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Rating is 4.9 out of 5.
4.9/5
Based on 356 client reviews
Shahzad S.

Barrie, Canada

$50/hr
4.9
38 jobs

Full Stack AI SaaS Engineer | Building Cloud-Native, AI-Driven SaaS Platforms | Java/Spring Boot, LLMs, AWS & GCP, React, Next.js, Flutter I’m Shahzad, a Certified Java Architect with 10 + years of experience building scalable, high-performance SaaS applications, now focused on integrating AI and automation into modern cloud products. I’ve engineered AI-powered SaaS platforms that combine conversational intelligence, LLM pipelines, and serverless cloud infrastructure. My passion is turning complex workflows into simple, intelligent, user-friendly applications that scale globally. ------------------------------------------------ What I Build: AI-Driven SaaS Products: Multi-tenant cloud apps powered by LLMs (GPT, Claude), RAG, and custom ML APIs Conversational & Voice AI Agents: Twilio + n8n + GPT workflows for 24/7 automation (healthcare, enterprise) Data Intelligence Apps: predictive analytics, anomaly detection, recommendations, and real-time dashboards Cloud-Native Architectures: Java/Spring Boot microservices, REST/GraphQL APIs, and event-driven backends ------------------------------------------------ Core Stack: Backend & Cloud: Java (8 → 25), Spring Boot 3, AWS (Lambda, S3, RDS), GCP (BigQuery, Vertex AI), Docker, Kubernetes AI/ML: Vertex AI, OpenAI API, BigQuery ML, Python (NumPy, Pandas, Scikit-learn), RAG, LLM Integration Frontend: React, Next.js, TypeScript, Tailwind, Flutter (for cross-platform mobile apps) Integrations: Twilio, Stripe, Shopify, BigCommerce, REST/SOAP APIs, Kafka, RabbitMQ ------------------------------------------------ DevOps & Data: CI/CD pipelines with GitHub Actions & Jenkins Cloud monitoring & observability (CloudWatch, GCP Logging) SQL (PostgreSQL, MySQL) & NoSQL (MongoDB, Redis) ---------------------------------------------------- Certifications: Oracle Certified Java Programmer (2022) AWS Certified Developer – Associate (2023) Amazon Machine Learning Specialty (2023) Spring Boot 3 & Spring 6 Architect (2020) SAS Programming Essentials (2023) ------------------------------------------------ Let’s Build Something Smart: Whether you’re launching an AI-powered SaaS platform, a voice or chat agent, or a data-driven product, I can help you design and deliver a system that’s intelligent, scalable, and future-ready.

  • Java
  • Spring Boot
  • Spring Framework
  • Database Architecture
  • React
  • Machine Learning
  • Artificial Intelligence
  • AI Model Training
  • REST API
  • Python
  • Supabase
  • SaaS Development
  • Next.js
  • Full-Stack Development
  • Back-End Development
Adil W.

