I build AI features and SaaS MVPs fast for product teams that need working software, not slide decks. Clean FastAPI backends and React UIs. RAG that answers correctly. I'm Naresh Tappatla, a Senior Full Stack Engineer with 14.9+ years in production web platforms and AI features. Top Rated on Upwork with 100% Job Success and 22,500+ hours billed. I've delivered 19 end to end builds. I ship production AI assistants, private RAG over company knowledge, workflow automation, and summarization pipelines. On the platform side I build FastAPI microservices with clean REST APIs. Frontend work in React with TypeScript that is accessible and testable. Easy to change. For orchestration I use LangChain with well scoped prompts and evaluation runs. LLM flows are traceable so your team can inspect behavior. OpenAI APIs come with detailed logging and guardrails. Backend, Python and FastAPI. Node.js where it fits. Databases, PostgreSQL and MongoDB. Cloud, AWS with Docker and Kubernetes. CI and CD for repeatable, secure releases. What I can help with: - AI assistants for support or ops. OpenAI plus LangChain with clear prompts and evals. - Private RAG over S3 docs or database content, with chunking and embeddings, plus citations. - FastAPI microservices and REST APIs that are versioned and well tested. - React and TypeScript interfaces with form handling and auth, with state tied to the API. - Summarization and workflow automation over queues or webhooks. - AWS deploys with Docker and Kubernetes. CI and CD pipelines. How I work: - Short discovery to clarify goals and data. Constraints noted up front. - Written scope with milestones and realistic timelines. - Prototype or API spec in 48 to 72 hours for early validation. - Weekly demos and async updates. No surprises. - Clean Git history with small PRs and code reviews. - Handover with docs and API references, plus runbooks your team can own. I'm based in IST with flexible overlap for US and EU hours. Share your context and I'll send a concise plan and timeline, plus a quick PoC so you can check direction before we build the rest.

I have great experience in building small and big distributed high load applications. I can create to you high-quality and stable application using new technologies. Technical skills: ∎ ASP.NET Core + MVC | ∎ C# | ∎ VB.NET | ∎ WPF | ∎ Web API (REST/XML/JSON) |∎ Web Services |∎ Telerik & DevExpress controls| ∎ Xamarin cross-platform | ∎ LINQ | ∎ jQuery | ∎JavaScript | ∎ Angular | ∎ HTML5 | ∎ CSS3 | ∎ Bootstrap 4&5 | ∎ KendUI ∎ Database: • MSSQL Server • No-SQL (Dynamo Db, Azure Cosmos Db and MongoDB) • MySQL • SQL queries & stored procedures • Entity Framework ∎ VERSION CONTROL TOOLS: • SVN • GitHub • Bit Bucket ∎ ISSUE MANAGEMENT TOOLS: • Azure Dev Ops • Atlassian-JIRA • Trello • Wrike ∎ DEVELOPMENT TOOLS: • Visual Studio 2019+ • Sourcetree

I design and ship production macOS and iOS apps in Swift and SwiftUI, going deeper than most: virtual cameras, system audio capture, Accessibility-API automation, BLE device integrations, and the App Store release pipelines that get it all out the door. What I've shipped: Consumer iOS/macOS apps on the App Store — pet-safety monitoring with CloudKit two-device pairing, a SwiftUI menubar calculator, BLE health-device apps that reverse-engineer defunct hardware to keep it alive, and voice-transcription utilities monetized with StoreKit/RevenueCat System-level macOS — CoreMediaIO virtual cameras, ScreenCaptureKit capture, on-device AI overlays (WhisperKit + Foundation Models), and deep Accessibility-API automation to drive native apps that expose no API Production backend + clients — a Node.js/TypeScript WebSocket backend (Redis + PostgreSQL, horizontally scaled behind an ALB) bridging real-time messaging to CRMs, with native macOS and Windows clients Cross-platform desktop ecosystems — coordinated releases across macOS (Swift), Windows (.NET/WPF, Flutter), and Safari/Chrome/Firefox extensions Open source — I maintain forks of well-known macOS tools and a C++ routing engine, so I'm at home in large, unfamiliar codebases How I work: I take full ownership from concept to shipped product — architecture, implementation, signing/notarization, App Store submission, and release automation. I also step into technical-lead roles: setting architecture, aligning multi-repo systems, and bringing structure to projects that have outgrown their original design. My background spans CNC/CAD/CAM and manufacturing, which is why I'm especially effective on software-driven workflow optimization — turning manual, error-prone processes into reliable automated tools. Best fit for clients who need senior-level execution and decisive progress: someone who owns a hard problem end to end rather than waits for specs. If that's what you need, message me — happy to talk specifics.

