Senior Backend Architect PHP/Laravel Payments

SUJAY BHATTACHARYA

Behala, Kolkata, West Bengal, India +91-891******* ***********@*****.***

LinkedIn: linkedin.com/in/sujay-bhattacharya-6070048 RESUME HEADLINE

Senior Software Developer Backend Architect PHP Expert Laravel (8+ years) • MySQL • REST APIs • Payment Gateways (Stripe, NMI, CCBill, BTCPay) 19+ Years Experience

PROFESSIONAL SUMMARY

Accomplished Senior Backend Engineer and Architect with 19+ years of software engineering experience, specializing in high-scale PHP (15+ years) and enterprise Laravel ecosystems (8+ years). Proven track record of architecting scalable applications, designing secure cloud storage solutions (AWS S3, DigitalOcean), and seamlessly integrating modern Vite and React architectures within Laravel Blade systems. Deeply experienced in implementing complex payment infrastructures, spanning traditional gateways (Stripe, NMI, CCBill) and cryptocurrency APIs

(BTCPay Server). Over a decade of direct client-facing experience, combining technical leadership and team mentorship with the ability to bridge the gap between business needs and clean code. Ahead of the curve in using GenAI tools to speed up development and solve tough engineering challenges.

CORE TECHNICAL CAPABILITIES

• Architectures & Frameworks: Laravel (v4.5 up to v12), CakePHP, Custom Python Frameworks, MVC Design Patterns

• Core Languages: PHP, Python, JavaScript

• Frontend & Optimization: React, Vite, jQuery, Ajax, Laravel Blade Layouts

• Databases & Systems: MySQL, PostgreSQL, Relational Schema Optimization, Query Indexing, Performance Tuning, Caching

• APIs & Payment Systems: RESTful API Design, Webhooks, Stripe Connect, Stripe Subscriptions, NMI, CCBill, BTCPay Server (Bitcoin)

• Cloud, DevOps & Tools: AWS S3, DigitalOcean Spaces, BigCommerce, Git, Linux, FFmpeg Media Transcoding, GenAI Prompting Models

• Engineering Leadership: Technical Mentorship, Code Auditing, Stakeholder Management, Risk Mitigation

PROFESSIONAL EXPERIENCE

Senior Software Developer (Jul 2016 – May 2026)

Delta India Solutions

Designed, developed, and delivered key application modules for enterprise web applications, including DomainerSuite, ShiftSee, and VelvetRope/MyVIPFantasy, contributing to scalable and maintainable Laravel-based solutions.

Architected decoupled React and Vite frontends seamlessly integrated into native Laravel structures, drastically boosting front-end optimization.

Engineered secure payment processing layers, integrating traditional gateways (Stripe, NMI, CCBill) and decentralized cryptocurrency networks via BTCPay Server APIs.

Maintained, refactored, and updated Python-centric data applications based on business intelligence goals.

Formulated deep database query optimization and sophisticated table indexing strategies, reducing response latency under heavy traffic.

Interacted directly with global clients to capture technical requirements, propose system solutions, and ensure high-satisfaction delivery.

Leveraged enterprise generative AI capabilities (ChatGPT, Claude Sonnet models) into core development pipelines, accelerating prototyping velocity and unit-testing efficiency. Senior Software Developer (Jan 2010 – May 2016)

Randem IT Pvt. Ltd.

Took a leading role in the end-to-end development and maintenance of the flagship HSC Hub e-learning platform, working completely one-on-one with the client to manage requirements, while directly instructing the project's design resources to ensure seamless delivery.

Served as Technical & UI Lead for enterprise BigCommerce setups, successfully directing a cross-functional team of 3 developers and 3 designers to deliver high-scale e-commerce solutions for the organization.

Co-engineered the Dungeon Crawl project in a high-efficiency 2-person team, architected and programmed a custom "Intellipricer" module, leveraging the eBay REST API to extract real-time market data, calculate optimal product price points, and automatically update the database.

