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Rajkumar Rajalingam

@rajkumarrajalingam

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Experienced data professional specializing in AI annotation and data harvesting.

India

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What I'm looking for

I seek roles leveraging data harvesting, annotation, and automation where I can improve processes, build scalable workflows, and deliver measurable client outcomes in collaborative, growth-focused environments.

I am a results-driven freelance data professional with extensive experience in data harvesting, annotation, AI training, and automation. I deliver high-quality work across diverse projects and excel at adapting to dynamic client needs.

My career includes roles designing process workflows, leading large-scale data operations, and developing tools that improved efficiency and accuracy. I have handled projects such as extracting 250K+ LinkedIn executive profiles and 200K profiles from YP.com, and processing over 40M phone numbers.

I consult on bot development, process flow design, resource management, and RPA, and I have supported academic thesis work and company policy writing. I am proficient with SQL, Excel, MS Access, web scraping and data validation techniques.

I prioritize clear communication, pragmatic problem-solving, and measurable outcomes, and I have a track record of successful freelance engagements on Upwork, Fiverr, and Guru.com that consistently meet client goals.

Experience

Work history, roles, and key accomplishments

Current

Freelance Data Specialist

Current

Freelancer

Nov 2018 - Present (7 years 1 month)

Delivered large-scale data harvesting, annotation, and AI training projects including extraction of 450K+ profiles and language-model annotation in Tamil and Indian English, improving dataset quality for major clients.

Data Harvesting Web Scraping Data Annotation Data Cleaning SQL Excel Lead Generation

Data and Analytics Architect

Aggregate Intelligence Pvt. Ltd.

Oct 2017 - Nov 2018 (1 year 1 month)

Analyzed hotel industry data to develop pricing-driven products and standard operating procedures, and led staff training to operationalize analytics solutions.

Data Analysis Dynamic Pricing Product Development SOPs Staff Training SQL Reporting Analytics

Head - Process Excellence

Mobius365 Knowledge Services Pvt. Ltd.

Feb 2013 - Sep 2017 (4 years 7 months)

Designed process workflows and automation feasibility studies, led phone-pinging operations processing 40M+ numbers, and coordinated tool development across tech and operations teams.

Process Design Automation Operations Management Performance Optimization SOPs Quality Assurance Cost Optimization

Senior Process Manager

365 Media Pvt. Ltd.

Aug 2012 - Feb 2013 (6 months)

Defined process flows and managed production transitions for new projects, ensuring operational readiness and compliance with data safety standards.

Process Management Compliance Team Coordination SOPs Training Quality Control

Director - Operations

Avatar Petrochemicals Pvt. Ltd.

Feb 2011 - May 2012 (1 year 3 months)

Managed finance, invoicing, billing and logistic clearance for a petroleum products company, overseeing operational and financial workflows.

Finance Management Invoicing Logistics Billing Operations Compliance Reporting

Head - Software & Automation

365 Media Pvt. Ltd.

Dec 2009 - Feb 2011 (1 year 2 months)

Supervised internal software and data-harvesting operations and developed custom interfaces and products to meet business needs.

Software Supervision Automation Data Harvesting Product Design Quality Assurance SQL Regex

Manager - Data Delivery

365 Media Pvt. Ltd.

Dec 2007 - Nov 2009 (1 year 11 months)

Led data validation, analysis, migration, and web harvesting projects using SQL, Java, and regex-based tools to ensure high-quality deliverables.

Data Migration Data Validation SQL Java Regex & QA

Senior Internet Researcher

365 Media Pvt. Ltd.

Mar 2007 - Dec 2007 (9 months)

Managed complex database maintenance, content creation, and quality control for large-scale research and data projects.

Internet Research Content Creation Quality Control Data Analysis SGML Tagging Reporting

Internet Researcher

365 Media Pvt. Ltd.

Feb 2006 - Mar 2006 (1 month)

Conducted web research, data analysis, and SGML tagging to support publishing and data delivery operations.

Web Research Data Analysis SGML Tagging Data Entry Reporting Quality Assurance

Representative - Sales

Qualigens Fine Chemicals

Jan 2005 - Jan 2006 (1 year)

Oversaw sales and marketing of microbiology-related products in Tamil Nadu, managing client relationships and regional distribution.

Sales Marketing Client Management Product Promotion Territory Management Relationship Building Reporting

Assistant Editor - Technical

Macmillan India Pvt. Ltd.

Jan 2004 - Jun 2004 (5 months)

Managed technical editing and proofing of international research journals for HTML/SGML/XML compliance, supporting publications like Nature Biotechnology.