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I design, secure, and operate production-grade Kubernetes and cloud platforms used by real companies at scale, with a strong focus on security, reliability, and automation. With 12+ years of hands-on experience, I help companies build secure, scalable, and observable infrastructure across both cloud and bare-metal environments. My expertise is not based only on certifications, but on real enterprise experience operating critical systems under real production pressure. I have worked as a Senior SRE / Platform Engineer at companies such as Thryve, Getir, HelloFresh, Westwing, and Sony, where I was responsible for Kubernetes platforms, cloud architecture, CI/CD, observability, and security hardening. What I bring to your project is not “DevOps scripting”, but true production-grade platform engineering and the best practices used in large-scale enterprise environments. Most clients come to me after their Kubernetes or cloud setup becomes unmanageable, insecure, or overly complex. I help turn those environments into clean, secure, and maintainable platforms. ⸻ Core Expertise • Kubernetes cluster design, hardening, and operations (CKA / CKS level) • Multi-cloud architecture across AWS, GCP, Open Telekom Cloud, OpenStack, and hybrid environments • AWS cloud architecture (networking, IAM, security, cost optimization) • GitOps with ArgoCD / Flux, CI/CD pipelines, and automation • Infrastructure as Code with Terraform, Ansible, CloudFormation, and CDK • Observability stacks: Prometheus, Loki, Tempo, OpenTelemetry • Container and image security: Trivy, Cosign, SBOM, distroless images • Network Policies, Pod Security Admission, runtime security, zero-trust concepts • Running stateful workloads (databases, HAProxy, storage) inside Kubernetes • Bare-metal and hybrid Kubernetes environments I also have a programming background in Go, Python, and PHP, which helps me understand application needs deeply and design infrastructure that truly fits the workload. ⸻ Certifications • AWS Certified Solutions Architect • CKA – Certified Kubernetes Administrator • CKS – Certified Kubernetes Security Specialist

⭐️ 8+ Years in Software Engineering (Golang, Python) ⭐️ Hands-on LLM/ChatGPT/RAG product development and large-scale ML hosting on AWS ECS/CDK ⭐️ Backend for global platforms serving 3M+ users/day ⭐️ CKAD, AWS Solutions Architect – Associate & AWS DevOps Engineer – Professional certified ⭐️ Strong background in microservices, cloud-native systems & real-time data pipelines ⭐️ Slack-JIRA AI assistant, Foodpanda homescreen infra, Amazon PDP localization pipeline ⭐️ High-impact Upwork client results with consistent 5.0 ratings 🧑‍💻 Back-End Engineering (Golang, Python) ☑️ REST, gRPC, GraphQL API design ☑️ Go frameworks: Gin, Echo, Revel, Martini, Gorilla ☑️ ORM: Gorm, go-pg | Testing: GoMega, Ginkgo, go-mock ☑️ Concurrency: goroutines, channels, worker pools ☑️ Dependency Injection: go-wire ☑️ Structured logging: zap, zerolog, logrus ☑️ GolangCI-lint contributor – deep attention to clean code and linting 🧑‍💻 Cloud & Infrastructure ☑️ AWS: Lambda, ECS, RDS, DynamoDB, S3, API Gateway, Secrets Manager, CDK ☑️ GCP: Cloud Run (standalone & GKE), Firestore, Pub/Sub ☑️ Infrastructure as Code: Terraform, Ansible ☑️ Docker, Kubernetes (CKAD), Helm ☑️ CI/CD: GitHub Actions, Jenkins, Bitbucket Pipelines 🧑‍💻 Databases & Caching ☑️ PostgreSQL, MySQL, MongoDB, DynamoDB, Firestore ☑️ Redis, Memcached, Key-vault ☑️ Neo4j (graph db), Elasticsearch (search & analytics) 🧑‍💻 DevOps, Observability, Streaming ☑️ RabbitMQ, Apache Kafka, Apache Schema Registry ☑️ Prometheus, Grafana, Datadog, AWS CloudWatch ☑️ Log pipelines: ELK (Elasticsearch, Logstash, Kibana), Filebeat 🛠 Blockchain & Decentralized Systems ☑️ Ethereum, Web3 API, ERC-20 Token Transfers ☑️ Cowswap DEX integration ☑️ Katzenpost Mixnet-based Ethereum transaction privacy router ☑️ Secure wallet interaction, order book access, token tracking 🧑‍💻 AI / GenAI / LLM Work ☑️ LangChain, ChatGPT, Retrieval-Augmented Generation (RAG) ☑️ Slack-JIRA LLM assistant (LangChain + Python + ChromaDB) ☑️ TruthWatch: Real-time YouTube AI content audit web app ☑️ Amazon-scale LLM hosting & PDP localization pipeline ☑️ Prompt engineering, LLM pipelines, context chaining

Need a backend that doesn't break when you scale? I'm a Principal Engineer and Ex-CTO who's built systems handling 25K requests/second for fintech platforms with 1M+ users. Raised $1M for my own startup. I know what it takes to ship fast without cutting corners. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 𝗪𝗵𝗮𝘁 𝗜 𝗯𝘂𝗶𝗹𝗱: → APIs & backends in Go, Python, and TypeScript → SaaS platforms from MVP to production scale → AI integrations & LLM-powered features (RAG, agents, OpenAI/Anthropic) → Cloud infrastructure on AWS & Kubernetes → Integrations (Stripe, Shopify, third-party APIs) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 𝗥𝗲𝗰𝗲𝗻𝘁 𝗿𝗲𝘀𝘂𝗹𝘁𝘀: → $4K Shopify product sync delivered in 2 days → Call tracking SaaS full backend in 5 days → 30% infra cost reduction | 55% faster API latency → 1200+ GitHub stars on open-source tools ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ I write code that's simple, tested, and maintainable. Not clever puzzles for the next developer. ✉ Send your requirements. I respond in minutes.

My expertise lies in HTML, CSS, and JavaScript, along with a strong understanding of TypeScript. I am proficient in using popular UI libraries like Material UI and Chakra UI to create visually appealing and user-friendly interfaces. 🔭 When it comes to building robust web applications, I have extensive experience with React, Node.js, and Express.js. I am adept at leveraging the power of React to develop scalable and dynamic user interfaces. Additionally, I have a solid understanding of server-side development using Node.js and Express.js, allowing me to build efficient and reliable backend systems. 🌱 I also have hands-on experience with modern software development practices such as Docker, Kubernetes, and CI/CD (Continuous Integration/Continuous Deployment). I can containerize applications using Docker, orchestrate them with Kubernetes, and set up automated deployment pipelines for efficient software delivery. ⚡ In terms of cloud computing, I have a strong command over AWS (Amazon Web Services). I am proficient in deploying applications on AWS and utilizing various services offered by AWS, ensuring high availability, scalability, and security. With a strong background in web development and a keen eye for detail, I strive to deliver top-notch solutions that meet the needs of both users and stakeholders. I am constantly learning and staying up-to-date with the latest trends and technologies in the field, allowing me to deliver cutting-edge applications that provide exceptional user experiences. If you're looking for a dedicated and skilled developer to bring your ideas to life, feel free to reach out. I'm excited to collaborate and contribute to your projects.