Drove the integration of modern PHP frameworks like CakePHP to the company, moving legacy codebases to MVC pattern architectures to improve code structure and modularity.

Upskilled and mentored engineering peers in advanced tools, including Zend Framework, CakePHP, and complex regex architectures.

Spearheaded legacy transitions from on-premise infrastructure into scalable AWS S3 cloud environments for dynamic file management.

Software Developer (Oct 2007 – Jan 2010)

Navigators Software Pvt. Ltd.

Managed multiple concurrent web platform iterations while serving as the primary liaison for delivery coordination.

Interacted directly with Swiss stakeholders to scope, design, and maintain the Bball web application infrastructure.

Learned and implemented Ruby on Rails to develop and maintain core web platforms alongside the development team.

Developed the Facecontact job portal integrating third-party tools (Octazen and Plaxo) to safely import and parse contact data.

Coordinated directly between the project manager and global clients, providing regular progress updates, risk assessments, and project status tracking. Software Developer (Feb 2007 – Oct 2007)

Sundew Solutions

Contributed core backend logic to build, test, and safely deploy an enterprise-grade Online Nurse Management System.

Analyzed business requirements to write clean, customized application source code meeting strict quality management guidelines.

Constructed relational database schemas focusing on table integrity and optimal performance scaling.

Executed comprehensive unit testing across staging environments to validate deployment stability and provided daily sprint updates to The team Lead. FEATURED ENTERPRISE DEPLOYMENTS

• ShiftSee Delta India Solutions (shiftsee.com): Laravel 12, React, Vite, MySQL, Stripe Connect. Built an enterprise-grade shift workforce management portal with automated split- payout structures.

Key Integrations: Constructed frontend architectures using React and Vite seamlessly integrated with Laravel Blade for dynamic interfaces. Deployed Stripe Connect APIs to facilitate split payment processing and mechanized direct payouts from business accounts to connected worker accounts.

• Private School Brokers Delta India Solutions : A global marketplace for buying and selling private schools. Formulated complex backend filtering logic and built an automated matching engine that evaluates custom search criteria to dynamically generate and email relevant buyer/seller prospect lists. Integrated Stripe Subscriptions to deploy a secure, digitized recurring billing layer for buyer accounts.

Stack: Laravel, MySQL, Stripe API, jQuery, JavaScript.

• DomainerSuite Delta India Solutions (domainersuite.com): Laravel 4.5, MySQL, Namesilo & Textbroker APIs. Incorporated third-party services including Namesilo for domain automation, Textbroker for content provisioning, and Stripe for recurring subscription billing.

• MyVIPFantasy / VelvetRope Delta India Solutions (myvipfantasy.com): Laravel 10.1, MySQL, jQuery, Sanctum, Twilio, BTCPay Server API. A social networking and content-sharing platform enabling users to launch customized, subdomain-based profile pages, publish multimedia articles, and interact via real-time chat. Core Execution: Administered client communications and requirement analysis to drive full-stack development using Laravel architectures.

Integrations & Security: Deployed Twilio and Telnyx APIs for robust SMS communication, alongside SightEngine APIs for computerized, real-time multimedia content moderation and filtering to detect nudity, violence, hate, and drug-related content. Payment Processing: Evolved platform payment architectures over time, starting with a Stripe integration for VelvetRope, and subsequently deploying NMI, CCBill, and BTCPay Server

(Bitcoin) solutions for MyVIPFantasy to satisfy changing client payment processing requirements. Mobile Support: Designed securely backend RESTful APIs utilizing Laravel Sanctum authentication to power seamless mobile application integration. EDUCATION & CREDENTIALS

• Master of Computer Applications (MCA) – Indira Gandhi National Open University (IGNOU)

• Post BSc Application-Oriented Course in Computer Science – University of Burdwan

• Bachelor of Science (BSc) – University of Calcutta

• Higher Secondary — Cathedral Mission High School

• Secondary Education — Cathedral Mission High School LANGUAGES

English (Professional Proficiency), Hindi (Conversational), Bengali (Native)

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