Hire the Best Backend Rest API Freelancers
in Bangladesh
Dhaka, Bangladesh
Built backend automation platforms processing 1M+ webhook events per month and integrating services such as Shopify, Google Sheets, Mailchimp, Twilio, and custom APIs. I help startups and SaaS companies automate workflows, synchronize data between platforms, and build scalable backend systems using Laravel, Node.js, PostgreSQL, Redis, and modern cloud infrastructure. With 10+ years of software development experience, I specialize in API integrations, webhook processing, queue-based architectures, and business automation systems that operate reliably at scale. ๐๐๐๐ ๐ ๐๐ ๐๐๐๐ ๐๐๐๐ค๐๐ง๐ & ๐๐๐ ๐๐ฒ๐ฌ๐ญ๐๐ฆ๐ฌ โ Laravel, Node.js (NestJS, Express) backend architecture โ Scalable REST APIs & secure backend systems โ Queue systems, retries, idempotency, and fault-tolerant processing โ Multi-tenant SaaS backend infrastructure โ Event-driven systems and webhook processing ๐๐๐ ๐๐ง๐ญ๐๐ ๐ซ๐๐ญ๐ข๐จ๐ง & ๐๐ฎ๐ญ๐จ๐ฆ๐๐ญ๐ข๐จ๐ง โ Stripe, Twilio, Google APIs, Meta APIs โ OAuth2 authentication & secure integrations โ Workflow automation and business process automation โ Multi-service data synchronization and API orchestration โ CRM and operational automation systems ๐๐-๐๐จ๐ฐ๐๐ซ๐๐ ๐๐๐๐ค๐๐ง๐ ๐๐จ๐ซ๐ค๐๐ฅ๐จ๐ฐ๐ฌ โ AI-assisted workflow automation โ OpenAI integrations and AI-powered backend features โ OCR / image-to-text processing pipelines โ AI summarization and intelligent data processing โ Automation systems integrating AI models with business workflows ๐๐จ๐ฆ๐ฉ๐ฅ๐๐ฑ ๐๐๐๐ค๐๐ง๐ ๐๐ฒ๐ฌ๐ญ๐๐ฆ๐ฌ โ Fintech workflows and transactional systems โ ERP and OTA (booking platform) backend systems โ Custom eCommerce backend architecture โ Scalable webhook-driven event systems โ High-volume asynchronous processing systems ๐๐๐๐ ๐๐๐๐๐๐๐ ๐๐๐๐๐๐๐๐๐๐ โ Built webhook orchestration systems processing 1M+ events/month โ Developed scalable API integration platforms with dynamic credentials โ Built queue-based systems with retries and reliable event processing โ Developed automation workflows reducing manual operations โ Built backend systems for SaaS, fintech, eCommerce, and workflow platforms ๐๐๐๐๐๐๐๐ ๐๐๐๐๐๐๐ ๐๐๐๐๐ โ Shopify Workflow Automation Platforms โ AI-Powered Automation Systems โ CRM & Lead Pipeline Automation โ Fintech Rewards & Cashback Platforms โ API Integration & Webhook Infrastructure โ SaaS Backend Platforms โ Custom Business Automation Tools ๐๐๐ ๐ ๐๐๐๐ I approach projects as systems, not isolated features. โ Analyze system flows, bottlenecks, and scalability requirements โ Design clean backend architecture for long-term maintainability โ Build reliable APIs, automations, and event-driven workflows โ Focus on stability, performance, and operational reliability โ Deliver solutions that scale with business growth ๐๐๐๐ ๐๐๐๐๐๐๐๐๐๐๐๐ Backend: Laravel, Node.js, NestJS, Express.js, PHP, TypeScript, JavaScript Databases & Infrastructure: PostgreSQL, MySQL, Redis, MongoDB, Supabase Automation & AI: OpenAI, LangChain, n8n, AI workflows, OCR pipelines Integrations: Stripe, Twilio, Webhooks, OAuth2 APIs, Third-Party Services Cloud & DevOps: AWS, Docker, CI/CD, Git, Microservices Frontend (when needed): React.js, Next.js If you're building a SaaS platform, automation system, API-heavy product, or AI-integrated workflow, I can help you architect and build a reliable backend foundation that scales properly as your business grows. Laravel Developer | PHP Developer | API Integration | REST API | Webhook Development | OAuth2 | Backend Development | SaaS Development | Workflow Automation | Node.js Developer | Express.js | NestJS | PostgreSQL | MySQL | Redis | Queue Systems | Twilio API | Stripe API | OpenAI Integration | CRM Integration | Event-Driven Systems | Docker | AWS