Mississauga, Canada

$50/hr
5.0
29 jobs

𝗝𝗮𝘃𝗮 𝗕𝗮𝗰𝗸𝗲𝗻𝗱 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 🖥️, 𝗦𝗽𝗿𝗶𝗻𝗴 𝗕𝗼𝗼𝘁 🌱, 𝗠𝗶𝗰𝗿𝗼𝘀𝗲𝗿𝘃𝗶𝗰𝗲𝘀 🛠️, 𝗔𝗪𝗦 ☁️, 𝗥𝗘𝗦𝗧 𝗔𝗣𝗜𝘀 🔗 I help businesses build scalable, secure, and high performance backend systems that handle growth without slowing down. Most applications work well in the beginning. The problems start when traffic increases. APIs become slow, deployments become risky, and maintaining the code becomes expensive. That's where I come in. 𝗔𝘀 𝗮 𝗦𝗲𝗻𝗶𝗼𝗿 𝗝𝗮𝘃𝗮 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 𝘄𝗶𝘁𝗵 𝟭𝟯+ 𝘆𝗲𝗮𝗿𝘀 𝗼𝗳 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲, I've helped startups and enterprise companies design, build, and optimize backend systems that scale reliably in production. I am not just a Java Developer who writes code. I help businesses create backend architectures that support growth, improve performance, and reduce technical debt. 𝗥𝗲𝘀𝘂𝗹𝘁𝘀 𝗜'𝘃𝗲 𝗗𝗲𝗹𝗶𝘃𝗲𝗿𝗲𝗱 • Built scalable Java Developer solutions serving thousands of daily users with high availability. • Designed Microservices architectures that reduced deployment risks and improved system reliability. • Developed Spring Boot applications that improved API response times and backend performance. • Helped businesses migrate legacy systems into modern Java Developer architectures. • Delivered production ready backend platforms for startups and enterprise organizations. Every project starts with a business goal and ends with measurable results. 𝗪𝗵𝗮𝘁 𝗜 𝗗𝗼 𝗝𝗮𝘃𝗮 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 • Custom backend application development • Enterprise Java solutions • Legacy application modernization • Backend performance optimization • Secure and maintainable architecture 𝗦𝗽𝗿𝗶𝗻𝗴 𝗕𝗼𝗼𝘁 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 • REST API development • Spring Security • Spring Data JPA • Authentication and authorization • Scalable backend services 𝗠𝗶𝗰𝗿𝗼𝘀𝗲𝗿𝘃𝗶𝗰𝗲𝘀 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲 • Distributed systems design • Service decomposition • API Gateway implementation • Event driven architecture • System scalability and resilience 𝗔𝗪𝗦 𝗖𝗹𝗼𝘂𝗱 𝗦𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀 • AWS deployment and infrastructure • EC2, ECS, Lambda • Cloud architecture design • Monitoring and optimization • Cost effective cloud operations 𝗥𝗘𝗦𝗧 𝗔𝗣𝗜 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 • API design and implementation • Third party integrations • Payment gateway integration • Documentation and testing • Secure API architecture 𝗪𝗵𝗮𝘁 𝗠𝗮𝗸𝗲𝘀 𝗠𝗲 𝗗𝗶𝗳𝗳𝗲𝗿𝗲𝗻𝘁 Most Java Developers focus only on writing code. I focus on the business impact of the software. 𝗕𝗲𝗳𝗼𝗿𝗲 𝗯𝘂𝗶𝗹𝗱𝗶𝗻𝗴 𝗮𝗻𝘆𝘁𝗵𝗶𝗻𝗴, 𝗜 𝗮𝘀𝗸: • Will this architecture still work when traffic grows? • Can future developers maintain it easily? • Is it secure? • Is it optimized for performance? • Can it scale without major rewrites? This approach helps clients avoid costly problems later. 𝗪𝗵𝗼 𝗜 𝗪𝗼𝗿𝗸 𝗕𝗲𝘀𝘁 𝗪𝗶𝘁𝗵 • Startups building new SaaS products • Businesses scaling existing applications • Companies modernizing legacy Java systems • Teams adopting Microservices architecture • Organizations migrating workloads to AWS • Businesses needing secure and scalable REST APIs 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀 Java, Spring Boot, Spring Security, Hibernate, JPA, Microservices, AWS, Docker, Kubernetes, REST APIs, Kafka, RabbitMQ, PostgreSQL, MySQL, MongoDB, Redis, Maven, Gradle, Git, CI/CD, Jenkins 𝗪𝗵𝘆 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗛𝗶𝗿𝗲 𝗠𝗲 • 13+ years of Java Developer experience • Clean, maintainable code • Scalable backend architecture • Strong communication • Reliable delivery • Long term technical thinking If you're looking for a Java Developer who understands both software engineering and business objectives, let's discuss your project. Send an invitation and I'll respond within a few hours. Keywords: Java Developer, Senior Java Developer, Java Backend Developer, Java Software Engineer, Spring Boot Developer, Spring Boot Expert, Java Application Development, Enterprise Java Developer, Java Web Services, REST API Developer, RESTful API Development, Backend Developer, Backend Engineer, Microservices Developer, Microservices Architecture, Distributed Systems, AWS Developer, AWS Cloud Engineer, Java AWS Developer, Docker, Kubernetes, Kafka, RabbitMQ, Hibernate, JPA, Spring Security, API Integration, Database Design, PostgreSQL, MySQL, MongoDB, Redis, SaaS Backend Development, Scalable Application Development, Cloud Native Applications, Java Consultant, Software Architecture, System Design, Enterprise Application Development, Performance Optimization, CI/CD, Jenkins, Maven, Gradle, Full Stack Java Developer.

