Pa K.

I build production-ready AI and SaaS applications using Laravel, Python, React and OpenAI APIs. Across 134 Upwork jobs and 9,400+ hours, I have delivered custom GPT assistants automation platforms, With 17+ years of software engineering experience, 134 Upwork jobs and more than 9,400 Upwork hours, I combine hands-on development, enterprise solution architecture, performance engineering and technical leadership. HOW I CAN HELP • AI integration for Laravel, PHP, Python and enterprise applications • OpenAI, ChatGPT, Custom GPT, Gemini and Claude API integrations • AI assistants, workflow automation, forecasting and reporting • SaaS, CRM, ERP, e-commerce and internal business applications • Laravel, PHP, Python, FastAPI, Core Java and Node js development • React, Vite, Angular, React Native and Expo applications • REST APIs, webhooks and third-party integrations • Database design, migration, optimization and troubleshooting • IBM Product Master upgrades, migration and customization • Enterprise modernization, high availability and production support • Linux, Nginx, Ansible, Jenkins and CI/CD implementation AI, SAAS AND FULL-STACK DEVELOPMENT I develop practical AI solutions that integrate with existing applications, databases and business workflows. My experience includes OpenAI APIs, Custom GPTs, Gemini, Claude, prompt design, data analysis, demand forecasting and business-process automation. I build multi-tenant SaaS platforms, CRM systems, administrative portals, APIs, dashboards and mobile applications using Laravel, PHP, Python, FastAPI, Java, Node js, React, Angular, React Native and Expo. I also implement authentication, role-based access control, subscriptions, audit trails, input validation, API security and reliable webhooks. IBM AND ENTERPRISE TECHNOLOGIES I have extensive experience with IBM Product Master versions 10.1 through 14.x, including upgrades, migration, customization, performance optimization, imports, exports, reports, workflows, collaboration areas, custom tools, data masking and Persona UI troubleshooting. My enterprise experience also includes IBM MDM Director, WebSphere Application Server, Deployment Manager, node agents, clustering, high availability, IBM HTTP Server, load balancers, LDAP, SSO and token validation. I can assist with assessment, planning, sizing, automation, deployment, testing and post-go-live support. DATABASES AND PERFORMANCE • MySQL, IBM DB2 and Oracle • Data modelling, schema design and SQL development • Query optimization, execution analysis and indexing • CPU, locking, deadlock and transaction troubleshooting • Data migration, masking, validation and reconciliation • Database and application performance tuning • High-availability planning and production support • Log analysis, root-cause investigation and incident resolution API, DATA AND PLATFORM INTEGRATIONS • WhatsApp Cloud API, templates and webhooks • HubSpot CRM synchronization • Unleashed ERP and inventory data integration • Make dot com workflow automation • Google Sheets reporting and data pipelines • Email, SMS and business-messaging integrations • CRM, ERP and cloud-service APIs • Scheduled jobs and automated reports DEVOPS AND INFRASTRUCTURE • Ubuntu and Linux server administration • Nginx, PHP-FPM, SSL and DNS configuration • Ansible installation and deployment automation • Jenkins and CI/CD pipelines • VPS and cloud application deployment • Monitoring, logging and service alerting • Security hardening and production troubleshooting • Clustered and high-availability environment support • Application migration, backup and release planning SOLUTION ARCHITECTURE AND DELIVERY I translate business requirements into practical designs, implementation plans and realistic estimates. My experience covers discovery, architecture, development, code review, migration, testing, UAT, deployment, documentation, knowledge transfer and production support. I work effectively with business stakeholders, developers, database administrators, infrastructure teams and product experts. My Agile and Scrum experience helps manage dependencies, communicate risks early and keep delivery aligned with business priorities. WHAT YOU CAN EXPECT • Clear requirements, scope and realistic estimates • Business-focused technical recommendations • Secure, scalable and maintainable architecture • Regular communication and transparent progress • Strong troubleshooting and root-cause analysis • Clean implementation with documentation • Support from planning through deployment I am particularly suitable for businesses that want to integrate AI into an existing application, build a SaaS platform, automate manual processes, improve performance, connect multiple platforms or modernize an enterprise system without unnecessary rebuilding. Send me your technology stack, business objective and main technical challenge. I will review the requirements, identify the risks and recommend the most practical implementation approach.