Full-Stack Engineer | Java Spring Boot | Angular | Python | Node.js | MEAN / MERN | Cloud, AI & DevOps (AWS) Hi, I’m Muhammad Talha, a results-driven Full-Stack Developer with over 8 years of hands-on experience building secure, scalable, and high-performance applications. I have successfully delivered end-to-end solutions for industries including Banking, IoT, and Healthcare, transforming complex business requirements into production-ready software. I specialize in working across the full software development lifecycle. From understanding business needs and designing robust system architectures to developing clean, maintainable code and deploying applications to cloud environments, I take full ownership of the development process to ensure reliable and efficient outcomes. **Backend Development** I have strong expertise in Java and Spring Boot, with extensive experience building RESTful APIs, microservices-based architectures, and secure backend systems. I focus on performance, scalability, and clean code practices using Hibernate and industry-standard design patterns. **Frontend Development** On the frontend, I develop modern, responsive, and user-friendly interfaces using Angular, React, TypeScript, and Material UI. I ensure seamless integration between frontend and backend systems, delivering smooth user experiences across devices. **Cloud & DevOps** I work with AWS to deploy and manage scalable cloud-based applications. My DevOps experience includes Docker, Kubernetes, and CI/CD pipelines, enabling automated, reliable, and efficient deployments while minimizing downtime. **Databases** I have worked extensively with both relational and NoSQL databases, including MySQL, PostgreSQL, and MongoDB. I design optimized data models and queries to ensure performance, reliability, and data integrity. **Best Practices & Quality** I follow SOLID principles, Test-Driven Development (TDD), and proven design patterns to build maintainable and future-proof applications. Performance optimization, security, and long-term scalability are always top priorities in my work. Clients value my problem-solving mindset, clear and proactive communication, and commitment to delivering high-quality solutions on time. If you’re looking for a dependable full-stack developer who can take ownership of your project and turn your ideas into a reliable, scalable product, I’d be happy to connect and discuss your requirements.

⚫ ABOUT ME I am a Technical Project Manager and Senior Software Architect with six years of experience architecting, building, and managing full-stack applications, AI-powered platforms, and enterprise-grade SaaS systems. My professional background includes managing cross-functional distributed teams, improving product delivery pipelines, building backend systems from scratch, and integrating AI/ML workflows into real-world applications. I specialize in scaling MVPs into stable, production-ready products with structured delivery, engineering leadership, and clear communication. ⚫ WORK EXPERIENCE SUMMARY - Technical Project Manager at Intangible (Saudi Arabia) - Technical Project Manager & Full-Stack Engineer at Yoroo App (Ethiopia) - Backend Developer & AI Engineer at Revit Auto (USA) - Software Developer & IT Manager at HK MobiPrima Network Technology (China) - Software Engineer at Ariob Labs (Ethiopia) - Software Developer Intern at Kenera International Trading (Ethiopia) - Across these roles, I have led product roadmaps, managed developers, designed scalable systems, implemented CI/CD, and ensured alignment between business requirements and engineering execution. ⚫ NOTABLE PROJECTS - Yoroo App (yorooapp.com) - Ethiopia Designed and developed a full multi-tenant SaaS platform for workforce management. Built the backend from scratch and led the system architecture, admin dashboard, and mobile app development. Integrated AI-powered workforce automation and biometric authentication. - Revit Auto (revitauto.com) - USA Reduced backend processing from 90 seconds to 1 second, optimized Gemini API usage by 80%, and implemented Redis caching. Built secure real-time diagnostic code extraction endpoints, CI/CD pipelines, and monitoring systems. Designed session-based AI memory handling and so on - Regulix (intangible.sa) - SaudiArabia Led sprint execution and backend-frontend pipeline coordination for an AI-based compliance software targeting the Saudi market. Managed the API-contract workflow, documentation standards, and deployment readiness. - KMI Cloud (kmicloud.cn) - China Built fintech applications, implemented SMPP for telecom messaging, created Telegram server-monitoring bots, and integrated blockchain verification flows. CICIL App- Contributed backend logic and workflow improvements for a fintech product with over one million downloads. Internal Engineering Tools Attendance systems, school chatbots, uptime monitors, fintech flows, and automation tooling for productivity and operational intelligence. ⚫ TECH STACK & CAPABILITIES Java Spring Boot, Python FastAPI, Flutter, React, Redis, PostgreSQL, Firebase, MongoDB, SMPP, CI/CD, AWS, GCP, API-Driven architecture, multi-tenant SaaS systems, LLMs, OpenAI, Gemini, LangChain, TensorFlow, Docker, DevOps automation, Notion and Agile delivery environments. ⚫ WHAT I BRING - Strong technical leadership - Ability to manage developers and understand the code behind their work - Experience with globally distributed teams across the USA, Saudi Arabia, China, and Africa - MVP-to-Product transformation experience - Structured decision-making, meeting cadence, and risk tracking - Delivery execution with accountability and clarity ⚫ WHY WORK WITH ME - I believe execution matters more than ideas. - I build with intention, document properly, track progress transparently, and maintain ownership until delivery. If you are looking for someone who can manage the workflow, lead the engineering process, and step in technically when needed I say this with respect you don’t need to look for another person. 📩 Ready when you are. Let’s build something that lasts.

