I design and ship production software end-to-end — from cloud-native Node.js backends and React interfaces to cross-platform Flutter apps and firmware on ESP8266 microcontrollers humming away in the field. Over the last 3+ years of freelancing, I've delivered SaaS products, mobile apps on the Play Store, automation platforms, and IoT systems that move real data between devices, dashboards, and decision makers.
name: Nitesh Kadve
role: Full Stack Engineer · Flutter Developer · IoT Developer
focus: backend architecture · cross-platform mobile · real-time systems · embedded + cloud
experience: 3+ years freelancing · full product lifecycle
domains: smart agriculture · e-commerce · matrimony · automation · SaaS
stack: Node.js · Express · React · Flutter · MQTT · ESP8266 · MySQL · MongoDB
mission: "Bridge the physical world to the cloud — reliably, at scale."
status: open to backend / mobile / IoT engineering opportunities|
Building a low-latency MQTT control plane for ESP8266-based motor controllers — sub-second relay actuation, GSM fallback over SIM800L, and a remote dashboard for thousands of farm endpoints. |
Designing event-driven Node.js services with WebSocket + MQTT bridges, Redis fan-out, and idempotent device APIs that survive flaky cellular networks. |
Backend · APIs · Realtime
Frontend · UI
Mobile · Cross-Platform
Databases · Caching
IoT · Embedded · Hardware
DevOps · Cloud
Testing · Tooling
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ESP8266 / ESP32 firmware with OTA updates, deep-sleep power profiles, watchdog recovery, and resilient reconnect logic for unreliable links. |
WiFi + GSM (SIM800L) fallback, MQTT QoS-aware publishing, HTTP retries with backoff, and store-and-forward for offline-tolerant devices. |
MQTT brokers (Mosquitto / EMQX) bridged to Node.js services, time-series persistence, and real-time dashboards via WebSockets. |
Hardware & protocols I work with regularly
| Layer | Stack |
|---|---|
| MCUs | ESP8266, ESP32, Arduino Nano/Uno |
| Modems | SIM800L (GPRS), SIM7600 (4G/LTE) |
| Sensors | DHT22, soil moisture, current sensors, float switches, voltage dividers |
| Actuators | Relays, contactors, motor starters, solenoid valves |
| Protocols | MQTT, HTTP/REST, WebSockets, Modbus, AT commands |
| Tooling | PlatformIO, Arduino IDE, Wireshark, MQTT Explorer, Node-RED |
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What I build
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How I build it
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Remote pump and motor control for farms — cellular fallback, scheduled irrigation, dry-run protection, and real-time telemetry to a cloud dashboard.
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Operator console for live device telemetry — connection state, sensor charts, alert rules, and one-click remote commands across fleets of devices.
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End-to-end visibility into MQTT topics, message rates, retained payloads, and per-device health — built for ops teams running production IoT.
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Order intake, route planning, agent assignment, proof-of-delivery, and customer notifications — built as a multi-tenant SaaS with role-based access.
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Production billing system with GST-compliant invoicing, inventory tracking, customer ledgers, and PDF/email delivery for SMB customers.
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Lab management for pathology centers — patient intake, test catalogs, lab workflow, signed PDF reports, and SMS/WhatsApp delivery to patients.
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Native-feel grocery delivery app inspired by Blinkit/Zepto — category-first browsing, live cart, address picker with geocoding, payment flow, order tracking, and push notifications. Built on a multi-tenant Node.js backend.
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Cross-platform app for farmers — crop advisory, agri-input catalog, expert chat, order & delivery tracking, multi-language UI, and offline-first product browsing for low-connectivity rural users.
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End-to-end matrimony platform — profile creation with verification, advanced filters (caste, community, location, lifestyle), interest & shortlist flows, in-app chat, and subscription-based premium tiers.
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More projects on my GitHub — open-source experiments, client work case studies, and IoT firmware samples coming soon. |
┌─ 3+ YEARS · FREELANCE & PRODUCT WORK ───────────────────────────────────────┐
│ │
│ ▸ Shipped 10+ production systems across SaaS, IoT, mobile, and tooling │
│ ▸ Built & released Flutter apps — matrimony, quick-commerce, agri-tech │
│ ▸ Designed MQTT-based control planes for cellular-connected devices │
│ ▸ Built multi-tenant Node.js backends with role-based access control │
│ ▸ Authored ESP8266 firmware running in agricultural deployments │
│ ▸ Delivered end-to-end: requirements → schema → API → app → device → ops │
│ ▸ Mentored junior devs · code reviews · architecture decisions │
│ │
└─────────────────────────────────────────────────────────────────────────────┘
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Backend / IoT engineering positions at product companies building real-time or device-connected systems. |
End-to-end product builds — backend, frontend, firmware, deployment. Long-term retainer or fixed scope. |
Architecture reviews, MQTT/IoT system design, performance audits, and team mentorship. |
| Channel | Handle |
|---|---|
| niteshpawar97@gmail.com | |
| linkedin.com/in/niteshkadve | |
| X / Twitter | @niteshpawarking |
| Website | niteshkadve.me |
| GitHub | @niteshpawar97 |
“Bridge the physical world to the cloud — reliably, at scale.”