I have more than 5 years industry + academic experience in Java, spring boot, Rest APIs, microservices, spring JPA, mysql, postgresql.
I have been an ATG developer, software engineer, passionate, hardworking, honest and a quick learner.
I can design, analyse and implement code very effectively and efficiently with accuracy in a professional manner. I can serve in back-end, front-end and on the database side as well.
My technical exposure encircles web programming both front-end and back-end, writing and analysis codes, support and usage of new technologies.
I familiar with the following technologies.
✓ Java, J2EE, Java Server Pages, Jave Servlet Faces, Jasper Report 5.5
✓ IBM MQ, Queue manager, JMS, TCH (The clearing house)
✓ AWS Integration (Elastic Beanstalk, EC2, RDS, Elastic Search etc)
✓ Oracle Repository System, Hibernate, Spring MVC framework, Crystal Report 11.
✓ HTML, XHTML, HTML5 , CSS, CSS3, Prime faces 5, Java script
✓ MySQL, MS SQL server, Oracle SQL Server 11.2, DevOps
✓ ATG 11.2, Oracle SQL developer 12 G, Sumo logic, putty, New Relic Cygwin
✓ RESTful APIs, Web services, Docker.
✓ C, C++, C#, .NET framework, Assembly language
✓ Python, Machine Learning, Artificial Intelligence, Swarm Intelligence, Evolutionary algorithms, Pattern Recognition.
✓ Notebook Jupiter, PyCharm, MOEA, J Metal, platEMO platforms.
Servers and Tools:
✓ Eclipse, NetBeans, JE 8.1, EC2, Matlab, MS Visual Studio, MS Office
✓ J boss 7, Tomcat, Apache
✓ GIT, JIRA, BitBucket
Accomplishments
1. One publication in international journal of pattern recognition and artificial intelligence titled as "Learning regular expressions using XCS based classifier system"
2. 1st position in writing competition in university.
Projects
1. Human activity detection using Kinect sensor in class room.
2. Tic Tac Toe, Library Management System, Connect 4 game
3. Learning regular expressions using XCS based classifier system
Education
1. M Phill Computer Science from National University of Computer and Emerging Sciences NUCES
2. B Sc Computer Engineering from University of Engineering and Technology, Taxila Pakistan.
Abilities
1. Team player
2. Easygoing, communicative
3. Ability to do work in difficult situation.
4. Flexibility, ability to cope with any difficulties during short time-period
MATLAB
C++
Python
Data Science
Machine Learning
SQL
Core Java
Amazon Web Services
Artificial Intelligence
Genetic Algorithm
Spring Boot
Database
Mathematics
Mobile App
.NET Framework
Faisal S.
Lahore, Pakistan
$15/hr
5.0
5 jobs
Java Spring Boot | REST APIs | GRPC | Python | Selenium for Automation | AWS
Are you looking for all-inclusive, reliable micro-services and responsive web app development? Or a full-stack developer who fully understands and fulfils your unique requirements with custom solutions? Do you have time or other constraints that prevent you from hiring full-time, in-house specialists for your project? Don’t worry! You’ve found the right person.
I am Fahad, a Full-Stack Micro-services and Responsive Web developer with over 3+ years of developing, implementing, and maintaining high-quality & customised backend and web-based software solutions across various industry sectors.
I have experience with:
✅ Java, Java Core
✅ Spring Boot, Spring MVC
✅ Spring Boot Data, Spring JPA Data
✅ Spring Security
✅ Microservices
✅ RestAPI / Restful API Development
✅ OpenAPI/Swagger, Postman
✅ API Integration
✅ JPA, Hibernate ORM
✅ Java Concurrency
✅ Relational Database (RDBMS): MySQL, MSSQL Server, PostgreSQL
✅NoSQL Databases: MongoDB, AWS Dynamo DB, Elastic-search
✅ Container Orchestration: Kubernetes, Helm Chart
✅ DevOps Skills: CI/CD, Kubernetes, Docker, Github Actions, GitHub, Ansible
✅Cloud Experience: GCP, AWS, AWS SDK
✅ Automation: Python Selenium
✅ React JS, Bootstrap, Material CSS, HTML, CSS, Javascript, JQuery
🌟 WHY CHOOSE ME OVER OTHER FREELANCERS? 🌟
✅ OWNERSHIP: I take complete ownership on my work and consider doing it as if its my own work, putting up all the efforts to complete the work within the due date and also keeping in mind the quality of the project in my mind.
✅ 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.
Have any questions? Want to discuss your project? Or do you want to get advice?
Drop me a message, and we will have a quick call to understand your requirements so that to help you 100% according to your desires :)
Java
Python
JavaScript
React
Spring Boot
Node.js
Mobile App
React Native
MERN Stack
Selenium
Selenium WebDriver
Automation
Artificial Intelligence
Muhammad M.
