I’m a seasoned full-stack developer specializing in building scalable, high-performance web and mobile applications. With a strong focus on the MERN stack, AWS serverless technologies, and DevOps practices, I deliver end-to-end solutions that are robust, secure, and optimized for performance. My expertise also includes Python, Supabase, PostgreSQL, Microservices, and modern deployment platforms like Netlify and Vercel. Core Expertise: Frontend Development: ReactJS, NextJS, GatsbyJS, Redux, Angular, VueJS Backend Development: Node.js (Express.js, JWT Auth, GraphQL, Socket.io, Redis, Sequelize, Mongoose), Python (Django, Flask), .NET (ASP.NET, MVC, .NET Core, C#) Mobile Development: React Native Database & Storage: PostgreSQL, MySQL, SQL Server, NoSQL (DynamoDB, CosmosDB, MongoDB, Elastic), Redis, S3, BlobStorage, EBS Serverless & Microservices: AWS Lambda, API Gateway, SNS, SES, SQS, RabbitMQ, Azure Service Bus DevOps & Infrastructure: Docker, CI/CD pipelines (AWS CodePipeline, CodeBuild, CloudFormation, Azure DevOps, Jenkins), ECS/AKS clusters, Nginx, Heroku, Bash scripting, Linux Modern Deployment Platforms: Netlify, Vercel API Development: RESTful APIs, GraphQL, Ocelot, Envoy, Custom Authorizers Notifications: SNS, SMS, SES email, Mobile Push Notifications, Pusher Infrastructure as Code: AWS CloudFormation, VPC, ELB/ALB, Route53, CloudFront, Lambda@Edge, EC2 Deep Focus on MERN Stack & AWS: MERN Stack Mastery: Extensive experience in building modern, scalable applications using MongoDB, Express.js, ReactJS, and Node.js. From dynamic frontends to high-performance backends, I ensure seamless integration and optimal performance. AWS Serverless & DevOps: Proven expertise in designing and deploying serverless architectures using AWS Lambda, API Gateway, S3, DynamoDB, and more. I also specialize in setting up automated CI/CD pipelines, containerized deployments with Docker, and managing highly available, autoscaled ECS clusters. Why Work With Me? End-to-End Solutions: From concept to deployment, I deliver seamless, scalable, and secure solutions tailored to your business needs. Proven Expertise: I’ve successfully delivered projects across diverse industries, leveraging cutting-edge technologies to drive results. Collaborative Approach: I work closely with clients to ensure their vision is realized, providing regular updates and transparent communication. Let’s connect and turn your ideas into reality! Whether you need a dynamic web application, a robust backend system, or a scalable cloud solution, I’m here to help you achieve your goals.

"Truly amazing developer. Very smart, organized, and knowledgeable. A true pleasure to work with him. I highly recommend him. A+++++" Hi, Sergey here. I am a highly skilled developer from Ukraine. When you hire me, my main goal is to make your project run successfully. I specialize in web development, Python\Bash\Powershell\NSIS scripting, and desktop development. I have a long track record of projects for web: - development of e-commerce websites, building custom blogs, landing pages, fixing custom scripts and much more; - customizing existing web solutions (securing poorly written scripts, extending the functionality of existing scripts, mobile-friendly and adaptive web design, CSS/JS bug fixes); - implementing plugins and themes for Wordpress. I am an expert in development for Windows OS: - Powershell scripting - installers of any complexity; - Windows services; - parsers/scrapers; - shell extensions; - browser add-ons; - network utilities etc I provide websites security services : - investigation of compromised websites - web scripts audits - weblogs analysis - fixing bugs in existing scripts - measures to prevent intrusions in future I specialize in Python development: - websites parsing and crawling; - automation of OS tasks (bulk image and file processing, various automation); - computer vision projects. There are 4 rules I follow in my work: 1) I have used to do work of high quality and my reputation is the most important to me; 2) I try to avoid conflicts with my clients; 3) If I bid on a project, be sure I'll be able to do it within a specified time frame or faster; 4) I don't bid on projects if I doubt or not confident If you feel I am the exact guy you are looking for, please send me a note about your project and your goals. If it seems like a good fit, then we can discuss it.