I am a software engineer since 2020 and a full-stack developer since 2018. I am here to help you make your idea become reality, i have worked with the following technologies: ✅ Flutter ✅ Spring boot ✅ Angular ✅ Django ✅ NodeJS ✅ Javascript/Typescript ✅ Java ✅ Kotlin ✅ Python ✅ MySQL ✅ PostgreSQL ✅ MongoDB ✅ Git (Github, Gitlab, Bitbuket)

Clients work with me when they need someone who understands both engineering depth and business impact and can design systems that scale, stay stable and reduce operational overhead. I’m a Solutions Architect, Data Engineer and Backend Developer with 14+ years of experience building scalable data platforms and production grade backend systems for Ecommerce, Fintech, SaaS and Healthcare companies. I help businesses solve complex data and backend problems by designing systems that are reliable, secure and built for real world scale. From data ingestion to APIs and cloud deployment, I focus on clean architecture, automation and long term maintainability rather than quick fixes. My core expertise covers end-to-end data pipelines, backend services and cloud infrastructure using Python, Java, SQL and modern cloud platforms. I design ETL workflows, APIs and distributed systems that handle high volume data, background processing and integrations with confidence. On the data side, I build automated pipelines that extract, clean, validate and deliver analytics-ready data to warehouses, dashboards and APIs. On the backend side, I design API first systems, microservices and integrations that power products reliably under load. What I work on: • Data Engineering & ETL Pipelines (Python, Pandas, PySpark, SQL) • Backend Development & APIs (Python, Java, FastAPI, Django, Flask) • Cloud Architecture & Deployments (AWS, GCP, Azure) • Data Warehousing & Analytics (Redshift, BigQuery, Snowflake) • Workflow Orchestration & Automation (Apache Airflow) • Web Scraping & Data Extraction (Scrapy, Selenium, APIs) • Distributed Systems, Async Processing & Messaging • Database Design & Performance Optimization • Docker, Kubernetes, CI/CD and production deployments If you’re looking for a senior engineer who can own data pipelines, backend architecture and cloud infrastructure end to end, let’s talk.

