About Me
Get to know me
Sebastian Tekieli
CTO & Solo Dev with AI Team
I build autonomous AI systems that work while I sleep. My 19 years in tech (including 7 years as CTO scaling a team from 3→26 people at DataFeedWatch) taught me one thing: true scalability isn't bigger infrastructure, it's smarter automation.
As CTO, I focus on building scalable architectures and efficient development teams. My approach combines technical expertise with the ability to strategically plan and manage projects.
In the past, I founded and ran several technology startups, which gave me a unique perspective on product development and technology business management.
DevOps & Cloud Infrastructure
Building scalable and secure cloud solutions
Cloud & Infrastructure
- AWS & GCP
- Kubernetes / GKE / OpenShift
- Terraform & Infrastructure as Code
- CI/CD (Jenkins, GitLab CI)
- Multi-cloud Environments
DevOps Tools
- GitOps Methodologies
- Ansible & Puppet
- Shell Scripting
- Python for Automation
- Large Language Models (LLM)
Security & Compliance
- Security Best Practices
- Compliance (GDPR, ISO 27001)
- Vulnerability Management
- Access Control & IAM
- Security Monitoring
Experience & Expertise
Seasoned DevOps Engineer with over a decade of experience architecting and managing resilient, cloud-agnostic infrastructures for complex sectors such as military, airlines, and banking.
Specializing in Kubernetes, Terraform, and CI/CD automation, focusing on creating scalable, secure solutions from blueprint to production. Leveraging GitOps methodologies to drive efficiency and automation across the development lifecycle.
Led process automation initiatives using Large Language Models (LLMs), streamlining workflows and enabling smarter, more efficient operations.
Certifications
References
See what people I've worked with have to say
Conference Talks & Meetups
Sharing knowledge and experience with the developer community
Hotwire Native - Build Mobile Apps the Rails Way
Ruby Community Conference
A hands-on workshop by Sebastian Tekieli & Alexander Repnikov on building native mobile apps for iOS and Android using Hotwire Native. Participants discovered how to leverage the Rails way of mobile development without leaving their comfort zone, exploring Bridge Components and native integration patterns.
Build Mobile Apps the Rails Way
KRUG #4 2025
A presentation exploring Hotwire Native as a solution for building mobile applications using Ruby on Rails. The talk covers the challenges of mobile development, comparing native, cross-platform, and progressive web apps, and demonstrates how Hotwire Native enables Rails developers to build native mobile apps using their existing web development skills. Key topics include Bridge Components for web-to-native communication and real-world examples from production apps.
My Technologies
I use cutting-edge technologies to create high-quality digital products that meet your requirements.
Programming Languages
Ruby
Elegant object-oriented language ideal for rapid web application development.
JavaScript/TypeScript
Modern languages for creating dynamic web and mobile applications.
PHP
Versatile scripting language used for creating dynamic websites and web applications.
Frameworks
React
JavaScript library for building interactive user interfaces.
Next.js
React framework for creating efficient web applications with SSR and SSG.
Ruby on Rails
Ruby framework for rapid web application development following "convention over configuration".
Frontend
Tailwind CSS
Utility-first CSS framework for rapidly building custom interfaces.
React Native
Framework for creating native mobile applications using React.
Expo
Platform and toolset for React Native, accelerating mobile app development.
Backend
Node.js
JavaScript runtime environment for building scalable backend applications.
Express.js
Minimalist web framework for Node.js to create APIs and server applications.
Ruby on Rails API
API mode in Ruby on Rails for creating efficient and secure backends.
Databases
PostgreSQL
Advanced SQL database management system with JSON support.
MongoDB
Non-relational document database, ideal for applications with dynamic schemas.
Redis
Efficient in-memory database, perfect for caching and session storage.
Transform Your Digital Vision
I create stunning websites and mobile apps that deliver real business results. From simple landing pages to complex e-commerce solutions, I help you stand out in the digital world.
Ready to start your project? Let's talk about how I can help you achieve your digital goals.