  • Java
  • JUnit
  • Spring Boot
  • Core Java
  • Java Servlet API
  • Java Collections Framework
  • API
  • Microservice
  • Java Persistence API
  • Spring MVC
  • Spring Cloud
  • Spring Batch
  • jQuery
  • jMock
  • Git
Pahonsi B.

Brampton, Canada

$30/hr
5.0
5 jobs

Full-Stack Java Developer with 4 years of extensive experience in building, optimizing and maintaining microservices projects. Proven expertise in accelerating application performance, enhancing user experience, and improving system scalability. Exceptional proficiency in Agile methodologies and CI/CD pipelines.

  • Java
  • Spring Boot
  • Python
  • Flask
  • Angular 6
  • CSS
  • HTML KickStart
  • Jakarta Server Pages
  • Node.js
  • JavaScript
  • PyTorch
  • SQLAlchemy
  • Neural Network
  • Convolutional Neural Network
  • LLM Prompt Engineering
Lucy Tran H.

Ottawa, Canada

$39/hr
4.8
11 jobs

🚀 Boost Your Digital Presence with Scalable, High-Performance Full Stack Solutions! I am a seasoned Full Stack Developer with extensive experience in Python/Flask/Django/FastAPI, React/Angular/Next.js, and Java Spring Boot. I design and build robust, scalable web applications using modern frontend frameworks like React, Next.js, and Tailwind CSS, along with backend development in Python (Django, Flask, FastAPI) and Java (Spring Boot, Hibernate, JAX-RS). My solutions leverage secure API integration, efficient database management (PostgreSQL, MySQL, MongoDB), and cloud deployment (AWS, Google Cloud, Docker, CI/CD) to ensure your application performs at its best. 🔥 What I Do: • Frontend Development:  – Build responsive, SEO-optimized user interfaces using React, Next.js, TypeScript, Tailwind CSS, and modern UI component libraries. • Backend & API Development:  – Develop robust RESTful and GraphQL APIs using Python (Django, Flask, FastAPI) and Java (Spring Boot), ensuring scalability and maintainability.  – Set up scalable project foundations with PostgreSQL, Prisma, and GraphQL while following best practices. • Full Stack Integration & Cloud Deployment:  – Seamlessly integrate frontend and backend systems with detailed documentation and code structuring.  – Deploy applications on AWS, Google Cloud, or similar platforms using Docker and CI/CD pipelines for 24/7 high availability. • Additional Capabilities:  – Experience with Node.js, Git, automated testing (JUnit, Selenium, PyTest), and agile methodologies.  – Proven track record in setting up scalable Next.js projects and integrating complex backend systems, including API integrations for services like Twilio, and handling databases like PostgreSQL and MongoDB. 💡 Why Choose Me? • Proven Expertise: I’ve successfully delivered projects—from scalable Next.js foundations with TypeScript, PostgreSQL, Prisma, and GraphQL, to full-stack applications with FastAPI/Django backends integrated with responsive React interfaces. • Customized Solutions: I work closely with you to tailor solutions that reflect your unique business strategies, whether for short-term projects or long-term collaborations. • Transparent Communication: I provide clear, regular updates, thorough documentation, and agile project management to ensure your vision is realized. 📈 Let’s Build Your Next Scalable Web Application! ✉️ 𝗠𝗘𝗦𝗦𝗔𝗚𝗘 𝗠𝗘 now or 𝗜𝗡𝗩𝗜𝗧𝗘 𝗠𝗘 to your job for a 𝗙𝗥𝗘𝗘 𝗖𝗢𝗡𝗦𝗨𝗟𝗧𝗔𝗧𝗜𝗢𝗡—let’s discuss how we can transform your complex requirements into an elegant, high-performance solution that drives your business forward!

