You need a team that can build the whole product - not just one piece of it. We’re SparkTech, a full-service software engineering team with expertise across web, mobile, AI, and cloud infrastructure. Whether you’re launching an MVP, scaling a platform, or integrating cutting-edge AI into your product, we’ve done it, and we can do it for you. Web Development Full-stack web applications built to scale. We work across the entire stack: • Backend: Java (Spring Boot), C# (.NET), Python, Node.js, Go • Frontend: React, Next.js, Angular, JavaScript • Databases: PostgreSQL, MySQL, Redis Mobile Development Native-quality apps for iOS and Android, built with modern cross-platform tools: • Flutter - single codebase, native performance • React Native - JavaScript-powered, fast to market AI & Machine Learning From intelligent agents to production ML pipelines: • AI Agents and autonomous workflows • LangChain & LangGraph for LLM orchestration • OpenAI, Gemini, and custom model integrations • Python-based ML pipelines and data processing DevOps & Cloud Infrastructure We don’t just build, we deploy, scale, and maintain: • AWS, Azure, and Google Cloud • Docker & Kubernetes for containerised deployments • CI/CD pipelines, monitoring, and infrastructure as code Why Clients Choose SparkTech: • 100% Job Success Score on Upwork • 5.0 ★ client review: “SparkTech delivered excellent technical results with great attention to detail” • End-to-end delivery - from architecture to production • Clear communication, no surprises, on-time delivery • Flexible on fixed-price or hourly contracts Ready to build? Send us a message - we typically respond within a few hours.

I am a Software Developer based on Java and Kotlin, with a comprehensive skill set that extends to a variety of technologies. Java and Kotlin Expertise: Proficient in Java SDK design functionality, including the full activity lifecycle, and adept at developing robust back-end solutions in Kotlin. REST API Design: Experienced in designing and implementing RESTful APIs, ensuring seamless communication between different components of software systems. Elasticsearch: Skilled in utilizing Elasticsearch for efficient full-text search functionality, contributing to the creation of applications with advanced search capabilities. Redis: Well-versed in leveraging Redis for caching, session storage, and real-time analytics, enhancing application speed and responsiveness. RabbitMQ: Proficient in RabbitMQ, employing it to design reliable and scalable messaging solutions for seamless communication and coordination in distributed systems. Docker: Familiar with Docker, utilizing containerization for efficient deployment and management of applications, ensuring consistency across different environments. MySQL: Knowledgeable in MySQL, contributing to expertise in database management and ensuring data integrity in applications. Linux: Proficient in Linux environments, facilitating efficient development, deployment, and maintenance of software systems. As a consummate collaborator, I bring these skills together to create high-quality software solutions. My experience extends from back-end development to the integration of cutting-edge technologies, ensuring the delivery of robust and scalable applications.

Java Development 🖥️, Spring Boot 🌱, Microservices 📦, Database Design 📊, API Development 🔗, Security Enhancement 🔒, JavaScript & React.js ⚛️, Data Management 🗄️ Highly skilled and experienced developer, Saad Alamgir, with over 4 years of expertise in cutting-edge technologies and 50+ completed projects. Proven track record in designing scalable web applications and APIs. Crafting efficient and elegant code is my passion, with a focus on execution speed optimization and robust databases. Committed to database security and application stability, I ensure exceptional performance through comprehensive validation strategies. My skills include a strong command of Java and the Spring framework, proficiency in developing microservices, database management, and developing user interfaces with React.js. ☕️ Java Development Expert in using advanced Java, including Generics, Lambda, and Concurrency for robust applications. ⏻ Spring Boot Skilled in configuring Spring Boot for secure, efficient web application development with features like Atomicity and Security. Microservices Develop microservices architecture with Docker for scalable and maintainable services. Database Design Design, implement, and optimize databases in MySQL, PostgreSQL, MongoDB, and more for robust data management. API Development Develop and integrate APIs using Spring Cloud and other technologies to enable seamless communication between services. 🔒Security Enhancement Prioritize implementing security measures against cyber threats to protect data integrity and privacy. ⚛️ JavaScript & React.js Develop dynamic user interfaces using React.js, with proficiency in Axios for handling requests. 🗄️Data Management Handle complex data loads in databases like Cassandra and Elasticsearch for optimal performance. Ready to take your web projects to the next level? Let’s connect and make your vision a reality!

