Karthik Raj

Full Stack Developer with 3 years of experience building scalable web applications using Python, Node.js, Next.js, and Laravel. Specialized in backend API development, performance optimization, and real-time systems using WebSockets. Improved application performance by up to 40% and handled 10,000+ monthly transactions through secure payment integrations. Experienced in Waterfall development, CI/CD practices, and modern web architecture.

Web Developer - Pixel Web Solutions - Madurai, Tamil Nadu

(2025-06 - 2026-05)

• Architected and developed high-performance web applications using Next.js and Python, achieving 30% improvement in page load speed through code splitting and SSR optimization
• Designed and implemented scalable RESTful APIs with Python and Next.js; optimized database queries reducing API response time by 40%
• Integrated Web3 wallet (MetaMask) and developed real-time crypto trading features using WebSockets and blockchain smart contracts
• Collaborated with a 6-person cross-functional waterfall team across bi-weekly sprints, maintaining zero critical production incidents

Full Stack Web Developer - Zenskar Software Solution - Madurai, Tamil Nadu

(2023-09 - 2025-05)

• Built and maintained responsive, scalable web applications using Laravel, Python, and MySQL, supporting 1,000+ concurrent users
• Integrated Razorpay and CCAvenue payment gateways, processing 10,000+ secure monthly transactions with full error handling and webhook support
• Optimized MySQL database performance by implementing indexing strategies and schema normalization, reducing query execution time by 35%

Team Lead - Mak Infotech - Madurai, Tamil Nadu

(2019-04 - 2023-08)

• Led and managed a team of 10+ specialists; introduced process automation workflows reducing manual tasks by 45%
• Maintained 99.8% data accuracy across 500,000+ monthly records with zero data-loss incidents through rigorous QA and audit processes

Data Entry Operator - RJ Solutions - Madurai, Tamil Nadu

(2015-09 - 2019-03)

• Maintained large datasets with 99.8% accuracy

B.Sc. - Computer Science - MSS Wakf Board College (2012 - 2015)

HSC - Higher Secondary - M.N.U. Jayaraj Nadar Higher Secondary School (2010 - 2012)

SSLC - Secondary School - Thiagarajar Model Higher Secondary School (2009 - 2010)