Lahore, Pakistan
$20/hr
5.0
6 jobs
I’m a Full Stack Developer with 3+ years of experience, highly skilled in AI workflows, pipeline automation, LLM integration, and building cost-efficient, scalable applications using Java (Spring Boot), Node.js (Express.js), and React.js. I design and develop production-ready systems by combining backend depth with cloud infrastructure, frontend precision, and machine learning integration.
🌟 My Specialization
💻 Backend Development
• ✔️ Java (8, 11, 17): Lambdas, Streams, DateTime API, Functional Interfaces
• ✔️ Java EE Stack: JPA, Hibernate, Servlets, EJB, JAX-RS, JAX-WS, Apache CXF
• ✔️ Spring Frameworks: Spring Boot, Spring Data JPA, Spring Batch, Spring Cloud
• ✔️ Node.js & Express.js: REST APIs, scalable backend services
• ✔️ Messaging Systems: Kafka, Zookeeper, RabbitMQ, ActiveMQ
🤖 AI, LLMs & Data Annotation
• ✔️ Integrated Large Language Models (LLMs) like GPT for automation & decision support
• ✔️ Developed AI-powered SaaS systems with NLP pipelines and feedback collection
• ✔️ Built automated complaint resolution tools with Twilio + Eleven Labs
• ✔️ Designed and deployed data annotation tools for supervised learning workflows
• ✔️ Managed end-to-end AI pipelines from prompt generation to API inference
• ✔️ Created custom workflows for data labeling, cleaning, and augmentation
🛠️ Data Engineering
• ✔️ Designed and implemented ETL pipelines for structured & unstructured data
• ✔️ Experience with data ingestion, transformation, and aggregation in distributed systems
• ✔️ Leveraged Redis, PostgreSQL, and MongoDB for real-time and batch analytics
• ✔️ Integrated structured product and user data into ML pipelines
🌐 Frontend Development
• ✔️ React.js: Component architecture, Hooks, Context API, Zustand/Redux
• ✔️ UI Libraries: Tailwind CSS, PrimeFaces, Bootstrap
• ✔️ Templating Engines: Thymeleaf, JSP, JSF
🗄️ Database Management
• ✔️ SQL: PostgreSQL, MySQL, SQL Server, Oracle
• ✔️ NoSQL: MongoDB, Redis
☁️ Cloud & DevOps
• ✔️ AWS: EC2, S3, RDS, Lambda, IAM, Elastic Beanstalk
• ✔️ DevOps Tools: Docker, Kubernetes, Jenkins
• ✔️ Version Control: Git, GitHub, Bitbucket, VisualSVN
⸻
✅ Testing & Best Practices
• ✔️ JUnit, Mockito, Spring Test, Cypress
• ✔️ Clean Architecture, SOLID principles, modular microservices
• ✔️ Agile workflow, Git branching strategies, CI/CD automation
⸻
🚀 What I Offer
• 🔹 Full-stack app development (React + Java/Node.js)
• 🔹 Custom AI workflows & LLM integration (OpenAI, ElevenLabs, etc.)
• 🔹 Data engineering pipelines & annotation systems
• 🔹 Cloud-native scalable deployment
• 🔹 Enterprise-grade APIs with secure authentication
⸻
💡 Why Work With Me?
I combine full-stack engineering with AI integration and data expertise, delivering intelligent, scalable platforms. Whether you’re building an eCommerce product, AI-driven tool, or a data-labeled training system, I ensure it’s fast, secure, and cost-efficient.
Let’s build something impactful together.
Spring Boot
Spring Data
Spring Cloud
Node.js
ExpressJS
Next.js
JavaScript
React
Core Java
Relational Database
NoSQL Database
Artificial Intelligence
Machine Learning
Data Engineering
DevOps
Syed Najam U.
Lahore, Pakistan
$20/hr
5.0
1 jobs
Hi, I’m Najam. I engineer scalable, enterprise-grade backend systems using Java Spring Boot.
I specialize in building high-performance architectures that handle complex logic and heavy data loads. While many developers focus on the surface, I focus on what powers the business: secure APIs, optimized databases, and resilient microservices.
If you are struggling with slow API responses, messy legacy code, or need a robust backend for a new SaaS platform, I can help you build a foundation that scales.
Why Clients Trust My Backend Solutions:
✅ Performance First: I design systems that handle high traffic without crashing, utilizing efficient algorithms and database indexing.
✅ Enterprise Reliability: I write clean, strictly typed Java code backed by TDD (JUnit/Mockito), ensuring your production environment is stable and bug-free.
✅ Seamless Integration: I have deep experience connecting backends to modern frontends (Vue.js/Nuxt) and third-party services (AWS, Stripe, etc.).
