Peter Teich
Freelance Go-Developer/DevOps-Engineer
Experience
Freelance Go-Developer/DevOps-Engineer
IONOS SE
- Implementation of an API for customers to provide NFS shares in the cloud
- Creating Kubernetes operators and services with REST-APIs in Go
- LinuxKit for provisioning VMs
Freelance Go-Developer
Institut für Bildungsanalysen BaWü
Adapting open-source software (Gitea, Forgejo) for school use
Gitea is a self-hosted Git system written in Go, offering features similar to GitHub. It is meant to be used in computer science classes in schools in BaWü, and I adjust features for this purpose (e.g., user management)
Ansible deployments, Docker Swarm
The deployment runs on dedicated servers in Docker containers using Docker Swarm. I help with creating the Docker images as well as the deployment with Ansible
Freelance Go-Developer
Energy sector
Web services, REST-APIs and microservices in Go
In this project, I adapted and created Go microservices that provide REST-APIs and gRPC APIs both for other internal services and mainly for the web frontend built in ReactJS
MongoDB, Kubernetes deployments, Azure DevOps, AKS deployments, Terraform
The microservices are compiled in Azure DevOps pipelines and Docker images are created. My task was to adapt existing pipelines for new services. I also created and maintained a new pipeline that allows restoring backups of individual collections of a managed MongoDB (Atlas) via CI
To create secrets and resources in Azure, I adapted and extended existing Terraform scripts
Freelance Go-Developer
LynqTech GmbH
Web services, REST-APIs and microservices in Go
Here I further developed microservices that provide APIs for the frontend (ReactJS) and map internal scheduled processes (fetching and verifying invoices, creating tax statements) in the energy industry
PostgreSQL, Kubernetes deployments
The services use PostgreSQL as the database and manual SQL queries without an ORM. For deployment, I had to adapt and maintain existing Helm charts
Freelance DevOps-Consultant
Computacenter AG & Co OHG
DevOps support for Kubernetes, OpenSearch and Fluentbit
The client manages large amounts of logs generated by their own internal systems as well as delivered by external systems. OpenSearch in Kubernetes was chosen for storage. My task was to create proof-of-concept implementations for using Fluentbit to collect logs from Docker containers and syslog sources, parse them and route them to different endpoints based on various criteria. The client had no in-house know-how for using Fluentbit, so knowledge transfer and training were important here
Log analysis and dashboards with OpenSearch
Creating PoCs, training and support for internal employees
Kubernetes deployments, Helm charts, ArgoCD, Terraform
Since deployment was done via Terraform and Helm charts, I helped adapt existing Terraform scripts that, among other things, deployed Fluentbit via Helm charts
Freelance Go-Consultant
KPS AG
Go support and coaching, code reviews
The client wanted Go support for an internal team that was building services in Go for the first time. We created service blueprints together and ran custom training sessions. I reviewed the code the team wrote and gave suggestions for changes
GCP serverless functions, GitLab CI
The Go code uses serverless functions in GCP. Deployment is done via pipelines in GitLab. I adapted build scripts for compiling the Go services
Freelance DevOps/Go-Consultant
EOS Technology Solution GmbH
Backend development of web services and microservices in Go for platform/DevOps services
For the client, I built a new service that offers a REST API for internal developers to install, configure, and remove their own Graylog instances in Kubernetes. The service uses the Kubernetes API and a PostgreSQL database
Log analysis with Graylog
Adjusting existing Ansible scripts for Graylog deployment
Kubernetes, GitLab CI, ArgoCD
The services are deployed in Kubernetes using a GitOps approach. I created Helm charts that ArgoCD deploys
Freelance Go-Consultant
NFON AG
- Go code reviews for microservices
- Go coaching
- Planning new Go services
Freelance DevOps/Go-Consultant
SAP SE
Backend development of web services and microservices in Go with GraphQL
The client runs an internal web app in ReactJS. My task was to maintain and build the backend services it needs. The interface between frontend and backend was GraphQL
Backend code reviews in Go
Kubernetes operators in Go
Besides services that serve GraphQL to the frontend, many backend services were set up as Kubernetes operators, since no database was used and the data was stored in Kubernetes custom resources
