Proven expertise in managing the entire software development lifecycle—from gathering customer requirements, analysis, and design to development, automated testing, and deployment—utilizing a diverse technology stack including Java/J2EE, Python, C#, VueJS, AngularJS, JSF/PrimeFaces, Laravel, PHP, AWS, and WordPress. Extensive experience in the design and development of mission-critical applications, with a strong focus on: Requirement Analysis: Collaborating with stakeholders to understand and document project requirements, ensuring alignment with business objectives. Technical Design: Crafting robust architectural solutions, creating proof of concepts (POC), and providing detailed estimations to guide project execution. Development & Automation: Leading development teams to implement scalable, high-performance applications, and utilizing automation tools for testing and deployment. Code Review & DevOps: Conducting thorough code reviews to maintain quality standards and driving continuous integration and deployment processes using DevOps best practices. Skilled in providing comprehensive support for critical applications, offering clients in-depth technical knowledge, customized solutions, and feature-specific enhancements. A quick learner with a demonstrated ability to adapt to rapidly changing technical environments and resolve complex issues effectively. Known for delivering high-quality results under tight deadlines. Technical Skills/Tools: Programming Languages & Frameworks: Java, J2EE, Python, C#, PHP, Laravel JSF, PrimeFaces, Spring, Spring Boot VueJS, AngularJS, JavaScript, NodeJS Web Development: WordPress, HTML/JS/JSON Version Control & CI/CD: Git, SVN, Maven, Jenkins, Docker, Ansible Other Tools: Eclipse IDE, Trello Specializations: Machine Learning, AI, Selenium (Java), Data Scraping Tools (Java) Unity

I am a Java Developer specializing in Spring Boot, Microservices, and RESTful APIs with hands-on experience in Docker, Kubernetes, Apache Kafka, and Hibernate. With a strong background in designing scalable and secure backend systems, I help businesses build efficient, high-performance applications that meet modern software demands. 𝐖𝐡𝐚𝐭 𝐈 𝐎𝐟𝐟𝐞𝐫: ✔ Backend Development with Java, Spring Boot, and Spring Framework ✔ Building Microservices using Spring Cloud, Kafka, and Docker ✔ Designing RESTful APIs and integrating with databases like MySQL, PostgreSQL, and Oracle DB ✔ Deploying applications in Kubernetes, Docker, and cloud environments ✔ Writing efficient SQL queries and working with MongoDB and Apache Solr ✔ Ensuring high-quality code with JUnit testing 𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤: ✔ Java, Java EE, Spring Boot, Spring Security, Hibernate ✔ REST API Development, Microservices, Spring Cloud ✔ Docker, Kubernetes, Apache Kafka, Apache Solr ✔ MySQL, PostgreSQL, Oracle DB, MongoDB ✔ CI/CD Pipelines, Jenkins, Git, BitBucket ✔ Ubuntu, Azure Cloud, IBM DB2 𝐏𝐫𝐞𝐯𝐢𝐨𝐮𝐬 𝐖𝐨𝐫𝐤: ✔ Bank Reconciliation System (ReconStream) – Automated banking reconciliation software ✔ EOBI Backend System – Backend services for Employees' Old-Age Benefits Institution ✔ Motor Vehicle Registration System – Government of Sindh’s vehicle registration portal ✔ Pakistan Reinsurance (PAKRE) System – Public sector insurance solution If you're looking for a Java Backend Developer who can build scalable microservices, secure APIs, and efficient database solutions, let’s connect! Let's discuss your project today!

