Norbert S.
Technical training & open-source work
Experience
Technical training & open-source work
Train and achieve official certification as Certified Kubernetes Application Developer.
Contribute to open-source development and documentation in a personal project.
Stay updated on cloud-native and AI technologies through courses and books.
Technologies:** Kubernetes, Docker, TypeScript, Node.js
Senior Software Engineer
Hive Technologies GmbH
Implement, improve and scale integrations for various ERPs and shop systems (Shopify, Xentral, etc.).
Refactor and scale background workers (Sidekiq) for higher throughput and better error resilience.
Design abstract shop integration for better maintainability and easier addition of future integrations.
Improve observability with structured and centralized logging (AWS CloudWatch Logs).
Technologies:** Ruby, Rails, Postgres, Sidekiq, AWS, Docker, GitHub Actions, Terraform, Grafana
Senior Software Engineer
Good Hood GmbH (nebenan.de)
Develop back-office tools to integrate with partners and the core platform.
Build interactive map (React, Mapbox) with live display of local partner businesses.
Migrate tech stacks from Heroku to AWS.
Integrate headless CMS for marketing campaigns (Contentful).
Support project manager with technical project planning.
Technologies:** Ruby, Rails, JavaScript, React, Postgres, Heroku, AWS, Contentful, Ansible
Lead Developer
MeinWunschcatering GmbH
Complete migration of the infrastructure to a new AWS stack.
Set up automated build pipeline to ensure smooth and easy releasing for developers.
Rewrite partner backend from scratch, adding critical features.
Reduce significant technical debt throughout the app to boost team velocity.
Technologies:** Ruby, Rails, JavaScript, Node.js, Vue.js, Postgres, AWS, Docker, Kubernetes
Lead Developer
Zinsbaustein GmbH
Provide full-stack maintenance and feature development for a Rails-based monolith.
Refactor in preparation for a more scalable and maintainable distributed architecture.
Support product manager with technical planning (user stories, roadmaps).
Set up build pipeline with CircleCI, including continuous deploys.
Screen, interview, and evaluate new candidates.
Technologies:** Ruby, Rails, JavaScript, AWS, Postgres
Lead Developer
Zinsbaustein GmbH
Provide full-stack maintenance and feature development for a Rails-based monolith.
Refactor in preparation for a more scalable and maintainable distributed architecture.
Support product manager with technical planning (user stories, roadmaps).
Set up build pipeline with CircleCI, including continuous deploys.
Screen, interview, and evaluate new candidates.
Technologies:** Ruby, Rails, JavaScript, AWS, Postgres
Senior Software Engineer
Sennheiser
Conduct technical integration and relaunch of the global site with a new responsive design.
Migrate site search functionality from Solr to Elasticsearch.
Continuously extend, improve, and refactor the customized multi-site CMS solution.
Consult with the dev team on improving code maintainability and development practices.
Support project manager in process improvements and technical planning.
Technologies:** Ruby, Rails, Elasticsearch, CMS
Senior Software Engineer
HERE, a Nokia business
Prototype and improve location services in collaboration with mobile app developers and designers.
Profile, optimize, and scale the globally distributed Node.js-based backend.
Design and implement several REST APIs as well as an Angular.js-based admin interface.
Technologies:** Node.js, REST APIs, Angular.js
Senior Software Engineer
Trademob GmbH
Continuously develop, optimize, and scale the Node.js-based bidding system receiving 1.5 billion requests per day (50k requests/second at peak).
Develop and maintain various downstream services for data processing and matching (Node.js, Ruby, Cassandra, Redis).
Integrate the Rails-based campaign management dashboard.
Manage configuration with Chef and build automation with Jenkins.
Leverage AWS cloud infrastructure (EC2, S3, ElastiCache, etc.).
Technologies:** Node.js, Ruby, AWS, Chef, Jenkins
Senior Software Engineer
Trademob GmbH
Continuously develop, optimize, and scale the Node.js-based bidding system receiving 1.5 billion requests per day (50k requests/second at peak).
Develop and maintain various downstream services for data processing and matching (Node.js, Ruby, Cassandra, Redis).
Integrate the Rails-based campaign management dashboard.
Manage configuration with Chef and build automation with Jenkins.
Leverage AWS cloud infrastructure (EC2, S3, ElastiCache, etc.).
Technologies:** Node.js, Ruby, AWS, Chef, Jenkins
Summary
Hi there! I am an experienced software engineer and tech lead with a focus on complex web applications. My current key technologies are Ruby (Rails) and JavaScript (TypeScript, Node.js, React). I have working knowledge and plenty of experience in the full web stack through a wide range of projects, with an emphasis on backend technologies. With more than fifteen years of hands-on experience under my belt, I know how to build effective and pragmatic solutions for my clients, using the tools that suit the job. I also enjoy sharing and discussing this with others, as well as helping my team succeed. In my work, I enjoy simple yet beautiful and maintainable code. I embrace change and constraints, and I mostly thrive in agile and lean environments.
Why work with me? I am offering:
- software development with Ruby (Rails) and JavaScript (TypeScript, Node.js, React)
- support with dev-ops and automation (Docker, CI/CD, Kubernetes, Terraform, AWS)
- leading and mentoring of engineering teams
- support with technical project management and planning
In the collaboration of your team with me, you will receive these benefits:
- Your software is state of the art, maintainable, and well-ordered.
- Your software is based on a deliberate and extendable architecture.
- Technical decisions are well-prepared and documented.
- Your team works in a goal-oriented, agile and lean manner.
- You gain insight into new approaches, best practices, and technologies as used by similar companies.
Languages
Education
Maastricht University
MSc · International Business · Maastricht, Netherlands
Växjö University
Media Technology · Växjö, Sweden
FHTW Berlin
BSc · Media and Computing · Berlin, Germany
Certifications & licenses
Certified Kubernetes Application Developer (CKAD)
Similar Freelancers
Discover other experts with similar qualifications and experience
Freelance Go-Developer/DevOps-Engineer
AR/VR/XR Architect
Software Developer
Test Coordinator, Designer and Engineer
Mobile & Full-Stack Engineer
Proof-Of-Concept
Freelancer | Kubernetes Expert (Kubestronaut) | Cloud Engineer
Founder, Senior Solution Architect, TeamLead, Senior DevOps-Engineer
Python Engineer and Cloud Migration Consultant
AI Engineer, Cloud Solution Architect, Backend Developer
DevOps
Backend Python Engineer
Senior DevOps Consultant (Freelance)
Senior Web/Frontend Developer
Java Architect/Developer – Freelancer
Software Developer
Senior Consultant
Freelance Fullstack Developer
Cloud Architect & Lead Developer
Technical Product Owner – AI & Data Platform on AWS
Senior Full Stack Developer / Co-Founder / CTO / Head of Development
General ERP and AI Consulting
Senior Application Developer
Senior Data/ML Consultant & Technical Lead
Head of Software Development & Engineering
Senior Software Developer
Lead Fullstack Node/React Developer
Tech Lead, Interim CTO/CPO
Architect & Senior Cloud Developer - NEO OCR
Senior Golang Engineer
- English
- Deutsch
2025 © FRATCH.IO GmbH. All rights reserved.