Saurabh Gupta
Verified Expert in Engineering
Architect and Lead Developer
Bengaluru, Karnataka, India
Toptal member since June 29, 2026
Saurabh is a hands-on technical leader and architect with 14 years at Microsoft and Amazon, and two companies he co-founded as CTO. He builds and orchestrates production AI-agent systems — at Microsoft, a multi-agent platform with quality gates and human oversight — alongside deep enterprise Java, API, and distributed-systems architecture, having scaled products to 100,000+ orders/day. Equally at home setting technical strategy as a CTO and shipping production code.
Portfolio
Experience
- Distributed Systems - 10 years
- Software Architecture - 10 years
- Amazon Web Services (AWS) - 8 years
- Java - 7 years
- Technical Leadership - 5 years
- Artificial Intelligence (AI) - 5 years
- Python - 5 years
- Agentic AI - 3 years
Preferred Environment
Amazon Web Services (AWS), Google Cloud, Firebase, Python, Claude Code, Cursor AI, Android, LangChain, AutoGen, Java
The most amazing...
...thing I've built at Microsoft was an AI-agentic system that autonomously investigated security incidents, accelerating incident response times by 1 hour.
Work Experience
Co-founder & CTO
KreditMitra
- Built a WhatsApp-native loan qualification agent using a state machine architecture, routing users across onboarding, document collection, and LLM-based eligibility assessment; conversation history persisted in Firestore for mid-flow resumption.
- Co-designed credit rules with domain experts covering income sufficiency, occupation type, delinquency markers, and document correctness, with structured reasons output for auditability.
- Built an Android native micro-finance app with formal- and alternative-data-based credit underwriting using Experian credit reports, SMS, and behavioral signals.
- Onboarded around 1,000 users through the WhatsApp flow, with around 200 completing full KYC (PAN, Aadhaar, income statements) and LLM-driven loan eligibility end-to-end — validating the agent in production with real applicants.
Senior Software Engineer
Microsoft
- Built a production multi-agent system (AutoGen, nested-chat / agent-as-tool) that autonomously runs first-layer security-incident investigations, cutting incident response time by around 1 hour and reducing analyst triage load.
- Used GPT-4o with prompt-based domain knowledge for rapid adaptability to evolving threats.
- Developed an early internal testing framework for Jupyter Notebooks-based ML experiments before they were deployed in production.
Founder & CTO
Sampann Finance
- Founded Sampann, a financial planning platform aimed at making investing accessible to the masses using AI and automation.
- Designed the full-stack architecture, including the Reach native app and a Firebase and Node.js back end. Implemented 20+ APIs across the entire fintech lifecycle, including onboarding, KYC, banking, financial goals, payments, and fund integration.
- Wrote the core financial planning algorithm with optimization across multiple goals. This included cash flow projection, risk analysis, risk-based return analysis, mutual fund data aggregation and analysis, and multi-goal optimization.
Senior Software Development Engineer, Amazon Pharmacy
Amazon.com
- Led the Amazon Pharmacy software development team and scaled it from 2,000 to 10,000 orders per day.
- Built ML pipeline for pharmaceutical search query intent detection: fine-tuned BERT model for binary classification, feeding confidence scores into Amazon's central search arbitration layer.
- Developed a triplet network (CNN backbone, triplet loss) for duplicate prescription image detection, achieving 98% precision/90% recall, replacing manual pharmacist review.
- Collaborated with product teams to deliver improvements to medicine discovery, pharmacy checkout, and prescription verification workflows.
Software Development Engineer 2, Amazon Pharmacy
Amazon India
- Part of the founding tech team for Amazon Pharmacy India.
- Influenced technical architecture and designed core components, including business workflows, prescription verification lifecycle management, and customer notification experience.
- Led the design and implementation of customer prescription re-consultation with doctors for verification issues, reducing order rejection rates post-verification.
Software Development Engineer 2, SellerFlex WMS
Amazon India
- Scaled WMS processing from 10,000 to 100,000 orders per day.
- Led the re-architecture and data migration of the Inventory Management Service for the SellerFlex product.
- Led the extension of SellerFlex WMS to support the merchant fulfillment network (MFN).
Software Development Engineer 1, SellerFlex WMS
Amazon India
- One of the first 2 developers in the founding team of SellerFlex Warehouse Management System, enabling sellers to leverage Fulfilled by Amazon (FBA) from their own warehouses.
- Led design and implementation of seller performance management, data warehousing, and analytics features.
- Designed and implemented an order management service.
Software Engineer 2, Cloud Bridge
Citrix
- Improved WCCP mode deployment time by approximately 33% by designing and implementing a new configuration UI wizard.