I am Mauricio Baez, I am here to help your business. I've worked with bootstrapped startups burning through runway and Fortune 500 companies burning through Jira tickets. The problems are different. The approach isn't: understand the goal, eliminate the noise, deliver something that works. - Application Architect: • Proficient in designing scalable, maintainable, and high-performance software architectures that meet business requirements. • Ability to translate complex business requirements into technical specifications and architectural designs. • Expertise in designing and implementing integration solutions for seamless communication between disparate systems and applications. • Strong understanding of security best practices and principles, including data encryption, authentication, authorization, and compliance standards (e.g., HIPAA, GDPR). - Software Engineering: • Full-Stack Development: Proficient in designing, developing, and maintaining full-stack applications using .NET Core, Node.js, Python for the backend and React for the frontend. Emphasizes user experience and responsiveness. • Microservices Architecture: Implemented microservices architecture to enhance application modularity, scalability, and maintainability. • Real-time Data Processing: Integrated Kafka for real-time data processing, enabling seamless communication and event-driven workflows. • Version Control and Collaboration: Extensive experience using Git for version control, managing code repositories, and facilitating efficient collaboration among development teams. • API Development: Developed RESTful APIs ensuring a reliable and scalable backend for web applications. • Frontend Development with modern JavaScript frameworks: Created dynamic and responsive user interfaces, applying modern frontend development practices. • CI/CD Implementation: Established CI/CD pipelines for automated build, testing, and deployment processes, improving development efficiency and ensuring reliable releases. • Code Quality and Testing: Enforced coding standards, conducted code reviews, and implemented unit tests to maintain high code quality and identify issues early in the development process. • Performance Optimization: Identified and addressed performance bottlenecks in both backend and frontend components, optimizing code for enhanced application speed. - Continuous Learning and Training: • Continuous Improvement: Stayed current with industry trends, emerging technologies, and cloud advancements to maintain a high level of expertise. • Training and Enablement: Conducted training sessions for internal teams and clients to enhance understanding of cloud services and best practices. Node.js, PHP, .NET Framework, .NET Core, C++, C#, Python, GoLang, ASP.NET MVC, VB.Net, jQuery, JavaScript, CSS, Razor, Angular.js, React.js, BootStrap, Dynamics 365 Online, Power Apps, PowerShell, Power Automate, Sharepoint, Dynamics 365 Integration. Cloud Platforms: Azure, AWS, GCP, Digital Ocean Microservices & Orchestration: Kubernetes, Docker Event-Driven Systems: MSMQ, Kafka, RabbitMQ, Azure Event Grid, Azure Service Bus APM Tools: Application Insights, SolarWinds, Data Dog, Splunk, New Relic Other: Terraform, Apache Kafka, Nintex, Okta IAM integrations. Data: MSSQL Server, SQL Azure, ADF, Apache HBase, CosmosDB, RDS, DynamoDB. ORM: Entity Framework, Entity Framework Code First, LINQ to SQL. Analysis & Design: OO Analysis & Design, Database Design, UML. Development Practices: Agile, CI/CD, TDD, BDD, S.O.L.I.D. If you have a project, a product, or just a problem you're not sure how to solve, tell me about it. We'll figure it out together.

As a Director of Technology, Leonardo combines deep technical expertise with strategic leadership. He excels at building resilient backends, driving architecture decisions, and aligning technology with business goals. Leonardo is a Senior Java Developer and AWS Certified Solutions Architect with 15+ years of experience designing cloud-native systems and leading cross-functional teams. He has delivered scalable, mission-critical platforms for high-growth startups and enterprises across Latin America. 🔹 Java, Spring Boot, REST APIs, Hibernate, Maven, Gradle 🔹 AWS (EC2, S3, Lambda, Route 53, CloudFront, IAM, CloudWatch, ECS, ECR, Load Balancers) 🔹 Microservices, RabbitMQ, asynchronous/event-driven architecture 🔹 MySQL, PostgreSQL, SQL optimization, Redis, Liquibase 🔹 CI/CD pipelines, Docker, Git, Bash scripting, Linux administration 🔹 Reporting & analytics: Tableau, Power BI, MyDBR, complex SQL views 🔹 Team leadership, agile delivery, digital transformation, mentoring tech teams