I am a US-based Computer Scientist, Technical Architect, and AI Solutions Engineer with 30 years of experience. I am certified as Expert Vetted on UpWork (top <1% of all users), with 5-star rating, rave reviews, and 100% success score. ➤ Career Highlights I've worked with startups, Fortune 500 companies (Ford), and government agencies (CDC), and have held executive roles (CTO, CEO) at two successful startups doing millions in revenue with products reaching tens of millions of users worldwide. I also author and maintain open source libraries downloaded 25+ million times per month, used in production at GitHub and Microsoft. GitHub uses them in their core infrastructure and is one of my financial sponsors (more info below). ➤ What I Do I design and build software systems that scale — from architecture blueprints and database infrastructure to full production applications (backend, infrascruture, frontend, and more). My recent focus has been on AI-powered platforms, including LLM integration, AI agent development, multi-agent orchestration, and tool-calling pipelines using OpenAI, Claude, and open source models. ➤ AI & Agentic Development I build production AI systems — not wrappers around ChatGPT. Recent work includes multi-agent orchestration with tool-calling loops, MCP server development for document analysis, LLM-powered scoring and recommendation engines, and AI-assisted codebase analysis across 170k+ line codebases. I work daily inside Claude Code, OpenAI, and OpenRouter APIs. ➤ Why Technical Architecture Matters Most technical projects fail because they have a poor architecture blueprint — or none at all. Most developers aren't architects, and without the right foundation, even projects that make it to launch grind to a halt within months as technical debt makes it impossible to build further. I create full "bone structures" on the code, database, and server levels that establish patterns developers can build on confidently. By mapping out growth tracks early, we ensure the system can scale without endless rewrites. This is the difference between another great idea that stalls and a multi-million user success story. ➤ Open Source I wrote and maintain multiple open source libraries used worldwide, collectively downloaded over 25 million times per month. Highlights include the TypeScript compiler tools (~3M/month), node-html-parser (~20M/month), and node-html-markdown (~1.4M/month). GitHub itself financially sponsors this work, which is part of their core infrastructure. ➤ Working with Me I partner with startups, established companies, and enterprise teams who need expert-level architecture, AI integration, or full-stack development. I often deliver 2-4x faster than typical senior developers — clients regularly find the final cost beats offshore alternatives, because it's done right the first time and delivered faster. ➤ UpWork Stats ⁍ Expert Vetted (top <1%) + Top Rated Plus ⁍ $400k+ completed, 5-star rating ⁍ Rave reviews (most clients leave multiple reviews per project) ⁍ Almost all clients form long-term partnerships ➤ More Info ⁍ UpWork Reviews: See below ⁍ GitHub: nonara (pinned projects are all maintained by me) ➤ Keywords TypeScript, JavaScript, Node.js, Python, React, PostgreSQL, MySQL, AWS, Docker, Kubernetes, Electron, C#, .NET, Swift, Prisma, Redis, GraphQL, REST API, Next.js, FastAPI, Flask, Terraform, Pulumi, Shopify, AI Agent Development, LLM Integration, OpenAI API, Claude API, MCP Server, Model Context Protocol, Multi-Agent Systems, Tool-Calling Pipeline, RAG, Prompt Engineering, Context Engineering, Claude Code SDK, SWE-Agent, AI Agent SDK, Multi-Agent Orchestration, Web Scraping, Playwright, Browser Automation, Browser Extension Development, Chrome Extension, Cross-browser Extension, Solutions Architecture, Database Optimization, Infrastructure as Code, DevOps, CI/CD, Full-Stack Development, Technical Leadership, Code Rescue, ANTLR, CEF, Chromium Embedded Framework, ts-patch, TypeScript Compiler Plugin, TypeScript AST, TypeScript Compiler, Compiler Design, Language Server Protocol, LSP, Parser Development, BrowserView, Embedded Browser, Desktop Application, node-html-parser, node-html-markdown, V8 Engine, PostgreSQL V8, Custom Protocol, Reverse Engineering, Packet Analysis, WireShark Plugin, ArtNet, DMX, pcap, Database Forensic Recovery, IPv6 Scraping, Shopify App, Remix, Angular, PHP, Bash, OAuth, Auth0, SSO, JWT, WebRTC, SocketIO, Monorepo, Webpack, Vite, WordPress, n8n, Node-RED, Twilio, Stripe, GitHub Actions, GitLab CI, React Native, Firebase, pgvector, Embeddings, Vector Database, SaaS Architecture, Multi-tenant

