Tapas Datta

- Built and scaled Sales & Lead Management modules for a US CRM, improving pipeline tracking and usability. - Integrated third-party APIs for scheduling and communication, streamlining customer interactions. - Implemented OpenAI function calling to connect internal services and product data, enhancing customer experience. - Developed a payment module for Swiss e-commerce, integrating Facebook Conversion and Google Analytics APIs for accurate, unified sales reporting.

- Built SaaS features in Laravel with Domain-Driven Design, improving scalability and maintainability. - Developed RabbitMQ task system, increasing throughput 60% and reducing errors 35%. - Integrated Stripe recurring billing via Laravel Cashier, minimizing payment issues. - Designed Golang LFU rate limiter for 500K+ API calls/day, cutting external API costs. - Refactored monolith MVP into a modular monolith, boosting team efficiency.

- Built a microservice job platform (Go, Laravel, AWS Lambda, PostgreSQL) scaling to 500K+ daily users. - Developed cache-first APIs (MySQL/Firebase), cutting response times by 40% under high load. - Delivered a modular-monolith price comparison system (Laravel/PostgreSQL/DynamoDB) with microservices. - Reduced infra costs by enabling AWS auto-scaling and stateless service design. - Built REST APIs for 2M+ IoT devices with event-driven queues and failover protection.

- Built a sales & ROI app (Laravel/MySQL) with analytics that improved client growth insights. - Created a marketing automation tool delivering personalized reports, speeding up onboarding. - Engineered a scalable survey platform (Laravel/JS/APIs), boosting data accuracy and UX. - Delivered and supported a micro-CRM for a German swimming school, enhancing operations. - Managed AWS deployments with automation and tuning, improving uptime and reducing costs.