Harikrishnan is available for hire

Harikrishnan Muraleedharan Nair

Verified Expert in Engineering

IoT Developer

Chennai, Tamil Nadu, India

Toptal member since February 12, 2025

Expertise

Python Raspberry Pi Arduino Software Development Node-RED C SCADA Bluetooth C++SQL Linux

Bio

Harikrishnan is an IT/OT consultant with over 20 years of experience in IoT, IIoT, and Industry 4.0. He specializes in integrating IT/OT systems, industrial protocols, and IBM Maximo implementations across various industries. His expertise spans digital transformation, predictive maintenance, and IIoT solutions, establishing him as a trusted leader in operational technology innovation.

Portfolio

Royal Council Of Saudi Arabia

IBM Maximo

National Grid, Saudi Arabia

IBM Maximo, OPC UA, SCADA, C++, C, Python, SQL

Vodafone UK

Internet of Things (IoT), 5G

Experience

IBM Maximo - 14 years
Industrial Internet of Things (IIoT) - 6 years
Raspberry Pi - 6 years
Arduino - 6 years
Python - 6 years
C - 5 years
AWS IoT - 4 years
ESP32 - 4 years

Availability

Full-time

Preferred Environment

Industrial Internet of Things (IIoT), AWS IoT, IBM Maximo, Python, Raspberry Pi, Arduino, ESP32, C, CODESYS, PLC

The most amazing...

...achievement was developing an IoT-enabled solution that integrated sensors with IBM Maximo, enabling predictive maintenance and significantly reducing downtime.

Work Experience

Maximo Functional Consultant

2023 - 2024

Royal Council Of Saudi Arabia

Spearheaded end-to-end IBM Maximo asset management implementations, collaborating with stakeholders to define requirements and meet business objectives, resulting in successful enterprise-wide deployments.
Enhanced business processes by developing custom software solutions, optimizing workflows, and implementing innovative applications tailored to client needs.
Served as the key liaison between technical and business teams, translating complex concepts into clear communication and ensuring alignment throughout project lifecycles.

Technologies: IBM Maximo

IBM Maximo Techno-functional Consultant

2022 - 2023

National Grid, Saudi Arabia

Developed and implemented IBM Maximo IIoT application stack, integrating OPC brokers and reading PLC tags to enhance asset performance monitoring.
Configured and tested industrial communication protocols, including MQTT, OPC UA, Modbus, and Ethernet, ensuring seamless data exchange between SCADA systems.
Designed and deployed new Maximo screens using Application Designer, integrating SQL Server for data management and optimizing system workflows.
Automated repetitive processes in Maximo using robotic process automation (RPA), reducing manual effort and improving operational efficiency.
Integrated real-time sensor data with IBM Maximo using MQTT and OPC UA, enabling predictive maintenance and reducing equipment downtime.
Implemented custom scripts in Python and C++ to optimize Maximo workflows, enhancing system automation and data processing.
Configured Maximo Asset Management modules, including preventive maintenance, work orders, and inventory, to align with business needs.
Developed SQL queries and reports for Maximo, extracting actionable insights and improving decision-making for asset management teams.

Technologies: IBM Maximo, OPC UA, SCADA, C++, C, Python, SQL

Product Architect

2021 - 2022

Vodafone UK

Engineered an IoT-enabled private network solution, integrating industrial protocols like OPC UA and MQTT to enhance secure communication in smart manufacturing environments.
Developed technical designs aligning MPN solutions with IoT-driven predictive maintenance, reducing industrial downtime through real-time data insights.
Optimized cross-functional collaboration to deploy private 5G networks for IoT applications, improving data security and operational efficiency in industrial settings.

