Hire the Best Backend Rest API Freelancers
in Bangladesh

Clients rate our Backend Rest API professionals
Rating is 4.7 out of 5.
4.7/5
Based on 188 client reviews
MD Rifatul I.

Dhaka, Bangladesh

$11/hr
5.0
16 jobs

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. ๐–๐‡๐€๐“ ๐ˆ ๐ƒ๐Ž ๐’๐š๐š๐’ ๐๐š๐œ๐ค๐ž๐ง๐ & ๐€๐๐ˆ ๐’๐ฒ๐ฌ๐ญ๐ž๐ฆ๐ฌ 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 ๐€๐๐ˆ ๐ˆ๐ง๐ญ๐ž๐ ๐ซ๐š๐ญ๐ข๐จ๐ง & ๐€๐ฎ๐ญ๐จ๐ฆ๐š๐ญ๐ข๐จ๐ง 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 ๐€๐ˆ-๐๐จ๐ฐ๐ž๐ซ๐ž๐ ๐๐š๐œ๐ค๐ž๐ง๐ ๐–๐จ๐ซ๐ค๐Ÿ๐ฅ๐จ๐ฐ๐ฌ 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 ๐‚๐จ๐ฆ๐ฉ๐ฅ๐ž๐ฑ ๐๐š๐œ๐ค๐ž๐ง๐ ๐’๐ฒ๐ฌ๐ญ๐ž๐ฆ๐ฌ 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 ๐‘๐„๐€๐‹ ๐๐‘๐Ž๐‰๐„๐‚๐“ ๐„๐—๐๐„๐‘๐ˆ๐„๐๐‚๐„ 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 ๐’๐„๐‹๐„๐‚๐“๐„๐ƒ ๐๐‘๐Ž๐‰๐„๐‚๐“ ๐“๐˜๐๐„๐’ 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 ๐‡๐Ž๐– ๐ˆ ๐–๐Ž๐‘๐Š 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 ๐‚๐Ž๐‘๐„ ๐“๐„๐‚๐‡๐๐Ž๐‹๐Ž๐†๐ˆ๐„๐’ 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
Maidul I.

Dhaka, Bangladesh

$9/hr
4.9
64 jobs

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 ๐Ÿ’ก What I Deliver โœ” WooCommerce store setup & customization โœ” Conversion-focused product & checkout optimization โœ” Custom WordPress themes and plugin customization โœ” Figma to WordPress (pixel-perfect builds) โœ” Payment gateway integration (Stripe, PayPal, etc.) โœ” Shipping, tax & subscription setup โœ” Speed optimization & Core Web Vitals improvements โœ” Security hardening & safe migration ๐Ÿ’ก Ecommerce Growth & Optimization โœ” SEO-friendly store structure โœ” Upsells, cross-sells & cart optimization โœ” Abandoned cart improvements โœ” Analytics & tracking setup ๐Ÿ’ก AI Tools & Automation โœ” Claude โœ” ChatGPT / OpenAI โœ” Cursor โœ” GitHub Copilot โœ” Lovable โœ” Base44 โœ” Zapier โœ” Make โœ” n8n โœ” V0 โœ” Bolt.new โœ” Google Gemini ๐Ÿ’ก Used for: โœ” AI chatbots โœ” Workflow automation โœ” Content generation โœ” Faster website and app development with modern design ๐Ÿ’ก Advanced Custom Solutions When projects require more than a standard store, I also develop scalable custom systems and SaaS platforms using Laravel. ๐Ÿ’ก Tech Stack WordPress, WooCommerce, Elementor, PHP, Laravel, MySQL, REST API, Stripe, PayPal. I build eCommerce websites that donโ€™t 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. Letโ€™s 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
MD. Fakhrul Islam F.

Dhaka, Bangladesh

$12/hr
5.0
4 jobs

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. โ”€โ”€โ”€ What I Build โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€ ๐Ÿ”ง Backend & APIs Django REST Framework, Fastapi, Node.js, scalable REST API design, legacy refactoring, Django ORM optimization, query tuning and indexing โš›๏ธ Frontend React.js, TypeScript, TanStack Query, Material UI, Tailwind CSS, Bootstrap, pixel-perfect responsive UI ๐Ÿ—„๏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 โ”€โ”€โ”€ Why Clients Choose Me โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€ โœ… Delivered for FAO United Nations government portal โœ… EU clients โ€” MKB-Jurist Dutch law firm, KPN Netherlands โœ… Full lifecycle ownership โ€” architecture to deployment โœ… Clear daily communication and on-time delivery โœ… Available for immediate start โ”€โ”€โ”€ Tech Stack โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€ 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
Md.Rajibul A.

Dhaka, Bangladesh

$10/hr
4.8
110 jobs

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, Iโ€™ve delivered reliable iOS and Android applications that are fast, secure, and production-ready. ๐Ÿ”น What I Do โœ” Cross-platform mobile app development (Flutter & React Native) โœ” MVP development to App Store & Google Play launch โœ” Firebase, Stripe, and third-party API integrations โœ” Scalable, secure, and maintainable mobile app architecture ๐Ÿ”น Apps Iโ€™ve Built โ€ข Business & SaaS mobile apps for startups โ€ข eCommerce and marketplace apps with secure payments โ€ข Subscription-based and membership apps โ€ข Social and community apps with real-time features ๐Ÿ”น Why Work With Me โœ” Top-rated Upwork freelancer โœ” Google Play Academy Certified App Publisher โœ” Proven experience launching real apps used by real users โœ” Clear communication, realistic timelines, and clean delivery If youโ€™re looking for a reliable Flutter or React Native developer who can take your app from idea to launch, Iโ€™d be happy to discuss your project. โšก 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
Sanjoy K.

Dhaka, Bangladesh

$25/hr
4.1
18 jobs

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
S.M. ATAUL KARIM R.

Dhaka, Bangladesh

$10/hr
4.8
70 jobs

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 โœ… Custom Web Application Development โœ… REST API & GraphQL Development โœ… SaaS Platforms & Business Systems โœ… AI-Assisted Development & Automation โœ… Third-Party API Integrations โœ… Performance Optimization & Security Hardening โœ… Legacy System Upgrade & Modernization โœ… Cloud Deployment & DevOps Setup Backend & Web Technologies โ€ข Laravel, Django, Spring Boot, Yii2 โ€ข Express.js, NestJS โ€ข WordPress, Drupal, Magento โ€ข PHP, Python, Java, JavaScript, TypeScript โ€ข MySQL, PostgreSQL, MongoDB, Redis Frontend Development โ€ข React.js, Vue.js โ€ข Tailwind CSS, Bootstrap โ€ข Alpine.js, Livewire, HTMX Cloud & DevOps โ€ข AWS, GCP โ€ข Docker, Kubernetes โ€ข CI/CD Pipelines โ€ข Linux, Nginx, Apache API & Integrations โ€ข Stripe, PayPal โ€ข Twilio, Firebase โ€ข Slack, Zapier, Xero โ€ข REST APIs & GraphQL AI Development Workflow I actively use modern AI development tools to improve delivery speed, code quality, debugging, and architecture planning: โ€ข Cursor โ€ข Claude โ€ข ChatGPT โ€ข GitHub Copilot Why Clients Work With Me โœ” Clean, maintainable, scalable code โœ” Fast communication & reliable delivery โœ” Strong debugging and problem-solving skills โœ” Production-ready deployment experience โœ” Security-focused development approach โœ” 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. Letโ€™s 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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