SaaS / ERP Development
Build scalable SaaS & ERP systems with clean architecture, modules, and long-term maintainability.
- Multi-tenant & role-based access
- Reporting dashboards & automation
- Performance & database optimization
LaravelMySQLSaaSERP
🟢 Open to Work • FreelanceERPSaaSAI AutomationLaravel • REST APIsPayments • CI/CD
Hi there!I amMd. Kamrul Hasan
Laravel Developer & Full-Stack Software Engineer building SaaS/ERP systems, AI chatbots & AI agents, and scalable REST APIs with secure integrations, payment gateways, and performance optimization.
📍 Gazipur, Dhaka, Bangladesh✉ dev.kaamrul@gmail.com🤝 Trusted by 18+ clients✅ 45+ projects👥 5000+ users supported
Let’sConnect
AI CapabilitiesChatbots • Agents • Automations
LLM IntegrationRAGPrompt EngineeringWorkflow Automation
Build AI-powered features like customer support chatbots, internal knowledge assistants, and automation agents on top of your Laravel/SaaS systems.
Services
What I can build for you — product-focused engineering with clean delivery.
AI Chatbots & AI Agents
Integrate LLM-powered chatbots & agent workflows for customer support, internal assistants, and automation.
- LLM API integration + guardrails
- RAG / knowledge-base assistants
- Workflow automation + audit logs
OpenAI APIPrompt EngineeringRAGAutomation
REST APIs & Integrations
Design robust APIs and connect payments, third-party tools, and services safely.
- API design, versioning & docs
- Payment gateways & webhooks
- Secure auth flows (JWT/session)
REST APIsPaymentsWebhooksAuth
DevOps & Deployment
Ship confidently with CI/CD pipelines, VPS deployment, Docker basics, and uptime-first practices.
- CI/CD setup (GitHub Actions)
- VPS deployment + monitoring
- Rollback strategy + environment hardening
CI/CDLinuxVPSDocker
Security & Best Practices
Harden applications with practical security improvements and safe authentication patterns.
- RBAC / permissions & policy checks
- Rate limiting + brute-force protection
- Secure sessions, tokens & validation
SecurityRBACRate LimitingAuth
Performance & Optimization
Improve speed, stability, and scalability for production systems.
- Query optimization + caching
- Profiling bottlenecks & refactor
- Scalable architecture improvements
PerformanceCachingOptimizationScalability
Want to discuss your project?
Message me from the contact section — or book a call if you prefer.
Trusted by teams building products at scale
SaaS • ERP • Automation • Integrations
SaaS Teams
ERP Operations
E-Commerce
Global Clients
Partners
Projects
Selected work — products, systems, and experiments I’ve shipped.
Built and integrated an AI customer support chatbot using LLM APIs with intent detection, smart response orchestration, and human handoff — designed for faster resolution and consistent answers across channels.
- Automated FAQ + support replies
- Improved response consistency
- Handoff to agents with full context
AI ChatbotLLMOpenAI APIREST APIsAutomation
Developed AI agent workflows to automate repetitive business operations with API-first architecture, structured prompts, tool-calling patterns, and audit-friendly logs for traceability.
- Reduced manual operational tasks
- Workflow automation with traceable logs
- Reusable agent pipeline for multiple use-cases
AI AgentAutomationWorkflowAPIsPrompt Engineering
Employee Live Tracking Platform
2024 • Backend Engineer • Live
Real-time workforce monitoring, attendance accuracy improvements, and operational visibility dashboards.
- Improved attendance visibility
- Operational reporting
- Tracking workflows
LaravelREST APIsMySQLReal-time
Garments ERP (Inventory • Production • HR • Supply Chain)
2023–2024 • Backend Engineer • Delivered
ERP modules and reporting to streamline garment operations and reduce manual data processing.
- Streamlined operations
- Reduced manual reporting
- Improved workflow visibility
LaravelERPMySQLPerformance
SaaS Platforms (CRM • POS • E-commerce • LMS)
2023–2025 • Full-stack Developer • Multiple Deployments
Multi-tenant SaaS solutions with secure integrations, automation, and payment gateway connectivity.
- Multi-tenant architecture
- Secure integrations
- Automation workflows
SaaSAPIsPaymentsCI/CD
Case Study Ready
Want a 2-minute breakdown of how I ship?
I can walk you through a real delivery: architecture decisions, security checklist, performance wins, and how AI automation fits into SaaS/ERP systems — so you can estimate timeline & cost fast.
SaaS / ERP ModulesREST APIs + PaymentsAI Chatbots / AgentsCI/CD + Deployment
Backend Architecture
Modules • DB design • scalability planning
AI Automation Layer
Tool-calling • RAG • audit logs & guardrails
Skills & Experience
A focused skill matrix + a timeline of roles, delivery, and impact.