I’m a DevOps and Cloud Engineer with 5+ years of proven experience helping businesses automate, scale, and secure their applications and infrastructure. I specialize in Kubernetes and AWS, delivering solutions that are not only highly available but also cost-efficient. Over the years, I’ve helped startups and enterprises scale their platforms to serve users across multiple regions globally, optimizing infrastructure to handle millions of requests while reducing cloud costs by up to 30%. My goal is to bring the same level of scalability, reliability, and efficiency to your business so you can grow without limits. In addition to core DevOps practices, I specialize in workflow automation using n8n, no-code/low-code agents, and AI-driven task orchestration — helping businesses modernize and scale their operations with minimal overhead. 🔑 Core Competencies: Cloud Platforms: ✅ AWS, GCP, Azure, Hetzner, DigitalOcean: Designing and managing scalable cloud architectures tailored to your business needs. Containerization: ✅ Docker, Kubernetes, Helm, OpenShift: Proficient in containerization technologies for efficient application deployment and management. ✅ Docker Compose, Docker Swarm, GKE, AKS, EKS: Expertise in orchestration and container management. CI/CD Automation: ✅ GitHub Actions, GitLab CI, Jenkins, CircleCI: Building and maintaining automated pipelines to accelerate your development cycle. ✅ Bitbucket Pipelines, Tekton, ArgoCD: Ensuring continuous delivery with minimal downtime. Infrastructure as Code (IaC): ✅ Terraform, CloudFormation: Automating and managing infrastructure efficiently for consistent deployments. Workflow Automation & No-Code/Low-Code Agents: ✅ n8n, Zapier, Make.com (Integromat), Hugging Face Agents – Creating dynamic, event-driven workflows and automation pipelines. ✅ Custom and AI-powered agents for business process automation, task routing, and integration with APIs, databases, and third-party services. Programming & Scripting Languages: ✅ Golang, Python, Bash, Node.js: Strong skills in programming and scripting for automation and application development. Monitoring & Logging: ✅ Prometheus, Grafana, ELK Stack, Cloud Logging: Implementing comprehensive monitoring solutions to ensure system reliability and performance. ✅ CloudWatch Logging, Kibana: Proficient in setting up alerts and dashboards for proactive monitoring. Platform Engineering & Developer Experience (DevEx): ✅ Internal developer platforms (IDPs), Backstage.io, GitOps workflows – Improving team velocity and operational maturity through standardization and automation. 🌟 Soft Skills: ✅ Communication, Self-Learning, Self-Management, Leadership: Key soft skills that enhance collaboration and project success. ✅ Fluency in English: Comfortable and easy to communicate with clients and teams. 🌟 Why Choose Me? ✅ Proven Expertise: Successfully delivered projects for clients across various industries, ensuring on-time delivery and exceeding expectations. ✅ Comprehensive Solutions: From initial architecture design to deployment and ongoing management, I handle all aspects of your cloud infrastructure. ✅ Client-Centric Approach: I prioritize understanding your unique business needs to deliver solutions that add real value. 🤝 Let’s Work Together: Whether you’re a startup looking to scale, a SaaS platform needing automation, or an enterprise in need of robust cloud solutions — I’m here to help you achieve your goals. I offer full-cycle support from architecture and infrastructure to workflow automation and agent-driven integrations. Let’s connect and bring efficiency, scalability, and innovation to your infrastructure.

Hi, I’m Prince Kumar, a Certified AWS & Kubernetes expert with over 2 years of experience helping businesses run their applications smoothly and securely in the cloud. I specialize in DevOps, Cloud Infrastructure, and Site Reliability Engineering (SRE). I help companies: Automate deployment and operations with CI/CD pipelines Manage and optimize AWS cloud environments Ensure applications are scalable, secure, and always available Monitor and troubleshoot systems to prevent downtime I’ve successfully worked on multiple projects, improving system performance, reliability, and cost efficiency. My goal is to make your cloud systems robust, efficient, and worry-free so you can focus on growing your business. I’d love to collaborate with you through Upwork to help streamline your cloud operations and automation processes.

With over 10 years of experience in the IT industry, specializing in DevOps and Cloud technologies, I bring a deep understanding of designing, implementing, and managing cloud solutions. My professional journey has been shaped by my work with leading system integrators and consulting companies, where I honed my skills and delivered impactful, enterprise-grade solutions. Key Skills: - Cloud Architectures ☁️ - Advanced Kubernetes (K8s) Optimization ☸️ - Infrastructure as Code (IaC) 🛠️ - CI/CD Pipeline Development ∞ - Automation & Orchestration ⚙️ - Security Best Practices 🛡️ - Scalability & Performance Optimization 🏎 - Advanced Infrastructure Monitoring 📊 - Cost optimisation 💰