💻 Technical Expertise
Backend & Architecture (Primary Focus)
Core: Java 8+, Spring Boot, Spring Security, Spring MVC
Data & ORM: Hibernate, JPA, Spring Data, complex SQL queries
Architecture: Microservices, RESTful API Design, GraphQL, Event-driven systems
Database & Cloud Infrastructure
SQL: Advanced design in PostgreSQL, MySQL, Oracle SQL, SQL Server
NoSQL: MongoDB schema design and aggregation
DevOps: CI/CD pipelines (Jenkins, GitHub Actions), Docker containerization, AWS/Azure deployment
Frontend & Integration :
I am proficient in Vue.js and Nuxt.js, allowing me to build internal dashboards or collaborate effectively with your frontend teams to ensure smooth API consumption.
Let’s Build Something Solid. I am available for long-term backend architecture roles and complex API development projects. Click "Invite" to discuss your system requirements.
Java
Spring Boot
MongoDB
Web Development
TypeScript
JavaScript
FinTech
Trading Automation
Testing
Generative AI
Vue.js
Vuex
MySQL
Tailwind CSS
REST API
Ahmed A.
Lahore, Pakistan
$30/hr
5.0
13 jobs
🥇 Top Rated AI Backend Engineer | Java | Spring Boot | OpenAI | AWS | 100% Job Success
I help startups and businesses build scalable backend systems and integrate AI capabilities into their existing applications.
With 6+ years of experience building production-grade Java applications, microservices, and cloud solutions, I specialize in creating reliable backend architectures and AI-powered features using Java, Spring Boot, OpenAI, Spring AI, Kafka, and AWS.
I work with companies that need to:
Add AI features to existing software
Build AI assistants and chatbots
Create document intelligence systems
Modernize Java applications
Design scalable backend architectures
🤖 AI & LLM Solutions
OpenAI / ChatGPT API Integration
Spring AI
AI Chatbots & Assistants
AI Agents
RAG (Retrieval-Augmented Generation)
Document Q&A Systems
Embeddings & Vector Search
Semantic Search
AI Workflow Automation
Streaming AI Responses
☕ Backend Engineering
Java & Kotlin
Spring Boot
Spring Security
Spring Cloud
Microservices Architecture
REST APIs
Kafka & RabbitMQ
Database Design & Optimization
☁️ Cloud & DevOps
AWS (EC2, ECS, Lambda, S3)
Docker
Kubernetes
CI/CD Pipelines
Production Deployment
⭐ Why Clients Work With Me
✔ Top Rated Freelancer on Upwork
✔ 100% Job Success Score
✔ 6+ years of backend engineering experience
✔ Fast communication and reliable delivery
✔ Experience working with clients across the USA, Canada, UAE, Romania, and India
✔ Focus on clean, maintainable, production-ready solutions
⭐ Client Feedback
"Fantastic communication. Very fast work. He completed the job on time and addressed every issue along the way. Absolutely a great person to work with." — Josh, USA
"Ahmed is a good professional. We had great conversations and worked together to fix the issue." — Dragos, Romania
🛠 Services I Offer
AI Integration for Existing Applications
OpenAI API Development
AI Chatbot Development
RAG Application Development
Java/Spring Boot Backend Development
Microservices Architecture
REST API Development
Kafka Event-Driven Systems
AWS Cloud Deployment
Legacy Application Modernization
Backend Architecture Consulting
If you need an experienced engineer to build a scalable backend or bring AI capabilities into your product, I’d be happy to discuss your project.
Microservice
Spring Boot
RESTful API
Java
Web Development
Database Architecture
Artificial Intelligence
OpenAI API
Apache Kafka
Amazon ECS
AWS Lambda
Kubernetes
Docker
PostgreSQL
Redis
AI Chatbot
REST API
AI Development
AI Model Integration
AI-Generated Code
Ali N.
Lahore, Pakistan
$40/hr
5.0
3 jobs
Do you have a Data & AI vision that needs to become a real, working product? I don't just build models. I design complete, sustainable solutions, that convert data into practical findings and transformation.
For over 6 years , I've dedicated to strategic alignment, while bridging the gap between groundbreaking Artificial intelligence research and solid software that delivers real-world value. My foundational expertise lies in AI Machine Learning, Data Science and Web Development. This means I can make and scale any product from and field you require me to.
Technologies i work with:
Python
OpenCV
Pandas
Next.js
React
TensorFlow/Keras
TypeScript
Tailwind CSS
SheetJS
PowerBI
LookerStudio
Framer Motion
Zod
shadcn/ui components
Recharts (charts)
BeautifulSoup4
pdfminer.six
Backend / server-side (depending on project)
Next.js API Routes / Route Handlers
Next.js Server Actions
Data cleaning / files / validation
My portfolio and projects speak for themself.
Have any doubts? Reach me out and we can sort it out.
Lets collaborate and bring your ideas and projects to life :)
Data Science
Data Scraping
Data Visualization
Web Development
Front-End Development
CSS Framework
React
SQL Programming
Microsoft Excel
Computer Vision
Python
Data Analysis
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