Technologies: Internet of Things (IoT), 5G

Industry 4.0/Digital Transformation Consultant

2020 - 2021

Blackrook Corporation, Barrington, IL

Developed an IoT-enabled asset monitoring solution by integrating voltage, current, and vibration sensors with Raspberry Pi, using OPC UA and MQTT for real-time data transmission to IBM Maximo.
Configured IBM Maximo to automate predictive maintenance workflows by setting up alerts based on sensor data, reducing downtime and optimizing asset performance.
Designed and implemented industrial sensor networks using OPC UA, Modbus, and BLE for real-time data acquisition, improving operational efficiency.
Engineered SQL-based data pipelines to integrate IIoT sensor readings into IBM Maximo, enabling predictive analytics and asset tracking.
Developed custom scripts in Python and C++ for data processing, enhancing the efficiency of IBM Maximo asset management integrations.
Programmed edge computing solutions on ESP32 and ARM platforms, processing industrial sensor data before forwarding it to IBM Maximo via MQTT.
Optimized IBM Maximo workflows and escalations, enhancing asset lifecycle management and preventive maintenance scheduling.
Designed and deployed an OPC UA-based communication framework to facilitate secure and scalable industrial data exchange with IBM Maximo.
Implemented real-time monitoring dashboards in IBM Maximo by integrating SQL queries with IIoT sensor data for enhanced decision-making.
Executed MQTT-based data ingestion frameworks, reducing latency in transmitting real-time industrial sensor data to IBM Maximo.

Technologies: AWS IoT, OPC UA, Modbus Protocol, Node-RED, C, C++, Python

BLE Sensor Developer

2019 - 2019

Lego Asset Management Solutions

Developed custom BLE sensors using Arduino, Raspberry Pi, and ESP32, optimizing wireless communication protocols to enhance connectivity and reduce data transmission latency by 30%.
Engineered an IoT-enabled asset monitoring system integrating BLE sensors, achieving real-time tracking with a 20% improvement in signal stability over previous implementations.
Optimized BLE firmware to extend sensor battery life by 40%, ensuring long-term deployment in industrial asset management applications.
Integrated BLE sensors with Raspberry Pi-based edge computing systems, enabling predictive maintenance by processing sensor data locally before cloud transmission.

Technologies: Bluetooth, C, C++, Python

OPC UA Server Architect

2019 - 2019

Lego Asset Management Solutions, Chennai

Developed OPC UA server solutions using Raspberry Pi and Python, optimizing industrial communication and enhancing data interoperability across legacy systems.
Integrated OPC UA with existing industrial infrastructure, improving data exchange efficiency and reducing latency in real-time monitoring applications.
Implemented secure and scalable OPC UA architecture using Codesys and Kepware, ensuring reliable data transmission for predictive maintenance and automation.
Optimized industrial data flow by incorporating MQTT and Modbus with OPC UA, enabling seamless connectivity between edge devices and enterprise systems.

Technologies: OPC UA, Modbus Protocol, MQTT, C++, C

IBM Maximo/RPA Consultant

2018 - 2018

CIBAVision, Indonesia

Developed automation robots using UIPath to streamline IBM Maximo workflows, enhancing efficiency in service request creation, purchase requisitions, and currency updates.
Automated the creation of Maximo service requests by integrating email parsing, reducing manual effort and response time for issue resolution.
Implemented a robotic process to generate purchase requisitions from email requests, ensuring seamless procurement workflow automation in Maximo.
Integrated real-time currency exchange rate updates from xe.com into Maximo, eliminating manual data entry and ensuring accurate financial transactions.

Technologies: IBM Maximo, Robotic Process Automation (RPA)

IBM Maximo Functional Consultant

2018 - 2018

NGHI SON REFINERY AND PETROCHEMICAL LLC , Vietnam

Developed a new Maximo Purchase Module application, enhancing procurement efficiency by streamlining purchase request workflows.
Designed technical specifications aligning with functional requirements, ensuring seamless integration with IBM Maximo's existing architecture.
Configured SQL Server, domains, custom lookups, and escalation tasks in Maximo, improving data retrieval and automation.
Created new screens in Maximo Application Designer, optimizing user experience and enabling better asset and purchase order management.

Technologies: IBM Maximo, Robotic Process Automation (RPA)

IBM Maximo Functional Consultant

2016 - 2018

Kuwait Oil

Developed a new process hazard analysis application in IBM Maximo, improving risk assessment workflows for Kuwait Oil Company within a two-month project timeframe.
Led the upgrade of a highly customized IBM Maximo 7.1 instance to Maximo 7.6, ensuring seamless data migration and system continuity for Kuwait Oil Company.
Configured Maximo screens, domains, custom lookups, and SQL Server settings to optimize asset management operations for NGHI SON Refinery and Petrochemical LLC.
Automated data conversion from Maximo 7.1 to 7.6, reducing manual intervention by 40% and enhancing data integrity during system migration.
Developed training materials for IBM Maximo v7.6, enabling structured knowledge transfer for enterprise asset management across multiple business units.
Designed workflows and application screens in IBM Maximo for enhanced work order management, ensuring compliance with Kuwait Oil Company’s asset management policies.
Implemented robotic process automation (RPA) in Maximo using UIPath, streamlining service request creation, purchase requisitions, and currency exchange rate updates.