Freelance Go-Developer
LynqTech GmbH
- Web services, REST APIs, and microservices in Go (energy sector)
- Kubernetes deployments
Freelance Go-Coach/Trainer
Wild Code School
- Go training as part of the Software Engineering Academy for Deutsche Telekom AG
- Live coding for Go and Docker/Kubernetes, code reviews
Freelance DevOps/Go-Consultant
SAP SE
- Cloud-native backend development with Go
- API integration with AWS, GCP and Azure SDKs to fetch capabilities of cloud services
- The backend service uses the SDKs of the major hyperscalers to discover and maintain data such as available VMs, pricing, storage classes, etc. Data is provided via REST APIs to a ReactJS frontend for display. My task was to implement functions to retrieve and store data from the hyperscalers
- Dynatrace API, CLI tools for Dynatrace Cluster Operations
Freelance Go-Consultant
Accendere GmbH
- Backend development with Go, coaching internal developers in Go best practices
- Migration of PHP code to Go
- Go microservices architecture with RabbitMQ, GraphQL and MySQL
Freelance DevOps-Engineer
MOIO GmbH
- DevOps consultant, microservices architecture
- GitLab CI/CD, Kubernetes deployments with ArgoCD
Freelance Go-Consultant
Plazz AG
- Backend development with Go, coaching internal teams in Go programming
- Migration of PHP code to Go
- Go microservices architecture with event bus integration (NATS) and MongoDB
- Kubernetes deployments
Freelance Go-Developer
TUI.com
- Backend development with Go, coaching internal teams in Go programming
- Migration from a Java monolith to Go microservices, integration with Redis and MongoDB
- Code reviews
Freelance Fullstack-Developer
Crosscan GmbH
- Backend development with NodeJS/Express, MariaDB, MSSQL Server
- Backend development with Go
- Frontend development with ReactJS and Material Design
- Integration and control of e-paper displays via REST API (Smart ESL, Pricer)
- Deployment with Docker, Docker Compose
Freelance Go-Developer
Dr. Ing. h.c. F. Porsche AG
- Code reviews / quality assurance for Go code
- Backend development with Go
- Consulting on software architecture and Docker usage
- Go tools for delivering certificates via the ACME protocol and integration with an internal CA
- Deployment with GitLab CI/CD and Docker
Freelance Go-Developer
OTTO GmbH & Co KG (OTTO IT)
- Backend development with Go and bug fixes for existing Java services (Spring)
- Support for the frontend team (ReactJS, Redux, Semantic UI)
- Microservice architecture, Kafka event bus, MongoDB integration, Nomad, Docker, Consul, GoCD
- Agile development using Scrum, Atlassian stack (Jira, Bitbucket, Confluence)
Freelance Go-Developer
Mogic GmbH
- Development of a Go backend for communication with IoT devices
- Implementation of a binary protocol on the IoT side to a REST API on the web side
Freelance DevOps Engineer
About You GmbH
- DevOps engineer in the operations team
- Deployment and administration of cloud instances on Debian using Ansible and Packer
- Configuration of Nginx for PHP environments
- Support for the transition of services to AWS
- Planning and optimization of server infrastructure together with the dev teams
- Agile development with Scrum and Kanban, Atlassian stack (Jira, Bitbucket, Confluence), Jenkins CI
Freelance Developer
Radio Hamburg
- Development of a system to automatically create web radio streams from playlists using LiquidSoap, Icecast, NodeJS and Go in a distributed microservice architecture
- Deployment and high-availability strategy using Docker and Ansible
- Server infrastructure for real-time metadata processing (artist, song) using RabbitMQ and a NodeJS backend to serve metadata to external web players
Freelance Developer/DevOps Engineer
a-tune Software AG
- Development of a Go middleware for log data processing and aggregation for Elasticsearch/Kibana (XML, CSV, server logs)
- Visualizations and dashboards based on client requirements
- Coaching of technical users in the company on using Kibana
CTO + Co-Founder
QuantumCast GmbH/streamABC GmbH
- Planning and development of an audio streaming solution based on distributed microservices in Go using FFMPEG, Liquidsoap and Icecast
- High-concurrency Go services
- Backend development in Go, NodeJS, PHP and frontend development (radio player) with HTML5/JavaScript/SASS, SDK development
- Distributed Docker-based infrastructure and service structuring (Nomad, Consul, RabbitMQ)
- Deployment and operation of services with Ansible and Docker, orchestration with Kubernetes
- Aggregation and analysis of log data with OpenSearch, Fluentbit, InfluxDB, Grafana and Kibana