- REST API
- API Development
- Laravel
- Node.js
- API Integration
- PostgreSQL
- Supabase
- JavaScript
- TypeScript
- NestJS
- Stripe
- OAuth
- SaaS Development
- AI Implementation
- Web API
- React
- Next.js
- PHP
- Web Development
- MongoDB
Dhaka, Bangladesh
Top Rated Expert WordPress Website Developer, WooCommerce, and Laravel Developer with 7+ years of experience building high-converting ecommerce websites, business websites, and custom web applications. (You can hire me & create the milestone as a refundable deposit under your control - You can release it only if you are 100% satisfied with the work.) ******** Vibe coding Expert ************ I specialize in Elementor-based WooCommerce stores, checkout optimization, payment gateway integration, and scalable WordPress solutions. For more advanced custom requirements, I also develop Laravel-based platforms, SaaS applications, and custom business systems. โญ 500+ websites completed โญ Top Rated Upwork freelancer โญ Long-term partnerships with agencies and growing brands ๐ก What I Deliver โ WooCommerce store setup & customization โ Conversion-focused product & checkout optimization โ Custom WordPress themes and plugin customization โ Figma to WordPress (pixel-perfect builds) โ Payment gateway integration (Stripe, PayPal, etc.) โ Shipping, tax & subscription setup โ Speed optimization & Core Web Vitals improvements โ Security hardening & safe migration ๐ก Ecommerce Growth & Optimization โ SEO-friendly store structure โ Upsells, cross-sells & cart optimization โ Abandoned cart improvements โ Analytics & tracking setup ๐ก AI Tools & Automation โ Claude โ ChatGPT / OpenAI โ Cursor โ GitHub Copilot โ Lovable โ Base44 โ Zapier โ Make โ n8n โ V0 โ Bolt.new โ Google Gemini ๐ก Used for: โ AI chatbots โ Workflow automation โ Content generation โ Faster website and app development with modern design ๐ก Advanced Custom Solutions When projects require more than a standard store, I also develop scalable custom systems and SaaS platforms using Laravel. ๐ก Tech Stack WordPress, WooCommerce, Elementor, PHP, Laravel, MySQL, REST API, Stripe, PayPal. I build eCommerce websites that donโt just look good โ they convert, scale, and generate revenue. SEARCH ME FOR: WordPress Developer, Website Builder, Elementor Expert, Elementor Pro Developer, WooCommerce Expert, WooCommerce Customization, WooCommerce API Integration, CPT & ACF Expert, Gutenberg Specialist, Kadence Theme Expert, Beaver Builder Developer, Thrive Architect Expert, Speed Optimization, Website Migration, Website Redesign, WPML Multilingual Expert, Security & SSL Setup, Custom Theme Development, Custom Plugin Development, SEO-Friendly Website Hire a WP professional to manage WordPress website and WooCommerce Online Shop. Web Developer for your Web Design and Development, Domain & Hosting, SSL, Security, and optimization requirement. Letโs build a business website that grows your business.
