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Most backends look fine in a demo and fall apart the moment real traffic hits. I build the ones that hold up. Over the last 5+ years I've shipped production systems that process 100M+ records a month, power SaaS products thousands of people use daily, and keep running when load spikes instead of paging someone at 2am. If you're a startup or SaaS team, the problem usually isn't writing code. It's that the system got built fast to ship an MVP, and now it's slow, fragile, or hard to extend without something else breaking. The work I'm best at is taking a system from "it works for now" to "it scales and we trust it." TECH STACK & SKILLS Backend: Node.js, Express.js, NestJS, TypeScript APIs & Architecture: REST APIs, Microservices, Multi-Tenant SaaS Real-Time: WebSockets, SocketIO Databases: PostgreSQL, MSSQL, MongoDB, query optimization Queues & Background Jobs: Redis, BullMQ, event-driven processing Frontend / Full-Stack: React, Next.js DevOps & Cloud: Docker, Kubernetes, AWS WHAT I CAN HELP WITH - Building a new product or MVP from scratch - Designing scalable REST APIs and microservices - Real-time apps that stay in sync under load - Multi-tenant SaaS platforms - Database design and performance tuning - Queue systems, background workers, and reporting pipelines - Optimizing or rescuing an existing system that has outgrown its setup RECENT WORK - A real-time machine monitoring and analytics platform handling 100M+ records per month - Event-driven pipelines built with Redis, BullMQ, and WebSockets - Production SaaS applications serving thousands of active users - Reporting systems and background workers for enterprise clients running business-critical data I write maintainable, production-ready code with a clear paper trail, not quick fixes that become next quarter's emergency. I'm a strong fit if you want someone who owns the technical side and thinks a step ahead. Probably not your person for a one-off $20 script tweak. If this sounds like your situation, send me a short note about what you're building and where it's stuck. I'll tell you honestly whether I'm the right fit and how I'd approach it.

I am a Cloud & DevOps Engineer with 5+ years of experience in building and managing scalable, secure, and automated infrastructures across AWS, GCP, Azure, and Proxmox. My expertise lies in container orchestration, CI/CD automation, cloud-native development, and infrastructure-as-code, helping organizations achieve faster delivery and improved reliability.

Are you facing slow software releases, rising cloud costs, or unreliable infrastructure? As a certified DevOps Engineer and AWS Solutions Architect with over five years of experience, I design scalable and secure cloud solutions that accelerate deployments by up to 50% and reduce operational expenses. I specialize in CI/CD pipelines, Kubernetes orchestration, and infrastructure as code, helping startups and enterprises achieve faster time-to-market and improved reliability. Whether you are migrating legacy systems, automating workflows, or implementing DevSecOps, I ensure seamless integration and minimal downtime. I have delivered projects across industries such as fintech and e-commerce, achieving results like 30% cost reductions and 99.99% uptime. Why Work With Me as Your DevOps Engineer and Solutions Architect? - Proven Track Record: Completed over 50 successful Upwork projects with 5-star ratings, including AWS migrations that reduced infrastructure costs by 40% for a SaaS client. - Client-Centric Approach: I begin with a free consultation to understand your specific challenges, then develop tailored solutions aligned with your business goals, such as optimizing AWS EC2 instances, setting up Azure DevOps pipelines, or deploying GCP Kubernetes Engine. - End-to-End Services: From archi- End-to-End Services: I manage everything from architecture design to ongoing maintenance, allowing you to focus on growth.d Architecture: - Cloud Platforms: AWS Certified Solutions Architect (Professional & Associate), Azure Solutions Architect Expert, Google Cloud Professional Architect. Proficient in multi-cloud setups for hybrid environments. - CI/CD and Automation: Build robust pipelines with Jenkins, GitHub Actions, GitLab CI/CD, CircleCI, and ArgoCD. Automate deployments to reduce release times from days to hours. - Containerization and Orchestration: Use Docker for containerization, Kubernetes (EKS, AKS, GKE) for orchestration, and Helm for package management to ensure scalable and resilient microservices architectures. - Infrastructure as Code: Use Terraform, AWS CloudFormation, Ansible, and Pulumi to provision and manage infrastructure in a reproducible and secure manner. - Monitoring & Logging: Integrate Prometheus, Grafana, ELK Stack, and New Relic for real-time insights, alerting, and performance optimization. best practices with AWS IAM, Azure AD, Vault for secrets management, SonarQube for code quality, and compliance with GDPR, HIPAA, and other regulations; Database and Networking: Optimise RDS, DynamoDB, and Aurora; configure VPCs, load balancers, and CDN for high availability.ty setups. - Serverless- Serverless and Edge Computing: Use AWS Lambda, Azure Functions, and API Gateway to build cost-effective, auto-scaling applications—methodologies: Scrum and Kanban integration to align DevOps with your development teams. Key Achievements & Case Studies: For a fintech startup: Architected a Kubernetes-based microservices platform on AWS, resulting in 60% faster scaling during peak loads and a 25% drop in monthly bills through auto-scaling and spot instances. Enterprise Migration: Led an Azure DevOps implementation for a manufacturing firm, automating CI/CD for over 20 applications, reducing deployment errors by 90%, and enabling blue-green deployments. ents. Cost Optimization: Redesigned GCP infrastructure for an e-commerce client using Terraform, achieving 35% savings by rightsizing resources and implementing reserved instances. Security Overhaul: Integrated DevSecOps for a healthcare application, scanning for vulnerabilities with Snyk and ensuring PCI-DSS compliance to prevent potential breaches.s. Performance Boost: Implemented Datadog monitoring for a media company, identified bottlenecks, and improved application response times by 40%. I stay current with industry trends and hold certifications such as AWS Certified DevOps Engineer - Professional, CKAD, and Terraform Associate. My approach emphasizes collaboration, and I use tools like Slack, Jira, and Confluence to keep you informed throughout the process. Skills Summary DevOps Engineer, Solutions Architect, AWS DevOps, Azure DevOps, GCP DevOps, CI/CD Pipelines, Kubernetes Expert, Docker Specialist, Terraform IaC, Ansible Automation, Jenkins CI, GitHub Actions, Prometheus Monitoring, ELK Stack Logging, DevSecOps Implementation, Cloud Migration, Infrastructure Optimization, Serverless Architecture, Microservices Design, Agile. Ready to enhance your infrastructure? Let’s discuss how I can tailor a DevOps strategy to your needs. Message me for a free 30-minute audit of your current setup. Together, we will build efficient, scalable systems to support your success. success!