I am a Senior Embedded Linux Programmer and IT/Infrastructure Consultant with nearly 40 years of overall development experience. I specialize in getting tough hardware and networking projects off the ground—or rescuing existing projects that have hit a wall. Because my background spans the entire stack—from bare-metal custom Linux kernels to advanced enterprise server configurations—I can troubleshoot and build systems that most single-discipline developers cannot. Here are my core areas of expertise: • Embedded Linux & BSP: Custom firmware, kernel drivers, and deep optimization for SoC boards (Raspberry Pi, Orange Pi, NanoPi, etc.). I have extensive experience with Buildroot, Yocto, MAC-PHY communication, and precision timekeeping (PTPv2/IEEE 1588v2). • Networking & Telecom: 7+ years building 4G/LTE protocols (MAC-level, EPC, QoS). I regularly handle BGP routing issues, VPN implementations (IPsec/StrongSwan), and complex traffic convergence. • Edge AI & Computer Vision: Building optimized pipelines for video surveillance, real-time object tracking, and deploying AI models directly on edge devices. • Infrastructure & Email Systems: Advanced Postfix customization. I routinely design secure email obfuscation workflows, generate robust SPF/DKIM records for domains, and manage complex DevOps tasks like cloud migrations and remote work infrastructure. Zabbix and Grafana infrastructure monitoring, custom agents, alerting and visualization. Past Successes: • Led the full-lifecycle development of the MaxBridge 4G solution, successfully deployed across four countries. • Core BSP Engineer on the highly successful Carsifi project. • Rework old systems with new core elements, incorporating existing hardware protocols. I don't just write code; I solve system-wide problems. If you need someone who understands exactly how your hardware talks to your network, send me a message and let's discuss your project.

Hi! I'm a full-stack developer who ended up specializing in a weirdly specific niche: taking things that almost work – a rough AI idea, a half-finished MVP, someone's vibe-coded weekend project – and turning them into something a real business can actually run on. I take on projects at any stage – from a blank page and an idea, to an existing codebase that needs new hands on it. I've been building software professionally for years, and the work that gets me genuinely excited right now is at the intersection of AI and practical business systems: agents that quietly take hours of manual work off someone's plate, dashboards that finally show a founder what's actually happening in their business, and MVPs that go from "idea on a whiteboard" to "thing customers are using" faster than most teams think is possible. ☑️A bit about how I got here I started out doing classic full-stack work – websites, web apps, the usual. Somewhere along the way I noticed a pattern: the most interesting projects weren't "build me a website," they were "we have this process that's eating 10 hours a week, can you make it disappear" or "we tried to build this ourselves with AI tools and it's held together with tape, can you fix it." That's where I've stayed ever since. ☑️What I actually do → AI agents & automation – I build agents that handle real work: customer support triage, report generation, data entry, internal admin. Not chatbot demos – things that replace hours of someone's week, every week. → Custom business systems – CRMs, internal dashboards, workflow tools built around how your team actually works, not around a template you have to bend your process to fit. → SaaS MVPs – if you have an idea and need to see it as a real, clickable product fast, this is probably my favorite type of project. Weeks, not months. → Rescuing stuck projects – this might be the thing I'm most known for at this point. Half-finished builds, AI-generated ("vibe-coded") apps that worked in a demo and fell apart with real users, code from a developer who disappeared mid-project. I go in, figure out what's actually salvageable, and get it to a stable, shippable state – almost always without needing a full rebuild. → Web & mobile development – still very much in my toolkit when that's what the project actually needs. ☑️How I work I don't start typing code the moment a job is posted. I ask questions first – sometimes annoyingly many of them – because building the wrong thing fast is worse than spending an extra hour making sure we're building the right thing. Once we're aligned, I move quickly, communicate proactively (you'll hear from me before you have to ask "any update?"), and I'm honest early if something in the original plan doesn't make sense anymore. If you're not sure exactly what you need – just a business problem and no spec – that's a completely normal place to start a conversation with me from. ☑️A few results from recent projects ·Rebuilt a client's internal CRM around their actual workflow → 35% increase in operational capacity ·Automated order syncing for a manufacturing client → 8–12 hours saved per week ·Took over a 500-page Figma design that needed real engineering behind it → delivered a working, production-ready MVP on schedule ·Picked up a stalled, partially AI-generated MVP that broke under real traffic → stabilized it into a product the client could confidently launch ☑️When it makes sense to reach out · You have a manual process eating your team's time and suspect AI could kill it · You need a CRM, dashboard, or internal tool that fits your actual workflow, not a generic template · You started building something yourself (with AI tools or otherwise) and it's not quite production-ready · You have an idea and want to see a real MVP fast, not a six-month roadmap · You just want a second opinion before committing budget to a build – happy to do a quick, honest audit first Send me a message with what you're working on. Even if it's half-formed, that's a fine place to start.