I help businesses eliminate deployment bottlenecks, improve system reliability, and build cloud infrastructure that scales without increasing operational complexity. I'm a Senior DevOps & Cloud Engineer with 7+ years of experience delivering production-grade infrastructure for startups and growing businesses across Amazon Web Services (AWS), Azure, GCP, and hybrid cloud environments. CKAD-certified with deep expertise in Kubernetes, Docker, CI/CD automation, deployment automation, Linux administration, and cloud-native technologies. I've completed 200+ cloud and DevOps engagements, helping teams automate deployments, optimize AWS infrastructure, modernize Kubernetes environments, and build scalable platforms that support business growth. From Amazon EC2 and Amazon S3 to Kubernetes clusters, Terraform deployments, and CI/CD pipelines, I focus on creating secure, reliable, and high-performing infrastructure that allows teams to ship faster and operate with confidence. → Free infrastructure audit included with every engagement. Message me first if you want a no-obligation technical review of your current AWS, Kubernetes, Docker, Terraform, or CI/CD environment. ────────────────────────────────────────── 🛠️ Problems I Solve ✔️ Manual deployments are causing delays and failed releases. I build CI/CD pipelines using GitHub Actions, GitLab CI/CD, Jenkins, Git, and deployment automation best practices. ✔️ Infrastructure that struggles to scale. I design and deploy auto-scaling, high-availability architectures across AWS, Azure, and GCP using Kubernetes, Docker, Terraform, and Infrastructure as Code. ✔️ Rising cloud costs with little visibility. I optimize AWS environments through right-sizing, architecture improvements, resource audits, and cost-control strategies. ✔️ Limited production visibility. I implement observability solutions using Prometheus, Grafana, ELK, CloudWatch, and centralized monitoring platforms. ✔️ Kubernetes complexity is slowing development teams. I manage EKS, AKS, GKE, and bare-metal Kubernetes clusters with Helm, ArgoCD, GitOps workflows, and production-ready deployment automation. ✔️ Security and compliance concerns. I harden Linux environments, integrate DevSecOps tooling, and implement security best practices from day one. ────────────────────────────────────────── ☁️ Cloud Infrastructure & DevOps ✔️ Amazon Web Services (AWS): Amazon EC2, Amazon S3, RDS, VPC, EKS, CloudFormation, Lambda, IAM, CloudWatch ✔️ Azure (VMs, AKS, Azure DevOps, Azure Monitor) ✔️ GCP (GKE, Cloud Run, Cloud Monitoring) ✔️ Hetzner, DigitalOcean, Oracle Cloud, OpenStack ✔️ Infrastructure as Code: Terraform, Ansible, CloudFormation ✔️ Linux (Ubuntu, CentOS, Debian, Amazon Linux ✔️ Networking: VPCs, Load Balancers, DNS, VPNs, Security Groups ✔️ Git workflows, deployment automation, and infrastructure lifecycle management ────────────────────────────────────────── 🚀 Kubernetes & Containerization ✔️ Amazon EKS · Azure AKS · Google GKE · k3s ✔️ Docker containerization and Kubernetes orchestration ✔️ Helm · ArgoCD · GitOps workflows ✔️ Blue-Green & Canary deployments ✔️ Auto-scaling · High Availability architecture ✔️ Ingress: NGINX, Traefik · Service Mesh: Istio ✔️ API Gateways: AWS API GW · Azure APIM · GCP API GW ────────────────────────────────────────── ⚙️ CI/CD & Automation ✔️ GitHub Actions · GitLab CI/CD · Jenkins · ArgoCD ✔️ Git workflows, branching strategies, and release automation ✔️ Deployment Automation for Kubernetes and cloud infrastructure ✔️ Automated testing integration (Pytest, JUnit, Playwright) ✔️ Python scripting for automation and operational tasks ✔️ Load testing: Apache JMeter · API testing: Postman ✔️ Infrastructure deployment pipelines ────────────────────────────────────────── 🔒 DevSecOps & Security ✔️ HashiCorp Vault · Trivy · Snyk · SonarQube ✔️ GitGuardian · TruffleHog · KICS ✔️ OWASP best practices · Security-first infrastructure design ✔️ Linux security hardening and vulnerability management ────────────────────────────────────────── 📊 Monitoring & Observability ✔️ Prometheus · Grafana · ELK Stack (Elasticsearch, Logstash, Kibana) ✔️ AWS CloudWatch · Azure Monitor ✔️ Alerting, incident management, and on-call runbooks ────────────────────────────────────────── 💡 Why Clients Choose Me ✔️ Strong AWS, Kubernetes, Docker, Linux, Terraform, and CI/CD expertise ✔️ Multi-cloud experience across AWS, Azure, and GCP ✔️ Focus on long-term reliability, scalability, and maintainability ✔️ Clear communication and dependable project delivery 📩 Ready to build infrastructure that scales with your business? Send me a message with your requirements. I'll review your current environment, identify opportunities for improvement, and provide actionable recommendations to help you deploy faster, scale confidently, and operate more reliably.