- Participated in the design and implementation of centralized configuration management for multiple WAN optimization and virtualization appliances.
- Participated in the development of an in-house MVC-based JavaScript framework (RDX) for standardizing products across the company.
Software Engineer 1, Cloud Bridge
Citrix
- Implemented REST API (JSON over HTTP) for CloudBridge configuration and reporting, exposing a uniform interface for appliance management.
- Implemented UI for appliance traffic profile monitoring across links, applications, and QoS attributes.
- Contributed heavily to the in-house JQuery/JavaScript-based front-end framework.
Experience
Amazon Pharmacy Duplicate Rx Detection
CrossLedger
https://crossledger.in/I engineered the entire pipeline single-handedly from concept to deployment. The system ingests broker documents via Gmail OAuth discovery or manual uploads, utilizing vision-based LLMs to parse highly variable schemas across multi-page PDFs. To ensure institutional-grade data integrity, I implemented an automated financial cross-validation layer (validating line-item sums against totals and cross-document consistency) to flag and catch extraction errors before data serialization.
Sampann Finance Planner
https://play.google.com/store/apps/details?id=com.sampannI designed the entire front-to-back architecture and built the mobile client single-handedly. Key engineering highlights include authoring a core financial planning algorithm optimized for variable cash flows, integrating 20+ third-party APIs across the fintech lifecycle (including KYC, instant payments, and mutual fund execution layers), and implementing a robust state management strategy to reliably persist and track investment performance against user targets over long periods.
Education
Master's Degree in Electrical Engineering
Indian Institute of Technology (IIT BHU) - Varanasi, India
Skills
Libraries/APIs
REST APIs, Node.js, WhatsApp API, Claude API, Experian, React
Tools
Claude Code, Claude, Amazon Elastic Container Service (ECS), Amazon SageMaker, Amazon Simple Queue Service (SQS), Amazon Simple Notification Service (SNS), AWS Step Functions
Languages
Java, Python, JavaScript, TypeScript, PHP, C++, C#.NET, CSS, SQL, Kotlin
Paradigms
Microservices, Event-driven Design (EDD), Microservices Architecture, UI Design, UX Design, Agile Project Management, Agile Software Development, Role-based Access Control (RBAC), Model Context Protocol (MCP)
Platforms
Amazon Web Services (AWS), Azure, Firebase, Android, Google Cloud Platform (GCP), AWS Lambda, AWS IoT, FlutterFlow, Azure AI Studio, Kubernetes, Vertex AI
Storage
Cloud Firestore, Amazon S3 (AWS S3), MySQL, Data Pipelines, JSON, Azure Cosmos DB, Amazon DynamoDB, Google Cloud, PostgreSQL, Azure Cloud Services
Industry Expertise
Project Management, Healthcare
Frameworks
React Native, Genkit, Agentic Frameworks, AutoGen
Other
Artificial Intelligence (AI), MVC Frameworks, HTTP, Agentic AI, Workflows, Architecture, Technical Leadership, Low Latency, Full-stack, Full-stack Development, API Integration, APIs, Software Architecture, Integration, Mentorship, Performance Optimization, Scalability, System Architecture, Cloud, Back-end, Third-party Integration, AI Agent Orchestration, AI-assisted Development, Distributed Systems, Enterprise Architecture, AI-generated Code, API Design, Software Engineering, Code Review, Scaling, High Code Quality, Infrastructure, Hands-on Implementation, API Management, AWS Cloud Architecture, Cloud Architecture, Solution Architecture, Retrieval-augmented Generation (RAG), Cursor AI, Machine Learning, ChatGPT API, Healthtech, CTO, Data Analytics, Operations, Technical Consulting, eCommerce, Team Leadership, User Experience (UX), Mobile Apps, Compliance, Financial Services, Wealth Management, AI Agents, LLM Integration, Multi-agent Systems, Computer Vision, Dashboards, Large Language Models (LLMs), SaaS, Gemini, Security, Multitenancy, Leadership, Fractional CTO, Fintech, LLM Agents, Agentic Coding, Cross-functional Communication, AI Product Management, Product Planning, Software as a Service (SaaS), AI Automation, Standard Operating Procedures Development, BERT, Convolutional Neural Networks (CNNs), Application State Management, Neural Networks, Credit Underwriting, Kotlin/Native, Azure Blob Storage, Azure Service Bus, Payment APIs, Know Your Customer (KYC), Investments, Search, Bayesian Inference & Modeling, Deep Learning, Online Ordering, Payments, Notifications, Warehouse Management, Data Warehousing, Order Management, Inventory, Orchestration, Gemini API, LangChain, Google Play Store, HL7, Audits, Web Applications, Key Performance Indicators (KPIs), API Gateways, HIPAA, Front-end
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