🌟 Top Rated Plus & Expert-Vetted Freelancer on Upwork 🌟 I’m a seasoned Software Engineer with 12+ years of experience in building high-performance, enterprise-grade applications and cloud-native platforms. I specialize in developing scalable multi-tenant SaaS products, AI-powered automation tools, and secure, cloud-based backend systems. I have led the end-to-end development of enterprise SaaS platforms used globally, with a focus on microservices architecture, event-driven design, and robust multi-region tenant isolation. My experience also extends to integrating advanced AI workflows into production systems using cutting-edge tools like OpenAI and Google Vertex AI. I bring a results-driven mindset, strong problem-solving ability, and the ability to align technology with business goals. Whether you need to build from scratch, modernize an existing system, or integrate AI, I can help deliver value quickly and reliably. 💼 Core Expertise • SaaS Architecture: Multi-tenant design, tenant-aware microservices, RBAC, region-based deployments • AI Integrations: OpenAI (GPT), Google Vertex AI, LangChain, Pinecone, embeddings, vector search, LLM agents • Cloud & DevOps: AWS (Lambda, ECS, RDS, Cognito), GCP (Cloud Functions, Cloud Run, BigQuery), Docker, Kubernetes, Terraform • Backend Development: Java (Spring Boot), Python (FastAPI, Django), Node.js (Express, NestJS), PHP (Laravel) • Frontend Development: React, Angular, Vue.js, Tailwind CSS • CI/CD & Monitoring: GitHub Actions, Jenkins, AWS CodePipeline, Prometheus, Grafana, ELK, CloudWatch • Databases & Caching: PostgreSQL, MySQL, MongoDB, DynamoDB, Redis If you’re looking for a developer who can take ownership, move fast, and deliver production-ready results, let’s connect. I’m confident I can help you build reliable software that scales with your business.

Software Engineer with 4 years of experience specializing in backend development, customer engagement, and cross-team collaboration. Proven ability to bridge technical teams and clients, ensuring seamless project execution. Adept in Java, JavaFX, Rust, PostgreSQL, SQLite, SpringBoot, Google Cloud, and K8s with a strong focus on optimizing performance and delivering high-quality software solutions. Fluent in English, with experience working with offshore teams, delivering clear and effective communication across cultural boundaries.

Hi there! My name is Sally Peck. Tech Stack: - Delphi | VCL | FMX | FastReports | DevExpress (Reference: CodePartners Pty Ltd). - C# | WPF | WinForms - Java Spring - Add-in-Express Team member (Outlook, Word, and Excel Add-in development) - CI/Build environment - Coding support | InstallShield | WIX Please see my happy customers and high ratings below.

Hi...!, I’m Hady. Thanks for stopping by. Nice to meet you! I help you to build scalable software products that deliver real business value. With 10+ years of professional experience, I've worked in fintech, banking, e-commerce, and enterprise environments, designing and developing systems that serve thousands of users while maintaining performance, reliability, and security. My expertise includes: ✅ Backend Development • Java • Spring Boot • REST APIs • Microservices • PostgreSQL • MySQL • Redis • RabbitMQ • Authentication & Authorization • API Integrations ✅ Frontend Development • React • Next.js • JavaScript • TypeScript • Tailwind CSS • Responsive UI Development ✅ Mobile Development • React Native ✅ Cloud & DevOps • AWS • Google Cloud Platform • Docker • CI/CD Pipelines • Linux Servers Recent achievements: • Built banking and fintech features adopted by 30,000+ users • Improved production API performance by 30% • Reduced onboarding time by 60% through technical documentation and developer enablement • Delivered multiple production systems across web, mobile, and backend platforms What clients appreciate most about working with me: ✔ Clear communication ✔ Fast delivery ✔ High-quality, maintainable code ✔ Proactive problem solving ✔ Long-term thinking If you're looking for an engineer who can own features end-to-end and deliver production-ready solutions, let's discuss your project. Best, Hady

I am a Java Backend Engineer specializing in designing and delivering scalable, secure, and high-performance enterprise applications. My core expertise includes Spring Boot, microservices, REST API design, multi-tenant architectures, and containerized deployments using Docker. I focus on building backend systems that are robust, maintainable, and optimized for long-term growth. 𝗜𝗻𝗱𝘂𝘀𝘁𝗿𝘆 & 𝗗𝗼𝗺𝗮𝗶𝗻 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 I work across full-stack environments where backend performance and architectural integrity are critical. My experience spans SaaS platforms, enterprise systems, and healthcare software particularly LIMS/LIS solutions and interoperability standards such as FHIR and HL7. This domain expertise enables me to build reliable, compliant, and integration-ready systems used in diagnostics and clinical workflows. 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴 𝗔𝗽𝗽𝗿𝗼𝗮𝗰𝗵 My professional approach emphasizes clean architecture, automation, database optimization, distributed system design, and cloud-ready development practices. I translate complex business requirements into technical solutions that are production-ready, well-structured, and aligned with strategic product goals. 𝗖𝗼𝗿𝗲 𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗦𝗸𝗶𝗹𝗹𝘀 Java, Spring Boot, Microservices, REST APIs Angular, React.js PostgreSQL, MySQL Docker, Nginx, Traefik, AWS, DigitalOcean Healthcare IT: FHIR, HL7, LIMS/LIS architectures System design, integration patterns, multi-tenant systems 𝗖𝗼𝗹𝗹𝗮𝗯𝗼𝗿𝗮𝘁𝗶𝗼𝗻 & 𝗗𝗲𝗹𝗶𝘃𝗲𝗿𝘆 I collaborate effectively with product managers, QA teams, and engineering stakeholders to deliver solutions that scale with organizational needs. If you are building healthcare platforms, enterprise software, or cloud-native applications, I bring the technical depth and execution discipline to deliver meaningful impact.

