and API services using CloudWatch and AWS Lambda. Built a CMS (Content Management System) on RPC services to enable real-time data tracking.