~/raj-sol
$ whoami

Hi, I'm

Tom-Robin Raja

Full-Stack Developer & DevOps Engineer

$ |

I build robust, scalable applications and architect cloud infrastructure that powers modern businesses. Specialized in full-stack development, DevOps automation, and cloud-native solutions.

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02. About Me

I'm an independent freelancer specializing in full-stack development and DevOps engineering. With a passion for building high-performance applications and automating infrastructure, I help businesses transform their ideas into scalable, production-ready solutions.

My journey in tech started over 8 years ago, and I've since worked on everything from microservices architectures to CI/CD pipelines, container orchestration, and cloud migrations. I believe in writing clean, maintainable code and building systems that are resilient and efficient.

When I'm not coding, you'll find me exploring new technologies, contributing to open-source projects, or writing technical articles to share knowledge with the community.

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Years Experience
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Projects Completed
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Happy Clients
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Countries Reached
skills.json
1  {
2    "role": "Full-Stack & DevOps",
3    "focus": [
4      "Backend Development",
5      "Cloud Architecture",
6      "CI/CD Automation",
7      "Container Orchestration"
8    ],
9    "approach": "Build, Test, Deploy, Repeat",
10    "availability": true
11  }

03. Technical Arsenal

Backend Development

Node.js / Express
Python / Django / Flask
Go / Gin
GraphQL / REST APIs

Frontend Development

React / Next.js
Vue.js / Nuxt
TypeScript
Tailwind / Styled Components

DevOps & Cloud

Docker / Kubernetes
AWS / Azure / GCP
Jenkins / GitLab CI / GitHub Actions
Terraform / Ansible

Databases & Infrastructure

PostgreSQL / MySQL
MongoDB / Redis
Elasticsearch / Kafka
Nginx / Apache / Load Balancers

Technologies & Tools

Git Linux Bash Prometheus Grafana ELK Stack Microservices WebSockets gRPC RabbitMQ Selenium Jest Pytest Cypress ArgoCD Helm Istio Vault

04. Featured Projects

Featured Project

Cloud-Native E-Commerce Platform

Architected and deployed a highly scalable e-commerce platform using microservices architecture on Kubernetes. Implemented CI/CD pipelines, auto-scaling, and monitoring solutions. Handled 50K+ concurrent users with 99.9% uptime.

  • Node.js
  • React
  • Kubernetes
  • AWS
  • PostgreSQL
  • Redis
  • GitLab CI
DevOps

Automated Infrastructure as Code

Built a complete IaC solution using Terraform and Ansible for multi-cloud deployments. Reduced infrastructure provisioning time from hours to minutes with automated testing and validation.

  • Terraform
  • Ansible
  • AWS
  • Azure
  • Python
  • Jenkins
Full-Stack

Real-Time Analytics Dashboard

Developed a real-time analytics platform for processing and visualizing large datasets. Implemented WebSocket connections, data streaming, and interactive visualizations with sub-second latency.

  • Next.js
  • Python
  • Kafka
  • Elasticsearch
  • D3.js
  • Docker
API Development

GraphQL Gateway Service

Created a unified GraphQL gateway that aggregates multiple REST APIs and microservices. Includes authentication, caching, rate limiting, and comprehensive API documentation.

  • Go
  • GraphQL
  • Redis
  • PostgreSQL
  • Docker
  • Kong

05. Experience & Timeline

2026 - Present

Independent Freelancer

Full-Stack & DevOps Engineer

Working with clients worldwide to build scalable applications and cloud infrastructure. Specializing in microservices architecture, CI/CD automation, and cloud migrations.

  • Led 20+ successful project deployments
  • Reduced infrastructure costs by 40% through optimization
  • Achieved 99.9% uptime across all managed systems
2022 - 2025

DevOps Engineer

University Hospital Cologne

Led the DevOps transformation initiative, implementing Kubernetes clusters, automating deployment pipelines, and establishing infrastructure as code practices.

  • Migrated monolithic applications to microservices
  • Built CI/CD pipelines reducing deployment time by 70%
  • Managed multi-cloud infrastructure across AWS and Azure
2022

Junior Developer

University Hospital Cologne

Started my professional journey building web applications and learning best practices in software development, testing, and deployment.

06. Get In Touch

I'm currently available for freelance projects and consulting opportunities. Whether you need help building a new application, optimizing your infrastructure, or setting up DevOps pipelines, I'd love to hear from you.

Currently accepting new projects

Email
email@rajsol.de
Schedule a Call
Book a meeting
GitHub
@tomraja
LinkedIn
/in/tom-robin-raja