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

Hello! I’m Sardar Umair Tariq, a passionate and results-driven Software Engineer with 5+ years of professional experience in building scalable web applications, backend systems, and AI-powered solutions. I specialize in Java Spring Boot, Microservices Architecture, RESTful APIs, and Full Stack Development, with additional expertise in Python, Machine Learning, and Data Science. I have worked on enterprise-level applications, healthcare systems, data-driven platforms, and automation tools, helping businesses build reliable, secure, and high-performance software solutions. 💡 What I Can Help You With: ✔ Java Spring Boot Backend Development ✔ REST API & Microservices Development ✔ Full Stack Web Development (Angular, JavaScript, TypeScript) ✔ Database Design & Optimization (MySQL, PostgreSQL, MongoDB) ✔ Python Development & Automation ✔ Web Scraping (Scrapy, Selenium, BeautifulSoup) ✔ Machine Learning & AI Solutions ✔ Docker & Cloud Deployment ✔ Bug Fixing, Performance Optimization & Maintenance ✔ API Integration & System Design 🔧 Tech Stack: Java • Spring Boot • Spring Security • Hibernate • JPA • Microservices • Python • Django • Flask • Angular • TypeScript • MySQL • PostgreSQL • MongoDB • Docker • Git • AWS • Kafka • REST APIs • TensorFlow • Scikit-learn 🏆 Highlights: • Associate Software Engineer at Techno-Soft Solutions • Worked on enterprise healthcare platform OpenClinica • Microsoft Imagine Cup Pakistan Regional Winner 2023 • Research publication in AI & NLP • Strong experience with scalable backend systems and production support I focus on writing clean, maintainable, and scalable code while ensuring clear communication and timely delivery. Whether you need a backend developer, full-stack engineer, API specialist, or AI-powered solution, I’m here to help turn your ideas into reality. Let’s collaborate and build something impactful together!

