Senior Backend Developer (PHP/Laravel/Node)

DEEPAK KUMAR

Senior PHP / Laravel Backend Developer

+91-896******* ************@*****.*** Mohali, Punjab (140301) linkedin.com/in/deepak-a4185b193 github.com/deep524aujla Availability: Immediate Joiner PROFESSIONAL SUMMARY

Backend Engineer with 5+ years of experience specializing in optimizing high-traffic database engines, upgrading legacy enterprise codebases, and building scalable SaaS systems. Proficient in engineering robust architectures using PHP, Laravel, and Node.js alongside AWS cloud infrastructure. Pragmatic practitioner of AI-assisted engineering tools

(Cursor, Copilot) to accelerate shipping cycles while maintaining rigorous code quality, security standards (DAST), and application performance.

TECHNICAL SKILLS

Backend: PHP (Laravel, CodeIgniter, Yii2, Symfony), Node.js, REST APIs, Microservices, E-commerce Architectures

Frontend: React.js, JavaScript, jQuery, AJAX, HTML5, CSS3 Database & Caching: MySQL, MongoDB, Redis Caching, Query Optimization, Database Indexing & Schema Design

Cloud & DevOps: AWS (S3, EC2, RDS), Docker, CI/CD Deployment Pipelines, Git, Linux, Apache Security & Testing: DAST Vulnerability Remediation (XSS, SQL Injection), RBAC Design, Unit Testing AI-Assisted Workflows: Cursor AI, GitHub Copilot (Advanced Prompting for Rapid Prototyping & Code Refactoring) PROFESSIONAL EXPERIENCE

Senior PHP Developer (Contract) Upgrad Education Limited, Mumbai Oct 2025 – Jul 2026

• Executed application modernization blueprints for the CMA CGM logistics business unit, successfully upgrading enterprise applications across legacy Core PHP, Symfony, CodeIgniter, and older Laravel versions to modern runtimes.

• Remediated critical security vulnerabilities identified by Dynamic Application Security Testing (DAST), resolving 10+ major XSS and SQL Injection flaws across 8 production modules.

• Optimized heavy database query pipelines using chunking and pagination to eliminate recurrent server time-outs on complex multi-country logistics datasets.

• Collaborated with DevOps teams using Docker to standardize local environments and match secure AWS infrastructure standards to minimize deployment risks.

Core Laravel Developer Code Brew Labs, Chandigarh Apr 2023 – Aug 2025

• Resolved catastrophic page latency and server timeouts on a high-volume enterprise e-commerce platform by profiling, restructuring, and fixing complex N+1 query bottlenecks.

• Engineered database optimization mechanisms, implementing strategic column indexing for high-frequency filtration and chunked data delivery via AJAX.

• Integrated Redis caching layers into production, driving first-time page load speeds down from 10–20 seconds to a stable 4–5 seconds under concurrent user traffic.

• Designed multi-tenant RBAC (Role-Based Access Control) modules, safely managing data isolation and authentication structures across 5 distinct system roles.

• Mentored 2–5 junior developers on REST API development protocols, structural code review strategies, and standard AI assistant code validation loops.

Software Developer ToXSL Technologies Pvt. Ltd., Mohali Feb 2021 – Mar 2023

• Maintained and optimized enterprise PHP/Laravel and Yii2 production systems serving an active user base of over 10,000+ daily profiles.

• Integrated 4 major global payment gateways (Stripe, MTN, DPO, Airtel Money), engineering asynchronous webhook confirmation steps to secure multi-region transactional operations.

• Contributed to routine code reviews, ensuring structural MVC patterns, data validation rules, and REST API standardizations across engineering teams.

TECHNICAL PROJECTS

Enterprise Logistics & Legacy Modernization System (PHP, Laravel, Symfony, MySQL, AWS)

• Led version upgrades for cross-framework dependencies to align older infrastructure with modern cloud configurations.

• Closed high-severity DAST vulnerabilities, creating a sanitized codebase resilient against cross-site scripting (XSS) and SQL injection.

Multi-Tenant E-Commerce & Vendor Management Platform (Laravel, React.js, Node.js, Redis, MySQL)

• Constructed a highly interactive multi-tenant administrative engine using React.js for frontend state management, backed by decoupled Laravel microservices.

• Deployed low-latency communication mechanisms by linking Node.js WebSockets with Laravel event loops to transmit push updates instantly.

High-Performance Job Portal Engine (Laravel, React.js, MySQL, Redis, Laravel Queues)

• Architected a data-heavy recruitment platform pairing a responsive React.js search dashboard with an optimized MySQL backend.

• Offloaded heavy recommendation matching scripts to background processes via Laravel Queues, ensuring zero-block interface behavior.

EDUCATION & CERTIFICATIONS

MBA (IT Systems Management) — SVKM's NMIMS 2021 – 2023 B.E. Information Technology — Chandigarh University 2017 – 2021 PHP Developer Certification — ToXSL Technologies

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