All stuff you can see here ... (github nickname rogvulf) C/C++ (STL, SFML,BOOST,Multithreading) Game development

Hello, Future Partner! I am an Expert Full-stack WordPress Developer from Ukraine with over 10 years of experience in crafting visually stunning, high-performance websites and landing pages tailored to your business needs. Whether you're aiming to establish a dynamic blog, launch a thriving e-commerce store, or create a compelling landing page to boost conversions, I'm here to help. I understand the importance of a captivating online presence to drive customer engagement and conversions. My approach prioritizes aesthetics, speed, and functionality, ensuring that your website not only looks great but also delivers seamless user experiences and effectively drives sales. Partner with me to: Elevate your online presence Propel your business to new heights Create a website that captures attention and inspires action ⭐️ My Skills: ✔️ Programming Languages: PHP, JavaScript ✔️ Frameworks: Laravel, YII, Symfony ✔️ CMS: WordPress (WooCommerce), OpenCart, Shopify ✔️ Databases: MySQL, SQLite, PostgreSQL, Firebase, NoSQL, T-SQL ✔️ APIs: XML, JSON, REST ✔️ Front-end: CSS, HTML, SASS, LESS, Bootstrap ✔️ JavaScript Frameworks: Angular, Node.js, Vue.js, Ionic, React, Next.js ✔️ Version Control: Git, Bitbucket ✔️ Project Management: Trello, Jira, Podio, Asana, Basecamp ✔️ Operating Systems: Windows, Linux, MacOS I am committed to delivering projects on time and bringing them to a successful conclusion. Let's collaborate and create something exceptional together!

I am an experienced developer and programmer with 25 years of experience in industries including manufacturing, medical, financial, law, construction, and more. I specialize in designing and enhancing Microsoft Access applications that feel modern, user-friendly, and efficient—whether they use an Access backend or a full SQL Server backend for increased scalability and performance. With extensive experience in both new system development or legacy systems upgrades, I can help you build, repair, or optimize your database without disrupting your workflows. I create application-like forms with intuitive navigation and clean dashboards, with modules including Human Resources, Shipping, Finance, Invoicing, or areas that fit your business needs. I also incorporate built-in error handling to ensure smooth daily use. I have deep experience fixing broken functionality and modernizing older Access applications while preserving current business logic. My skill set includes writing efficient SQL queries (Access SQL or T-SQL), building automated data processes, and optimizing systems for long-term performance, reliability, and ease of use. Deliverables • Build customized ERP, CRM, or industry-specific systems using a wide range of MS Access and SQL Server templates from my development library • Repair or optimize slow, broken, or outdated VBA code • Automate data import/export between Access, Excel, CSV, or external systems • Convert current Excel spreadsheets into a customized database application • Create clean, centralized switchboards/navigation menus • Generate detailed, dynamic reports • Set up data backup processes • Integrate PDF forms directly into Access workflows Reporting • Provided detailed, real-time reports and analytics through advanced automation that intelligently adapts to and mimics your business logic including: • Informational Reports • Statutory Reports • Department Reports • Vertical & Lateral Reports • Analytical Reports • Progress Reports • Research Reports • Operational Reports • Internal Reports • Strategic Reports • Industry Reports • External Reports • Project Reports • Product Reports • Insert charts and graphs to provide clear visual insights into the company’s performance Backend Options • Microsoft Access backend for smaller, lightweight databases • SQL Server backend for high-performance, multi-user, or enterprise environments Security Features • Password-protected login system • Role-based access (Admin, Standard User, Optional Restricted User) with customized permissions set by user levels I’d welcome the opportunity to discuss your goals and show how I can deliver a clean, reliable, and efficient Access solution tailored to your needs. Examples of my work can be provided upon request.