Fractional CTO and AI engineer. I help funded startups make the technical decisions they can't afford to get wrong, and I build the products behind them: architecture, AI systems, and full-stack development at production level. 12+ years building and shipping. Here is how a recent engagement started. A company was running a large operation on a single spreadsheet, and every quote took hours. The deal was not closed yet, but I saw the problem and could not stop myself from sketching the fix. I brought the prototype to the next meeting and left with a contract. I shipped the first version in four weeks, and quoting that took hours now takes seconds. The project wrapped successfully, and the platform runs their daily operations today. That is how I work. I am a product person first, an engineer second. Before I reach for a technology, I want to understand what is actually broken and what it is costing you. Knowing what to build is the hard part. The building is easy. A note on my Upwork history: my reviews here date to 2021 because I stepped away from the platform to build. In those years I grew my own company past 100,000 members and became Director of Engineering at Toptal. I am back to take on a small number of clients at the level I now operate. What I bring: - Technical leadership: architecture decisions, roadmap, build-vs-buy calls, and hiring. I spent four years as a technical screener at Toptal, running more than 2,500 interviews deciding who makes it into the top 3%. Today I am Director of Engineering there. - AI products that actually ship: RAG systems, AI agents, and LLM applications taken from demo to production. I have built AI tools that turned hours of skilled manual work into under a minute, and models that run entirely on the user's device at zero server cost. - Founder-level judgment: I started my own company in 2017 with nothing and still run it nine years later. I know what actually costs a business, because I have paid those costs myself. - Full-stack execution: I am not married to a stack. I choose what the problem demands. In practice that is mostly TypeScript, Node.js, React, and Next.js on the product side, Python and FastAPI on the AI side, and PostgreSQL and AWS underneath. I do not hand you a strategy deck and leave. I build. I work with a small number of clients at a time, so the work is genuinely hands-on. If you are making a foundational technical decision, building an AI product that has to hold up in production, or you need a senior technical partner rather than another pair of hands, book a consultation and bring me the problem. You will leave with a clear answer either way.

PHP and Laravel Developer with DevOps expertise, focused on building scalable, secure, and high-performance web applications. Skilled in REST APIs, Docker, Kubernetes, and CI/CD, with hands-on experience in cloud deployment, automation, and system optimization. Committed to delivering reliable solutions, improving efficiency, and continuously enhancing technical skills in a professional environment.