- WordPress
- WordPress Website
- WordPress Website Design
- WordPress Migration
- WordPress Landing Page
- Elementor
- WordPress Customization
- Website Redesign
- Ecommerce Website Development
- Page Speed Optimization
- WooCommerce
- Responsive Design
- Custom Web Design
- HTML5
- Advanced Custom Fields Plugin
- Web Development
- Vibe
- Laravel
- MySQL
- Figma
Dhaka, Bangladesh
I build production-ready Django REST APIs and React frontends for European and US startups โ from greenfield systems to legacy modernization. I've delivered systems trusted by FAO United Nations, KPN Netherlands, and MKB-Jurist (Dutch law firm) โ handling everything from architecture to AWS deployment. โโโ What I Build โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ ๐ง Backend & APIs Django REST Framework, Fastapi, Node.js, scalable REST API design, legacy refactoring, Django ORM optimization, query tuning and indexing โ๏ธ Frontend React.js, TypeScript, TanStack Query, Material UI, Tailwind CSS, Bootstrap, pixel-perfect responsive UI ๐๏ธ Database & Performance PostgreSQL optimization, Redis caching, Celery async tasks, query tuning, indexing strategies โ๏ธ DevOps & Cloud AWS EC2/S3/RDS, Docker, Nginx, CI/CD GitHub Actions, Ansible, Terraform, Linux server management โโโ Why Clients Choose Me โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ โ Delivered for FAO United Nations government portal โ EU clients โ MKB-Jurist Dutch law firm, KPN Netherlands โ Full lifecycle ownership โ architecture to deployment โ Clear daily communication and on-time delivery โ Available for immediate start โโโ Tech Stack โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ Python | Django | DRF | Fastapi | Node.js | React | TypeScript PostgreSQL | Redis | Celery | Docker | AWS | Nginx Ansible | Terraform | GitHub Actions | OpenAI API
- RESTful API
- API Development
- Django
- PostgreSQL
- Web Development
- Docker
- CI/CD
- JavaScript
- Celery
- React
- DevOps
- Ansible
- Amazon Web Services
- Terraform
- Python
- Redis
- Node.js
- LangChain
- FastAPI
- Supabase
Dhaka, Bangladesh
I help startups and businesses build reliable, high-performance mobile apps using Flutter and React Native - from MVP development to App Store launch. My focus is on clean architecture, performance, scalability, and real-world usability. With 6+ years of experience, Iโve delivered reliable iOS and Android applications that are fast, secure, and production-ready. ๐น What I Do โ Cross-platform mobile app development (Flutter & React Native) โ MVP development to App Store & Google Play launch โ Firebase, Stripe, and third-party API integrations โ Scalable, secure, and maintainable mobile app architecture ๐น Apps Iโve Built โข Business & SaaS mobile apps for startups โข eCommerce and marketplace apps with secure payments โข Subscription-based and membership apps โข Social and community apps with real-time features ๐น Why Work With Me โ Top-rated Upwork freelancer โ Google Play Academy Certified App Publisher โ Proven experience launching real apps used by real users โ Clear communication, realistic timelines, and clean delivery If youโre looking for a reliable Flutter or React Native developer who can take your app from idea to launch, Iโd be happy to discuss your project. โก Skills: Flutter, React Native, iOS App Development, Android App Development, UI/UX, Dart, Firebase, REST API, Stripe, PHP, Laravel, App Store Deployment
- REST API
- Flutter
- Smartphone
- Mobile App Development
- App Development
- React Native
- Android App
- iOS Development
- Android App Development
- Firebase
- Dart
- JavaScript
- Modern Style
- User Authentication
- User Profile Creation
Dhaka, Bangladesh
