Sumanta Mukhopadhyay
Verified Expert in Engineering
Software Engineer and Developer
Dubai, United Arab Emirates
Toptal member since May 21, 2026
Sumanta is a principal software engineer and AI infrastructure specialist with over nine years of experience building distributed systems across fintech, regtech, and healthcare. He architects large-scale LLM platforms, including self-hosted vLLM clusters, Amazon Bedrock pipelines, agentic systems with MCP, and RAG at production scale. He has shipped HIPAA-compliant healthcare AI, driven major cloud cost wins, and leads engineering teams of 25+ serving clients across the US, UK, UAE, and India.
Portfolio
Experience
- Python - 10 years
- TypeScript - 8 years
- Docker - 8 years
- Kubernetes - 7 years
- AWS IoT - 5 years
- FastAPI - 5 years
- Claude - 3 years
- LangChain - 2 years
Preferred Environment
Claude, Amazon Bedrock AgentCore, LangChain, Retrieval-augmented Generation (RAG), Kubernetes, Docker, FastAPI, PostgreSQL, Python, TypeScript
The most amazing...
...system I've built is a self-hosted LLM platform on Amazon EKS, powered by vLLM, that extracts structured data from over 500,000 regulatory documents monthly.
Work Experience
Lead Full-stack Developer
Finarb
- Architected and scaled a regulatory document ingestion platform processing over 500,000 documents monthly on Amazon Elastic Kubernetes Service (EKS) with self-hosted vLLM inference and multi-tenant isolation.
- Spearheaded a cross-functional engineering team of 25+ across fintech, regtech, and healthcare AI, owning hiring, technical strategy, architecture reviews, and delivery.
- Reduced LLM inference costs by more than 60% by migrating workloads from managed APIs to self-hosted vLLM clusters on Kubernetes with no degradation in latency.
- Designed a HIPAA-compliant healthcare AI platform for US clients, integrating FHIR data flows, diagnosis-related group (DRG) coding pipelines, and LLM-powered clinical review.
Full-stack Software Engineer
Freelance Clients
- Built production-grade Django and Django REST framework back ends powering SaaS dashboards, internal tools, and customer-facing portals for early-stage startups.
- Delivered more than 20 end-to-end web application projects for international clients across the US, UK, and EU, maintaining a top-rated freelancer reputation.
- Architected PostgreSQL and MongoDB data models for high-throughput applications, including indexing strategies that improved query performance by 5 – 10x on key endpoints.
- Designed and deployed REST APIs consumed by web and mobile clients, integrating Stripe billing, 3rd-party OAuth providers, and transactional email pipelines.
Experience
Regulatory Intelligence Platform | Large-scale Document AI
I designed the platform from scratch, working on the document ingestion and normalization layer, the multi-tenant inference architecture on Kubernetes, the prompt engineering and extraction schemas for diverse regulatory document types, the observability stack, and the cost economics that made self-hosted inference viable at this scale. I also built a token-based metering and Stripe billing layer to productize the API with usage-based pricing.
The platform replaced weeks of manual analyst review with hours of automated, auditable processing, delivering a step-change in throughput while maintaining full data sovereignty and tenant isolation across the business.
Healthcare AI Platform | HIPAA-compliant Clinical Review System
I owned the architecture across data ingestion, secure multi-tenant storage with PHI isolation, LLM orchestration using Amazon Bedrock and Anthropic Claude, and the audit-grade observability and access controls required for HIPAA compliance. I also led the engineering team delivering the mobile-first product surface targeting the US market.
The platform turns a historically manual, expensive review process into a fast, AI-assisted workflow with full traceability, meaningfully changing the unit economics for healthcare clients while staying inside strict compliance boundaries.
Platform Engineering Migration
I designed the target architecture, covering multi-tenant EKS clusters, ingress and TLS termination, Next.js containerization with edge-equivalent caching, observability with Datadog and OpenTelemetry, and a GitHub Actions CI/CD pipeline replicating Vercel's developer experience without the vendor lock-in. I also built the IaC foundation in Terraform and Helm to make the platform reproducible across environments.
The migration delivered significant infrastructure cost savings and unlocked compliance-grade controls that Vercel's managed offering could not provide, while preserving developer velocity for application teams shipping on the platform.