- Technical project management
Freelance Developer
Druck und Werte GmbH
- Planning and software architecture of an RIA in the B2B sector (print/media)
- Development in PHP (Zend Framework) and support of the Java team in APIs/REST interfaces and frontend (CSS, JS)
- Administration and operation of services (Linux VMs), Nginx web server, GitLab
- Software reviews, audits and quality assurance
Freelancer Developer
Green-M Interface Design GmbH
- Web development (frontend/backend) for various agency clients using PHP (Zend Framework), JavaScript, HTML, CSS, MySQL with custom CMS solutions
- Planning and optimizing the architecture of web applications and REST APIs for apps
- Planning and setting up search systems based on ElasticSearch for portal sites. Indexing and search with JavaScript and PHP clients
- Administration of Linux server systems (Debian, Ubuntu)
- Source code audits including code quality checks
Freelancer Developer
torpedo Leipzig GmbH
- Web development (frontend/backend) for various agency clients using PHP (Zend Framework), JavaScript, HTML, CSS, MySQL with custom CMS solutions as well as RIAs in the B2C and B2B areas
- System administration of internal servers (Mac OS X, Linux) and external servers (physical and virtual, Debian + Ubuntu Linux)
- Log analysis and aggregation
- Technical project management, workflow modeling
Freelancer Developer
Motor Entertainment GmbH
- Development and maintenance of a comprehensive editorial system for a music magazine and label based on PHP (Zend Framework), MySQL, JavaScript, and HTML
- Planning and development of a newsletter system
- Data analysis of log data and statistics
- System administration of the used Linux servers (Ubuntu, Debian)
Freelancer Technical Writer
Herdt-Verlag
- Author of training materials, e.g. VBA programming with Office, Perl 5, SQL databases
- Technical editor for training materials
Semester Abroad
ENIC TELECOM LILLE 1
- Project work: web/database development, Perl, CGI, Oracle
Studies in Communications Engineering
Deutsche Telekom University of Applied Sciences, Leipzig
- Specialization in technical documentation
- Diploma Engineer (FH) in communications engineering, technical editor
- Thesis: “Creating a user manual for the time tracking, access control, and user software Leancom 4.0 for Windows” (Grade: 1)
German Abitur
Am Breiten Teich High School
- German Abitur
Industries Experience
See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.
Experienced in Media and Entertainment (24 years), Information Technology (20 years), Professional Services (11 years), Education (6.5 years), Telecommunication (6.5 years), and Retail (3 years).
Business Areas Experience
The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.
Experienced in Information Technology (25 years), Product Development (25 years), Project Management (20 years), Quality Assurance (15 years), Operations (10 years), and Business Intelligence (7 years).
Summary
Developing innovative solutions using current technologies with over 20 years of experience in software development, data analysis, operations and administration, as well as training and coaching.
Holistic view on projects, from architecture to frontend/backend development, all the way to deployment and operations.
Analysis and aggregation of log data and metrics with ElasticSearch/OpenSearch, Prometheus and InfluxDB.
Focus on backend development with Go (Golang), microservice architectures, and up-to-date DevOps technologies (Docker, Ansible, Kubernetes, ArgoCD, Hashicorp Nomad & Consul).
Event-based real-time solutions with RabbitMQ, Kafka, NATS and Websockets.
Skills
Programming Languages
- Go (Golang)
- Javascript (Nodejs)
- Php
- Python
- Sql
- Html
- Css
- Perl
- Bash
Technologies
- Git
- Docker
- Kubernetes
- Ansible
- Reactjs
- Express
- Laravel
- Aqmp
- Rest-apis
- Websockets
- Ffmpeg
- Liquidsoap
Server Services
- Icecast
- Apache
- Nginx
- Rabbitmq
- Kafka
- Nats
- Consul
- Nomad
- Vault
- Caddy
- Minio
Databases
- Mysql (Mariadb, Percona)
- Elasticsearch/opensearch
- Redis
- Influxdb
- Mongodb
- Couchbase
- Cockroachdb
Operating Systems
- Linux (Admin Experience)
- Windows (User Experience)
- Macos (User Experience)
Languages
Education
Hochschule der Deutschen Telekom Leipzig
Dipl.-Ing. (FH) in Telecommunications Engineering, Technical Editor · Telecommunications Engineering · Leipzig, Germany
ENIC Telecom Lille 1 - École nouvelle d'Ingénieur en Télécomunications
Telecommunications · Lille, France
Gymnasium „Am Breiten Teich“
High school diploma · Borna, Germany
Profile
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