Hari Sankar
Verified Expert in Engineering
Full-stack Engineer and Developer
Sivakasi, Tamil Nadu, India
Toptal member since August 28, 2026
Hari is a full-stack engineer with 4 years of experience building products that shrink cycle times and replace manual ops with reliable automation for SaaS, proptech, and fintech clients. He designs compliance-ready systems that scale—adding AI only where it clearly cuts cost, errors, and time-to-decision.
Portfolio
Experience
- Python - 4 years
- Full-stack - 4 years
- Next.js - 4 years
- TypeScript - 4 years
- Automation - 4 years
- n8n - 3 years
- Compliance - 3 years
- AI Agents - 3 years
Work Experience
Senior Full-stack Automation & AI Architect
Self-employed
- Architected and built an AI CRM on AWS for a startup-accelerator program: an LLM agent brain over n8n automation, replacing 5 disconnected operations tools and backing the business with operational SLAs, 38 CloudWatch alarms, and runbooks.
- Shipped a consumer fitness platform with Vertex AI meal recognition—an async scan-to-log pipeline that cut nutrition logging from minutes to seconds, removing the top reason users abandon tracking, and launched on iOS and Android.
- Engineered a consumer IoT plant-health platform on AWS IoT—a live soil, light, and moisture telemetry with AI diagnostics, supporting a multi-sensor hardware launch across 12,000+ plant species profiles.
- Deployed 24/7 AI voice and chat leasing agents for a property-management operator—6 integrated tools handling pricing, availability, lead capture, and viewing bookings without after-hours leasing staff.
- Built customer-feedback intelligence for CX and product teams—the AI clustering of reviews and support tickets into ranked recurring themes with root-cause hypotheses, shrinking manual synthesis from days to hours.
- Architected cross-client workflow automation with n8n and LLM agents—voice, chat, and outreach pipelines that automated roughly 80% of routine inquiries and eliminated 100+ manual ops hours monthly across engagements.
- Built an AI operations agent on AWS Bedrock for a security operator, unifying scheduling, accounting, email, and CRM behind a single chat interface, with inference region-locked to Australia so customer data never left the country.
- Engineered the event pipeline behind an eCommerce profit analytics product on HMAC-verified webhooks into Amazon SQS with Lambda workers, reconciling store sales and ad spend on delivery instead of on a polling schedule.
Security Compliance Consultant
MedServe
- Led SOC 2 readiness for a healthcare software platform, running the security gap analysis end to end and driving remediation of every finding through to an audit-ready control set.
- Assessed Azure infrastructure against SOC 2 and HITRUST CSF requirements, then hardened configuration and access controls to close the gaps the assessment surfaced.
- Established encryption standards for data at rest and in transit, and verified enforcement in the live environment rather than accepting the documented policy as evidence.
- Authored the company's information security policy set covering access control, incident response, change management and vendor risk, and mapped each policy to its SOC 2 criteria.
Software Engineer
Mr Cooper
- Led a 5-person pod delivering a federated LOS spanning lead intake through clear-to-close—unifying pipeline, KYC, pricing/lock, and underwriting milestones, and cutting cycle time by 30% on an $8+ billion portfolio.
- Built AI-powered document intelligence that cleared underwriting conditions, reconciled collateral valuation, and closed TRID/investor compliance exceptions. Cut 70% of manual touchpoints, saved $1.2 million annually, and quadrupled funded capacity.
- Created a multitenant white-label platform letting correspondent and 3rd-party lenders deploy foreclosure, servicing, and default AI workflows—turning internal loan-manufacturing automation into a partner revenue channel.
- Built an AI compliance copilot for loan officers—RAG over investor overlays, agency rules, and active loan files with document preview—shrinking onboarding time and accelerating condition-to-clear while lowering operations rework cost.
Freelance Software Developer
Independent
- Led delivery sprints on a unified mobile business hub—caller ID, calendar, tasks, WhatsApp, and messaging in one app—so small operators ran daily work without switching tools.
- Built a recommendation engine for a Telegram creator cross-promotion network—NestJS and Azure Workflows matching channel admins to aligned partners—making audience growth targeted instead of random.
- Owned payments and identity for an AI-native restaurant POS—full Stripe checkout lifecycle and Cognito authentication—so operators could launch QR contactless ordering and collect first revenue same-day.
Project History
Startup Accelerator CRM & Automation Platform (BITS)
https://portal.bits4startups.comKey Contributions:
• Architected dual-face CRM and customer portal on React 19, Node.js/Express, PostgreSQL, Redis, and AWS ECS—5-role RBAC and SLA workflows replacing 5 disconnected operations tools.
• Built 15+ live n8n workflows ingesting email, WhatsApp, LinkedIn, and calendar into lead, contract, and AI-personalized outreach pipelines.
• Delivered Electron desktop reminders plus Hermes, an AI assistant on live program data.
• Production baseline: around 13,900 daily API requests at 99.68% success across 416,000+ monthly requests with dual-path alerting.