Programming Languages
PHP
JavaScript
Frameworks / Libraries
Laravel
Vue.js
React.js
Next.js
Tailwind CSS
Bootstrap
AI & Automation
AI Chatbot Development
AI Agent Systems
LLM API Integration
•
Prompt Engineering
DevOps & Tools
Git
Linux
VPS Deployment
CI/CD
Docker (basic)
Jira
OPTICODEX, Bangladesh
Team Lead (Full Stack)
Feb 2026 — Present • Dhaka, Bangladesh (Remote)
Leading delivery across multiple products with a focus on scalability, security, reliability, and maintainable architecture.
- Leading end-to-end development and delivery across multiple products, improving engineering quality through reviews, standards, and clear technical documentation.
- Community App: supporting 5,000+ users with real-time chat, notifications, and audio/video calling; improved engagement and platform responsiveness through performance optimizations.
- Employee Live Tracking System: delivered real-time monitoring features to improve attendance accuracy and operational visibility for workforce operations.
- Garments ERP: contributed to Inventory, Production, HR, and Supply Chain modules, reducing manual effort and improving reporting workflows.
LaravelPHPREST APIsMySQLJavaScriptCI/CDLinux/VPS
Full Stack Developer (Remote)
Jan 2025 — Jan 2026 • Dhaka, Bangladesh (Remote)
Built and maintained business-critical modules with emphasis on secure API design, performance, and iterative agile delivery.
- Built and maintained core modules with secure API design patterns, validation, and role-based access workflows.
- Employee Live Tracking: implemented core tracking features and reporting dashboards to improve operational visibility.
- Garments ERP: delivered multiple modules and integrations to streamline cross-department workflows.
- Collaborated with product and operations stakeholders; shipped features iteratively under agile delivery cycles.
LaravelPHPREST APIsMySQLJavaScriptGit
Web Solution Firm, Bangladesh
Full Stack Developer
Mar 2021 — Dec 2025 • Dhaka, Bangladesh
Delivered high-quality web and SaaS solutions for local and international clients with a strong track record of on-time delivery.
- Delivered 45+ web and SaaS projects for local and international clients, ensuring quality, maintainability, and on-time delivery.
- Built platforms including SaaS e-commerce, CRM, POS, Medical ERP, Fundraising systems, and LMS solutions.
- Designed and integrated REST APIs and third-party services, including payment gateways and automation workflows.
- Improved reliability and UX through performance tuning, refactoring, and clean architecture practices.
LaravelPHPMySQLVue.jsReact.jsREST APIsPayment Gateways
Programming Languages
PHP
JavaScript
Frameworks / Libraries
Laravel
Vue.js
React.js
Next.js
Tailwind CSS
Bootstrap
AI & Automation
AI Chatbot Development
AI Agent Systems
LLM API Integration
•
Prompt Engineering
DevOps & Tools
Git
Linux
VPS Deployment
CI/CD
Docker (basic)
Jira
Achievements
Highlights, awards, certifications, and notable wins.
Awards
Employee of the Quarter
Q2 2024 • Tech Solutions Ltd.
Recognized for leading the successful delivery of a high-scale AI chatbot platform used by 10k+ monthly users.
- Reduced API response time by 35%
- Delivered production-ready AI chatbot with LLM integration
- Mentored 2 junior developers during the project
LaravelVue.jsOpenAI API
Hackathon Finalist
2023 • National Dev Hack 2023 • Dhaka, Bangladesh
Built an AI-powered ticket automation system within 36 hours.
- Designed backend architecture in Laravel
- Integrated LLM API for smart ticket classification
- Implemented real-time dashboard using Vue.js
LaravelMySQLVue.jsLLM API
Certifications
Docker & DevOps Fundamentals
2023 • Udemy
Hands-on certification covering containerization, deployment workflows, and CI/CD basics.
- Built multi-container apps using Docker Compose
- Configured CI/CD pipeline with GitHub Actions
- Deployed production app on VPS
DockerLinuxCI/CD
Advanced JavaScript & React
2022 • Frontend Masters
In-depth training on modern React architecture, performance optimization, and state management.
- Optimized React app performance by memoization
- Implemented reusable component architecture
- Improved UX through advanced hooks usage
JavaScriptReact.jsNext.js
Highlights
AI Agent System Deployment
2025 • Client Project
Successfully deployed an AI multi-agent system handling automated client onboarding workflows.
- Designed prompt engineering flow
- Integrated OpenAI API securely
- Implemented authentication & role-based access control
LaravelOpenAIAuthenticationSecurity
Education
Academic background, certifications, and learning milestones.
IUBAT - International University of Business Agriculture and Technology, Bangladesh
BSc in Computer Science & Engineering
2015 — 2018 • CSE • CGPA 3.37 / 4.00
Focused on software engineering, web development, and database systems.
- Final year project: AI-powered support chatbot
- Active in programming contests and team projects
JavaScriptPHPMySQL