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Arjavkumar Virani

@arjavkumarvirani

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Senior Full Stack and Blockchain Developer delivering scalable Web2/Web3 systems.

Canada

Message

What I'm looking for

I seek roles building scalable Web2/Web3 systems where I can optimize performance, lead migrations, and apply blockchain and AI integrations in a collaborative, growth-focused team.

I am a Senior Full Stack and Blockchain Developer with 8+ years of production experience building and shipping web platforms and decentralized applications on Ethereum and Polygon. I specialize in refactoring legacy systems, scaling backends, and bridging Web2 and Web3 to deliver reliable, performant products.

I've led large migrations and performance initiatives—spearheading a 2TB+ MySQL-to-MongoDB migration, improving query performance by 40%, and delivering platforms with 99.99% uptime serving tens of thousands of daily users. I also architected CI/CD pipelines, automated deployments, and reduced deployment times by 84% while improving developer onboarding and testing throughput.

On the blockchain side, I developed and audited smart contracts with Solidity and Hardhat, reduced gas costs by 20%, and integrated secure Web3 frontends to accelerate user transactions by 30%. I build pragmatic solutions focused on measurable outcomes: faster data retrieval, lower costs, and higher throughput.

Experience

Work history, roles, and key accomplishments

Current

Senior Project Associate

Current

Cognizant

Nov 2024 - Present (1 year 7 months)

Led 2TB+ MySQL→MongoDB migration with optimized schema and indexes, accelerating queries by 40% and improved payment processing via a Vue.js+Django prototype that reduced transaction time by 25%. Built Docker Compose onboarding and an AI RAG fine-tuning tool handling 500K+ monthly queries with 95% accuracy.

MongoDB MySQL Vue.Js Django Docker RAG Fine Tuning Stripe AWS CI CD

Senior Full Stack Developer

Infosys

Jul 2022 - Oct 2024 (2 years 3 months)

Led T-Mobile Customer Care tool supporting 50K+ daily agent sessions with 99.99% uptime, implemented CloudWatch/Dynatrace auto-scaling for 3x traffic spikes, and automated CI/CD to cut deployments by 84%. Optimized DIRECTV APIs, reducing content load by 32% for 10M+ monthly users.

React AWS Cloudwatch Lambda Dynatrace CI CD S3 RDS

Blockchain & Full Stack Developer

Audace Labs

Jun 2021 - Jun 2022 (1 year)

Developed and audited TribeOne Solidity smart contracts, reducing gas costs by 20% and mitigating reentrancy/gas vulnerabilities; integrated React frontends with Web3.js to speed transactions by 30% and implemented backend optimizations that improved performance by 25%.

Solidity Hardhat Web3.js React Smart Contract Auditing Backend

Full Stack Developer

Systenity Infomedia

Jun 2020 - May 2021 (11 months)

Revamped an 8-language portal to increase throughput from 42 RPS to 71 RPS (69%), architected GCP+Supabase backend achieving 99.9% uptime, and led a TypeScript migration across 120K LOC reducing runtime errors by 41%.

GCP Supabase TypeScript GraphQL React Performance Optimization Internationalization Backend

Full Stack Developer

Intelli Sai Consulting

Jun 2017 - Dec 2018 (1 year 6 months)

Built six Java/JS web applications and designed MySQL schemas supporting 100K+ daily records with 99% uptime; resolved 15+ critical bugs, cutting monthly incidents from 22 to 3 (86% reduction).

Java JavaScript MySQL Backend Development System Design REST APIs Performance Tuning

Education

Degrees, certifications, and relevant coursework

Niagara College

Post-secondary Diploma, Computer Engineering Technology

2019 - 2020

Completed a Post-secondary program in Computer Engineering Technology focusing on practical hardware and software integration and applied technical coursework.