Freelancer profile translated to English.

Description

I am a backend-focused Fullstack Engineer with 5+ years of experience in developing scalable, maintainable systems. My core lies in Golang and Java – from Greenfield projects to migrating existing monoliths into microservice architectures.

I bring experience from various industries and am accustomed to quickly learning new domains. Typical tasks: System Design & Clean Architecture, Kubernetes-based deployments, CI/CD pipelines, and performance optimization under load.

I work in a structured, self-reliant manner and deliver reliably even in complex technical environments – remotely or on-site.

Industry field of expertise

Languages

German
Native or bilingual
English
Fluent

Workplace preferences

Can work on-site

Berlin (up to 50km)

Jeff-Bot - Community-Tool für Rennsimulationen
Lead Software Architect
ENTERTAINMENT AND LEISURE
March 2022 - Today (4 years and 5 months)
Berlin, Germany
Technologies & Tools:
Golang, React, TypeScript, MongoDB, GraphQL, gRPC, REST, Docker, Clean Architecture, GIT/Gitlab, Trello
(Kanban), Notion, Agile Software Development (SCRUM)

Achievements:
Successful beta operation with over 15 communities and more than 1,000 individual users.
Implementation of a secure authentication flow using OAuth2 (Login with Discord) for seamless user management.
Efficient caching of recurring requests using Redis and rate limiting via Caddy.
Realization of cross-service request tracking (tracing IDs) for precise error localization in the distributed architecture.
Setup of a full-stack monitoring solution (Prometheus, Loki, Grafana) for proactive error resolution.
Realization of an intuitive web interface with React and Mantine for full configurability.
User-friendly interaction via a Discord bot for direct control on community servers.
React.js GO Python GraphQL MongoDB
InMediasP GmbH
Fullstack Engineer
AUTOMOBILE
June 2020 - January 2024 (3 years and 7 months)
Hennigsdorf, BB, Germany
Technologies & Tools:
Java, Spring Boot, Hibernate, PostgreSQL, VueJS, TypeScript, Groovy, Junit, OpenAPI/Swagger, REST, Kafka, SOAP, Vite, Jenkins, Elasticsearch, OpenSearch, Docker, Kubernetes, Helm, Kong, Traefik, Eclipse, IntelliJ, GIT/Github, Agile Software Development (SCRUM), Jira, Confluence

Achievements:
Conducted feasibility studies and prototyping to analyze technical implementation paths and precise effort estimation.
Successful migration of Kubernetes clusters to a new location, including the implementation of Kong API Gateway and automated TLS certification (ACME).
Conception of a task management system with a job ID architecture and polling mechanism for decoupling long-running processes.
Refactoring of a monolith into a scalable distributed architecture to optimize system load.
Setup of modular deployment pipelines using Jenkins, Helm Charts, and Kubernetes.
Transformation of existing offline tools and backend endpoints into intuitive web applications using Vue.js 2.7 and TypeScript.
Preparation for migration from Vue 2 to 3 via Vue 2.7 for early adoption of the Composition API.
Java Spring boot Vue.js Typescript PostgreSQL
Pulpo - Startup-Initiative (Social Betting & Gamification)
Backend Developer (Technical Co-Founder)
ENTERTAINMENT AND LEISURE
February 2020 - November 2021 (1 year and 9 months)
Berlin, Germany
Technologies & Tools:
Golang, React, TypeScript, MongoDB, GraphQL, gRPC, REST, Docker, Clean Architecture, GIT/Gitlab, Trello (Kanban), Notion, Agile Software Development (SCRUM)

Achievements:
Built a distributed system with a central API gateway and consistent application of Clean Architecture in all backend services.
Implementation of a GraphQL interface to the frontend and high-performance gRPC communication for service-to-service data exchange.
Development of an identity service with encrypted storage of sensitive user data in MongoDB.
Conducted moderated usability tests to identify friction points in the competition flow and subsequent optimization of UI/UX.
GO GraphQL Microservices MongoDB React.js

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Computer Science Bachelor
Berliner Hochschule für Technik
2019
Informatik Bachelor
for Operations Technology
DB Netz AG
2013
für Betriebstechnik

Michael Radzieda

Fullstack Engineer with Backend Focus

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