Education
Bachelor's Degree in Computer Science and Engineering
West Bengal University of Technology (WBUT) - Haringhata, India
Skills
Libraries/APIs
React, Node.js, REST APIs, Recharts, Stripe, OpenAI API, Vue, Socket.IO, Google Calendar API, React Testing Library, API Development, Dropbox API, Google Drive API, eBay API, QuickBooks API, React Query, React Router, OpenAPI, SQLAlchemy, Claude API, Stripe Connect, SendGrid API, Twilio API, React Native for Web, WebRTC, PowerPoint API, GraphQL API, LinkedIn API, Xero API, Pydantic, Google API, Playwright, Square API, jQuery, Outlook Mail REST API, PySpark
Tools
Claude, Git, Terraform, Claude Code, n8n, MSBuild, Expo, Webpack, Microsoft Dynamics, Zoom, SendGrid, Zapier, GitHub, Google Sheets, Microsoft Excel, ChatGPT, Amazon EKS, Flyway, RabbitMQ, AWS IAM, AWS Key Management Service (KMS), Amazon ElastiCache, Amazon Elastic Container Registry (ECR), Windsurf, Amazon CloudWatch, Codex, Adobe Experience Design (XD), TanStack Router, Claude Agent SDK, Odoo, MongoDB Atlas, Square Register SDK, AWS Step Functions, Grafana, Jira, Microsoft Power Apps, Microsoft Access, Apache Solr, Firebase Authentication, SMART on FHIR, Microsoft Outlook, Microsoft Power BI, RingCentral, BigQuery, VPN, Sentry, Figma, High-performance Cluster Manager (HPCM), Prefect, Shadcn, Helix, Auth0, Celery, Gitify, GIS, Vitest, Amazon Elastic Container Service (ECS), Shopify Plus, Apache Maven
Languages
Python, TypeScript, C++, Modern JavaScript, SQL, HTML5, Python 3, Go, PHP, Kotlin, GraphQL, CSS, JavaScript, C#, Java, HTML, Snowflake, Swift, C#.NET, Excel VBA, Shopify Liquid, Ruby, C, CSS4, Rust, Solidity, Fortran, Julia
Frameworks
Next.js, Django, PassKit, Laravel, Tailwind CSS, React Native, JSON Web Tokens (JWT), OAuth 2, gRPC, Core Services, .NET, Windows Credential Framework, NestJS, Cypress, Jest, Flutter, LangGraph, Redux, Spring Boot, Angular, Express.js, Flask, Swagger, Payload CMS, Spring Security, Agentic Frameworks, Windows Presentation Foundation (WPF), Spring Microservice, Spring AI, Spring, Ruby on Rails (RoR), Fastify, Remix, Ray, Apache Spark, Alembic, Django REST Framework, Stripes
Paradigms
Agile, HIPAA Compliance, API Architecture, Microservices, Automated Testing, REST, Azure DevOps, Mobile Development, DevOps, Automation, Synthetic Data Generation, Fast Healthcare Interoperability Resources (FHIR), Software Testing, High-performance Computing (HPC), Testing, Model Context Protocol (MCP), Application Architecture, UI Design, UX Design, Continuous Integration (CI), Event-driven Architecture, B2B, Role-based Access Control (RBAC), Object-oriented Design (OOD), Business Intelligence (BI), ETL, Best Practices, Maintainability, Clean Code, Penetration Testing
Platforms
Kubernetes, Docker, Amazon Web Services (AWS), Android, Vercel, Azure, WordPress, Salesforce, Google Cloud Platform (GCP), Apache Kafka, Databricks, AWS Lambda, iOS, Shopify, Firebase, PostHog, LiveKit, Azure Functions, WooCommerce, Microsoft, Microsoft Power Platform, Microsoft Power Automate, SharePoint, Harness, Mobile, Oracle Cloud Infrastructure (OCI), UKG Pro, Twilio, DigitalOcean, Clerk, Telnyx, AWS IoT, AWS NLB, Blockchain, GoHighLevel
Storage
PostgreSQL, MongoDB, MySQL, Datadog, Redis, Databases, Amazon S3 (AWS S3), Amazon Aurora, Database Migration, JSON, Microsoft SQL Server, Google Cloud, Amazon DynamoDB, Data Pipelines, PostgreSQL 10, Data Integration, Master Data Management (MDM), Database Architecture, Distributed Databases, WP Engine, Microsoft Entra ID, MySQLdb, Redis Cache, Elasticsearch, SQLite, ClickHouse, PostGIS
Industry Expertise
Project Management, Telecommunications, Accounting, E-learning, Insurance, Bioinformatics
Other
LangChain, Retrieval-augmented Generation (RAG), FastAPI, Self-managed Kubernetes, Amazon Bedrock AgentCore, APIs, Large Language Models (LLMs), HIPAA, Anthropic, OpenAI, Agentic AI, Healthtech, Android MDM, Real-time Data, Technical Leadership, WebSockets, Arena, Brokerage, Capital Markets, Financial System Implementation, Product Lifecycle Management (PLM), Architecture, Financial Modeling, Forecasting, Solution Architecture, Artificial Intelligence (AI), API Integration, NetSuite, AI Agents, Airtable, Cloudflare, OAuth, RESTFul APIs, Smoke Testing, Full-stack Development, Supabase, API Backwards Compatibility, GitHub Actions, CTO, Full-stack, AWS Cloud Architecture, Gemini API, Vibe Coding, Vite, API Design, API Testing, Back-end, AI