I help CTOs and founders ship faster, cut infrastructure spend, and sleep better at night. With 15+ years in production operations, I design, harden, and automate Linux-based systems across AWS, Google Cloud, and DigitalOcean, delivering reliable, secure, and cost-efficient platforms for healthcare, finance, and public-sector teams. WHY CLIENTS HIRE ME 1. Proven enterprise trust (Top Rated Plus): large, successful contracts; consistent 5-star outcomes 2. Operational excellence: 99.9%+ uptime architectures, zero-/near-zero-downtime migrations, robust rollback plans 3. Real savings: helped clients reduce infra costs by $700K+ through right-sizing, consolidation, and automation 4. Security first: layered hardening (WAF, iptables, DNSSEC), least-privilege access, audit-ready logging WHAT I DELIVER - DevOps & Automation: CI/CD, immutable builds, environment parity; Ansible & Bash at scale - Cloud & Containers: design/ops on AWS | GCP | DigitalOcean; Docker & Kubernetes (incl. k3s) for resilient apps - Web & Networking: Nginx/Apache tuning, HA, SSL/TLS, Bind9/DNS, HAProxy load balancing - Email & Deliverability: Postfix, Zimbra, Mautic, Postal; SPF/DKIM/DMARC alignment and sending infrastructure - Monitoring & Reliability: CheckMK and Zabbix visibility, alerting that reduces MTTR Message me with your current stack and goals, I’ll propose a lean plan that reduces risk, controls cost, and gets you to green faster.

🏆 Top Rated 🏆 Computer engineer with experience over 11+ years as a Certified Linux Admin and 7+ years as a Devops. Excellent at developing and maintaining client/server applications. Expertise - *****AWS*****GCP***** AZURE*****Proxmox**** Linux (Certified) AI Engineer | Openclaw | LiteLLM | OpenwebUI ( almost every majorly used AI solutions, updated ) Setting up Agentic AI Proxmox and other VM specialist Firewall deployment (OpnSense ,Draytek etc) Backend and frontend app installation,management and maintenance. WordPress Developer Scripting (bash, perl etc) Docker, Kubernets, Helm Chart, Terraform, Ansible,Jenkins, Git etc PHP developer Python Developer cPanel/Hostinger/WHMCS/Plesk Streaming and OTT Mailserver configuration (Postfix, Dovecot etc) Proxy Servers WordPress optimization Everything related to Linux and Servers. Why should you hire me? + Strong frontend, backend architecture, and database knowledge + Delivering the products on/before time + High Quality of work + Always up-to-date with the latest technologies Soft skills: + Time management + Teamwork + Communication

🏆 Microsoft's Most Valuable Professional Award - 3rd time in a row!!! ⭐⭐ 🏆Guinness Record holder (Microsoft App Fest) 🏆Consistently ranked as top 0.01% developers in Stack Overflow ⭐ 350+ Successful Projects Worldwide 🏅 Excellent Client Review / Portfolio 🏅 15+ Years of Experience 🏅 Worked with 150+ Companies Worldwide ⭐Certified Devops & AWS Developer. ✅ Devops Architect / Consultant ----------------------------------------------------------------------------------------------------- Greetings, I am Sadhik from Manin Software I would like to introduce about myself and my team. We are a team of Devops Experts, Mentor (Careers, Personal, Full Stack Web Development), Open Source Contributor & Specialist in Devops, AWS, Enterprise Web Application Development with specialisation in Front End Engineering, User Experience and Web App Development. 👉 Cloud : AWS, GCP, Azure 👉 Operating systems : CentOS, RedHat, Ubuntu, Debian, CloudLinux. 👉 Automated deployment : Terraform, Cloud Formation Template, Ansible, Bash, 👉 CI/CD implementation : Jenkins, Go CD 👉 Monitoring and logging: Prometheus, Zabbix, Grafana, ELK/EFK, Cloudwatch 👉 Dockerization and orchestration: Kubernetes, Docker, Docker Swarm 👉 IaC implementation : Terraform, CloudFormation 👉 Microservices infrastructure design, development, and implementation: Docker, Kubernetes 👉 Configuration management: Ansible, chef 👉 Database management : MySQL, MariaDB, MongoDB, PostgreSQL, RDS, 👉 Mail servers : Exim, Postfix, Qmail, SES 👉 Web services : Apache, Nginx, Litespeed 👉 Virtualization : Xen, KVM, VmWare ESXi, OpenVZ 👉 Hosting panels : cPanel/WHM/Plesk/Webmin/VirtualMmin/VestaCP/CWP/SolusVM/Virtualizor In addition, my team comprises of expert professionals belonging to different domains and platforms. Therefore, we are capable of converting any type of ideas/dreams under any domain into a quality product with a challenging low cost.

