Vijayakumar B.

About Me

Vijayakumar is a Lead Software Engineer with 7+ years of full-time industry experience delivering scalable, data-intensive solutions across B2B, fintech, SaaS, insurance, and healthcare domains. Vijayakumar supported a B2B enterprise platform with an active user base of 100-200 users, processing 100+ million records and managing data volumes reaching terabyte scale, while adapting seamlessly across multiple technologies and systems. Engineered automation widgets that reduced manual processing time from approximately 15 minutes to under 1 minute, improving operational efficiency. He has proven expertise in building scalable, data-intensive systems, contributing to platforms processing hundreds of millions of records and supporting high-reliability, compliance-driven B2B environments. Optimized large-scale data migration workflow, successfully migrating 500+ million records and cutting execution time from nearly two weeks to under six hours through multi-threaded distributed processing. A career-driven professional aspiring Lead / Senior Software Development roles to architect and deliver large-scale, data-intensive platforms, contribute to cloud and modernization initiatives, and guide teams through best engineering practices in fast-paced, enterprise environments.

AI, ML & LLM

Frontend

Backend

Database

DevOps

QA & Testing

Vitest

Workflow

Other

Work history

Nitor Info Tech.
Lead Engineer
2025 - 2026 (1 year)
Remote
  • Designed and implemented reporting widget components within canvas-based workflow to support automated business processes.

  • Developed Distributed data processing of large data pipelines of 400+ TB data by leveraging Spark services executed on AWS EMR, GCP data proc for large-scale processing.

  • Leading cloud migration initiatives by transitioning owned modules from AWS to multiple GCP projects.

Nitor Info Tech.
Senior Software Developer
2024 - 2025 (1 year)
Remote
  • Designed and implemented reporting widget components within canvas-based workflow to support automated business processes.

  • Configured event-driven scheduled jobs through the Event Manager service to execute actions upon widget invocation.

  • Enhanced CI/CD automation by actively contributing improvements and change requests to existing Harness pipelines.

Indhu Consultancy
Founder & Software Consultant
2023 - 2024 (1 year)
Remote
  • Established and led an independent consulting practice, delivering end-to-end custom software solutions across insurance, SaaS, video-conferencing, and healthcare domains while managing client acquisition, delivery, and post-deployment support.

  • Executed and governed multiple parallel engagements, collaborating with stakeholders, architects, and business analysts to design scalable solutions and ensure on-time, quality-driven delivery.

  • Developed team capability and long-term client relationships by mentoring developers, enforcing best practices, and generating repeat business through trust-based consulting.

Zoho Corporation
Member Technical Staff
2018 - 2023 (5 years)
Remote
  • Implemented OAuth-based integrations across internal platforms including Zoho CRM, Zoho Recruit, and Zoho Bigin.

  • Redesigned and transitioned legacy servlets to a modern user interface for Integration and Sync modules in line with 2019 design specifications.

  • Partnered closely with technical support teams to investigate and resolve customer-reported issues.

Zoho CRM RESTFul APIs Kafka
GLOM
Freelance Developer
1 - 1
Remote
  • Designed and maintained dynamic UI forms for product data entry, implementing robust input validations using YUP and resolving existing application defects to improve stability.

  • Implemented secure user authentication and role-based access control leveraging AWS Cognito to ensure controlled and compliant system access.

  • Strengthened back-end reliability and search capabilities by introducing a global exception managing mechanism using Spring Boot Controller Advice and building product suggestion features powered by PostgreSQL full-text search.

Celsior Technologies
Freelance Developer
1 - 1
Remote
  • Owned the end-to-end front-end codebase, ensuring maintainability and scalability while driving feature development across the application.

  • Interpreted BRDs and prepared accurate effort estimates, collaborating closely with architects to define simple, effective component and framework design approaches.

  • Partnered regularly with business analysts to refine user-centric solutions and translate business needs into intuitive front-end implementations.

Vitest Vue Test Utils
WeeseDo
Freelance Developer
1 - 1
Remote
  • Analyzed and reverse-engineered the existing PHP application, gaining a deep understanding of code flows and system behavior, and introduced Express-based APIs with minimal disruption to the current architecture.

  • Diagnosed and resolved complex issues through frequent debugging while proactively communicating system limitations and improvement opportunities with native development teams.

  • Designed and implemented a scalable Vue.js 3 front-end architecture, creating low-level designs in Quasar using a blend of Hexagonal, KISS, and SOLID principles, and delivering reusable micro-components and complex business components aligned with functional requirements.

CrewScale
Senior Technical Consultant
1 - 1
Remote
Karthik Healing Centre
Freelance Developer
1 - 1
Remote

Education

Education
Data Engineering Certification
Education
Bachelor of Engineering (Electronics and Communication Engineering)
Saveetha Engineering College
2018