I am mainly a Java Developer with about 4 years of experience in IT. My skills & abilities allow me to cover all aspects of Back-End development: design and develop a robust Back-End part, and then cover the product with Unit Tests. Due to my profound background in app development. I am always looking for new challenges allowing me to develop myself on a personal and professional level before finishing my studies. I can easily learn whatever technologies are required in just a few days. Invite me for an interview if you feel like I’m the right person to turn your ideas into reality. TECHNOLOGIES I USE ✅ PROGRAMMING LANGUAGES: Java, Golang, C/C++, Javascript, Typescript, NodeJS ✅ FRAMEWORKS: Spring (Spring Boot, Spring Security), Hibernate, Angular, ReactJs, Express ✅ DATABASES: MySQL, PostgreSQL, H2, mongoDB ✅ WEB: HTML5/CSS3, Bootstrap ✅ TESTING: JUnit, Mockito, Selenium, Postman ✅ Operating systems: Windows, Linux ✅ OTHER: Docker, Maven, Camunda BPMN In addition to the above, I possess a solid grasp of Algorithms. Also API Integration is also among my strongest sides. LANGUAGES I SPEAK I feel confident when communicating with customers and teammates in English (both written and spoken). Apart from that, Arabic is my native languages. INVITE ME FOR AN INTERVIEW If you feel like I’m a perfect match for your project, invite me and we’ll implement your ideas in the best way.

I am a Senior Java and Backend Developer with more than 12 years of experience building scalable enterprise applications and SaaS platforms. My core expertise is in Java, Spring Boot, Node.js, and TypeScript, where I design and deliver robust backend systems, microservices, and integrations for startups and Fortune 500 companies. I specialize in backend development, API design, database optimization, and cloud-native architectures, with a proven track record of delivering production-ready solutions. Available 40 hours per week across EST, PST, BST, and CET. 🔹 Core Backend Expertise Java (8, 11, 17): Streams, Lambdas, Concurrency, Functional APIs Python: Django, Flask, FastAPI Node.js, Express.js, TypeScript (clean, strongly-typed code) Frameworks: Spring Boot, Spring Cloud, Spring Security, Hibernate, JPA, Java EE (EJB, Servlets, REST, SOAP) Microservices: REST APIs, distributed systems, event-driven architectures Databases: PostgreSQL, MySQL, Oracle, MongoDB, Redis, Prisma ORM Messaging & Integrations: Kafka, RabbitMQ, ActiveMQ Security: OAuth2, JWT, encryption, secure data flow 🔹 Full Stack Development (Supporting Experience) MERN (MongoDB, Express, React, Node.js) MEAN (MongoDB, Express, Angular, Node.js) React.js, Angular, Vue.js for modern frontends Next.js and Node.js for full stack applications HTML5, CSS3, Bootstrap, Tailwind CSS, jQuery for responsive interfaces TypeScript & JavaScript (ES6+) with Redux, Context API 🔹 Cloud & DevOps AWS: EC2, S3, RDS, Lambda, IAM, Elastic Beanstalk, CloudFormation CI/CD & Containers: Docker, Kubernetes, Jenkins, GitHub Actions, GitLab CI Cloud-native systems with high availability, scalability, and performance optimization ✅ Why Clients Choose Me 12+ years backend-first expertise in Java, Spring Boot, Node.js, and Express Strong TypeScript coding practices with focus on scalability Full stack capabilities with MERN and MEAN stacks Skilled in enterprise-grade solutions, SaaS platforms, and microservices Experienced in distributed teams across multiple time zones If you need a backend-focused developer who also brings Java expertise and full stack knowledge, I can help you build reliable, secure, and scalable solutions. Keywords: Senior Java Developer, Backend Developer, Node.js, Express.js, TypeScript, MERN, MEAN, React.js, Angular, Vue.js, Next.js, Spring Boot, Spring Cloud, Spring Security, Hibernate, JPA, Java EE, Microservices, REST API, SOAP API, API Development, PostgreSQL, MySQL, Oracle, MongoDB, Redis, Prisma, Secure APIs, OAuth, JWT, AWS, Cloud, Docker, Kubernetes, CI/CD, GitHub Actions, Jenkins, GitLab CI, Kafka, RabbitMQ, ActiveMQ, Event-Driven Architecture, SaaS, Enterprise Applications, Scalable Systems, High Availability, Performance Optimization.