DevOps and Kubernetes engineer, 14+ years keeping production infrastructure alive on AWS and Azure. CKA, CKS, AWS Solutions Architect, Azure AZ-104/AZ-500, Red Hat Certified Engineer, Terraform certified. When your cluster keeps falling over, a CI/CD pipeline takes an hour to ship, your cloud bill climbs with nobody able to explain why, or an AI feature that worked in a demo won't survive production - that's usually when someone calls me. PROBLEMS I SOLVE Your Kubernetes cluster has recurring failures - 503 errors, pod crashes, or unpredictable performance. I dig into what's actually running before I change anything, then fix the root cause. One team had been chasing an AKS API gateway issue for two weeks; I found it and fixed it in a day. Their words: "immediate and permanent solutions." Your CI/CD pipeline takes too long and nobody trusts it to ship safely. I set up Jenkins, GitHub Actions, GitLab CI, or Azure DevOps with GitOps so every change is reviewed and reversible. At one client I took build-to-deploy from 40 minutes to under 12 and moved releases from weekly to daily. Your cloud bill is climbing and nobody can explain why. I do FinOps the unglamorous way that works - rightsizing, reserved instances, spot and autoscaling, per-team attribution. I managed $2M+ in AWS spend and cut $600K a year; on a GPU-heavy Azure setup I knocked about 30% (~$48K/yr) off with spot pools, KEDA scale-to-zero, and OpenCost. You need AI integrated into your product and the demo won't survive real traffic. LLM deployment is an infrastructure problem, and infrastructure is what I do. I deploy self-hosted models with vLLM and Ollama on Kubernetes behind an OpenAI-compatible endpoint, build RAG pipelines with LangChain and Qdrant on your own infrastructure so your documents never leave, route between self-hosted and API models with a LiteLLM gateway, and wire in Langfuse so you can see every request and every token spent. Your team gets a service with monitoring and runbooks - not a notebook. You're migrating to AWS or Azure and need it done without downtime. I handle full cloud migrations with Terraform from line one, security baked in - SOC2 Type II passed first attempt, PCI-DSS automation on a Fortune 500 project. WHAT YOU CAN EXPECT When we work together, I start by understanding your actual environment and what's really causing problems. I don't change things blind - I look at the live system first, then prioritize whatever's burning money or blocking releases. Most projects show improvements in cluster reliability, deployment speed, and cloud cost visibility. Typical outcomes: zero-downtime upgrades on production clusters running 100+ microservices behind 4M daily visitors at 99.95% uptime. CI/CD pipelines that your team trusts enough to ship daily instead of weekly. Cloud spend that gets attributed to teams and rightsized automatically. And on AI work, models that stay up under load with a GPU bill you can actually explain. MY BACKGROUND I started managing Linux servers and moved into Kubernetes and cloud infrastructure over the last 14+ years. I've led the team that stood up EKS for a 500K-user platform and run production clusters on EKS, AKS, and DOKS. RBAC done properly, Helm for everything, ArgoCD GitOps, HPA and VPA tuned to real traffic. For the past year I've been building LLM infrastructure on that same stack: my own RAG platform on Kubernetes (streaming retrieval API, Qdrant, LangChain, delivered through Argo CD and Terraform) and a GitOps-managed LLM platform on AKS with GPU cost controls. I use both as working references for client AI-integration work. I hold CKA, CKS (Kubernetes Security), AWS Solutions Architect, Azure AZ-104 and AZ-500, Red Hat Certified Engineer, and Terraform certifications (CKA/CKS/Terraform held 2020-2023, renewing this year). More importantly, I've applied them to real problems - from Fortune 500 migrations to production LLM serving. RECENT WORK On the FinOps side, I managed $2M+ in AWS spend and cut $600K annually through rightsizing, reserved instances, and spot usage. For a GPU-heavy Azure setup, I designed spot pools with KEDA scale-to-zero and OpenCost dashboards, cutting costs by about 30% (~$48K/yr). For a CI/CD overhaul, I took a client's build-to-deploy from 40 minutes to under 12 minutes and moved them from weekly to daily releases with GitOps and full audit trail. On the AI side, I've built LLM serving with vLLM and Ollama on Kubernetes, RAG pipelines with LangChain and Qdrant with RAGAS quality gates, and full request tracing via Langfuse. NEXT STEPS If you're dealing with Kubernetes instability, slow CI/CD, unexplained cloud costs, or an AI feature that needs to become a production service, describe your situation in a message. I'll tell you straight whether I can help and what the realistic approach would be. I respond within a few hours and overlap US East mornings and EU afternoons.