Java & Spring Boot Architect | AI-Powered Backend Systems | 14+ Years Experience I am a Java & Spring Boot architect with 14+ years of hands-on experience building production-grade enterprise systems โ from core banking platforms to AI-integrated microservices. I hold a BSc in Computer Science & Technology and now work as a dedicated full-time freelancer on Upwork, bringing the same rigour I applied in large fintech institutions directly to client projects. My core expertise spans Spring Boot, Spring Framework, and microservices architecture, with deep practical knowledge of SSO & Keycloak, Docker, DevOps pipelines, and GitLab CI/CD. I design systems that are secure, observable, and built to scale โ whether that means integrating Kafka for event-driven flows, Flowable BPMN for workflow automation, or AWS for cloud infrastructure. Over the past year I have been heavily invested in the AI/LLM frontier: building Spring AI applications, wiring up MCP (Model Context Protocol) servers, running local models via Ollama, and implementing advanced patterns like tool calling, RAG pipelines, and AI agent workflows. I see AI not as a separate layer but as a first-class citizen inside enterprise Java backends. If you need someone who understands both the old-school reliability of enterprise Java and the new possibilities of AI-augmented architecture โ let's talk. CORE STACK: Java ยท Spring Boot ยท Spring Framework ยท Microservices ยท REST API ยท Keycloak/SSO ยท Docker ยท GitLab CI/CD ยท DevOps ยท Kafka ยท Flowable BPMN ยท Oracle ยท PostgreSQL ยท AWS ยท Angular AI & EMERGING TECH: Spring AI ยท MCP ยท Ollama ยท Tool Calling ยท AI Agents ยท RAG Pipelines ยท pgvector ยท LLM Integration ยท OpenAI API ยท Prompt Engineering DOMAINS: Banking & Fintech ยท SWIFT/ISO 8583 ยท AML/CFT Compliance ยท NPSB/RTGS ยท ATM Switch ยท eKYC ยท Healthcare/EMR ยท Document Management
- RESTful Architecture
- Spring Security
- Spring Boot
- Java Persistence API
- Microservice
- Hibernate
- JasperReports
- Java
- GitLab
- DevOps
- Apache Kafka
- Android
- Object-Relational Mapping
- Angular 6
- Google Sheets
Dhaka, Bangladesh
I help startups, agencies, and businesses build secure, scalable, and high-performance web applications using modern technologies and AI-assisted development workflows. With strong experience in backend engineering, API development, cloud infrastructure, and frontend frameworks, I deliver clean, maintainable solutions that are fast, reliable, and production-ready. What I Can Help You With โ Custom Web Application Development โ REST API & GraphQL Development โ SaaS Platforms & Business Systems โ AI-Assisted Development & Automation โ Third-Party API Integrations โ Performance Optimization & Security Hardening โ Legacy System Upgrade & Modernization โ Cloud Deployment & DevOps Setup Backend & Web Technologies โข Laravel, Django, Spring Boot, Yii2 โข Express.js, NestJS โข WordPress, Drupal, Magento โข PHP, Python, Java, JavaScript, TypeScript โข MySQL, PostgreSQL, MongoDB, Redis Frontend Development โข React.js, Vue.js โข Tailwind CSS, Bootstrap โข Alpine.js, Livewire, HTMX Cloud & DevOps โข AWS, GCP โข Docker, Kubernetes โข CI/CD Pipelines โข Linux, Nginx, Apache API & Integrations โข Stripe, PayPal โข Twilio, Firebase โข Slack, Zapier, Xero โข REST APIs & GraphQL AI Development Workflow I actively use modern AI development tools to improve delivery speed, code quality, debugging, and architecture planning: โข Cursor โข Claude โข ChatGPT โข GitHub Copilot Why Clients Work With Me โ Clean, maintainable, scalable code โ Fast communication & reliable delivery โ Strong debugging and problem-solving skills โ Production-ready deployment experience โ Security-focused development approach โ Ability to work independently and take ownership Whether you need a custom platform, backend API, cloud deployment, or ongoing development support, I can help turn your ideas into reliable software solutions. Letโs build something great together.
- API Development
- MySQL
- PHP
- Laravel
- Python
- Django
- CakePHP
- Yii
- .htaccess File Creation
- Ubuntu
- Apache HTTP Server
- Node.js
- Java
- Spring Boot
- Flask
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