Technologies: IBM Maximo

IBM Maximo Implementation Consultant

2016 - 2016

South Pacific Brewery , Papua New Guinea

Designed and implemented customized workflows in IBM Maximo using Workflow Designer, streamlining asset management and improving operational efficiency.
Developed technical designs for Maximo customizations, ensuring seamless integration with existing systems and enhancing asset tracking capabilities.
Installed and configured IBM Maximo 7.5 on Windows Server 2012 R2 with SQL Server, optimizing system performance and reliability.
Executed data migration from flat files to Maximo using MEA integration, ensuring accurate and efficient transfer of asset records.
Conducted process definition interviews and gathered key business requirements to align Maximo implementation with operational needs.

Technologies: IBM Maximo, Python

IBM Maximo Consultant

2015 - 2015

Tenaga Nasional Berhad , Malaysia

Conducted workshops across multiple business functions, gathering requirements and aligning IBM Maximo with organizational goals, ensuring seamless system integration.
Analyzed existing workflows and proposed process improvements, enhancing IBM Maximo efficiency and optimizing asset management operations.
Directed project teams in the design and implementation of IBM Maximo, ensuring timely deployment and adherence to best practices.
Collaborated with stakeholders to define IBM Maximo configurations, customizing modules to improve asset tracking and preventive maintenance workflows.
Translated business needs into IBM Maximo functionalities, ensuring smooth application development and maximizing system utilization.

Technologies: IBM Maximo, SQL, IBM Db2, Linux, Python

Experience

Monitoring System

https://www.youtube.com/watch?v=yANHPZfIGaI

I developed an IoT-enabled condition-monitoring solution for AC motors using voltage, current, and vibration sensors. I architected the system with Raspberry Pi for edge processing and data collection, implementing OPC UA and MQTT protocols for real-time data transmission to IBM Maximo. I configured automated predictive maintenance workflows based on sensor thresholds, reducing equipment downtime by enabling early fault detection and predictive maintenance.

Smart Electrical Asset Transformation: Integrating OPC UA, MQTT, Python, and IBM Maximo

Leveraged extensive electrical expertise to transform asset management for Tenaga Nasional Berhad. At Tenaga Nasional Berhad, engineered an IIoT solution that utilized OPC UA for seamless interfacing with electrical systems and MQTT for robust, real-time sensor data transmission. Developed Python-based analytics to optimize performance and enable predictive maintenance, driving enhanced asset reliability.

At National Grid Saudi Arabia, architected an IBM Maximo IIoT application stack by integrating OPC brokers and automating PLC data collection, streamlining workflows, and improving decision-making. This consolidated project merged electrical system insight with digital innovation, delivering a scalable, data-centric solution that maximized operational efficiency and minimized downtime.

Education

2019 - 2020

Postgraduate Degree in Materials Management

Annamalai University - Chennai, India

1989 - 1992

Bachelor of Science Degree in Physics

University of Kerala - Kerala, India

Certifications

APRIL 2016 - PRESENT

IBM Tivoli Maximo Asset Management V7.5 Implementation Certified Professional

IBM

Skills

Tools

IBM Maximo, MQTT, Node-RED

Languages

Python, C, C++, SQL

Platforms

Raspberry Pi, Arduino, AWS IoT, Linux

Storage

IBM Db2

Other

Industrial Internet of Things (IIoT), ESP32, CODESYS, OPC UA, APIs, Edge Computing, Software, Programming, Internet Protocols, Communication, Hardware, Voltage-controlled Oscillators (VCO), Vibration Sensors, OPC Data Access, PLC, Electronics, Materials Management, Robotic Process Automation (RPA), Modbus Protocol, SCADA, Internet of Things (IoT), Bluetooth, 5G

Collaboration That Works

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

Discuss your requirements and refine your scope in a call with a Toptal domain expert.

Choose your talent

Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.

Start your risk-free talent trial

Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.

Top talent is in high demand.

Start hiring