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PORTFOLIO / 2026 • FULL STACK & DISTRIBUTED SYSTEMS

Tanmay Das
builds resilient systems
that scale.

Full Stack Engineer @ ResCount • Hardware-to-Cloud Bridges • Enterprise SaaS

Full Stack Engineer at ResCount. I engineer high-concurrency enterprise platforms, real-time hardware-to-cloud bridges (RFID, LAN printing, Web Serial API), and production AI integrations across European commerce, academic research (IIT Kharagpur), and healthcare.

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GitHub ↗ LinkedIn ↗ ALO Lab (IIT KGP) ↗ Kentian Chamber ↗
🟢 Full Stack @ ResCount 🏛️ Platform for IIT Kharagpur ⚡ -40% Inventory Time (RFID POS) 🖨️ Zero-Loss LAN Print Fencing
mesh://lan-bridge
LIVE
RFID POS COM3 • SYNC
ESC/POS 0-Loss Queue
Cluster P99: 1.1ms
lan_print_agent.ts
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✔ TS Strict TypeScript 5.4 UTF-8 Redis NX Locked
zsh — 80×24
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Portfolio

Selected work.

Fifteen builds taken from idea to live production — AI vision pipelines, high-concurrency backends, and interfaces that hold up on real devices.

15Shipped builds
3AI systems
100%Live links
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Services

Full-stack capability,
production discipline.

Six production disciplines engineered to solve real enterprise bottlenecks — physical-to-cloud hardware bridges, commercial print fleets, async APIs, bespoke Shopify integrations, multimodal AI, and academic platforms.

06Core Disciplines
40%Faster Inventory (RFID)
0Dropped Print Jobs
01 / Hardware & POS

Hardware-to-Cloud & IoT Bridges

Connecting web apps directly to physical retail equipment. Bridging handheld RFID scanners, precision digital scales, and barcode readers via Web Serial API (COM ports @ 9600 baud) directly to browser POS checkouts—reducing inventory processing time by 40% for enterprise retail.

Web Serial APIRFID Scanner BridgeHardware POSZero-Tamper Weighing
02 / Commercial Fleets

Zero-Loss Kitchen & Receipt Fleet Printing

Solving commercial restaurant Wi-Fi dropouts. Engineered distributed local LAN print-agent microservices with dynamic mDNS discovery, atomic claim fencing, and Redis 7 lease tokens to guarantee zero dropped or duplicate tickets across commercial multi-branch fleets.

ESC/POS SocketsRedis 7 Soft-LocksClaim FencingmDNS Discovery
03 / Enterprise SaaS

High-Concurrency SaaS & Async APIs

Architecting production SaaS platforms with Python (FastAPI, SQLAlchemy 2.0 asyncpg) and Node.js. Enforcing multi-tenant RBAC, atomic database state machines, and background schedulers tested against heavy concurrent loads with Locust distributed load testing.

FastAPI AsyncSQLAlchemy 2.0Multi-Tenant RBACLocust Benchmarking
04 / Shopify & E-Commerce

Shopify Integration & Custom Storefronts

Engineering high-conversion bespoke Shopify storefronts and ecosystem pipelines. Crafting custom Liquid sections, responsive variant pickers, dynamic slideout carts, and real-time bidirectional GraphQL/REST Admin APIs—synchronizing multi-variant matrices, inventory levels, and webhook order fulfillment directly with warehouse ERPs (proven on Devora Luxury Storefront).

Shopify LiquidStorefront APICustom Theme SectionsERP Webhook SyncVariant Matrix
05 / Applied GenAI

Document Intelligence & Vision OCR

Transforming complex, unstructured documents into clean JSON data. Deployed production multimodal pipelines using Google Gemini Flash to transcribe handwritten doctor prescriptions and medical PDFs with sub-second response times and multi-language localization.

Google Gemini VisionMultimodal OCRClinical Data ExtractionPython Pipelines
06 / Institutional & Research

Academic Platforms & Citation Engines

Designing Apple-inspired 60fps web platforms for research institutions like IIT Kharagpur (A-L-O Lab). Built with Next.js 15 App Router, Payload CMS 3.0, and serverless PostgreSQL, featuring searchable publication archives and one-click dynamic BibTeX citation generation.

Next.js 15 App RouterPayload CMS 3.0BibTeX GeneratorApple Minimalist UI

Available for architecture reviews, audits, and build work.

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Full Stack Ecosystem

Tools & Production technologies.