Your RAG bot invents answers. Your AI agent works in the demo and dies in production. Your HIPAA audit is six weeks out. That's my work: production RAG, LLM agents and automation, shipped with proof across 20+ production systems. A client put it this way on Upwork: "We needed a true Claude Code expert, and Zahidul exceeded every expectation." Another: "He successfully improved the accuracy, performance, and overall functionality of our RAG bot." I run Claude and Codex as an engineering harness. Plenty of people say "AI-assisted" and mean they pasted something into ChatGPT. I architect the system first, the models write into that architecture under my review, then I write the tests and run the scanners and fix what they find before you see any of it. Every decision is mine and I can defend it on a call. YOUR RAG BOT MAKES THINGS UP Grounding gates that refuse to answer when the source doesn't support it, retrieval evaluation, hallucination detection, chunking and context-window budgeting, token cost control. Proof: Yuktha Wellness, a live health chatbot across 6 conditions in 4 Indian languages, where the safety rules live in code and not in a prompt. YOU CANNOT AFFORD A COMPLIANCE FAILURE FHIR R4, HIPAA and GDPR controls built into the architecture, then checked by automated scans instead of a promise. Proof: my last audit scored 93 percent across 60 checks with zero critical failures and 16 of 16 FHIR R4 checks passing. On SOC 2 I'll be straight with you: I architect against the controls and scan for them, I haven't sat a Type II audit with a CPA firm. IT WORKS AND BREAKS UNDER LOAD Multi-provider routing across Claude, Gemini and GPT-4 with a circuit breaker, zero-trust auth, PII scrubbing, and observability through Prometheus, Grafana and Loki so you can see it fail before your users do. Proof: RAG Production Stack, 23 containerized services on one 8GB machine, 3-network isolation, 6 compliance scanners. YOUR AUTOMATION NEEDS BABYSITTING End-to-end workflows in n8n, LangChain and the Claude API that keep running when nobody's watching. Competitor monitoring, lead scoring, content generation, incident routing, SMS and WhatsApp follow-up. Proof: Fine Touch Marketing, an ongoing paid engagement automating SEO across 15-20 med-spa sites. YOUR SITE NEEDS REAL ENGINEERING, NOT A PAGE BUILDER Custom PHP plugins from scratch, headless WordPress and React, Shopify Plus work, and ADA/WCAG 2.1 AA remediation that survives the next update. Proof: Groza Learning Center in LA, 100+ ADA errors fixed with zero theme modifications. Before any of this I spent four years as a Physiotherapy Technologist in clinical care. I've watched a system fail a real patient. That's why I won't ship a healthcare feature without an audit log, and why I'd rather tell you a deadline slipped than hand you something I haven't verified. STACK AI: LightRAG, hybrid vector search with Pinecone, BM25, cross-encoder reranking, multilingual embeddings, LangChain, n8n, Claude, Gemini, GPT-4, agentic and tool-use workflows. Web: React 18/19, Next.js, Node.js, Python FastAPI, TypeScript, Supabase, PostgreSQL with RLS and pgcrypto, Stripe, Capacitor. Cloud: AWS, GCP, Azure, Kubernetes on EKS and AKS, Terraform, Docker, GitHub Actions. CMS: PHP 8.1 OOP with PSR-4, WPGraphQL, WooCommerce, Shopify Plus, Hydrogen, Shopify Functions in Rust and WASM, Remix on Cloudflare Workers, Contentful, Strapi, ACF. ALSO BUILT MediConnect V3: tri-cloud telemedicine, 7 microservices, FHIR R4, 687 test assertions, roughly 2 dollars a month at idle against about 300 conventionally, across 414 Terraform resources. Secure Hybrid AI Hub: sandboxed agent orchestration, untrusted-content labeling, SSRF and prompt-injection defense, evidence-gated completion. EquipCert AI: OSHA inspection SaaS, multi-model AI, offline-first, GPS evidence, Stripe billing. RegenAI: Shopify Plus, Hydrogen, Rust and WASM Functions, compliance-as-code CI. HOW I WORK I don't go quiet. If something's blocked or my estimate was wrong, you hear it early, while there's still time to fix it. You get full source code ownership, documentation, and an architecture the next engineer can pick up without calling me. A small WordPress fix gets the same standard as a HealthTech build. Send me the messy version of your problem, even if the spec isn't finished. I'll tell you what I'd build, what I wouldn't, and what it'll actually take. If I'm the wrong person for it, I'll say so. ETHICAL BOUNDARIES I do not accept projects involving interest-based finance (Riba), conventional insurance, gambling, adult content, or any Haram activity.