Who's building

One person, both sides of the software-to-silicon line.

I'm Karthik, a solo builder in Bangalore. I run Hivelinks Technologies, design and install smart homes, and spend my off hours flashing firmware onto things that have no business being connected. Firmware, hardware, backend, dashboard: one pair of hands across the whole stack.

400+
Companies run from one seat
100+
Deployments shipped
5+ yrs
Longest system running
24/7
Field uptime monitored
Available for projects Builder · Maker

Four trades. One pair of hands.

NO. 01

Operations Software

Software that runs the daily work of a business, not just records it.

  • Replace spreadsheets and message threads with one operational system.
  • Workflows shaped around how your team already works.
  • Dashboards that answer the question before you ask it.
NO. 02

Connected Devices & IoT

Machines, vehicles and meters reporting in, live.

  • Bring offline equipment online without replacing it.
  • Live telemetry from the field to a dashboard you own.
  • Alerts that reach you before a customer does.
NO. 03

Custom Firmware

The code that makes the hardware behave.

  • Firmware written for the device, not ported onto it.
  • Reliable over flaky networks and long deployments.
  • Updated in the field, no truck roll.
NO. 04

Home Automation

Smart homes that still work when the internet doesn't.

  • Lighting, security and energy under one roof.
  • Local-first control: no cloud, no lag, no outage.
  • Designed, installed and supported in Bangalore.
Learn more →

Why build with me.

01

Demo first

You see it working before you commit. No slide decks standing in for software.

02

Fits your operation

Built around your process, not a template you bend yourself to fit.

03

Owned end-to-end

One person from firmware to dashboard. Nothing lost in handoffs between vendors.

04

Built to last

Systems still running five years on. I build things I can keep alive.

Selected work

Things I have shipped.

01

School Management Platform

Admissions, attendance, fees and communication for schools, run from one place.

View on hivelinks.in →
02

HR, Payroll & Compliance

Payroll, attendance and statutory compliance without the monthly scramble.

View on hivelinks.in →
03

Fleet & GPS Tracking

Live vehicle location, trips and alerts for fleets on the move.

View on hivelinks.in →
04

Equipment Monitoring Cloud

Industrial equipment reporting its own health, online and on call.

View on hivelinks.in →
05

Multi-site Camera Monitoring

Cameras across many sites, watched from a single screen.

View on hivelinks.in →
06

Smart Home Installations

Residential automation designed, installed and supported across Bangalore.

See the page →
Case studies

Two problems, solved.

CASE 01

Running a large compliance book through one operator

Problem
A growing compliance practice was tracking hundreds of filings across spreadsheets, email and memory. One missed deadline meant a penalty.
Process
Mapped every recurring obligation, then built the workflow around the operator's real routine instead of an idealised one.
Solution
One system that knows what is due, who owns it, and what is slipping, with reminders that fire before deadlines, not after.
Result
[PLACEHOLDER: measured outcome, e.g. filings handled per operator, missed-deadline rate]
CASE 02

Putting offline equipment online, affordably

Problem
Field equipment gave no signal until it failed. Every fault was a surprise and a site visit.
Process
Added sensing to existing machines rather than replacing them, and sent telemetry over whatever network the site already had.
Solution
A live dashboard showing every unit health, with alerts that reach the team before the customer notices.
Result
[PLACEHOLDER: measured outcome, e.g. units monitored, downtime reduced, site visits avoided]

The whole stack.

Software & Product

  • React
  • Node.js
  • PostgreSQL
  • REST & Realtime APIs
  • Dashboards
  • Auth & Roles

Firmware & Hardware

  • ESP32
  • Arduino / ESP-IDF
  • LoRa
  • Modbus / RS-485
  • Sensors
  • PCB Design

IoT & Data

  • MQTT
  • Time-series Telemetry
  • Device Provisioning
  • Alerting
  • Edge-to-Cloud

Systems & Self-hosting

  • Docker
  • Linux
  • Home Assistant
  • Zigbee2MQTT
  • NAS
  • Local-first
After hours

The part I would do for free.

Off the clock I am still building. Different stakes, same itch: make one thing talk to another and do something useful.

ESP32 & Firmware

I flash microcontrollers for fun and write the firmware that makes them behave. A board, a sensor, a radio, and an evening quietly disappears.

Electronics & Hardware

Breadboards, solder, the occasional custom PCB. I like understanding a system down to the trace, not just the API on top of it.

Home Assistant & Self-hosting

I run my own stack. Local-first automations, dashboards I built myself, data that stays in the house. Owning it beats renting someone cloud.

How I got here.

  1. [PH]

    [PLACEHOLDER: where it started, the first thing built and why]

  2. [PH]

    [PLACEHOLDER: first system shipped to a real user]

  3. [PH]

    [PLACEHOLDER: Hivelinks founded, the scope widened]

  4. [PH]

    [PLACEHOLDER: now, what is on the bench today]

Got a problem worth soldering?

An operational headache, a device that should be online, or a home that should be smarter. Tell me about it.

Let's talk →