Battle-tested frameworks, database engines, hardware protocols, and cloud platforms powering my production deployments.

17 core technologiesHover to pause
FastAPI (Python)
Next.js 15
React.js
React Native
TypeScript
PostgreSQL 16
Redis 7
Sails.js (Node)
Laravel
Web Serial API
ESC/POS Printing
Docker
Gemini 2.5 AI
MongoDB
Stripe Webhooks
Shopify & Liquid
Locust Testing
FastAPI (Python)
Next.js 15
React.js
React Native
TypeScript
PostgreSQL 16
Redis 7
Sails.js (Node)
Laravel
Web Serial API
ESC/POS Printing
Docker
Gemini 2.5 AI
MongoDB
Stripe Webhooks
Shopify & Liquid
Locust Testing
01 / Systems

High-Concurrency Systems

Crafting asynchronous execution pipelines in FastAPI & Sails.js, enforcing PostgreSQL row-level locks (FOR UPDATE), and verifying 99.9% uptime with Locust distributed load testing.

02 / Hardware

Hardware-to-Cloud Bridges

Direct physical hardware integration via Web Serial API—bridging handheld RFID scanners (-40% inventory time) and distributed LAN thermal print fleets with Redis 7 lease tokens and claim fencing.

03 / AI & Research

Applied AI & Research Engines

Deploying Google Gemini Flash multimodal vision OCR for clinical medical extraction alongside Next.js 15 / Payload CMS publication engines for IIT Kharagpur (A-L-O Lab).

About Me

Mission & journey.

Full Stack Engineer at ResCount bridging high-concurrency cloud backends, physical hardware protocols, and refined editorial interfaces.

West Bengal, IndiaUTC+5:30Since 2013
01Operating philosophy

Engineering with structural clarity & architectural rigor.

"Great distributed platforms are built on robust state machines, sub-millisecond latencies, and zero-loss hardware telemetry."

Hi, I'm Tanmay Das, a Full Stack & Distributed Systems Engineer based in West Bengal, India (UTC+5:30). Currently, I engineer commercial web platforms, real-time print microservices, and multi-tenant architectures at ResCount.

With an academic foundation in English Literature from the University of Kalyani (M.A., B.A. Hons), I bring an exceptional standard of structural discipline, clear communication, and architectural documentation to software design. I don't just write application code; I architect systems where data integrity, low latency, and hardware reliability are paramount.

My recent milestones include architecting the official research platform for IIT Kharagpur (A-L-O Lab) with Next.js 15 & Payload CMS, engineering custom RFID Web Serial scanner bridges that cut inventory processing by 40% at RPS Solutions, building zero-loss LAN thermal print fleets for French restaurant chains at ResCount, and delivering high-concurrency async APIs for Academicae.

-40% Inventory Time
0 Drop Print Fencing
99.9% SLA Target
⚡
Production Gateway Sync Hardware POS & LAN Agent Telemetry
100% Nominal (0 dropped)
Download Complete Resume (PDF)
02Milestones
  • Aug 2026 – Present Active

    Full Stack Engineer · ResCount

    Architecting multi-branch commercial web platforms, distributed LAN thermal print agents with claim fencing and lease tokens (zero dropped kitchen tickets), and 8-stage governance state machines with atomic PostgreSQL promotions.

  • Feb 2026 – Jul 2026 AI EdTech

    Software Engineer · Infomaticae

    Engineered scalable asynchronous REST APIs with Python (FastAPI) and cross-platform apps with React & React Native for Academicae (academicae.com). Built the "Hello Teacher" AI dashboard, student telemetry analytics, and asyncpg connection pooling.

  • Jun 2024 – Jul 2025 Enterprise ERP

    Full-Stack Engineer / Web Developer · RPS SOLUTIONS PVT. LTD.

    Spearheaded full-stack engineering of RPS Jewel Pro using Laravel & React. Cut manual inventory processing time by 40% via custom RFID Web Serial scanner API. Built automated Shopify omnichannel synchronization and automated GST return accounting.

  • 2015 – 2024 Full SDLC & Systems

    Independent Full-Stack Developer & Technical Systems Specialist

    Delivered 10+ custom web platforms and scalable SaaS dashboards using PHP & Laravel with third-party payment gateways, SMS APIs, and Google Auth. Concurrently authored structured technical documentation and educational frameworks, mastering the ability to translate intricate business requirements into precise, high-performance software specifications.

  • 2013 – 2015 Postgraduate

    Academic Foundation · University of Kalyani

    M.A. English and B.A. English (Hons). Cultivated structural analysis, precise technical documentation, and architectural communication clarity.

