Alexander Paul Wansiedler

📍 Munich, Germany | ✉️ [email protected] | 📱 +49 176 241 64 141 | 🔗 linktree
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München

Senior Full Stack / Web3 Node Engineer

Results-driven Senior Full-Stack/Web3/GitOps Engineer with over 20 years of experience in software engineering, DevOps, and system architecture across industries including digital media, finance, and IoT.
Specializing in:

  • Rust/Solidity for Solana and Ethereum smart contracts
  • TypeScript for Node/Deno backends and modern frontends (React, Vue, Angular)
  • Python for FastAPI/Django-based backends
  • DevOps and Infrastructure-as-Code (IaC)

Skilled in designing robust, scalable architectures and CI/CD pipelines with a strong Agile/Kanban focus, big data, and zero-party data solutions.
Experienced mentor in TypeScript, Python, and Rust, backend architecture, and Agile/SOLID principles.

🚀 Node.js Experience

Since 2009, I’ve actively worked with Node.js, starting from its earliest versions, when the ecosystem was still in its infancy. My passion for the platform began with its simplicity and asynchronous nature, which made it ideal for building high-performance, scalable applications.

Over the years, I’ve grown with Node.js through its major phases — from callbacks and events, to Promises, and eventually async/await.
In early projects, I utilized Express.js, integrating databases like MongoDB and PostgreSQL, honing deep expertise in async programming, error handling, and stream-based processing.

As the ecosystem matured, I embraced modern frameworks and tooling:

  • Adopted Express.js, Next.js and NestJS for more structured backend applications
  • Designed resilient microservices with Fastify and Prisma
  • Architected systems using GraphQL (Apollo, Mercurius), gRPC, and WebSockets (Socket.IO, uWebSockets.js)
  • Leveraged tools like BullMQ, Bree, and Agenda for job queues
  • Integrated DevOps workflows using Docker, Kubernetes, GitLab CI/CD, ArgoCD, and OpenTelemetry
  • Built full-fledged frontends using React/Next.js, Vue/Nuxt.js, Angular, and UI systems like Tailwind, MUI, and ShadCN

Currently, I continue to use Node.js extensively to build high-load APIs, distributed systems, and developer tooling — applying best practices such as SOLID, KISS, and YAGNI in every implementation.

📌 Selected Experience

Senior Node.js Engineer

Ippen Digital Media GmbH, Remote 🇩🇪 — 2021–2025

  • Architected high-availability APIs serving millions of requests daily using Fastify and PostgreSQL.
  • Designed and implemented complex data pipelines (Kafka + Node.js workers).
  • Introduced typed backend with full TypeScript migration.
  • Automated deployments via GitLab CI and Kubernetes.
  • Led mentoring programs and performed architectural reviews.

Lead Fullstack Node.js Developer

Lexx Software Co. Ltd., Cyprus — 2015–2021

  • Built full B2B SaaS platform with Express and Vue/Nuxt frontend.
  • Scaled services using Docker and AWS Lambda (Node.js runtime).
  • Integrated Elasticsearch, Redis, and MongoDB for high-speed querying and caching.
  • Designed RBAC and authentication layers using JWT and OAuth2.

Backend Engineer (Node.js)

Intaro, Russia 🇷🇺 — 2004–2015

  • Migrated legacy PHP/Java systems to Node.js microservices.
  • Created APIs for IoT devices using MQTT + Node.js backend.
  • Implemented real-time data dashboards using Socket.io and MongoDB.
  • Established team-wide code standards and CI workflows.

🛡️ Certifications

  • OpenJS Node.js Application Developer (JSNAD)
  • OpenJS Node.js Services Developer (JSNSD)
  • Certified Kubernetes Administrator (CKA)
  • Certified Kubernetes Application Developer (CKAD)
  • PCPP1™ – Certified Professional in Python Programming (bonus points 😉)

🌐 Languages

  • German (native)
  • English (C1-C2)

💡 Highlights

  • Node.js since v0.8 – built CLI tools before it was cool
  • TypeScript early adopter — no any in my kingdom
  • Deep love for clean architecture, SOLID principles, and automation
  • Experienced in leading teams and mentoring developers
  • Obsessed with performance tuning and observability

🧰 Core Tech Stack

  • Languages: JavaScript, TypeScript, Node.js (ESM/CJS), Bash
  • Frameworks: Express, Fastify, NestJS, Koa, Hapi
  • Frontend: React, Next.js, Vue/Nuxt (Fullstack when needed)
  • Databases: PostgreSQL, MongoDB, Redis, SQLite, ClickHouse
  • DevOps: Docker, Kubernetes, GitLab CI/CD, AWS CDK, Terraform
  • Monitoring: Prometheus, Grafana, Loki, OpenTelemetry, Jaeger
  • Testing: Jest, Vitest, Supertest, Cypress, Playwright
  • Messaging: Kafka, RabbitMQ, WebSockets
  • Security: OAuth2, JWT, Passport.js, OWASP practices

Frontend:

  • React, Next.js, Vue.js/Nuxt.js, Angular
  • UI: Tailwind, MUI, Chakra UI, ShadCN
  • Testing: Jest, Playwright, Cypress, Storybook

DevOps / Infra:

  • Docker, Kubernetes, OpenStack, Ceph
  • CI/CD: GitLab CI/CD, GitHub Actions, Jenkins
  • GitOps: ArgoCD, Flux
  • IaC: AWS CDK, Terraform, Crossplane, Ansible
  • Monitoring: Prometheus, Grafana, OpenTelemetry, Loki, ELK

Security & Auth:

  • JWT, OAuth2, OpenID Connect
  • WebAuthn (Passkeys), SAML, LDAP

📚 Education

MSc in Computer Science
MEPhI (Moscow Engineering Physics Institute), Moscow | 09.2003 – 11.2009
Specialization: Electronics, Automation, Unix Systems

//: # (Moscow State Linguistic University 09.2012 – 11.2016)

💬 Motto

“If it runs in Node, I can scale it.”