-------------------------------------------🟢𝐀𝐯𝐚𝐢𝐥𝐚𝐛𝐥𝐞 𝐍𝐨𝐰🟢------------------------------------------- Greetings, I am a Certified Backend Developer with over 8 years of experience, in enterprise-level application development, often under tight deadlines. My journey is anchored in developing robust backend systems using the Spring Framework, PHP Core or Python. 🌟 My Specialization 🌟 ✅ Python Spark, Flask, Django & FastAPI Frameworks ✅ DBT core & Databricks Workflows ✅ Java EE Family: EJB, JPA, Hibernate,Servlets, RESTful Services (JAX-RS), SOAP Services (JAX- WS), Apache CXF & Bean Validation. ✅ JAVA Spring Frameworks: SpringBoot, Spring Core, Spring Batch, Spring Data, Spring Cloud ✅ SQL Databases: SQL Server, MySQL, PostgreSQL, MariaDB & Oracle ✅ NoSQL Databases: Dynamo & MongoDB ✅Hands-on design, development, implementation, and optimization of the application. ✅Use Object-oriented techniques and Software engineering best practices including Design review, Code review, and Code re-factoring. ✅Experienced with the full Software development life cycle (SDLC) including - Requirement gathering - Prototyping (Design, Development & Debugging) - Testing and - Deployment 🌟 WHY CHOOSE ME OVER OTHER FREELANCERS? 🌟 ✅ Quality-Oriented: I focus on providing VALUE to all of my Clients and Earning their TRUST. Delivering with quality is the key to gaining trust, and that's where I put my core focus. ✅ Over-Delivering: This is core to my work as a Freelancer. My focus is on GIVING more than what I expect to RECEIVE. I take pride in leaving all of my Clients saying "WOW." ✅ Adaptive to changes: During Software Development Lifecycle, it is highly likely some changes might be needed. I understand this and open to any changes. The end goal is to make my client achieve his target, and the objective is to make his/her business more profitable. ✅ Responsiveness: Being extremely responsive and keeping all lines of communication readily open with my Clients. ✅ Respect: Self-respect is everyone's right. I belong and thrive in a work culture where everyone's self-respect is of utmost importance. Maintaining relations with my clients to boost their self-respect is one of the core offerings that I can offer here. If you seek an unwavering professional with a penchant for perfection and a relentless commitment to innovation, let's join forces to breathe life into your vision. Together, we can catalyze the true potential of the digital landscape.

Java · React · AWS · AI — Full stack engineer who ships end-to-end. 7+ years building fintech, risk/compliance, and SaaS platforms that handle real users at scale. Most projects fail because you need one person for the backend, another for the frontend, another for cloud, and nobody talks to each other. I replace that with one senior engineer who owns the full delivery — architecture to deployment. What clients hire me for: → Backend systems — Java/Spring Boot microservices, REST & GraphQL APIs, Kafka event pipelines, secure authentication. I've built enterprise compliance platforms serving 50+ organizational workflows. → Frontend & mobile — React, Next.js, React Native/Expo apps. I built a cross-platform fintech product (desktop + mobile + web) from a single TypeScript monorepo. → Cloud & DevOps — AWS and GCP architecture, Docker, Kubernetes, CI/CD pipelines. I've set up infrastructure with CDK/Lambda/Cognito that auto-scales and costs pennies at low traffic. → AI integration — LLM-powered features, AI agents, RAG pipelines, and automation workflows plugged into real production systems. Not chatbot demos — working AI inside shipping products. I also work with: Kotlin, Node.js, Angular, Astro, Tailwind, ShadCN, PostgreSQL, MySQL, MongoDB, DynamoDB, gRPC, WebSockets. Oracle Certified. Clean code. Fast replies. I deliver on time and explain things clearly — whether you're a CTO or a non-technical founder. What are you building? Let's talk.