  • Java
  • Machine Learning
  • Artificial Intelligence
  • Data Scraping
  • AI Development
  • Software Development
  • Back-End Development
  • Front-End Development
  • Full-Stack Development
  • Python
  • Angular
  • React
  • JavaScript
  • NoSQL Database
  • SQL
Muhammad I.

Mississauga, Canada

$75/hr
5.0
84 jobs

🚀 I help startups, SMBs, and enterprises turn ideas into scalable software products. Whether you're building an MVP, launching a SaaS platform, modernizing an existing application, integrating AI into your business, or scaling an eCommerce platform, I provide end-to-end technical leadership, from architecture and development to deployment and long-term support. Over the past 14+ years, I've delivered high-quality software solutions for startups, growing businesses, and enterprise organizations across healthcare, fintech, eCommerce, logistics, education, and SaaS. I've worked with companies including Google, Cisco Systems, Reddit, Vivint, Upwork, and numerous venture-backed startups to build secure, scalable, and production-ready applications. ━━━━━━━━━━━━━━━━━━━━ WHAT I CAN HELP YOU BUILD ━━━━━━━━━━━━━━━━━━━━ ✅ AI-Powered Applications • Custom AI Agents • OpenAI & Claude Integrations • RAG (Retrieval-Augmented Generation) • AI Workflow Automation • Chatbots & AI Assistants • Document Intelligence • AI Copilots • Recommendation Engines ━━━━━━━━━━━━━━━━━━━━ ✅ SaaS Product Development • MVP Development • Multi-Tenant SaaS Platforms • Subscription Systems • Admin Dashboards • API Development • Authentication Systems • Enterprise Applications ━━━━━━━━━━━━━━━━━━━━ ✅ eCommerce Solutions • Shopify Development • Magento 2 Development • Custom Apps • Marketplace Development • Payment Gateway Integration • Checkout Optimization • Inventory & Order Automation ━━━━━━━━━━━━━━━━━━━━ ✅ Full Stack Development • React • Next.js • Angular • Vue • Node.js • Python • Java • REST APIs • GraphQL ━━━━━━━━━━━━━━━━━━━━ ✅ Mobile Applications • iOS • Android • React Native • Flutter ━━━━━━━━━━━━━━━━━━━━ ✅ Cloud & DevOps • AWS • Azure • Google Cloud • Docker • Kubernetes • Terraform • CI/CD Pipelines • Serverless Architecture ━━━━━━━━━━━━━━━━━━━━ INDUSTRIES ━━━━━━━━━━━━━━━━━━━━ ✔ SaaS ✔ Healthcare ✔ FinTech ✔ Real Estate ✔ eCommerce ✔ Logistics ✔ Education ✔ Enterprise Software ✔ Marketplaces ━━━━━━━━━━━━━━━━━━━━ WHY CLIENTS WORK WITH ME ━━━━━━━━━━━━━━━━━━━━ ✔ Business-first approach, not just coding. ✔ Strong software architecture for long-term scalability. ✔ Clear communication throughout every stage of the project. ✔ Production-ready code with clean documentation. ✔ Focus on maintainability, security, and performance. ✔ Long-term technical partnership beyond the initial launch. ━━━━━━━━━━━━━━━━━━━━ TECHNOLOGIES ━━━━━━━━━━━━━━━━━━━━ Frontend React • Next.js • Angular • Vue • TypeScript Backend Node.js • Java • Python • Spring Boot • Django Databases PostgreSQL • MySQL • MongoDB • DynamoDB Cloud AWS • Azure • Google Cloud AI OpenAI • Claude • LangChain • Hugging Face • Vector Databases • MCP • AI Agents ━━━━━━━━━━━━━━━━━━━━ MY DEVELOPMENT PROCESS ━━━━━━━━━━━━━━━━━━━━ 1. Discovery & Requirements 2. Solution Architecture 3. MVP Planning 4. Agile Development 5. Testing & QA 6. Deployment 7. Ongoing Support & Scaling ━━━━━━━━━━━━━━━━━━━━ Whether you're validating a startup idea, replacing legacy software, adding AI capabilities, or scaling an existing platform, I can help you build software that's secure, scalable, and designed for long-term growth. If you're looking for a senior engineer who understands both technology and business outcomes, let's discuss your project.