BITS became the single system of record from first lead through signed contract, cloud usage, and member support.
GSK Properties – AI Voice & Chat Leasing Agents
https://gskproperties.caKEY CONTRIBUTIONS
• Deployed per-property Retell AI voice and chat agents with 6 custom tools—search, availability, lead capture, rental applications, maintenance intake, and viewing booking—wired to Sanity CMS and a third-party scheduling API.
• Built the orchestration layer so prospects get pricing, submit applications, and book tours 24/7 without leasing staff on nights and weekends.
• Structured agent flows for real rental operations: property-specific knowledge, lead handoff, and booking confirmation rather than generic FAQ bots.
The system replaced repetitive leasing desk work with an always-on digital front line while keeping humans on high-intent viewings and applications.
Dropzon – Shopify Profit Analytics SaaS
https://dropzon.ioKEY CONTRIBUTIONS
• Designed a profit-analytics SaaS syncing Shopify orders and Meta Ads spend into per-SKU margin and ROAS views, answering which products actually make money after paid social.
• Implemented HMAC-verified Shopify webhooks, GDPR data-request/redact flows, competitor tracking, and a subscription academy on Next.js, Django REST, MongoDB, Redis, and AWS SQS/Lambda.
• Owned the full merchant lifecycle—OAuth, catalog sync, ad account linkage, dashboard rendering, and webhook replay safety for operators scaling Meta spend daily.
Dropzon turned delayed spreadsheet math into same-day merchandising decisions for operators running paid social at volume.
FittyMe – AI Meal-recognition Fitness App
https://apps.apple.com/in/app/fittyme/id6757688294KEY CONTRIBUTIONS
• Shipped Flutter client (Riverpod, Supabase auth, Razorpay/PayPal, Apple Health sync) and FastAPI back end on AWS with multi-currency subscriptions, studio bookings, streaks, and personalized goal engines.
• Built async Vertex AI meal-recognition over WebSockets—job queue, retry logic, and confirmed meal logging—cutting nutrition capture from minutes to seconds.
• Owned recognition audit trails, deployment automation, and production hardening from photo capture through timeline update and analytics confirmation.
FittyMe removed the primary drop-off in calorie tracking and delivered a production consumer app end-to-end, not a demo model.
CxPlus AI – Customer Feedback Intelligence
https://cxplus.aiKEY CONTRIBUTIONS
• Designed a modular microservices CX analytics platform aggregating reviews from Trustpilot, Google Reviews, G2, and Google Play with automated scraping, scheduled ingestion workflows, and real-time support-platform integrations.
• Built sentiment analysis and topic-extraction pipelines that turn raw reviews into ranked themes, representative complaints, and actionable insights on a unified dashboard—not vanity sentiment scores.
• Implemented alerting, scalable job orchestration, and service boundaries so new review sources and support tools could plug in without rewriting the core analytics path.
CxPlus replaced fragmented, channel-by-channel reading with a single operational view—surfacing what customers keep saying and where product and support should act next.
memgit – Version Control for AI Memory (Open Source)
https://memgit.devKEY CONTRIBUTIONS
• Architected "git for AI memory," a Python CLI + MCP server storing typed mnemonics with BM25 search, checkpoints, supersession, and project scoping—dogfooded across 2,600+ operational memories in live engineering work.
• Shipped multichannel distribution on PyPI, npm (memgit-mcp), Homebrew, Chocolatey, VS Code Marketplace, and Claude Code plugin; built memgit.dev and an E2E-encrypted team-sync cloud layer on Azure Container Apps.
• Designed MCP-native hooks and tools for Claude Code, Cursor, and VS Code, so agents resume, recall, and save durable context without reloading entire instruction files every session.
memgit turned fragile chat history into versioned, agent-addressable engineering memory—local-first, MIT-licensed, and the context layer this workspace runs on daily.
ClutchX — Venue & Event Booking Marketplace
https://apps.apple.com/in/app/clutchx-find-your-people/id6754336658I worked across the stack. The back end consists of six Java Spring Boot services (gateway, auth, booking, payment, notification, file) registered with Eureka, on MongoDB, with Redis streams carrying notification events, and Razorpay for payments. The Flutter app handles browsing, slot selection, and checkout, with a WebSocket layer for live availability and in-app chat. I also built parts of the React admin console used for venues, pricing, and community moderation.