Automation, Workflow Automation, Workflow Automation & System Integration, Image Processing, Inventory Management, Product Listings, Prompt Engineering, Lovable, PWA, AI Tools, Troubleshooting, React Components, AI Agent Orchestration, AI Engineering, Agentic AI Systems, Machine Learning, Automations, Workflows, Microsoft 365, AI Integration, DocuSign, Finance, Fintech, Security, Email Automation, Event-driven Systems, PDF, Data Architecture, Scripting, Gemini, Auditing, Documentation, Reporting, Cloud Architecture, Data Engineering, Deep Learning, Engineering Management, SaaS, Team Leadership, Technical Architecture, Backlog Management, Fractional CTO, Vector Stores, Cursor AI, Amazon RDS, Data Science, Geospatial Data, Gradient Boosting, Machine Learning Operations (MLOps), Multi-agent Systems, User Experience (UX), User Flows, User Interface (UI), Integration, Application Modernization, Document Processing, SQL Server, Payment APIs, ACH Payments, Performance Optimization, OutSystems, Cloud Infrastructure, Code Review, Database Optimization, Multi-tenant Architecture, AI-assisted Development, AI-generated Code, Back-end Development, Ruby on Rails, Application Security, Internet of Things (IoT), Software Architecture, Technical Consulting, IT Consulting, Authorization, Web3, Security Architecture, Conversational AI, Bug Fixes, iPhone, Data Extraction, IT Audits, Manual QA, Planning, IT Security, Web Development, Web Security, Headless Commerce, Video Editing, Front-end Development, Responsive UI, Graphic Design, eCommerce, Azure Service Bus, Containers, HPCC Systems, OpenTelemetry, Simulation Orchestration, TimescaleDB, CI/CD Pipelines, ElevenLabs Solutions, Encryption, Server-side Rendering (SSR), RPC, Row-level Security (RLS), Cloud, Production Engineering, Startups, Data Modeling, Marketing Automation, AI Chatbots, Chatbots, Front-end, Compliance, Team Leadership & Supervision, Agentic Coding, AWS Auto Scaling, AI Architecture, System Architecture, Scalability, Software System Architecture Development, System Architecture Design, Make.com, Product Information Management (PIM), Stibo Systems Enterprise Platform (STEP), ServiceNow, CRM, Intuit QuickBooks, Third-party Integration, Accounting Tools, Optimization, Performance, Third-party APIs, Data Accuracy & Reporting, Product Ownership, Coaching, Learning Management Systems (LMS), Social Networks, Training, AI Model Training, Open Source, Software as a Service (SaaS), System Optimization, Multi-tenant SaaS, Customer Data Platform (CDP), Dashboards, Data Analytics, Email, Go-to-market (GTM) Strategy, Banking as a Service (BaaS), Web Applications, Supabase Auth, Security Audits, Real-time Computing, Mobile Apps, Data Privacy, Generative Artificial Intelligence (GenAI), Speech-to-Text (STT), Text-to-Speech (TTS), Hospitality, Prometheus, Communication, LLM Integration, Reports, Financials, Financing, AI Model Integration, Computer Vision, Advertising Technology (Adtech), Games, Design, Excel Expert, Microsoft Dataverse, Data Integrity, Railway, Big Data, Enterprise, Leadership, Solution Engineer, AML, EasyOCR, Qwen, Sitecore, Headless CMS, Cryptography, Mobile App Security, Shopify Customizations, Shopify Theme, RAG Systems, Healthcare Software, Pipelines, User Roles, CSV, Data Processing, Document Parsing, Gmail, Product Management, Coding, Microsoft Azure, Lending, Payments, OpenID Connect (OIDC), Data Visualization, Product Owner, Education Technology (Edtech), Base44, Legal, Dashboard Design, HTTP, LinkedIn, Recruitment, Web Dashboards, Data Security, ELT, Google BigQuery, LLM Agents, Reliability, Mobile Device Management (MDM), Agentic RAG Systems, Debugging, Microsoft Graph API, SMS, Zustand, Webhooks, Make, Rich Communication Services (RCS), Messaging, Authentication, SvelteKit, Bun, Monorepos, Mobile App Development, UI Development, Luxury, Simulation Engines, Simulations, Dagster, Simulation Modeling, Cloudflare Durable Objects, Storybook, Dynamics CRM 365, OpenAI SDK, CMS, Audits, Legal Technology (Legaltech), General Data Protection Regulation (GDPR), HMAC, Infrastructure as Code (IaC), POS, Progressive Web Applications (PWAs), Privacy, HDR Photography, Modernization, Pub/Sub, HTML5 Audio, Low-latency Software, Streaming, HL7, SOC 2, Telemetry, CPaaS, Smart Contracts, Observability, Luxury Goods, SKUs, Agriculture, Resend, GDPR, Square, Monday.com
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