Skills & Stack

Daily workflow & core stack.

The languages, frameworks, and architecture patterns that power production builds daily.

06 domains32+ technologiesDaily in rotation
01
Languages
PythonJavaScriptTypeScriptPHPSQLHTML5 / CSS3
02
Frameworks
FastAPISails.js v1Next.js 15LaravelReact 19React Native
03
Motion & UI
GSAP 3ScrollTriggerFramer MotionTailwind CSSRadix UILenis Scroll
04
Platforms & DBs
PostgreSQL 16 (asyncpg)Redis 7MongoDB (2dsphere)Payload CMS 3.0Docker / AWS
05
Hardware & IoT
Web Serial API (COM3)RFID Hardware BridgeESC/POS Raw SocketsmDNS Device DiscoveryZero-Loss Print Fencing
06
Practices
Locust Load TestingPostgreSQL Row LockingDouble-Entry LedgersRestic Disaster RecoveryLighthouse 98+
GitHub Integrations

Repository commit telemetry & live compilations.

Streak Metrics: 142 Days · Deploy Rating: 99.9%
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Dosfolio System Sandbox Console. Handshake completed.
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-40%INVENTORY TIME (RFID)
0 DropPRINT LEASE FENCING
8-StageGOVERNANCE FSM
Sub-SecGEMINI FLASH OCR
Freelance Rates

Transparent investment.

Flexible packages tailored to your engineering requirements, from high-performance landing pages to full enterprise ERPs.

USD pricingFixed scope or hourly
Front-End & Showcase

60fps Editorial & Headless Showcase

$190+ / project

High-conversion editorial web experiences benchmarked against Linear and Stripe with custom GSAP 3 micro-interactions, dark/light theme, and headless CMS setup.

  • Custom responsive layout & typography
  • GSAP 3 & Lenis smooth scroll motion
  • Lighthouse 98+ score guarantee
  • Headless CMS / Markdown blog setup
Get Started
Full-Stack SaaS

Dynamic Web App (React 19 / Next.js 15)

$480+ / project

Production-ready SaaS platform with reactive state architecture, authenticated tenant dashboard, payment webhooks, and real-time telemetry.

  • React 19 / Next.js 15 Server Actions
  • Stripe / payment checkout webhooks
  • Granular RBAC & multi-tenant auth
  • Real-time telemetry & analytics setup
Get Started
Microservices

Backend API & Distributed Systems

$320+ / project

High-concurrency RESTful & WebSocket APIs engineered with Python FastAPI or Sails.js, optimized for asyncpg PostgreSQL transactions.

  • Asynchronous FastAPI / Sails.js endpoints
  • PostgreSQL 16 schemas & asyncpg migrations
  • JWT auth, rate limiting & CORS fencing
  • Redis 7 caching & pub/sub streams
Get Started
★ Flagship IoT

Hardware & IoT Web Serial Bridge

$550+ / project

Bridging physical hardware to web browsers (Web Serial API for RFID scanners, digital scales, ESC/POS LAN thermal printers) with zero dropped packets.

  • Web Serial API (COM3 @ 9600 baud) parser
  • ESC/POS raw thermal print dispatcher
  • Distributed Redis 7 claim lease fencing
  • POS counter direct browser integration
Get Started
Turnkey Enterprise

Full Stack ERP & POS System

$950+ / project

Complete enterprise ERP covering real-time FIFO inventory deduction, supplier purchasing, POS counters, and automated GST/P&L double-entry ledgers.

  • Double-entry automated GST accounting
  • Real-time FIFO inventory deduction
  • Hardware scanner & receipt integration
  • Multi-tier role & branch hierarchy
Get Started
Advisory & Performance

Systems Advisory & Bug Fixes

$40 / hour

Direct architectural consulting, database indexing, Locust concurrency stress testing, or escalated code audit for active production codebases.

  • PostgreSQL EXPLAIN ANALYZE query tuning
  • Locust load testing & concurrency audit
  • Hardware bridge & serial diagnostics
  • Same-day emergency turnaround
Book Consultation
Get In Touch

Contact terminal.

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West Bengal, IndiaUTC+5:30Firebase delivery
✉
Operational Mail dastanmay30@gmail.com
LinkedIn Profile linkedin.com/in/tanmay-das-dev
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Phone / WhatsApp +91 8348146101
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Operational Base West Bengal, India · UTC+5:30
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