𝗘𝘅-𝗝𝘂𝘀𝘁𝗘𝗮𝘁 | 𝗘𝘅-𝗦𝘁𝗮𝗽𝗹𝗲𝘀 | 𝗘𝘅-𝗙𝗶𝗻𝘇𝗹𝘆 | 𝗧𝗼𝗽 𝟭% 𝗨𝗽𝘄𝗼𝗿𝗸 𝗧𝗮𝗹𝗲𝗻𝘁 | 𝗕𝘂𝗶𝗹𝘁 𝗣𝗹𝗮𝘁𝗳𝗼𝗿𝗺𝘀 𝗳𝗼𝗿 $𝟮𝗕+ 𝗕𝗿𝗮𝗻𝗱𝘀 I optimize backend architecture, infrastructure cost, database performance, and cloud security for high-growth SaaS platforms. Previously Senior Engineer at JustEat, Staples, and Finzly. 9+ years building production systems at scale, supporting 100k+ active users. I design systems that directly improve business margins through performance, reliability, and cost efficiency. Impact: -42% Cloud Spend | 94% Faster Data Pipelines | $2B+ processed on systems I helped design and operate. 𝐈𝐍-𝐇𝐎𝐔𝐒𝐄 𝐒𝐀𝐀𝐒 𝐌𝐈𝐍𝐃𝐒𝐄𝐓 & 𝐓𝐎𝐓𝐀𝐋 𝐎𝐖𝐍𝐄𝐑𝐒𝐇𝐈𝐏 I operate like a technical co-founder, not a ticket-based freelancer. I take end-to-end ownership of architecture, scalability, and delivery. You define the business goal, and I design and implement the backend system to achieve it with minimal operational overhead and long-term scalability. From MVP to millions of users, I make architecture decisions based on performance, cost efficiency, and maintainability. 𝐏𝐄𝐑𝐅𝐎𝐑𝐌𝐀𝐍𝐂𝐄 & 𝐃𝐀𝐓𝐀 𝐄𝐍𝐆𝐈𝐍𝐄𝐄𝐑𝐈𝐍𝐆 If your system is slow or your cloud bill is increasing, I refactor architecture for both performance and cost efficiency. ◆ At Staples, reduced a core data pipeline from 90 minutes to 5 minutes (94% improvement) ◆ Optimized backend systems using caching, indexing, Kafka, and Redis to achieve millisecond-level latency ◆ Refactored legacy systems into scalable event-driven architectures where needed 𝐑𝐀𝐏𝐈𝐃 𝐌𝐕𝐏 𝐃𝐄𝐕𝐄𝐋𝐎𝐏𝐌𝐄𝐍𝐓 (𝐀𝐈 𝐀𝐂𝐂𝐄𝐋𝐄𝐑𝐀𝐓𝐄𝐃) Need to launch fast? I combine AI-assisted frontend generation with production-grade backend architecture. Using tools like Lovable, Bolt.new, v0, Supabase, and Cursor to accelerate UI development, while I design and implement secure, scalable AWS backends underneath. 𝐈𝐍𝐕𝐄𝐒𝐓𝐎𝐑-𝐑𝐄𝐀𝐃𝐘 𝐀𝐑𝐂𝐇𝐈𝐓𝐄𝐂𝐓𝐔𝐑𝐄 & 𝐂𝐎𝐌𝐏𝐋𝐈𝐀𝐍𝐂𝐄 Preparing for funding rounds or enterprise clients: ◆ Architecture audits to identify risks, bottlenecks, and cost inefficiencies ◆ Compliance-ready systems aligned with HIPAA, GDPR, SOC2, and PCI-DSS ◆ Clear technical documentation for investor and enterprise due diligence 𝐖𝐇𝐀𝐓 𝐈 𝐃𝐄𝐋𝐈𝐕𝐄𝐑 ◆ Cost-efficient backend systems optimized for real production workloads ◆ Scalable architectures designed for long-term product growth ◆ High-availability systems built for peak load reliability ◆ AI-integrated backend systems using OpenAI and AWS Bedrock 𝐑𝐄𝐂𝐄𝐍𝐓 𝐂𝐀𝐒𝐄 𝐒𝐓𝐔𝐃𝐘 A fintech platform was failing during traffic spikes, causing failed transactions and rising infrastructure costs. I re-architected their backend into a scalable event-driven system, optimized APIs, and removed database bottlenecks. Result: handled a 300% traffic surge with zero downtime and reduced AWS costs by 42% within one month. 𝐓𝐄𝐂𝐇 𝐒𝐓𝐀𝐂𝐊 𝐀𝐓 𝐀 𝐆𝐋𝐀𝐍𝐂𝐄 Languages: Java (Spring Boot), Node.js (NestJS), Python Cloud/Infra: AWS (Lambda, ECS/Fargate, DynamoDB, RDS, EventBridge, S3), Terraform, CDK etc... AI: OpenAI, AWS Bedrock, LangChain etc... Data: Redis, Kafka, Supabase etc... Tools: Lovable, Bolt.new, v0, Cursor base44, claude etc.. 𝐂𝐋𝐎𝐔𝐃𝐅𝐋𝐀𝐑𝐄 𝐄𝐃𝐆𝐄 & 𝐒𝐄𝐑𝐕𝐄𝐑𝐋𝐄𝐒𝐒 Cloudflare Workers (APIs), R2 (storage), D1/KV (data), Queues/Durable Objects (async), CDN/WAF etc... 𝐈𝐍𝐃𝐔𝐒𝐓𝐑𝐈𝐄𝐒 Fintech (PCI/GDPR), Healthcare (HIPAA), E-commerce, Logistics, Marketplaces 𝐑𝐄𝐀𝐃𝐘 𝐓𝐎 𝐓𝐀𝐊𝐄 𝐘𝐎𝐔𝐑 𝐀𝐑𝐂𝐇𝐈𝐓𝐄𝐂𝐓𝐔𝐑𝐄 𝐒𝐄𝐑𝐈𝐎𝐔𝐒𝐋𝐘? If you're building a serious SaaS product, you don’t just need code, You need architecture that scales, performs, and stays cost-efficient under real production load. Send 2–3 time slots, and I’ll review your system and suggest an architecture approach.