  • AI Development
  • OpenAI API
  • Claude
  • AI Agent Development
  • LangChain
  • React
  • Next.js
  • TypeScript
  • Shopify
  • Magento
  • SaaS Development
  • API Integration
  • GraphQL
  • AWS Development
  • Docker
  • PostgreSQL Programming
  • React Native
  • Mobile App
  • Hybrid App Development
  • Shopify Apps
Irshad H.

Oakville, Canada

$25/hr
5.0
22 jobs

THINKING OUTSIDE THE BOX is where I usually start, not where I end Hey there, I’m Irshad Haroon, a WordPress developer, CMS developer, mobile app developer, and app developer who builds WordPress websites and delivers reliable mobile app development for real businesses. I help companies turn ideas into high performance WordPress websites, scalable CMS platforms, and smooth mobile apps through practical mobile app development without the usual stress What I Do ✅ WordPress developer: building fast and scalable WordPress websites for businesses ✅ CMS developer: creating CMS platforms behind modern WordPress websites ✅ Mobile app developer: handling complete mobile app development from idea to launch ✅ App developer: delivering stable apps through structured mobile app development WordPress Website and CMS Work ◉ As a WordPress developer, I create clean and fast WordPress websites that scale with content ◉ Every WordPress website is built by a CMS developer who plans structure and long term growth ◉ WordPress websites developed with performance and usability in mind ◉ CMS development focused on making every WordPress website easy to manage for teams Mobile App Development ◉ As a mobile app developer, I work on full mobile app development for startups and businesses ◉ Every project follows a clear mobile app development process focused on stability ◉ Cross platform apps delivered through efficient mobile app development ◉ Android and iOS apps built by an app developer experienced in long term mobile app development How I Work As a WordPress developer and CMS developer, I start by understanding how your WordPress website will be used day to day, not just how it should look. My CMS development approach focuses on building WordPress websites that are fast, clean, and easy to manage as content grows. As a mobile app developer and app developer, I approach mobile app development with a focus on structure, performance, and reliability so the app keeps working as users grow. Whether it’s a WordPress website or full mobile app development, I keep communication clear and decisions practical Industries I’ve Worked With ✔️ Business and corporate WordPress websites ✔️ CMS platforms powering content-heavy WordPress websites ✔️ Startup and business mobile app development projects ✔️ Custom apps built through focused mobile app development What Makes Me Different ◉ I think beyond visuals and build every WordPress website for real usage ◉ I treat mobile app development as a product not just a task ◉ I build WordPress websites like a CMS developer who expects growth ◉ I deliver mobile app development like an app developer who wants long-term success If your project needs someone who can mix strong engineering with a bit of product insight, I fit that lane perfectly. A spot where I takes your project from “good idea” to “damn, that turned out nice.” Keywords • Mobile app development • CMS developer • WordPress • Shopify • development • performance • speed • websites • app • Flutter • cross-platform • mobile apps developer • webflow • JavaScript • WooCommerce • HTML5 • Web Design • google • Firebase • Firestore • App development • cross platform mobile app • Flutter app • Android App Development • Android • iOS app • iOS developer • android developer • android app

  • Mobile App Development
  • App Development
  • CMS Development
  • WordPress
  • WordPress Website
  • WordPress Development
  • WooCommerce
  • Shopify
  • Shopify Website Design
  • Flutter
  • Ecommerce Website Development
  • Hybrid App Development
  • JavaScript
  • iOS Development
  • Android App Development

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