✅ Worked with Audi, T-Systems, Rackspace, delivering 6-figure automation savings 🇩🇪 German work quality. Extreme reliability. Never over budget. 🛒 E-Commerce Specialist: Automating Bookkeeping, Product Data & Merchandising. 🗣 Exceptional pro-active communication. <15min response times. Always done on time. 🤝 100% satisfaction guarantee. Full payment only when you’re fully happy. — 📞 I strive to be earnestly helpful in every interaction. It starts with a complimentary video consultation call. Invite me to your project to book yours. — Hey! I’m Nando! I help E-Commerce founders escape the "operational grind" by building robust, intelligent automations. Running a shop involves thousands of repetitive tasks—from matching invoices to updating product descriptions. My job is to take those tasks off your plate permanently so you can focus on growing your brand. I bring a unique blend of extreme technical proficiency (Software Engineering background) and clear, proactive communication. I take full responsibility for the solution, and I make it easy and enjoyable to work together. 🏭 E-Commerce Automation: What I Can Build For You I specialize in connecting your shop systems with your back-office tools. Here are three examples of automations I have recently deployed for clients: 1. Automated Bookkeeping & Invoice Mapping The Problem: An E-Com founder was wasting hours manually matching PDF invoices to transactions. The Solution: I built an automation that ingests PDFs via Google Drive, uses AI to analyze the data, and maps them to the correct payment record in Sevdesk. The Result: The founder skipped weekly bookkeeping entirely, saving 5+ hours a week. 2. AI-Powered Merchandising (Image Selection) The Problem: A furniture shop needed to highlight the best images for thousands of SKUs but doing it manually was impossible. The Solution: I built an image analyzer that scans product photos, compares them against a "proofed" high-quality example, and automatically selects and highlights the best image in the shop gallery. The Result: A better-looking storefront with zero manual effort. 3. Product Description Integrity (Quality Control) The Problem: A shop’s product descriptions were constantly out of sync with manufacturer updates, leading to tedious manual proofreading. The Solution: I built a scraper that pulls text from manufacturer sites, compares it to the live shop text, and alerts the owner only when inconsistencies are found. The Result: 100% accurate product data without the manual headache. 🛠 The Tools & Integrations I don't just "patch" things together; I build integrated systems. I can connect virtually any E-Commerce platform with any back-office tool. 🛒 Shop Systems: Shopify, Magento, WooCommerce, BigCommerce (Product uploads, inventory syncing, order management). 💰 Bookkeeping & Finance: Sevdesk, Lexware, Bookkeepingbutler (Invoice automation, payment mapping, receipt processing). ⚙️ The Automation & AI Engine: OpenAI (ChatGPT/Vision), Claude, Python, n8n, Make.com. Custom Scripts: Bash, JavaScript, Golang, Python. 🗣 What Clients Say ❝ Nando is without a doubt one of the brightest developers that I have seen. He not only is able to quickly learn a new technology but can then quickly implement it in a scaled solution. He has this deep curiosity about everything he works with that is infectious to those around him. ❞ — Justin Kaseman - Blockchain Engineer - Chainlink Labs ❝ Nando is one of those rare "unicorns" who is able to learn anything in an extremely short period of time... In addition to his learning abilities, his interpersonal skills, communication and work ethic are also one of a kind. ❞ — Csaba Balogh - Full Stack Developer - MERN 📞 Ready to automate your shop? It starts with a complimentary video consultation call. Invite me to your project on Upwork or send me a direct message to book yours. Nando Theesen E-Commerce Automation Specialist