✔Expert in Java ✔5000+ Hrs worked on Upwork ✔16+yrs Experience ✔Problem Solver Sun Certified Java Programmer with 16+ Years of Professional Experience in Enterprise Application Development. I have excellent Coding Skills and follow Industry Standards to code Scalable Applications that can be deployed on Cloud or On-Premises or Container or Kubernetes or Hybrid Platform. ✅I specialize extensively in Java: ✓ Back-End Frameworks: Spring Boot, Spring, Hibernate, JPA, JSP, Servlets, Java ✓ Front-End Frameworks: Angular, ReactJS, JQuery, and JavaScript ✓ Other Frameworks: Apache Storm, Hadoop, JPPF, ElasticSearch, Hazelcast, Spring Cloud ✓ Cloud Computing: AWS, Google Cloud, Digital Ocean, and Heroku ✓ Security: OAuth2, OpenID Connect, JWT, LDAP, X.509, Kerberos, Social Logins, SSO ✓ Databases: MS SQL, MySQL, Oracle, PostgreSQL, MongoDB, HBase ✓ CI/CD and monitoring: CI/CD using Gitlab, CI using Jenkins and Bamboo, Kubernetes ✓ Agile Methodology: Scrum and Kanban using project management tools like Jira, Pivotal Tracker, Gitlab, etc. ✅My core competence lies in providing End-to-End Solutions to Enterprise Application Development for the Financial, Marine, and Telecom domains. ✅ How can I help you ✓ I can handle your all end-to-end requirements analysis, development & delivery so you can focus on your sales & operations ✓ I can extend/develop your MVP product to production-ready ✓ I can develop products from scratch until the final delivery and support with maintained code quality and proper code coverage ✓ I can choose the right technology stack and tools for your solution based on real needs and can save costs ✓ I can manage the team, do code reviews, handle CI/CD and releases, support live systems ✓ I can understand and implement the most difficult parts of software systems ✅ Expert Areas ✓ Java-based back-end frameworks like Spring Modules (Spring MVC, Spring Security, Spring AOP, Spring Rest, Spring Data/JPA) ✓ Microservice & Cloud native architecture for developing SaaS-based system ✓ RDBMS (MySQL, PostgreSQL, Oracle) ✓ Docker, Kubernetes, OpenId, SSO, SAML, ✓ Graph/Document Databases MongoDB and DynamoDB ✓ Microservices-based architecture implementation with Spring boot, Spring Integration, and Apache Camel ✓ AWS experience with Serverless, RDS, SQS, SNS, SES, S3, VPC, Cloudformation, ECS, Lambda, Cognito and EC2 ✓ AWS API implementation experience ✓ Queue-based implementations with RabbitMQ, ActiveMQ, SQS, and SNS ✓ Test-driven development implementation with unit and integration test cases with JUnit/TestNG + Mockito + Spring ✓ Database integration frameworks like JDBC/Hibernate/Sprint Data (ORM) and Spring Mongo ✓ REST-based Web Service/API implementation with Spring REST ✓ CI/CD implementation with (Bamboo + Jenkins + Maven + Nexus + GIT(Bitbucket/Gitlab/Github) ✓ Payment Gateways implementations like Stripe with Debit/Credit Card Integration ✓ Solr/Lucene/ElasticSearch search engine integration ✓ Agile Methodology ✓ Experience with implementing very complex queries with MySQL DB ✓ Java-based Servers Tomcat/JBoss ✓ Repositories like Git, SVN

I can help turn your ideas into reality! I have experience with modern full-stack web apps, desktop/mobile apps, and even full backend architecture & design! I've been developing and working on projects for 10 years, and have built many production-ready apps/websites which have been used by hundreds of thousands of users! My goal is to write clean, maintainable code to help you solve your problems as quick as possible. What I can do for you: - Full-stack web applications (Laravel/PHP, NextJS/React) - Desktop & cross-platform apps (Flutter / C# / Python) - Backend APIs and system design (AWS, Docker, CI/CD) - Fixing, improving, and scaling existing codebases Tech I work with daily: - Backend: Laravel / PHP, Python, C#, React/NextJS - Frontend: React/NextJS, TailwindCSS, Blade, Vue - Desktop & Cross-Platform: Flutter, C#, Python - Databases: MySQL, PostgreSQL, Firestore - DevOps: Docker, CI/CD, AWS