I help teams design and ship mobile applications for Android and iOS. My core background is native Android (Kotlin, Java), and cross-platform (Flutter & React Native). I've delivered 20+ commercial apps across fintech, social, maps, logistics, and entertainment. I cover the full cycle: architecture, feature development, testing, performance optimization, and post-release support. 🎯 What I work on: - New apps from scratch - UI/UX implementation - Architecture improvements - Crash fixes & stability - Release automation - Firebase/Analytics integration - API/backend integration - AI integration 🛠 Architecture: MVVM, MVP, Clean Architecture 🧩 Technologies and Libraries: - Android: Kotlin, Java, Jetpack Compose, Android SDK, Dagger/Hilt, Room, Retrofit, OkHttp, Coroutines, Flow - Flutter: Dart, BLoC, Provider, Riverpod, GetX - React Native: JavaScript, TypeScript, Redux, Expo - Firebase: Crashlytics, Analytics, AdMob, A/B testing, Cloud Messaging - Testing: JUnit, Mockito, Espresso, Robolectric - Git: GitHub/GitLab, Bitbucket, Mercurial 🤖 How I use AI I use AI as a productivity tool to speed up repetitive engineering work, but I never deliver raw AI-generated output. I focus on scalable, maintainable, and high-performance applications, delivering projects that meet both user expectations and business goals. If you are looking for someone who can build Android features or improve app quality - contact me.

Over 14 years of solid and hands-on experience with Java, Java Enterprise Edition, and related APIs, technologies, and frameworks., Expert in conceptualizing, designing, and coding technical solutions using Java/J2EE technology stacks. • Professional Java development using Spring boot, Spring, Vert.x, Hibernate, Kafka, • Professional using JavaScript, Angular, ReactJS, HTML5, XML, CSS. • Good experience working with Perl, C++, .NET, and Python. • Professional SQL, MySQL, Oracle, DB2, and PostgreSQL, MSSQL. • Professional software development methodologies using Agile/Scrum, CI/CD pipeline • Extensive Object-Oriented Development OOP/OOD experience, Design pattern, Microservices patterns, Containers, Docker. • Extensive web services experience, Reactive, Message driven.

I'm a Full-Stack Java Developer with over 8+ years of industry experience. I excel in all aspects of Java application development, from design and development to deployment. I have a proven track record of building robust and Scalable applications across diverse domains. My Expertise Full-Stack Development: Java: Core Java, multithreading, OOP, Spring, Hibernate, Struts, J2EE. Frameworks & Libraries: Spring, Hibernate, JavaFX, Apache Struts. Microservices Architecture: Spring Cloud, Netflix OSS, service discovery, load balancing, tolerance mechanisms. Web Development: JSP, Servlets, RESTful APIs, Angular, React, HTML, CSS, JavaScript. Databases: MySQL, PostgreSQL, MongoDB, Redis. Testing & Debugging: JUnit, Mockito. I also use GitHub Copilot and Claude Code to deliver the best solutions. ✔ LLM integrations (OpenAI, Claude, etc.) ✔ AI-assisted workflow automation ✔ Prompt engineering & optimization ✔ RAG based enterprise search solutions ✔ AI code acceleration using tools like Cursor ✔ Designing AI-ready Microservices architecture Java Solution Architect: Designing scalable solutions with Java, Spring, Hibernate, and microservices. DevOps: Cloud setup, infrastructure management, CI/CD. Proficient in AWS (Lambda, EC2, S3, Redshift, SageMaker, Cognito) and GCP (VMs, Google cloud storage). Domain Experience: Insurance, finance, healthcare, e-learning, e-commerce, travel, real estate, logistics, supply chain, social networking, and education. CRM and ERP systems.