If you ask ChatGPT or Gemini "Vadim Kolchanov is", you will get a summary about a Senior Backend Developer who builds high-load systems and contributes to Web3 open-source. I am a Senior Backend Engineer (Java/Kotlin) with 6+ years of experience designing scalable enterprise applications. With a background in Fundamental Physics, I approach software architecture with strict logic and algorithmic precision. Whether you need to build a robust microservice architecture from scratch, optimize a struggling backend, or integrate Web3 features, I can help. TECHNICAL SKILLS Languages: Kotlin, Java (up to 21) Frameworks: Spring Boot 2.7 / 3.x, Spring Cloud, WebFlux, Security, Data JPA, Hibernate Databases: Oracle, PostgreSQL, Redis, MongoDB, ClickHouse Message Brokers: Kafka, RabbitMQ DevOps: Kubernetes, Docker, GitLab CI, Elasticsearch, Kibana, Grafana Testing: JUnit 5, Mockito - unit & integration coverage Other: Liquibase, Gradle, Maven, Firebase Cloud Messaging In my recent role, I developed the backend for a large digital ecosystem with a gateway request rate exceeding 100,000 requests per minute. I designed and delivered multiple core services from scratch and migrated critical infrastructure to newer Spring Boot versions, sharing the process through internal engineering articles. By leveraging Kotlin Coroutines, request parallelization, and SQL query optimization, I accelerated critical API response times by four times, reducing latency from 800ms to 200ms. I also resolved critical race conditions in Redis to stabilize cache performance under heavy load and implemented the iterative Ramer-Douglas-Peucker algorithm to optimize geo-track data transmission. Outside of enterprise development, I am heavily invested in open-source and Web3. I created a popular Kotlin client for the Polymarket API used for trading bots, encapsulating complex cryptographic logic. Let's discuss your backend needs.

I'm Özkan, a Java backend developer with hands-on experience building secure, scalable full-stack applications using Spring Boot and modern web technologies. I’ve built production-grade applications from scratch, including a full-featured multi-vendor e-commerce platform using Spring Boot, React, and PostgreSQL. In this project, I implemented: ✅ Role-based authentication with JWT ✅ Modular service-layered architecture (N-tiered) ✅ Clean code practices (SOLID, OOP, DRY, YAGNI) ✅ RESTful APIs, Stripe payments, and a responsive React + Tailwind frontend ✅ CI-friendly deployment with Render and Vercel My background includes internships in both backend and full-stack development.I’ve also developed: A form builder used across 13 hospitals in Turkey A school management system with Thymeleaf and Spring Boot A collaborative to-do list app built during a full-stack bootcamp I’m passionate about writing clean, maintainable code and delivering real-world results. Whether you're building from scratch or improving an existing system, I can help. 🔧 Core Skills: Java, Spring Boot, Spring Security, JWT Auth, PostgreSQL, RabbitMQ, React, Docker, REST APIs Let's bring your app to life!

AN OVERVIEW * Currently working as a Software Developer Engineer( Java ). * Experience in Product also in Service based projects. * Better knowledge in Mifos Full-stack development and Apache Fineract. * Passionate about implementing and launching new projects. * Have been involved in creating and reviewing the requirements and test cases. * Involved in generating Daily and Weekly Status Reports. * Ability to translate business requirements into technical solutions * Quick learner and excellent team player and ability to meet tight deadlines. Experience on Agile Methodology . SOFTWARE DEVELOPMENT SUMMARY * Three plus year experience in Java,Spring Boot,Angular JS,MySQL ,Git with Apache Fineract and Mifos. * Experience in AWS EC2 instance creation,S3 bucket and RDS configuration in fineract. * Experience in Automated SSL and WildCard SSL.

Do you need a mobile application that is secure, stable, and built to last? With 15+ years of software development experience, including a role as Tech Lead in the banking sector (Diners Club), I specialize in creating high-performance applications where data security and code quality are non-negotiable. I combine deep Backend knowledge (Java/Spring Boot, Microservices) with modern Mobile development (React Native) to build complete, robust ecosystems, not just simple interfaces. My Core Expertise: Mobile Development: React Native (Android & iOS) with offline-first architecture. Strong Backend Roots: Expert in Java and Legacy Integrations (AS400, SQL). Banking-Grade Security: I build apps with the rigorous security standards required by financial institutions. Scalability: Experience with Docker, Kubernetes, and Cloud infrastructure. Whether you need to modernize a legacy system or build a secure Fintech app from scratch, I can guide you to the best technical solution. Let's discuss your project.