Education
Bachelor's Degree in Information Technology
Mepco Schlenk Engineering College - Sivakasi, Tamil Nadu, India
Certifications
Google Cloud Certified — Associate Cloud Engineer
Google Cloud
Microsoft Certified: Azure Developer Associate
Microsoft
Nanodegree in Machine Learning and AI technology
Udacity
Skills
Libraries/APIs
React, Node.js, WebRTC, REST APIs, Claude API, Playwright, Stripe, Stripe API, Pydantic, Shopify API, Drizzle, OpenAI API, SQLAlchemy, Entity Framework, HubSpot API, Facebook SDK, QuickBooks API
Tools
n8n, Claude Code, Vitest, Terraform, Claude, Codex, Celery, Drizzle ORM, Pytest, Shopify Plus, GitLab CI/CD, Sentry, Visual Studio App Center, Visual Studio, ChatGPT, BigQuery, Amazon Cognito, Amazon Elastic Container Service (ECS), Expo, Splunk, AI SDK, Confluence, Okapi BM25, Amazon Simple Queue Service (SQS), Retell AI, Azure App Service, Azure Key Vault
Languages
C#, JavaScript, TypeScript, Python, SQL, Java, CSS, HTML, C++, CSS3, HTML5, Go, C#.NET, Dart
Frameworks
.NET Core, Django, Flask, Next.js, .NET, ASP.NET, Spring Boot, Tailwind CSS, OAuth 2, Payload CMS, Spring Microservice, Serverless Framework, Swagger, React Native, Flutter, Express.js, Electron, LangGraph, Cypress, NestJS, Blazor
Paradigms
Automation, Microservices, Model Context Protocol (MCP), Microfrontends, Clean Code, Microservices Architecture, API Architecture, Mobile Development, Event-driven Architecture, Web Application Architecture, Best Practices, Role-based Access Control (RBAC), Testing, Search Engine Optimization (SEO), DevOps
Platforms
Azure, Google Cloud Platform (GCP), Amazon Web Services (AWS), Docker, AWS Lambda, Shopify, Firebase, Kubernetes, Vercel, Twilio, SharePoint, Visual Studio Code (VS Code), Harness, iOS, Replit, HubSpot, Databricks, Rancher, Apache Kafka, Vertex AI, Sanity Studio, Azure Functions, Cloud Run, Amazon EC2
Storage
PostgreSQL, Databases, Google Cloud SQL, Amazon DynamoDB, Neo4j, NoSQL, Database Migration, Amazon S3 (AWS S3), Redis, MongoDB, Microsoft Entra ID
Industry Expertise
Insurance
Other
AI Agents, Full-stack, Back-end, Workflow Automation, Supabase, API Integration, Large Language Models (LLMs), API Design, APIs, Agentic Coding, Full-stack Development, Software Architecture, Push Notifications, SOC 2, Security, RESTFul APIs, RESTful Microservices, AI Tools, Open Source, Browsers, Browser Automation, Web Development, Bots, Solution Architecture, Agentic AI, CRM, Integrations, Agentic Workflow Design, Front-end, Integration, User Interface (UI), Workflow Automation & System Integration, Finance, SaaS, Software as a Service (SaaS), Artificial Intelligence (AI), Retrieval-augmented Generation (RAG), AI-assisted Development, AI-generated Code, Technical Writing, Bug Fixes, Cloudflare, CMS, Accessibility, WCAG 2, User Experience (UX), AI Integration, Vite, AI Governance, Auditing, Chromium, Railway, OpenAI, SQLModel, CI/CD Pipelines, Architecture, Cloud Architecture, Orchestration, LLM Agents, Supabase Auth, Third-party APIs, Third-party Integration, CRM APIs, AI Engineering, Software Engineering, Component-based Architecture, Web App Development, Marketplaces, Minimum Viable Product (MVP), Cursor AI, OAuth, SDK Development, Front-end Development, Personally Identifiable Information (PII), Multi-tenant Architecture, Progressive Web Applications (PWAs), Multi-tenant SaaS, Mobile First, Fintech, Google Cloud Platform, Pipelines, Row-level Security (RLS), Serverless, Anthropic, Back-end Development, Software Development, Software Development Lifecycle (SDLC), Generative Artificial Intelligence (GenAI), ChatGPT API, Prompt Engineering, Vertex, Data Analysis, Vector Databases, Amazon RDS, Code Review, WebSockets, FastAPI, AI Voice Agents, Monitoring, Compliance, Machine Learning, Multi-agent Systems, AI Chatbots, Web Scraping, Mobile App Development, Web Application Design, Devin, APNs, Billing, Caching, Conflict Resolution, Synchronization, LangChain, Technical Leadership, Search Engines, Amazon Bedrock, Internet of Things (IoT), Financial Data, Quantitative Analysis, Financial Modeling, Quantitative Finance, Quantitative Modeling, Infrastructure as Code (IaC), Incident Response, Cloud, Algorithms, Reinforcement Learning, Deep Learning, Time Series Analysis, Optimization Algorithms, Analytics, Sentiment Analysis, VS Code Extensio, Razorpay, Azure Container Registry, Blob Storage, GCP Compute, Cloud Storage, Identity & Access Management (IAM), Virtual Private Cloud (VPC), Cloud Pub/Sub, Google Cloud Functions, Monitoring & Logging, Storybook, SOC 1, HITRUST Certification, Access Control, Encryption, Audit Readiness, Healthcare IT, Payment Gateways, Deno, AWS ECS Fargate, Computer Vision
How to Work with Toptal
Toptal matches you directly with global industry experts from our network in hours—not weeks or months.
Share your needs
Choose your talent
Start your risk-free talent trial
Top talent is in high demand.
Start hiring