Kim Kern
Senior Fullstack Developer
Experience
Nov 2023 - Jan 2024
3 monthsLead Fullstack Node/React Developer
RYTLE
- Development of React.js / Next.js web application, displaying live sensor data and optimized routes on interactive maps.
- Architected and managed Node.js backend services in Docker containers integrated with Kafka, responsible for order management and routing.
- Guided and supported junior developers in their professional growth as team lead developer.
Technologies: node.js, React, TypeScript, Postgres, Docker, Kafka, Github CI, ArgoCD
Nov 2021 - Apr 2023
1 year 6 monthsDeveloper for Microservice Logistics Platform
LEOGISTICS
- Integrated real-time sensor data (AWS SNS/SQS) and created a scalable rule-based alerting system using Dapr.
- Established a lerna monorepo for internal npm packages with an automated Gitlab CI pipeline for semantic releases.
- Conducted performance analysis (node clinic) and refactoring/splitting of existing microservices.
Technologies: nestjs, node.js, TypeScript, mongoDB, AWS, NATS, GitlabCI, Kubernetes, Dapr
Mar 2021 - Sep 2021
7 monthsEngineering Manager for React-Native App Features
Klarna
- Led the Form Filling team as the Competence Lead, responsible for technical design decisions, team meetings, and personal development of team members.
- Enhanced analytics/monitoring and defined KPIs across teams, leveraging domain knowledge.
- Defined domain standard for SLOs as member of the Operational Excellence Group.
Technologies: React Native, node.js, TypeScript, Amplitude, Redux, Splunk, Datadog
Mar 2020 - Mar 2021
1 year 1 monthFull Stack Lead Developer for Web Automation APIs
Klarna
- Developed multiple backend services using Node.js, enabling advanced web automation capabilities for internal stakeholder teams.
- Built CLI tools and browser add-ons for data collection and generation, automated through a Jenkins pipeline.
- Integrated APIs into Klarna's React Native app and implemented metrics in Amplitude for monitoring successful go-live and ongoing operations.
Technologies: node.js, TypeScript, Express, PostgreSQL, Puppeteer, Jest, Jenkins, AWS, Splunk
Feb 2020 - Mar 2020
2 monthsSocial Network Platform with Real-time Data
LINKBASE
- Developed a progressive web app prototype, focusing on social networking with real-time data integration from a Firebase database.
- Collaborated closely with the product owner/designer, maintaining an agile development approach and incorporating direct feedback.
Technologies: Angular, TypeScript, Angular Material, Firebase, Service Worker
Jan 2018 - Present
7 years 2 monthsDeveloper
Freelance
Main focus: node.js, React.js, TypeScript
Jan 2014 - Dec 2020
7 yearsSoftware Developer (part time)
Projektron GmbH
Project management software
Java, JS/TS, SQL, Postgres, Jenkins, Scrum
Summary
Freelance Software Entwickler mit Fokus auf Backend-Entwicklung mit Node.Js und besonderen Kenntnissen in NestJS.
Languages
German
Native
English
Advanced